| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a controller for brushless motor which can lighten the load of CPU, and also can reduce the cost. <P>SOLUTION: The controller 10 is equipped with a current control unit 14 which computes a motor current by current control based on the speed ω, the current command i* computed based on a speed command, and the total current of DC, and a control variable converter 16 which computes a motor current im and a control variable in a sine wave form geared to each phase based on an angle θ. Furthermore, the controller 10 is equipped with a PWM converter 18 which generates the PWM signals Su, Sv, and Sw of PWM based on the control variable. The current control unit 14 performs current control in cycles slower than the carrier cycle of PWM. <P>COPYRIGHT: (C)2009,JPO&INPIT |
