Patent ID: 9038764
Filing Date: 2015-05-26
Classification: B60K,B60L,B62D,Y02T

Abstract:
1. An electrical power steering apparatus including; a high voltage power source generating a high voltage of more than 100 volts; an electrical motor generating steering assist force presented to a steering mechanism of a vehicle; and a motor control circuit, said motor control circuit including: said converter division including a step down circuit reducing said high voltage of said high voltage power source to a low voltage lower than said high voltage, a low voltage charge device charged through said step down circuit, and a switch equipped to shut and connect a conduct between said low voltage charge device and said motor drive circuit; and said motor drive circuit is connected with said low voltage charge device, and is disconnected from a direct connection with said high voltage power source, when a collision of said vehicle occurs, so that steering assistance is still possible but a risk of electric shock to occupants of said vehicle is prevented.