• 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:
    A dodecaped static electric rectifier transformer (1) comprising a transformer (4) and a first and a second six-phase rectifier circuits (5, 6) for coupling to a load (3), the transformer (4) having a primary circuit (4) 10) having three primary coils (12) arranged in a star configuration and a secondary circuit (11) having three first secondary coils (13) and three second secondary coils (14) distinct from the first secondary coils (13). The secondary circuit (11) of the transformer (4) comprises a loop of six secondary coils (13 and 14) formed by an electrical connection of the first three secondary coils (13) with the three second secondary coils (14) of the secondary circuit (11). ).
    公开号:FR3041833A1
    申请号:FR1559124
    申请日:2015-09-28
    公开日:2017-03-31
    发明作者:Pierre Henrard
    申请人:Labinal Power Systems SAS；
    IPC主号:
    专利说明:

    BACKGROUND OF THE INVENTION The invention relates to a dodecaphase static electric rectifier transformer.
    An electrical transformer is an electrical machine having a primary circuit and a secondary circuit. The transformer makes it possible to modify the voltage and current intensity values delivered by a source of alternating electrical energy to the primary circuit of the transformer.
    Usually on board aircraft when it is necessary to convert a three-phase AC voltage into a DC voltage by providing galvanic isolation, a 12-phase pulsed stator transformer, also known as a TRU 12 tap, is used.
    In a static transformer, energy is transferred from the primary circuit to the secondary circuit via a magnetic circuit formed by the transformer casing. These two circuits are then magnetically coupled which allows for a galvanic isolation between the two circuits.
    As illustrated in FIG. 1, the generally used 12-dc rectifier transformers consist of a transformer 40 followed by two hexaphase rectifiers 50 and 60 each formed by a bridge of six diodes 70 and coupled to a load 3 via two inductors. C. The transformer 40 comprises a primary circuit 110 having three primary coils 120 mounted in a star and coupled to the supply network 2 and two secondary circuits 111 and 112.
    The first secondary circuit 111 comprises three first secondary coils 130 mounted in a star and whose free terminals 130b of the coils 130 are each coupled to a branch 50a, 50b, 50c of the first hexaphase rectifier 50.
    The second secondary circuit 112 comprises three second secondary coils 140 mounted in a triangle, the three nodes 140b of the triangles being each coupled to a branch 60b of the second hexaphase rectifier 60.
    This topology meets the expected network quality requirements for aeronautical power grids.
    In such an assembly, the secondary single voltages of the transformer are phase shifted by 30 °, ie π / 6. Because of this phase shift of 30 ° between the secondary single voltages, there is a phase shift of 30 ° between the two secondary line currents.
    If we call the transformation ratio between the primary winding star and the secondary star and m the transformation ratio between the primary winding star and the secondary triangle, then we can demonstrate who! there is a simple relation between m and m 'for the editing to work: m = V3m'.
    The current flowing in the secondary windings can be determined simply. For the delta secondary, there is a relationship between the secondary line currents and the winding currents. This relation is valid temporally and one can write:
    With J2a / J2b / J2c the currents flowing respectively in the three second secondary coils 140 mounted in a triangle, and I2a, 12b, 12c the currents respectively delivered to each of the three branches 60a, 60b, 60c of the second rectifier circuit 60 to which the second coils side-mounted magnets 140 are coupled as shown in FIG.
    The 12-phase rectifier transformer converts the AC three-phase voltages, for example of 115 V or 230 V rms voltage, into a DC voltage of 28 V or other for example. This transformation is achieved thanks to the transformer and the two hexaphase rectifiers.
    There is currently no simple, reliable solution based on twelve-phase rectifier transformer to further improve the quality of the power grid.
    OBJECT AND SUMMARY OF THE INVENTION The aim of the invention is to provide an alternative configuration of the secondary circuit of the transformer making it possible to improve the quality of the electrical circuit by minimizing or even eliminating the first frequencies.
    current harmonics of the power supply network, thus relieving electrical generators and improving the overall power factor of the power grid.
    The goal is also to offer a reliable alternative solution, as simple as possible, and the least expensive with a power density at least equivalent to the equipment currently installed on an aircraft.
    An object of the invention proposes a dodecaped static electric rectifier transformer comprising a transformer, and a first hexaphase rectifier circuit and a second hexaphase rectifier circuit intended to be coupled to a load, the transformer comprising a primary circuit having three primary coils disposed according to a star configuration and a secondary circuit having three first secondary coils and three second secondary coils distinct from the first secondary coils.
    According to a general characteristic of the invention, the secondary circuit of the transformer comprises a loop of six secondary coils formed by an electrical connection of the first three secondary coils with the three second secondary coils of the secondary circuit.
    The secondary circuit of the transformer thus proposes an alternative configuration of the secondary circuit of a transformer having a single secondary loop formed by the six coils.
    This configuration also makes it possible to provide an alternative conversion solution-continuous as simple as possible and the least expensive, with a power density at least equivalent to equipment now installed on an aircraft.
    According to a first aspect of the electric rectifier transformer, each second secondary coil of the transformer is connected between two first secondary coils and each first secondary coil is connected between two second secondary coils.
    Thus the hexagonal secondary winding of the secondary circuit is functionally equivalent to two nested triangular windings. This arrangement makes it possible at least to supply voltages of the same value at the output, and thus to deliver voltages of the same value to the first and second rectifier circuits.
    According to a second aspect of the electric rectifier transformer, the first secondary coils of the transformer have a first winding direction and the second secondary coils have a second winding direction opposite to the first winding direction.
    The opposition of the winding directions of the first and second secondary coils in addition to their alternation makes it possible to improve the quality of the electrical circuit by minimizing or even eliminating the first harmonic frequencies of the electricity supply network, thus relieving the electric generators and improving the overall power factor of the power grid.
    According to a third aspect of the electric rectifier transformer, the first three secondary coils have a first dimension and the three second secondary coils have a second dimension distinct from the first dimension, the first and second dimensions being chosen so that the three voltages measured between two output terminals of the first secondary coils have a phase shift of 30 ° with the three voltages measured between two output terminals of second secondary coils.
    In order to meet the quality requirements of the electrical network on board an aircraft, the phase difference between the two triangles formed by the hexagonal secondary circuit must be 30 °, ie π / 6, as for a conventional rectifier transformer.
    The phase shift of 30 ° between the two equivalent triangular secondary circuits makes it possible to meet the current harmonics requirements required by the aeronautical standards.
    This sizing of the first and second secondary coils also makes it possible to configure the transformer to obtain a phase shift of 15 ° and 45 ° between the secondary voltages measured on the secondary circuits and the primary voltages measured on the primary circuit.
    According to a fourth aspect of the electric rectifier transformer, the winding of each secondary coil of the transformer extends from a first electrical connection terminal to a second electrical connection terminal, the second terminals of the first and second coils being electrically connected to the first hexaphase rectifier circuit and the first terminals of the first and second coils being electrically connected to the second hexaphase rectifier circuit.
    This arrangement makes it possible to deliver three first amplitude-identical three-phase voltages to the first rectifier circuit and three identical amplitude-identical three-phase voltages to the second rectifier circuit, the six voltages being identical in amplitude.
    Another object of the invention proposes an electrical voltage conversion system comprising at least one electrical rectifying transformer as defined above.
    Yet another object of the invention proposes an aircraft comprising at least one electrical voltage conversion system as defined above.
    Brief description of the drawings. The invention will be better understood on reading the following, by way of indication but not limitation, with reference to the accompanying drawing in which: - the single figure 1, already presented, illustrates a rectifying transformer according to the state of the art; FIG. 2 schematically shows a rectifying transformer according to one embodiment of the invention; FIG. 3 schematically illustrates the transformer of the rectifying transformer of FIG. 2.
    Detailed description of embodiments
    FIG. 2 schematically shows an electrical system comprising a dodecaped electric rectifier transformer 1 according to one embodiment of the invention. The rectifier transformer 1 is coupled to an electrical network 2 at the input and to a load 3 at the output via interphase chokes 8 and 9.
    The rectifier transformer 1 comprises a transformer 4, a first hexaphase rectifier 5 and a second hexaphase rectifier 6.
    Each hexaphase rectifier 5 and 6 is formed by a bridge of six diodes 7 mounted in three branches 5a, 5b, 5c and 6a, 6b, 6c of two diodes 7 mounted in the same direction. Each branch 5a, 5b, 5c and 6a, 6b, 6c of a hexaphase rectifier 5 and 6 comprises an input terminal 25a, 25b, 25c and 26a, 26b, 26c disposed between the two diodes 7 of the branch 5a, 5b , 5c or 6a, 6b, 6c so that a first diode 7 is passing for a positive current flowing in the branch 5a, 5b, 5c or 6a, 6b, 6c while the second diode 7 is blocking and, conversely, that the second diode 7 is conducting for a negative current flowing in the branch 5a, 5b, 5c or 6a, 6b, 6c while the first diode 7 is blocking.
    Each of the two rectifiers 5 and 6 is coupled to the output 3 via one of the two interphase chokes 8 and 9.
    The transformer 4 comprises a primary circuit 10 and a secondary circuit 11.
    The primary circuit 10 is formed of three primary coils 12 mounted in a star. Each primary coil 12 of the primary circuit 10 thus has a first terminal 12a coupled to the two other primary coils 12 and a second terminal 12b distinct from the first terminal 12a and electrically connected to one of the phases 2a, 2b, 2c of the power supply network. 2. The second terminal 12b of each primary coil 12 is connected to a phase, 2a for example, distinct from the phases, 2b and 2c for the example mentioned, to which are connected the second terminals 12b of the two other primary coils 12.
    The secondary circuit 12, shown in more detail in FIG. 3, forms a loop of six secondary coils 13 and 14. The loop more particularly comprises three first secondary coils 13 and three second secondary coils 14.
    The first three secondary coils 13 have the same first dimension and are wound in the same direction. The three second secondary coils 14 have the same second dimension different from the first dimension and the same second winding direction different from the first winding direction.
    Since a coil has only two possible winding directions, the second winding direction is opposite to the first winding direction. The winding direction of the coils 13 and 14 is shown in Figure 3 in a conventional manner using a point in a circle to indicate the first direction of winding and using a cross in a circle to indicate the second winding direction.
    Thus, if it is considered that each secondary coil 13 and 14 comprises a winding start terminal 15 and a winding end terminal 16, the secondary windings 13 or 14 are wound from the winding start terminal 15 to the winding terminal 15. winding terminal 16, as shown in Figure 3, the secondary circuit 12 comprises three first nodes 17 to each of which are coupled a winding start terminal 15 of a first secondary coil 13 and a start terminal of winding 15 of a second secondary coil, and three second nodes 18 to each of which are coupled a winding end terminal 16 of a first secondary coil 13 and a winding end terminal 16 of a second secondary coil .
    The first three nodes 17 are electrically connected each to a separate branch 25a, 25b, 25c of the first rectifier circuit 5.
    The three second nodes 18 are each electrically connected to a separate branch 26a, 26b, 26c of the second rectifier circuit 6.
    The first and second secondary coils 13 and 14 respectively have a first and second dimensioning chosen to have a phase shift of 30 ° between the two secondary voltages and 15 ° and 45 ° between the secondary voltages and the primary voltages, to be in phase with the fundamental frequencies of the primary currents.
    The transformation ratios of the rectifier transformer 1 with respect to a known rectifier transformation having a secondary having three secondary coils in the form of a triangle and three secondary coils in a star as shown in FIG. 1 are the following:
    With the transformation ratio between the star primary winding and the secondary star of a conventional rectifier transformer as shown in Figure 1, mi the transformation ratio between the star primary winding and the winding presented by the long side of the transformer transformer hex 1, that is to say with the
    first secondary coils 13, and m2 the transformation ratio between the star primary winding and the winding presented by the short side of the hexagon of the rectifying transformer 1, that is to say with the second secondary coils 14.
    The rectifying transformer 1 according to the invention, when used in parallel with a rectifying transformer comprising two secondary circuits as shown in FIG. 1 and of equivalent power, makes it possible to minimize or even cancel the current harmonics eleven and thirteen of the network thus constituted.
    权利要求:
    Claims (7)
    [1" id="c-fr-0001]
    1. Diodecaphase static electric rectifying transformer (1) comprising a transformer (4) and first and second hexaphase rectifier circuits (5, 6) for coupling to a load (3), the transformer (4) having a primary circuit (10) having three primary coils (12) arranged in a star configuration and a secondary circuit (11) having three first secondary coils (13) and three second secondary coils (14) distinct from the first secondary coils (13), characterized in that the secondary circuit (11) of the transformer (4) comprises a loop of six secondary coils (13 and 14) formed by an electrical connection of the first three secondary coils (13) with the three second secondary coils (14) of the circuit secondary (11).
    [2" id="c-fr-0002]
    2. An electric rectifier transformer (1) according to claim 1, wherein each second secondary coil (14) of the transformer (4) is connected between two first secondary coils (13) and each first secondary coil (13) is connected between two seconds. secondary coils (14).
    [3" id="c-fr-0003]
    3. Electrical rectifier transformer (1) according to one of claims 1 or 2, wherein the first secondary coils (13) of the transformer (4) have a first winding direction and second secondary coils (14) have a second winding direction opposite the first direction of winding.
    [4" id="c-fr-0004]
    4. Electrical rectifier transformer (1) according to one of claims 1 to 3, wherein the first three secondary coils (13) have a first dimension and the three second secondary coils (14) have a second dimension distinct from the first dimension the first and second dimensions being chosen so that the three voltages measured between two output terminals of the first secondary coils (13) have a phase shift of 30 ° with the three voltages measured between two output terminals of second secondary coils (14) .
    [5" id="c-fr-0005]
    Electric rectifier transformer (1) according to one of claims 1 to 4, wherein the winding of each secondary coil (13, 14) of the transformer (4) extends from a first electrical connection terminal (15). ) to a second electrical connection terminal (16), the second terminals (16) of the first and second coils (13, 14) being electrically connected to the first hexaphase rectifier circuit (5) and the first terminals (15) of the first and second coils (13, 14) being electrically connected to the second hexaphase rectifier circuit (6).
    [6" id="c-fr-0006]
    Electrical voltage conversion system comprising at least one electric rectifier transformer (1) according to one of claims 1 to 5.
    [7" id="c-fr-0007]
    Aircraft comprising at least one electric voltage conversion system according to claim 6.
    类似技术:
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    同族专利:
    公开号 | 公开日
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    CN108141128A|2018-06-08|
    WO2017055739A9|2017-12-21|
    EP3357151B1|2021-01-06|
    CN108141128B|2020-06-09|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4255784A|1979-11-08|1981-03-10|Westinghouse Electric Corp.|Transformer-rectifier apparatus|
    US6198647B1|2000-07-28|2001-03-06|Rockwell Technologies, Llc|Twelve-phase transformer configuration|
    WO2012116263A1|2011-02-24|2012-08-30|Crane Electronics, Inc.|Ac/dc power conversion system and method of manufacture of same|FR3109678A1|2020-04-27|2021-10-29|Renault S.A.S|Battery charger for motor vehicle, vehicle and associated operating method|US8299732B2|2009-01-15|2012-10-30|Rockwell Automation Technologies, Inc.|Power conversion system and method|
    US9154048B2|2013-04-23|2015-10-06|Yaskawa America, Inc.|Balanced flux isolation transformer based eighteen pulse rectification scheme for use with variable frequency drives|US10689999B2|2018-02-22|2020-06-23|Ge Aviation Systems, Llc|Power generation system|
    US20200052631A1|2018-08-13|2020-02-13|Hamilton Sundstrand Corporation|Electric system architecture with a permanent magnet generator and interleaved active rectifiers|
    US10651770B2|2018-08-29|2020-05-12|Hamilton Sundstrand Corporation|Direct current voltage regulation of a six-phase permanent magnet generator|
    US10778127B2|2018-09-10|2020-09-15|Hamilton Sundstrand Corporation|Direct current voltage regulation of permanent magnet generator|
    US10855216B2|2018-09-10|2020-12-01|Hamilton Sundstrand Corporation|Voltage regulation of multi-phase permanent magnet generator|
    FR3089713B1|2018-12-05|2020-12-25|Safran Electrical & Power|Electric filtering system of an intelligent electric motor with decoupled multi-windings and associated intelligent electric motor.|
    法律状态:
    2016-09-14| PLFP| Fee payment|Year of fee payment: 2 |
    2017-03-31| PLSC| Publication of the preliminary search report|Effective date: 20170331 |
    2017-05-04| PLFP| Fee payment|Year of fee payment: 3 |
    2018-08-17| CA| Change of address|Effective date: 20180717 |
    2018-08-17| CD| Change of name or company name|Owner name: SAFRAN ELECTRICAL & POWER, FR Effective date: 20180717 |
    2018-08-22| PLFP| Fee payment|Year of fee payment: 4 |
    2019-08-20| PLFP| Fee payment|Year of fee payment: 5 |
    2020-08-19| PLFP| Fee payment|Year of fee payment: 6 |
    2021-08-19| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1559124A|FR3041833B1|2015-09-28|2015-09-28|TRANSFORMER RECTIFIER DODECAPHASE|FR1559124A| FR3041833B1|2015-09-28|2015-09-28|TRANSFORMER RECTIFIER DODECAPHASE|
    EP16785235.9A| EP3357151B1|2015-09-28|2016-09-28|Twelve-phase transformer-rectifier|
    CN201680060884.7A| CN108141128B|2015-09-28|2016-09-28|Twelve-phase transformer rectifier|
    PCT/FR2016/052459| WO2017055739A1|2015-09-28|2016-09-28|Twelve-phase transformer-rectifier|
    US15/763,621| US10608523B2|2015-09-28|2016-09-28|12-phase transformer rectifier|
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