Patent ID: 6972501
Filing Date: 2005-12-06
Classification: B62D,H02K

Abstract:
1. An electric power steering device comprising: an electric motor which is driven by supply of current; a controller including a substrate on which drive devices working to drive said electric motor are connected electrically, the drive devices including a first drive device connected electrically between a power supply and said electric motor and a second drive device connected electrically between said electric motor and ground; power supply terminal joints which are provided on the substrate of said controller for receiving the current to be supplied to said electric motor, said power supply terminal joints including a first input terminal leading electrically to a power supply and a second input terminal connected electrically to ground; and motor terminal joints which are provided on the substrate of said controller, said motor terminal joints including a first output terminal leading to the first input terminal and a second output terminal leading to the second input terminal for outputting the current to said electric motor, wherein said first and second drive devices are mounted between said power supply terminal joints and said motor terminal joints, wherein said drive devices work to control a duty cycle of the current supplied to said electric motor, said drive devices including first switching transistors connected electrically to the power supply and second switching transistors connected electrically to ground, and wherein joints of the first and second switching transistors to the control substrate of said controller are all disposed between said power supply terminal joints and said motor terminal joints.