Steuereinrichtung für einen geschalteten Reluktanzmotor

摘要

An energization controller for an electric motor eliminates the possibility that a motor driver may be destroyed when the electric motor rotates in the opposite direction from its driving direction. The energization controller comprises energization circuits which are composed of an H type circuit together with an electric coil; a chopping control device for selectively performing a hard chopping mode of alternately repeating a switch-on operation of turning on both switching elements and a switch-off operation of turning off both the switching elements and a soft chopping mode of alternately repeating a switch-on operation of turning on both the switching elements and a singular-on operation of turning off one switching element and turning on the other switching element; a direction detection device for detecting a rotational direction of the motor; and a chopping mode control device for detecting whether or not the rotational direction coincides with a driving direction and for instructing the chopping control device to perform the hard chopping mode during when those directions do not coincide.