| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a motor driving current variation, and torque drop and variation on the basis of a deviation between timing to reach a target current and a carrier period (control period) of PWM control when shifting to the PWM control after a motor driving current of a control target is increased to the target current of the PWM control, and then maintaining the driving current at the target current by the PWM control. <P>SOLUTION: An arithmetic section 41a and a correction section 41c of an arithmetic processing unit 41 derive and estimate timing at which a driving current is raised to a target current of the PWM control by electric conduction from an electric conduction start timing of an SR motor 1 as a control target, and then correct the electric conduction timing on the basis of a deviation between the carrier period and the timing at which the driving current is raised to the target current of the PWM control. <P>COPYRIGHT: (C)2012,JPO&INPIT |
