When an engine is to be restarted, a power-steering mechanism is reactivated when voltage fluctuation of a battery is equal to or less than a predetermined fluctuation range after startup of the engine has been initiated.

A power-assisted steering system includes: two or more current detectors that detects current flowing to two or more phases of a motor and outputs detected current values; a correcting unit that corrects the detected current values output from the current ...

A power-assisted steering system includes a current detector for detecting sequentially current flowing to a ground-side switching element in a lower arm by a detection resistor inserted into the lower arm not only in a time period when the switching eleme...