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    • 1. 发明授权
    • Safety interlock and protection circuit for permanent magnet motor drive
    • 永磁电机驱动安全联锁和保护电路
    • US07227331B2
    • 2007-06-05
    • US11352719
    • 2006-02-13
    • Giovanni GalliToshio Takahashi
    • Giovanni GalliToshio Takahashi
    • H02P3/00
    • D06F37/42H02P25/024H02P29/0241
    • A circuit for protecting against controller failure wherein the controller provides control signals for controlling a DC to AC inverter fed by a DC bus and driving a permanent magnet motor, the circuit comprising a first circuit for monitoring the DC bus voltage and, in the event the DC bus voltage exceeds a first threshold due to a counter EMF generated by the motor, for producing a signal to the controller to provide a switch state to the inverter whereby the counter EMF is dissipated substantially in a motor circuit resistance of the permanent magnet motor as a result of a short circuit condition provided by the switch state of the inverter, thereby preventing the DC bus voltage of the inverter from exceeding the first threshold and causing the permanent magnet motor speed to be reduced.
    • 一种用于防止控制器故障的电路,其中所述控制器提供用于控制由DC总线馈送的DC到AC逆变器并驱动永磁电动机的控制信号,所述电路包括用于监视DC总线电压的第一电路, 直流母线电压由于电动机产生的反电动势而超过第一阈值,用于向控制器产生信号以向变频器提供开关状态,从而使逆电动势基本上以永磁电动机的电动机回路电阻耗散 是由逆变器的开关状态提供的短路状态的结果,从而防止逆变器的直流母线电压超过第一阈值,并且使永磁电动机的速度降低。
    • 2. 发明申请
    • Safety interlock and protection circuit for permanent magnet motor drive
    • 永磁电机驱动安全联锁和保护电路
    • US20060181239A1
    • 2006-08-17
    • US11352719
    • 2006-02-13
    • Giovanni GalliToshio Takahashi
    • Giovanni GalliToshio Takahashi
    • H02P21/00
    • D06F37/42H02P25/024H02P29/0241
    • A circuit for protecting against controller failure wherein the controller provides control signals for controlling a DC to AC inverter fed by a DC bus and driving a permanent magnet motor, the circuit comprising a first circuit for monitoring the DC bus voltage and, in the event the DC bus voltage exceeds a first threshold due to a counter EMF generated by the motor, for producing a signal to the controller to provide a switch state to the inverter whereby the counter EMF is dissipated substantially in a motor circuit resistance of the permanent magnet motor as a result of a short circuit condition provided by the switch state of the inverter, thereby preventing the DC bus voltage of the inverter from exceeding the first threshold and causing the permanent magnet motor speed to be reduced.
    • 一种用于防止控制器故障的电路,其中所述控制器提供用于控制由DC总线馈送的DC到AC逆变器并驱动永磁电动机的控制信号,所述电路包括用于监视DC总线电压的第一电路, 直流母线电压由于电动机产生的反电动势而超过第一阈值,用于向控制器产生信号以向变频器提供开关状态,从而使逆电动势基本上以永磁电动机的电动机回路电阻耗散 是由逆变器的开关状态提供的短路状态的结果,从而防止逆变器的直流母线电压超过第一阈值,并且使永磁电动机的速度降低。