POWER CONVERSION DEVICE, ELECTRIC POWER STEERING SYSTEM, ELECTRIC VEHICLE, ELECTRONIC CONTROL THROTTLE, AND ELECTRIC BRAKE

摘要

The first purpose of this invention is to increase its reliability, extends service life, reduces size it is meant that when an error occurs, disconnect failure phase connects driving circuit to be driven to motor and realization high-speed protection military operation. Therefore, according to the present invention, it is connected to each phase and four phase of neutral point or threephase motor in power inverter, semiconductor element is used as a kind of means, is driven. for disconnecting phase line failure and connection driving circuit and motorFurther, when above-mentioned tool is to be by semiconductor, the second object of the present invention, even if working as, in addition to the MOSFETs of short-circuit failure constitutes inverter, the phase of any phase output line that ground/power supply breaks down, interrupt output carries out regenerative braking without allowing motor. Therefore, according to the present invention, diodes in parallel connection thyristor directional traffic power source and ground between current path do not formed and in one direction between current path and power supply and motor between current path machine winding do not formed with ground.