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    Logic control system for inverter-driven motor
    101.
    发明授权
    Logic control system for inverter-driven motor 失效
    变频驱动电机逻辑控制系统

    公开(公告)号：US4259845A

    公开(公告)日：1981-04-07

    申请号：US75043

    申请日：1979-09-12

    Applicant: Dean K. Norbeck

    Inventor： Dean K. Norbeck

    IPC: F25B49/02 ,  G05B5/00 ,  H02P1/30 ,  H02P27/06 ,  F25B1/00 ,  H02P5/28

    CPC classification number: H02P27/06 ,  F25B49/025 ,  H02P1/30 ,  H02P27/047 ,  F25B2600/021 ,  H02P2201/03 ,  Y02B30/741

    Abstract: The logic control system of the invention regulates the frequency of operation of an inverter which drives an electric motor, and also regulates the level of the d-c bus voltage supplied to the inverter. This is accomplished by sensing the level of the bus voltage and the level of the current supplied to the motor, and comparing the sensed values to a reference or set point signal. The motor drives a compressor, and a capacity control system cooperates with the logic control system in the regulation of the compressor. The capacity control system provides signals, such as start/stop and inverter set point, to the logic control system to assist in regulating operation of the inverter which drives the compressor. In particular the logic control system includes a reference conductor on which a basic reference control signal is developed for use in controlling both the amplitude and the frequency of the a-c energy supplied by the inverter to the motor.

    Abstract translation: 本发明的逻辑控制系统调节驱动电动机的逆变器的运行频率，并且调节提供给逆变器的d-c总线电压的电平。 这是通过感测总线电压的电平和提供给电动机的电流的电平，并将感测的值与参考或设定点信号进行比较来实现的。 电机驱动压缩机，容量控制系统与压缩机调节中的逻辑控制系统配合使用。 容量控制系统向逻辑控制系统提供启动/停止和变频器设定点等信号，以帮助调节驱动压缩机的变频器的运行。 特别地，逻辑控制系统包括参考导体，基准参考控制信号被开发用于控制由逆变器提供给电动机的a-c能量的振幅和频率。

    Method of eliminating self oscillations of an induction motor powered from a frequency changer and means for effecting same
    102.
    发明授权
    Method of eliminating self oscillations of an induction motor powered from a frequency changer and means for effecting same 失效
    消除由变频器供电的感应电动机的自振动的方法及其实现方法

    公开(公告)号：US3935518A

    公开(公告)日：1976-01-27

    申请号：US494910

    申请日：1974-08-05

    Applicant: Vladimir Grigorievich Yatsuk ,  Vladimir Fedorovich Petrenko

    Inventor： Vladimir Grigorievich Yatsuk ,  Vladimir Fedorovich Petrenko

    IPC: H02P23/04 ,  H02P27/06 ,  H02P5/40

    CPC classification number: H02P27/06 ,  H02P23/04 ,  H02P2201/03 ,  H02P27/047

    Abstract: A method of eliminating self-oscillations of an induction motor powered from a thyristor frequency changer, differing from those known in the prior art in that it provides for forming a signal proportional to a first derivative of the low frequency component of the motor reactive current oscillations which signal is applied as a positive feedback, in sequence with a main control, signal to an output frequency control circuit of the thyristor frequency changer.A control system provided comprising a power supply and a power circuit energized by the former to produce an a.c. output voltage whose amplitude and frequency are proportionally regulated, and a control circuit energized by the power supply to control the power circuit. The latter circuit includes a three-phase rectifier bridge and an independent inverter. The control circuit includes respective means for controlling the amplitude and the frequency of the inverter output voltage. The latter means includes a frequency regulator, a controlled reference voltage circuit which determines the output frequency of the inverter under steady-state conditions. The improvement of the invention resides in that a feedback circuit is provided to produce a voltage proportional to the low-frequency component of the reactive current oscillations of the motor the frequency regulator being supplied with the reference voltage plus the feedback voltage, thus providing for control of the inverter output frequency under transient conditions.

    Abstract translation: 一种消除由晶闸管变频器供电的感应电动机的自振荡的方法，其与现有技术中已知的不同之处在于，其提供与电动机无功电流振荡的低频分量的一阶导数成比例的信号 该信号作为正反馈，依次用主控制信号施加到晶闸管变频器的输出频率控制电路。

    Motor control system with volts/hertz regulation
    103.
    发明授权
    Motor control system with volts/hertz regulation 失效
    具有电压/ HERTZ调节的电机控制系统

    公开(公告)号：US3584279A

    公开(公告)日：1971-06-08

    申请号：US3584279D

    申请日：1969-05-28

    Applicant: BORG WARNER

    Inventor： KRAUTHAMER STANLEY ,  LAMASTER DONALD M

    IPC: G05B13/02 ,  H02J20060101 ,  H02P20060101 ,  H02P5/00 ,  H02P13/00 ,  H02P27/06 ,  H02P5/36

    CPC classification number: H02P27/06 ,  H02P27/047 ,  H02P2201/03 ,  H02P2201/07

    Abstract: An AC motor is energized by the output voltage of an inverter which in turn receives a DC input voltage from a DC-to-DC converter. A combined oscillator-regulator circuit includes a first potentiometer for adjusting the desired volts/hertz ratio of the inverter output voltage, and a second potentiometer for regulating motor speed. The combined oscillator-regulator receives an output signal from the inverter for comparison against the desired volts/hertz ratio signal, and provides two control signals. The first control signal regulates the operation of the DC-to-DC converter, and the second control signal regulates the frequency of the inverter output voltage.

    APPARATUS AND METHOD FOR DRIVING A PERMANENT MAGNET MOTOR
    108.
    发明公开
    APPARATUS AND METHOD FOR DRIVING A PERMANENT MAGNET MOTOR 审中-公开

    公开(公告)号：US20230336101A1

    公开(公告)日：2023-10-19

    申请号：US18025332

    申请日：2020-09-08

    Applicant: Vestel Elektronik Sanayi ve Ticaret A.S.

    Inventor： Seyit YILDIRIM

    IPC: H02P21/00 ,  H02P21/22

    CPC classification number: H02P21/0089 ,  H02P21/22 ,  H02P2201/03 ,  H02P2207/05

    Abstract: There is provided a drive circuit (300) for a permanent magnet motor (311). The drive circuit (300) has a rectifier circuit constructed and arranged to convert a source alternating current (305) to a direct current, and a film capacitor (303) arranged in a path parallel with the rectifier circuit (307). The drive circuit (300) also has an inverter circuit (309) constructed and arranged to convert the direct current into a three-phase alternating current to drive the permanent magnet motor (311). Furthermore, the drive circuit (300) has a control circuit connected to the source alternating current (305) and the inverter circuit (309), the control circuit being constructed and arranged to modulate a d-axis current reference with the square of a cosine wave which is synchronised with a voltage angle of the source alternating current (305), wherein the modified d-axis current reference is provided as an input to the inverter circuit (309).

    Control Apparatus And Robot System
    109.
    发明公开
    Control Apparatus And Robot System 审中-公开

    公开(公告)号：US20230318507A1

    公开(公告)日：2023-10-05

    申请号：US18192766

    申请日：2023-03-30

    Applicant: SEIKO EPSON CORPORATION

    Inventor： Junpei NAKAYAMA

    IPC: H02P27/08 ,  H02P23/26

    CPC classification number: H02P27/08 ,  H02P23/26 ,  H02P2201/03 ,  H02P2201/11 ,  H02P2201/15

    Abstract: A control apparatus includes a drive circuit unit to which regenerative electric power is input, a discharge resistance unit parallel-coupled to the drive circuit unit, to which the regenerative electric power is input from the drive circuit unit, and, when a voltage value of the regenerative electric power exceeds a threshold value, consuming electric power, a second converter circuit unit parallel-coupled to a first converter circuit unit and converting and outputting an alternating current into a direct current, a step-down circuit unit stepping down and outputting a voltage of the current output from the second converter circuit unit, an energization control circuit unit actuated by the direct current and controlling the drive circuit unit, and a regenerative electric power supply unit having a regenerative diode coupled to the discharge resistance unit and outputting a direct current of the regenerative electric power to the step-down circuit unit.

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