Steering apparatus

Details Steering apparatus Steering apparatus

2006-12-26

2006-12-26

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Positional servo systems

Pulse-width modulated power input to motor

C318S811000, C318S607000, C318S078000, C318S807000, C701S041000, C180S443000

Reexamination Certificate

active

07154244

ABSTRACT:
Steering apparatus includes at least one motor for generating a steering assisting force in a direction to steer a steerable wheel, two drive circuits having respective switching elements for PWM-controlling the motor, and a controller for differentiating, between the drive circuits, a control frequency at which the switching element is switched on and off. The differentiated PWM switching timing can effectively reduce switching noise and magnetostrictive sound of the motor.

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