• 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:
    Apparatus for controlling operation of AC motor (1) has a rectifier (2) for rectifying AC power source (U, V, W,), a variable voltage- variable frequency inverter (5), a regenerative thyristor bridge circuit (3 sec ) and smoothing capacitor (C1). …<??>The apparatus also has switching transistors (TR1, TR2) through which the thyristors (S1 to S6) of thyristor bridge circuit (3 sec ) are connected between the rectifier (2) and inverter (5). …<??>Control circuitry (8 to 13) generates control signals (SG1 to SG6) for firing the thyristors (S1 to S6) and control signals (TRB1, TRB2) for controlling driving of the switching transistors (TR1, TR2) in synchronism with firing of the thyristors (S1 to S6) (to render transistors (TR1, TR2) non-conductive when any of thyristors (S1 to S6) are to commute). …<??>Braking energy is fed back to the AC power source through the bridge (3 sec ).
    公开号:SU1421270A3
    申请号:SU802963346
    申请日:1980-08-18
    公开日:1988-08-30
    发明作者:Кавада Сигеки；Исида Хироси
    申请人:Фудзицу Фанук Лимитед (Фирма)；
    IPC主号:
    专利说明:

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    The invention relates to electrical engineering and can be used in electric drives of lifting mechanisms.
    The purpose of the invention is to expand the range of frequency control of rotation due to the effectiveness of braking.
    The drawing shows a diagram of the device.
    The device for controlling the asynh-I oHHbiM electric motor 1 contains a two-phase bridge relay 2, the course of which is equipped with switches for connecting to a power source and connected to the input of a three-phase bridge switch 3, made on thyristors, a frequency converter 4, made in the form of series-connected transistor and diode three-phase rectifying mosgov 5 and 6, whose inputs are connected; with the phases of the stator winding, and the output pins are shunted by a smoothing capacitor 7 and connected to the output Dami three-phase bridge terminal mitel 2 and through the first 8 and second 9 transistors, respectively, are connected to the output of the three-phase bridge switch 3, the input of which is connected to the input of a three-phase rectifying bridge 10, each arm of which is filled in the form of series-connected diode 11 and an LED 12, six phototransistors 13, the emitters of which are combined and provided with an outlet for grounding, the collector of each phototransistor through an inverter 14 is connected to the first input of the corresponding AND 15 logic element and to the corresponding input of the logic element OR 16 with six inputs, the output of the logic element OR 16 is connected to the input of the first multivibrator 17, the output of which is connected to the base terminals of the first 8 and second 9 transistors and to the input of the second multivibrator 18, the output of which is connected to the common connection point of the second the inputs of all six logical elements 15, the outputs of which are connected to the control electrodes of the thyristors of the three-phase bridge switch 3,
    The device works as follows
    The electric motor 1 is connected to the power source via a three-phase bridge drive 2, three-phase
    bridge switch 3 and frequency converter 4, the output frequency of which varies with changes in the opening angles of the three-phase rectifier bridge 5 anzistors.
    When it is necessary to reduce the frequency of rotation of the electric motor 1 in accordance with the load, the output frequency and voltage of the frequency converter decreases as the frequency of rotation of the electric motor at this moment is higher than the synchronous frequency
    5 rotation, which corresponds to the new operating frequency. As a result, the electric motor operates in the area where the slip is negative, i.e. in the field of regenerative braking.
    0 A three-phase rectifying bridge 10 is connected to the phases of the power supply. With this connection, the LEDs of bridge 10 and the thyristors of the switch 3 are supplied with the same 5 Hbie voltage; In this case, the current flows only through the LED to which the maximum phase voltage is applied and this diode emits a light signal. The LEDs operate in series in accordance with the change in phase voltages from the LED. Yes, the corresponding phototransistor 13 is triggered, the signal from which is inverted by the inverters 14. Then, through the logic elements AND 15, the logical element OR 16, the signal goes to the multivibrator 17, and the pulse is output every time the phototransistors 13 are triggered. The multivibrator 17 is triggered by the leading edge of each incoming signal and remains in a conducting state only for a fixed period of time, then the multivibrator 17 returns to the initial state. This pulse sequence is fed as the control signals to the transistors 8 and 9. In addition, this sequence of pulses is fed to the multivibrator 18 and through
    0 logic element AND 15 on the control unit, the thyristor electrodes of the switch 3. Thus, control is supplied to those thyristors with the largest interfacial voltage and through
    5 which takes place the recovery of energy from the engine.
    Thus, all switch thyristors are turned on by setting
    0
    five
    0
    five
    both transistors 8 and 9 are non-conducting by supplying zero potential pulses. Then, in successive intervals, during which the transistors 8 and 9 are locked, control signals are sent to the thyristors of the switch 3. As a result, the regeneration current flows between the two phases of the power supply having the greatest value
    Thus, the proposed device allows the use of regenerative braking of an electric motor to change the speed control range.
    Formula inventions
    An asynchronous motor control device containing a three-phase bridge rectifier, the input of which is connected to the power supply and connected to the input of a three-phase bridge switch made on the thyristors, a frequency converter which input is intended to be connected to the stator winding phases, and the outputs are connected with the output pins of the three-phase bridge and the miter and through the first and second transistors, respectively, are connected to the output pins of the three-phase bridge a switch, a smoothing capacitor, characterized in that, for the purpose of expansion ranging chastoty- rotation by increasing the efficiency of deceleration
    three-phase rectifier bridge, each arm of which is made in the form of a series-connected diode and LED, six phototransistors, six inverters, six AND gates, a logical element OR with six inputs, two multivibrators, the frequency converter is made in the form of series-connected transistor and diode three-phase rectifying bridges, the output pins of which are combined, form the output 5 pins of the frequency converter and are shunted by smoothing condensate rum, a three-phase rectifying bridge input is connected to a three-phase bridge rectifier input, each three-phase rectifying bridge photodiode is connected to a corresponding phototransistor, the emitters of six phototransistors are combined and equipped with a grounding switch, the collector of each phototransistor through the inverter is connected to the first input of the corresponding log and to the corresponding input of the logical element SHS, the output of which through the first multivibrator is connected to the base terminals of the first and second tran and with the input of the second multivibrator, the output of which is connected to the common connection point of the second inputs of all six logic elements I, the outputs of which are connected to the control electrodes of the thyristors of the three-phase bridge switch.
    0
    five
    0
    five
    权利要求:
    Claims (1)
    [1]
    Form of invention: A device for controlling an asynchronous electric motor, comprising a three-phase bridge rectifier, the input of which is connected with leads for connecting to a power source and connected to the input of a three-phase bridge switch made on thyristors, a frequency converter, the input of which is designed to connect to the phases of the stator winding, and the output terminals are connected to the output terminals of a three-phase bridge rectifier and, through the first and second transistors, respectively, are connected to the output terminals of the tre phase bridge commutator, smoothing capacitor, characterized in that, in order to expand the range of regulation of frequency-rotation due to increased braking efficiency, a three-phase rectifier bridge is introduced into it, each arm of which is made in the form of a series-connected diode and LED, six phototransistors, six inverters , six logical elements AND, a logical element OR with six inputs, two multivibrators, the frequency converter is made in the form of a transistor connected in series o and diode three-phase rectifier bridges, the output terminals of which are combined, form the output 15 terminals of the frequency converter and shunted by a smoothing capacitor, the input of the three-phase rectifier bridge is connected to the input of the three-phase bridge rectifier, each 2Q photodiode of the three-phase rectifier bridge is connected to the corresponding phototransistor, the emitters of the six phototransistors are combined and equipped with grounding terminal, collector
    25 of each phototransistor through an inverter is connected to the first input of the corresponding logical element AND and to the corresponding input of the logical element OR, the output of which
    30 through the first multivibrator is connected to the base terminals of the first and second transistors and to the input of the second multivibrator, the output of which is connected to a common connection point of the second inputs of all six logical elements And, the outputs of which are connected to the control electrodes of the thyristors of the three-phase bridge switch.
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    同族专利:
    公开号 | 公开日
    JPS5840919B2|1983-09-08|
    EP0026038B1|1984-03-21|
    US4353023A|1982-10-05|
    EP0026038A1|1981-04-01|
    JPS5629480A|1981-03-24|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2443025A1|1974-09-09|1976-03-25|Siemens Ag|CIRCUIT ARRANGEMENT WITH AN INVERTER|
    DE2455765C2|1974-11-26|1983-11-10|BM-Elektronik Humbert Münzing, 7433 Dettingen|Device for stepless control or regulation of the speed and / or the torque of a three-phase asynchronous machine|
    US3971972A|1975-03-14|1976-07-27|Allis-Chalmers Corporation|Transistor inverter motor drive having voltage boost at low speeds|
    DE2624597C2|1976-05-28|1983-09-29|Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt|Control of three-phase motors fed by a converter arrangement in the event of dynamic operating changes|
    US4139885A|1977-06-20|1979-02-13|Borg-Warner Corporation|Fault protection circuit|
    JPS607467B2|1978-06-30|1985-02-25|Matsushita Electric Ind Co Ltd|JPH0348754B2|1981-06-16|1991-07-25|Fanuc Ltd|
    JPH0132760B2|1981-06-16|1989-07-10|Fanuc Ltd|
    JPS5836867A|1981-08-25|1983-03-03|Mitsubishi Electric Corp|Operating device in case of emergency of alternating current elevator|
    JPS6320116B2|1981-08-25|1988-04-26|Mitsubishi Electric Corp|
    JPH0231594B2|1982-03-09|1990-07-13|Mitsubishi Electric Corp|
    JPH0728553B2|1982-03-31|1995-03-29|株式会社日立製作所|Motor drive circuit|
    US4447868A|1982-04-05|1984-05-08|General Electric Company|Regenerative rectifier circuit|
    US4449176A|1982-05-26|1984-05-15|General Electric Company|Single phase regeneration with a polyphase rectification power circuit|
    JPH031915B2|1982-05-26|1991-01-11|Fanuc Ltd|
    FI823519L|1982-10-15|1984-04-16|Elevator Gmbh|FYRKVADRANTISK NYTTOBROMSANDE ELMOTORSTYRNING|
    US4620272A|1984-08-31|1986-10-28|Imec Corporation|Line-regenerative motor controller with current limiter|
    US4720776A|1984-12-04|1988-01-19|Square D Company|DC bus shorting apparatus and method for polyphase AC inverter|
    FI75700C|1986-05-21|1988-07-11|Kone Oy|FOERFARANDE OCH ANORDNING FOER STYRNING AV EFFEKT VID EN LIKSPAENNINGSKAELLA.|
    US4788635A|1987-02-04|1988-11-29|Westinghouse Electric Corp.|Converter system combining a two-quadrant voltage-source rectifier and a four-quadrant voltage-source inverter, and a motor drive embodying the same|
    US4959602A|1989-06-02|1990-09-25|Westinghouse Electric Corp.|Ac motor drive with improved voltage-source inverter|
    CH688842A5|1994-03-14|1998-04-15|Landis & Gyr Tech Innovat|Means for controlling the motor of the fan of a fan burner.|
    JPH0866056A|1994-08-24|1996-03-08|Mitsubishi Electric Corp|Inverter apparatus|
    KR20040034908A|2002-10-17|2004-04-29|엘지전자 주식회사|Driving apparatus of three phase induction motor|
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    US7116067B2|2004-09-21|2006-10-03|Honeywell International Inc.|Power converter controlling apparatus and method providing ride through capability during power interruption in a motor drive system|
    US8098031B2|2006-11-28|2012-01-17|Baumuller Nurnberg Gmbh|Active brake unit|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP54104443A|JPS5840919B2|1979-08-16|1979-08-16|
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