| 摘要 |
<p>PCT No. PCT/JP89/00428 Sec. 371 Date Oct. 2, 1989 Sec. 102(e) Date Oct. 2, 1989 PCT Filed Apr. 21, 1989 PCT Pub. No. WO89/10655 PCT Pub. Date Nov. 2, 1989.A current control apparatus is provided for PWM-control of motor current using a microprocessor. Since motor current enters a control processor as a discrete value, a delay in control always arises. In prior art, it is not possible to accurately predict the actual current value needed for PWM control; as a result, the gain of the current control loop cannot be made large enough. Accordingly, a change pattern of A/D-converted motor current is utilized to estimate what the motor current will be at the present point in time, and current control is carried out based on this motor current. As a result, the delay is made equivalently small and the gain of the current control loop can be freely set, thus improving the response of the current control loop.</p> |
