Patent ID: 8786228
Filing Date: 2014-07-22
Classification: B62D,H02P,H03K

Abstract:
1. A controller for a power steering apparatus comprising: a motor supplying a steering assist force to said power steering apparatus for a vehicle; a motor driving member outputting a driving power to said motor; a battery supplying power voltage to said motor driving member; an ignition switch turning on or off said battery; a switching member mounted in a conducting path from said battery to said motor driving member; and a condenser mounted at an input side of said motor driving member; said switching member has two switching elements to turn on or off said conducting path by turning on or off according to a driving signal being input into a gate, and parasitic diodes mounted in parallel between a drain and a source of said switching elements, said switching elements are connected in series at the opposite direction respectively on said conducting path and are connected to said ignition switch; a voltage detecting member detecting output voltage from each of said switching elements; and a fault judging member judging faults of each of said switching elements and said parasitic diodes in accordance with each of said output voltages detected by said voltage detecting member.