发明名称 SAFETY INTERLOCK AND PROTECTION CIRCUIT FOR PERMANENT MAGNET MOTOR DRIVE
摘要 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.
申请公布号 WO2006088821(A3) 申请公布日期 2007.04.12
申请号 WO2006US05092 申请日期 2006.02.14
申请人 INTERNATIONAL RECTIFIER CORPORATION;GALLI, GIOVANNI;TAKAHASHI, TOSHIO 发明人 GALLI, GIOVANNI;TAKAHASHI, TOSHIO
分类号 H02P3/00;H02M5/40;H02P27/00 主分类号 H02P3/00
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