• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to an H-bridge device and a method for controlling an H-bridge, driving a load (M) such as a DC electric motor, configured to prevent any polarity reversal in the load when a discharge phase thereof, without requiring limitation of use of the pulse generator supplying said H bridge in terms of duty cycle. The H-bridge device according to the invention comprises independent comparators and independent slope control means, at each of the switches of the H-bridge. In addition, according to a preferred embodiment, the device according to the invention comprises push-pull drivers imposing the potential of VBAT / 2 at connection points OUT0, OUT1, on either side of the load M, in order to limit the electromagnetic disturbances.
    公开号:FR3047619A1
    申请号:FR1650968
    申请日:2016-02-08
    公开日:2017-08-11
    发明作者:Thierry Bavois
    申请人:Continental Automotive GmbH；Continental Automotive France SAS；
    IPC主号:
    专利说明:

    The invention relates to the field of integrated electronic circuits, in particular H-bridge devices, commonly referred to as "H-bridge", for controlling the polarity across a load. by means of a plurality of switches controlled for example by means of a pulse generator.
    More specifically, the present invention seeks to provide a device and an associated method for optimizing a symmetrical management of the switching of a controlled load via such a bridge in H.
    The H-bridge is an electronic structure used, in general, to control the polarity across a load. It consists of four switching elements generally schematically arranged in a H-shape. The switches may be relays, transistors, or other switching elements, depending on the intended application. H-bridges are used in many power electronics applications, including motor control, converters and choppers, and inverters.
    As known to those skilled in the art, the H-bridge, as shown schematically in Figure 1, is implemented by activating the switches in different combinations to obtain the desired connection.
    The H-bridge makes it possible to perform two main functions which respectively consist in reversing the direction of rotation of the motor M, inverting the voltage across said motor, and varying the speed of the motor M, by modulating the voltage across said motor .
    In conventional manner, the H-bridge drives a load, typically a DC electric motor M. The H-bridge is therefore mainly intended to supply said load current, in both directions. To do this, the H-bridge consists of an electronic circuit in H comprising switches, generally transistors, able to be controlled closed or open, respectively ON or OFF, depending on the direction of the current to feed the load. Usually, with reference to FIG. 1, the ground-side H-bridge leg portions, i.e. including the second and fourth LSO and LS1 switches, are referred to as "LowSide"; on the other hand, the H-side branch portions located on the power supply side and including the first and third HSO and HS1 switches, are referred to as "HighSide", in accordance with the technical jargon in English, known to the skilled person.
    As mentioned previously, Figure 1 shows a conventional bridge H. The transistors HSO, HS1, LSO, LS1 are controlled by a microcontroller (not shown). To power the motor M in a direct direction, the transistors HSO and LS1 are closed, and the transistors HS1 and LSO are open. In this case, the H-bridge feeds the motor M in the direct direction, or "forward" according to the commonly used English term, going from the first switch HSO to the fourth switch LS1 in FIG. 1. Conversely, for supplying the motor M with current in the opposite direction, the transistors HS1 and LSO are closed, and the transistors HSO and LS1 are open. In this case, the H-bridge supplies the motor M with a current going in the reverse direction, or "reverse" according to the commonly used English term, going from the second switch HS1 to the third switch LSO in FIG.
    The commutations of the switches are controlled by means of a pulse generator (not shown) having, alternately, a high state and a low state, of variable duration.
    The first and third switches HSO and LSO are also connected to the load constituted by the motor M by a first connection point OUTO while the second and fourth switches HS1 and LS1 are connected to the motor M by a second connection point OUT1.
    In addition, the H-bridge can enable magnetic braking by dissipating the power generated. In the general case, the two upper switches HSO, HS1 or lower LSO, LS1 are then actuated simultaneously, which bypasses the terminals of the motor M, and therefore makes it discharge.
    There are, however, different strategies for controlling an H-bridge, especially in order to allow faster switching and less emitting electromagnetic disturbances. Thus, a known technique, referred to as "lock anti-phase mode" in English, is "mode of locking in phase opposition", allows to control the four switches of an H bridge using a pulse generator, without the need to short circuit the load to discharge it, according to the principle briefly described below.
    With reference to FIG. 1, the battery BAT supplies the voltage VBAT to the bridge in H. The said H bridge is controlled using a pulse generator located at a high level, and the first and fourth switches HSO and LS1 are closed, so as to load the motor M in the forward direction.
    To reduce the current in the load, that is to say to discharge the motor M, it is possible to open the first and fourth switches HSO, LS1, a possible event of charging the battery BAT occurring then, then closing the second and third switches HS1, LSO, to allow the flow of current in the opposite direction, to discharge the motor M, but being careful not to go to reverse the polarity at the load. Such an inversion of polarity in the motor M, if it occurred, would indeed be damaging for said motor M because it would cause an unwanted inversion of its direction of rotation.
    This need to refrain from causing a reversal of polarity in the motor M generates a strong constraint on the control of the bridge in H. In practice, according to the state of the art, the duty cycle of the pulse generator must be fixed. at 50%, to ensure that the discharge of the motor M will not result in a reversal of the polarity in said motor.
    This constraint is a very inconvenient disadvantage, and even prohibitive when it comes to ensuring the control of an H bridge driving a DC motor in a motor vehicle.
    There is therefore a need for an improved H-bridge device and a method of controlling such an H-bridge to implement a control mode of said H-bridge according to the principle of "lock anti-phase mode" described above, providing additional means to ensure the detection of any risk of reverse polarity and the management of such a risk, without constraining the duty cycle of the pulse generator used.
    Thanks to the present invention, it is thus possible to control an H bridge driving a load, quickly and safely. According to one embodiment, the H-bridge device according to the invention is also weakly emitting electromagnetic interference by controlling the potentials of the connection points to the load. To this end, the present invention relates to a balanced symmetrical switching H-bridge device, said H-bridge comprising a first, a second, a third and a fourth switch distributed over two branches of the H-bridge supplying a load. said four switches distributed over two branches being arranged with respect to said load so that the first and third switches are connected to the load via a first connection point on one side of the load and the second and fourth switches are connected to the load via a second connection point on the other side of the load, such that closing a pair of switches, including the first and fourth switches, allows current to flow through the load in a forward direction, and that closing the other pair of switches, including the second and third switches, allows the current to flow to t reverse the load, an upper part of the H-bridge, called "HighSide", comprising the first and second switches, being intended to be connected to a power supply, and a lower part of the H-bridge, called "LowSide" , comprising the third and fourth switches, being intended to be connected to a ground, said H-bridge device being intended to be controlled by means of a pulse generator having a high state or a low state. According to the invention, the H-bridge device comprises independent comparators, for comparing the intensity of the current flowing through each of the switches at a reference intensity, said switches and said comparators being configured so that when the pulse generator is in a high state, the first and fourth switches being closed, so as to load the load in the forward direction: i. when the pulse generator switches to a low state, the first and fourth switches are open, ii. when the four switches are open, after a dead time, the second and third switches are closed, so as to ensure the discharge of the load, the independent comparators ensuring the comparison of the intensity of the current passing through each of the switches at the intensity reference, iii. if the intensity of the current flowing through one of the switches becomes less than the reference intensity, the second and third switches are open, iv. when the pulse generator switches to a new high state, if the second and third switches have been opened in the previous step, step i. is again implemented, if not, the second and third switches are open, then, after a timeout, step i. is again implemented.
    Advantageously, said switches and said comparators are configured so that, when the pulse generator is in a high state, the second and third switches are closed, so as to ensure the charging of the load in the opposite direction: i. when the pulse generator switches to a low state, the second and third switches are open, ii. when the four switches are open, after a dead time, the first and fourth switches are closed, so as to ensure the discharge of the load, the independent comparators ensuring the comparison of the intensity of the current passing through each of the switches at the intensity reference, iii. if the intensity of the current flowing through one of the switches becomes less than the reference intensity, the first and fourth switches are open, iv. when the pulse generator switches to a new high state, if the first and fourth switches have been opened in the previous step, step i. is again implemented, if not, the first and fourth switches are open, then, after a timeout, step i. is again implemented.
    According to a preferred embodiment, the balanced symmetrical switching H-bridge device according to the invention also comprises independent means for controlling the current and voltage slopes, controlling the evolution as a function of the time of the intensity of the current flowing through each of said switches and the evolution as a function of time of the voltage across each of said switches, said independent current and voltage slope control means being configured and controlled so as to ensure that the Negative evolution of the current and voltage on the side of the lower part of the H-bridge and the positive evolution of the current and voltage on the side of the upper part of the H-bridge, on each side of the load, take place at the same speed, so that the sum of the potentials at the connection points, on either side of the load, is constant.
    According to one embodiment, the balanced symmetrical switching H-bridge device comprises means for setting a reference potential equal to half of the high state to the connection points, on either side of the load, when each of said switches is open.
    This has the advantage of ensuring that the sum of the potentials at the connection points, on either side of the load, is constant and equal to the supply voltage, whether the switches are closed, in the switching phase, or open.
    According to one embodiment, the means for setting the reference potential at the connection points, on either side of the load, consist of a resistive bridge and a push-pull driver, on either side of the load, each of said push-pull drivers being respectively connected to a connection point.
    According to one embodiment, the reference intensity is equal to 100pA. This makes it possible to ensure that the current flowing through each switch is greater than this reference current, so as to avoid any polarity inversion across the load. The invention also relates to a symmetrical switching method of a symmetrically-balanced load-switching H-bridge according to one of the preceding characteristics, comprising the following steps, when the pulse generator is in a high state, the first and fourth switches being closed, so as to load the load in the forward direction, and the current and voltage slope control means of said first and fourth switches ensuring that the sum of the potentials at the connection points to the load, on either side of the load, be equal to a constant: i. when the pulse generator switches to a low state, the first and fourth switches are open, the current and voltage slope control means of said first and fourth switches ensuring that the sum of the potentials at the connection points to the load, on either side of the load, equal to a constant, ii. when the four switches are open, after a dead time, the second and third switches are closed, so as to ensure the discharge of the load, the independent comparators ensuring the comparison of the intensity of the current passing through each of the switches at the intensity reference, iii. if the intensity of the current flowing through each of the switches becomes lower than the reference intensity, the second and third switches are open, the means for controlling the current and voltage slopes of said second and third switches ensuring that the sum of the potentials at the points of connection to the load, on either side of the load, equal to a constant, iv. when the pulse generator switches to a new high state, if the second and third switches have been opened in the previous step, step i. is again implemented, if not, the second and third switches are open, the means for controlling the current and voltage slopes of said second and third switches ensuring that the sum of the potentials at the connection points to the load, on the part and else of the charge, be equal to a constant, then, after a timeout, step i. is again implemented.
    According to such a symmetrical switching method of an H-bridge, when the pulse generator is in a high state, the second and third switches being closed, so as to ensure the charging of the load in the opposite direction, and means for controlling the current and voltage slopes of said second and third switches ensuring that the sum of the potentials at the points of connection to the load, on either side of the load, is equal to a constant: i. when the pulse generator switches to a low state, the second and third switches are open, the current and voltage slope control means of said second and third switches ensuring that the sum of the potentials at the connection points to the load, on either side of the load, equal to a constant, ii. when the four switches are open, after a dead time, the first and fourth switches are closed, so as to ensure the discharge of the load, the independent comparators ensuring the comparison of the intensity of the current passing through each of the switches at the intensity reference, iii. if the intensity of the current flowing through each of the switches becomes lower than the reference intensity, the first and fourth switches are open, the means for controlling the current and voltage slopes of said first and fourth switches ensuring that the sum of the potentials at the points of connection to the load, on either side of the load, equal to a constant, iv. when the pulse generator switches to a new high state, if the first and fourth switches have been opened in the previous step, step i. is again implemented, if not, the first and fourth switches are open, the means for controlling the current and voltage slopes of said first and fourth switches ensuring that the sum of the potentials at the connection points to the load, on the part and else of the charge, be equal to a constant, then, after a timeout, step i. is again implemented. The invention will be better understood on reading the description which follows, given solely by way of example, and with reference to the appended drawings, in which: FIG. 1 shows an H-shaped bridge device according to the state of the art; art; FIG. 2 represents an example of an H-bridge device according to the invention, with means for controlling the slope and controlling the intensity of the current at each of the switches.
    It should be noted that the figures expose the invention in detail to allow implementation, said figures can of course also serve to better define the invention. The invention is presented primarily for application in an integrated circuit comprising an H bridge for controlling an electric motor in a motor vehicle. However, other applications are also covered by the present invention, particularly in the context of controlling any type of electric load by an H-bridge.
    FIG. 1 is representative of the state of the art and shows an H bridge driving a load M. FIG. 1 has already been described previously.
    With reference to FIG. 2, the H-bridge device according to the invention, in addition to the one previously described to illustrate the state of the art, comprises independent comparators CHO, CH1, CLO, CL1 monitoring the intensity of the current through each of said switches HSO, HS1, LSO, LS1, and, according to the embodiment shown, independent means for controlling the current and voltage slopes SHO, SH1, SLO, SL1 at each switch HSO, HS1 , LSO, LS1.
    Controlled in "anti-phase mode lock", said H-bridge operates, as previously described, as follows. The power supply delivers the VBAT voltage to the H bridge. The first and fourth switches HSO and LS1 (respectively the second and third switches HS 1, LSO) are closed, so as to ensure the loading of the motor M in the forward direction (respectively in the opposite direction), said load "seeing" a high level of power. To discharge the motor M, the first and fourth switches HSO, LS1 (respectively the second and third switches HS1, LSO) are open (a phenomenon of possible charge of the battery then occurring), then the second and third switches HS1, LSO (The first and fourth switches HSO, LS1 respectively) are closed to allow the discharge of the motor Μ. It is then necessary to be sure not to cause a reversal of the polarity at the level of the load, because that could have very damaging consequences.
    The independent comparators CHO, CH1, CL0, CL1 thus compare the intensity of the current flowing through each of the switches HSO, HS1, LSO, LS1 to a reference current. If the current flowing through a switch becomes lower than the reference current, typically of the order of 100 pA, then the switches are immediately opened.
    According to the invention, preferably, the detection of the imminent inversion of the polarity is thus performed both in the ON branch and in the OFF branch.
    If the intensity of the current in a branch becomes very weak, typically less than 100 μΑ, then the switches HSO, HS1, LSO, LS1 are open. On the other hand, according to a preferred embodiment, independent means for controlling the current and voltage slopes SHO, SH1, SLO, SL1 at each of the switches HS0, HS1, LS0, LS1 are intended to minimize the electromagnetic disturbances generated by switching.
    The principle consists in ensuring that the sum of the potentials at connection points OUTO, OUT1, on either side of the load constituted by the motor M, is equal to a constant, in this case equal to VBAT. For this, the independent slope control means SHO, SH1, SLO, SL1 control the evolution of the intensity of the current flowing through each of the switches and the evolution of the voltage across said switches, as a function of time. These independent slope control means SHO, SH1, SLO, SL1 are configured and controlled so as to ensure that the negative evolution of the current and the voltage on the "LowSide" side and positive revolution of the current and the voltage of the "HighSide" side, on each side of the load, take place at the same speed. Thus, the sum of the potential at the connection point OUTO and the potential at the connection point OUT1 is constant.
    In this way, the electromagnetic disturbances across the load are reduced.
    Furthermore, according to the preferred embodiment shown in Figure 2, a reference to the potential VBAT / 2 is further imposed at each connection point OUTO, OUT1, on either side of the motor M, in order to set the potential at said connection points in the case where the switches go to the open state, and are therefore unable to properly control the potential of said connection points OUTO and OUT1. This also minimizes the risk of electromagnetic interference. For this purpose, with reference to FIG. 2, a "push-pull" driver DO, respectively D1, associated with a resistive bridge, is connected to the connection point OUTO, respectively OUT1, on each side of the motor M, for impose a reference potential equal to half of the high state, VBAT / 2.
    Thus, in practice, according to the preferred embodiment shown in FIG. 2, the switches HSO, HS1, LSO, LS1, the slope control means SHO, SH1, SLO, SL1 and the comparators CHO, CH1, CLO, CL1 are configured so that, when the first and fourth HSO switches, LS1 are closed, so as to ensure the loading of the motor M in the forward direction, the means for controlling the current and voltage slopes SHO, SH1, SLO, SL1 said first and fourth switches HSO, LS1 ensuring that the sum of the potentials at connection points OUTO, OUT1 to the load, on either side of the load, is equal to a constant, i. when the pulse generator switches to a low state, the first and fourth switches HSO, LS1 are open, the current and voltage slope control means SHO, SH1, SLO, SL1 of said first and fourth switches HSO, LS1 assuring the sum of the potentials at the connection points OUTO, OUT1 at the load, on either side of the load, is equal to a constant, ii. when the four switches HSO, HS1, LSO, LS1 are open, after a dead time, the second and third switches HS1, LSO are closed, so as to ensure the discharge of the load, the independent comparators CHO, CH1, CLO, CL1 comparing the intensity of the current flowing through each of the switches HS0, HS1, LS0, LS1 to the reference intensity, iii. if the intensity of the current flowing through each of the switches HSO, HS1, LSO, LS1 becomes lower than the reference intensity, the second and third switches HS1, LSO are open, the current and voltage slope control means SHO, SH1, SLO, SL1 of said second and third switches HS1, LSO ensuring that the sum of the potentials at the connection points OUTO, OUT1 to the load, on either side of the load, is equal to a constant; to this end, preferably, the device according to the invention comprises push-pull type drivers imposing, during this phase, the potential of VBAT / 2 at connection points OUTO, OUT1, on either side of the load, so as to set the potential of said connection points when the switches go to the open state, iv. when the pulse generator switches to a new high state, if the second and third switches HS1, LSO have been opened in the previous step, step i. is again implemented, if not, the second and third switches HS1, LSO are open, the current and voltage slope control means SHO, SH1, SLO, SL1 of said second and third switches HS1, LSO ensuring that the sum potentials at connection points OUTO, OUT1 to the load, on either side of the load, is equal to a constant, then, after a dead time, step i. is again implemented. Conversely, again with reference to FIG. 2, when the second and third switches HS1, LSO are closed, so as to ensure the charging of the motor M in the opposite direction, the means for controlling the current and voltage slopes SH1, SLO said second and third switches HS1, LSO ensuring that the sum of the potentials at the connection points OUTO, OUT1 to the load, on either side of the load, is equal to a constant: i. when the pulse generator switches to a low state, the second and third switches HS1, LSO are open, the current and voltage slope control means SH1, SLO of said second and third switches HS1, LSO ensuring that the sum of the potential at connection points OUTO, OUT 1 to the load, on either side of the load, equal to a constant, ii. when the four switches HSO, HS1, LSO, LS1 are open, after a dead time, the first and fourth switches HSO, LS1 are closed, so as to ensure the discharge of the load, the independent comparators CHO, CH1, CLO, CL1 comparing the intensity of the current flowing through each of the switches HS0, HS1, LS0, LS1 to the reference intensity, iii. if the intensity of the current flowing through each of the switches HS0, HS1, LS0, LS1 becomes lower than the reference intensity, the first and fourth switches HSO, LS1 are open, the current and voltage slope control means SHO, SL1 of said first and fourth switches HSO, LS1 ensuring that the sum of the potentials at the connection points OUTO, OUT1 to the load, on either side of the load, is equal to a constant; preferably, the device according to the invention comprises push-pull type drivers imposing, during this phase, the potential of VBAT / 2 connection points OUTO, OUT1, on either side of the load, iv . when the pulse generator switches to a new high VBAT state, if the first and fourth HSO switches, LS1 have been opened in the previous step, step i. is again implemented, if not, the first and fourth switches HSO, LS1 are open, the current and voltage slope control means SHO, SL1 of said first and fourth switches HSO, LS1 ensuring that the sum of the potentials at the points connection OUTO, OUT 1 to the load, on either side of the load, is equal to a constant, then, after a dead time, step i. is again implemented.
    In summary, the present invention relates to an H-bridge device and a method for controlling an H-bridge, controlling a load such as a DC electric motor M, comprising independent comparators at each of the switches. the H-bridge, configured to prevent polarity inversion across the load during a discharge phase thereof, without requiring limitation of use of the pulse generator supplying said bridge H.
    According to a preferred embodiment, via independent means for controlling current and voltage slopes, at each of the switches of the H-bridge, and means for setting the reference potential at the connection points to a value equal to half of the supply voltage, the present invention also makes it possible to limit the electromagnetic disturbances
    The present invention is in particular intended for implementation in the automotive field, but may also be implemented in other areas in which an H-bridge is required to drive a load such as a DC motor.
    It is furthermore specified that the present invention is not limited to the examples described above and is capable of numerous variants accessible to those skilled in the art.
    权利要求:
    Claims (8)
    [1" id="c-fr-0001]
    A symmetrically balanced load-balanced H bridge device, said H-bridge comprising a first, a second, a third and a fourth switch (HSO, HS1, LSO, LS1) distributed over two branches of the H-bridge supplying a load (M), said four switches (HSO, HS1, LSO, LS1) distributed on two branches being arranged with respect to said load (M) so that the first and third switches (HSO, LSO) are connected to the load (M) via a first connection point (OUTO) on one side of the load (M) and the second and fourth switches (HS1, LS1) are connected to the load (M) via a second connection point (OUT1 ), on the other side of the load (M), such that the closing of a pair of switches, comprising the first and the fourth switches (HSO, LS1), allows the passage of current through the load ( M) in a forward direction, and that closing the other pair of switches, including the second th and third switches (HS1, LSO), allows the passage of current through the load (M) in the opposite direction, an upper part of the H-bridge, called "HighSide", comprising the first and second switches (HSO, HS1), being intended to be connected to a power supply (VBAT), and a lower part of the H bridge, called "LowSide", comprising the third and fourth switches (LSO, LS1), being intended to be connected to a ground, said H-bridge device being intended to be controlled by means of a pulse generator having a high state or a low state, characterized in that it comprises independent comparators (CHO, CH1, CLO, CL1 ), to compare the intensity of the current flowing through each of the switches at a reference intensity, the switches (HSO, HS1, LSO, LS1) and said comparators (CHO, CH1, CLO, CL1) being configured so that, when the generator of Pulse ions is in a high state (VBAT), the first and fourth switches (HSO, LS1) being closed, so as to load the load (M) in the forward direction: i. when the pulse generator switches to a low state, the first and fourth switches (HSO, LS1) are open, ii. when the four switches (HSO, HS1, LSO, LS1) are open, after a dead time, the second and third switches (HS1, LSO) are closed, so as to discharge the load (M), the independent comparators (CHO, CH1, CL0, CL1) comparing the intensity of the current flowing through each of the switches (HSO, HS1, LSO, LS1) to the reference intensity, iii. if the current through one of the switches (HSO, HS1, LSO, LS1) becomes lower than the reference intensity, the second and third switches (HS1, LSO) are open, iv. when the pulse generator switches to a new high state (VBAT), if the second and third switches (HS1, LSO) have been opened in the previous step, step i. is again implemented, if not, the second and third switches (HS1, LSO) are open, then, after a timeout, step i. is again implemented.
    [2" id="c-fr-0002]
    2. H symmetrical switching load bridge device according to the preceding claim, wherein said switches (HSO, HS1, LSO, LS1) and said comparators (CHO, CH1, CLO, CL1) are configured so that when the generator pulses is in a high state (VBAT), the second and third switches (HS1, LSO) being closed, so as to charge the load (M) in the opposite direction: i. when the pulse generator switches to a low state, the second and third switches (HS1, LSO) are open, ii. when the four switches (HSO, HS1, LSO, LS1) are open, after a dead time, the first and fourth switches (HSO, LS1) are closed, so as to discharge the load (M), the independent comparators (CHO, CH1, CL0, CL1) comparing the intensity of the current flowing through each of the switches (HSO, HS1, LSO, LS1) to the reference intensity, iii. if the intensity of the current flowing through one of the switches (HSO, HS1, LSO, LS1) becomes lower than the reference intensity, the first and fourth switches (HSO, LS1) are open, iv. when the pulse generator switches to a new high state, if the first and fourth switches (HSO, LS1) have been opened in the previous step, step i. is again implemented, if not, the first and fourth switches (HSO, LS1) are open, then, after a timeout, step i. is again implemented.
    [3" id="c-fr-0003]
    A symmetrically balanced load H-bridge device according to any one of the preceding claims, comprising independent means for controlling the current and voltage slopes (SHO, SH1, SLO, SL1), controlling the change in function the time of the intensity of the current flowing through each of said switches (HSO, HS1, LSO, LS1) and the evolution as a function of time of the voltage across each of said switches (HSO, HS1, LSO, LS1), said means independent current and voltage slope control devices (SHO, SH1, SLO, SL1) are configured and controlled to ensure that the negative evolution of current and voltage on the lower side of the H-bridge and the positive evolution of the current and the voltage on the side of the upper part of the H-bridge, on each side of the load (M), take place at the same speed, so that the sum of the potentials at the points of connections (OUTO, OUT1), from rt and other of the load (M), be constant.
    [4" id="c-fr-0004]
    A symmetrically balanced load H-bridge device according to any one of the preceding claims, comprising means for setting a reference potential equal to half of the High state (VBAT / 2) at the connection points (OUTO). , OUT1), on either side of the load (M), when each of said switches (HSO, HS1, LSO, LS1) is open.
    [5" id="c-fr-0005]
    5. H symmetrical load switching bridge device according to the preceding claim, wherein the means for setting the reference potential at the connection points (OUTO, OUT1), on either side of the load (M), consist of a resistive bridge and a push-pull driver (DO, D1), on either side of the load (M), each of said "push-pull" type drivers (DO , D1) being respectively connected to a connection point (OUTO, OUT1).
    [6" id="c-fr-0006]
    The symmetrical load switching H-bridge device according to any one of the preceding claims, wherein the reference intensity is equal to 100 μΑ.
    [7" id="c-fr-0007]
    A method of symmetric switching of a symmetrically balanced switching H-bridge device according to any one of claims 3 to 6, comprising the following steps, when the pulse generator is in a high state (VBAT) the first and fourth switches (HSO, LS1) being closed, so as to load the load (M) in the forward direction, and the current and voltage slope control means (HSO, HS1, LSO, LS1) of said first and fourth switches (HSO, LS1) ensuring that the sum of the potentials at the connection points (OUTO, OUT1) to the load (M), on either side of the load (M), is equal to a constant: i. when the pulse generator switches to a low state, the first and fourth switches (HSO, LS1) are open, the current and voltage slope control means (SHO, SH1, SLO, SL1) of said first and fourth switches (HSO, LS1) ensuring that the sum of the potentials at the connection points (OUTO, OUT1) at the load (M), on either side of the load (M), is equal to a constant, ii. when the four switches (HSO, HS1, LSO, LS1) are open, after a dead time, the second and third switches (HS1, LSO) are closed, so as to discharge the load (M), the independent comparators (CHO, CH1, CL0, CL1) comparing the intensity of the current flowing through each of the switches (HSO, HS1, LSO, LS1) to the reference intensity, iii. if the intensity of the current flowing through each of the switches (HSO, HS1, LSO, LS1) becomes lower than the reference intensity, the second and third switches (HS1, LSO) are open, the current slope control means and voltage (SHO, SH1, SLO, SL1) of said second and third switches (HS1, LSO) ensuring that the sum of the potentials at the connection points (OUTO, OUT1) at the load (M), on both sides of the the charge (M) is equal to a constant, iv. when the pulse generator switches to a new high state, if the second and third switches (HS1, LSO) have been opened in the previous step, step i. is again implemented, if not, the second and third switches (HS1, LSO) are open, the means for controlling the current and voltage slopes (SHO, SH1, SLO, SL1) of said second and third switches (HS1, LSO) ensuring that the sum of the potentials at the connection points (OUTO, OUT1) at the load (M), on either side of the load (M), is equal to a constant, then, after a dead time, step i. is again implemented.
    [8" id="c-fr-0008]
    8. A method of symmetric switching of an H-bridge device according to the preceding claim, comprising the following steps, when the pulse generator is in a high state (VBAT), the second and third switches (HS1, LSO). being closed, so as to load the load (M) in the opposite direction, and the means for controlling the current and voltage slopes (SH1, SLO) of said second and third switches (HS1, LSO) ensuring that the sum of the potentials at the connection points (OUTO, OUT1) to the load (M), on either side of the load (M), is equal to a constant: i. when the pulse generator switches to a low state, the second and third switches (HS1, LSO) are open, the current and voltage slope control means (SH1, SLO) of said second and third switches (HS1, LSO ) ensuring that the sum of the potentials at the connection points (OUTO, OUT1) at the load (M), on either side of the load (M), is equal to a constant, ii. when the four switches (HSO, HS1, LSO, LS1) are open, after a dead time, the first and fourth switches (HSO, LS1) are closed, so as to discharge the load (M), the independent comparators (CHO, CH1, CL0, CL1) comparing the intensity of the current flowing through each of the switches (HSO, HS1, LSO, LS1) to the reference intensity, iii. if the intensity of the current flowing through each of the switches (HSO, HS1, LSO, LS1) becomes lower than the reference intensity, the first and fourth switches (HSO, LS1) are open, the current slope control means and of voltage (SHO, SL1) of said first and fourth switches (HSO, LS1) ensuring that the sum of the potentials at the connection points (OUTO, OUT1) to the load (M), on either side of the load (M ), equal to a constant, iv. when the pulse generator switches to a new high state (VBAT), if the first and fourth switches (HSO, LS1) have been opened in the previous step, step i. is again implemented, if not, the first and fourth switches (HSO, LS1) are open, the means for controlling the current and voltage slopes (SHO, SL1) of said first and fourth switches (HSO, LS1) ensuring that the sum of the potentials at the connection points (OUTO, OUT1) at the load (M), on either side of the load (M), is equal to a constant, then, after a dead time, the step i . is again implemented.
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    同族专利:
    公开号 | 公开日
    CN108604872A|2018-09-28|
    FR3047619B1|2019-04-19|
    WO2017137692A1|2017-08-17|
    US20190044463A1|2019-02-07|
    CN108604872B|2022-01-25|
    US10734929B2|2020-08-04|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US5317245A|1992-10-29|1994-05-31|Mfm Technology, Inc.|Brushless DC motor control network|
    DE19927904A1|1999-06-18|2001-01-04|Bosch Gmbh Robert|Device for operating a load|
    US20070064460A1|2005-09-22|2007-03-22|Alon Siman-Tov|Apparatus and method for current control in h-bridge load drivers|FR3083874A1|2018-07-12|2020-01-17|Continental Automotive France|METHOD FOR DETECTING A SHORT CIRCUIT ON A LOAD CONTROLLED BY AN H-BRIDGE AND SYSTEM FOR CONTROLLING A LOAD|
    FR3083873A1|2018-07-12|2020-01-17|Continental Automotive France|METHOD FOR DETECTING AN OPEN CIRCUIT ON A LOAD CONTROLLED BY AN H-BRIDGE AND SYSTEM FOR CONTROLLING A LOAD|US5495155A|1991-06-28|1996-02-27|United Technologies Corporation|Device in a power delivery circuit|
    US5287046A|1992-05-13|1994-02-15|International Business Machines Corporation|Method and system for actuator control for direct access storage devices|
    US5428522A|1992-08-17|1995-06-27|Kaman Electromagnetics Corporation|Four quadrant unipolar pulse width modulated inverter|
    US6445530B1|1998-09-25|2002-09-03|Seagate Technology Llc|Class AB H-bridge using current sensing MOSFETs|
    JP2005269855A|2004-03-22|2005-09-29|Matsushita Electric Ind Co Ltd|Dc motor drive circuit|
    US7589487B2|2005-10-04|2009-09-15|Delphi Technologies, Inc.|Method of selectable simultaneous/sequential motor drive in a multiple drive circuit including failure detection|
    DE102010001622A1|2010-02-05|2011-08-11|Robert Bosch GmbH, 70469|Method for de-energizing field winding of hybrid-energized machine for supply of direct current systems in motor cars, involves increasing voltage at field winding around range of Zener voltage by voltage increasing arrangement|
    JP5908224B2|2011-07-05|2016-04-26|セミコンダクター・コンポーネンツ・インダストリーズ・リミテッド・ライアビリティ・カンパニー|H bridge drive circuit|
    FR3013919B1|2013-11-22|2016-01-08|Continental Automotive France|SHORT-CIRCUIT DETECTION IN A SWITCHING STRUCTURE|
    US9513653B2|2014-09-15|2016-12-06|Freescale Semiconductor, Inc.|Method and apparatus for control of a switched current circuit|
    CN105141303B|2015-08-31|2018-08-03|晶焱科技股份有限公司|Slope control circuit|
    US10461609B2|2016-10-04|2019-10-29|Infineon Technologies Ag|Multi-gate half-bridge circuit and package|US10819351B1|2019-05-28|2020-10-27|Texas Instruments Incorporated|Gate driver circuit with a closed loop overdrive generator|
    法律状态:
    2017-02-17| PLFP| Fee payment|Year of fee payment: 2 |
    2017-08-11| PLSC| Publication of the preliminary search report|Effective date: 20170811 |
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    2020-02-19| PLFP| Fee payment|Year of fee payment: 5 |
    2021-02-24| PLFP| Fee payment|Year of fee payment: 6 |
    2021-04-16| TP| Transmission of property|Owner name: CONTINENTAL AUTOMOTIVE FRANCE, FR Effective date: 20210309 Owner name: CONTINENTAL AUTOMOTIVE GMBH, DE Effective date: 20210309 |
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    2022-02-16| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1650968A|FR3047619B1|2016-02-08|2016-02-08|DEVICE AND METHOD FOR CHARGE SYMMETRIC SWITCHING IN AN H-BRIDGE|
    FR1650968|2016-02-08|FR1650968A| FR3047619B1|2016-02-08|2016-02-08|DEVICE AND METHOD FOR CHARGE SYMMETRIC SWITCHING IN AN H-BRIDGE|
    US16/072,960| US10734929B2|2016-02-08|2017-02-07|Device and method for symmetric load switching in an H bridge|
    PCT/FR2017/050275| WO2017137692A1|2016-02-08|2017-02-07|Device and method for symmetric load switching in an h bridge|
    CN201780010226.1A| CN108604872B|2016-02-08|2017-02-07|Apparatus and method for symmetric load switching in H-bridges|
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