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A MICROPROCESSOR-BASED CURRENT CONTROLLER WITH AN INTERNAL CURRENT RATE LOOP FOR MOTOR DRIVES
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| Author(s) |
T. Ohmae; T. Matsuda; R. Masaki; K. Saito |
| Abstract |
A new current control method is described which is suitable for a microprocessor-based speed regulator of motor drives. The method achieves fast response and high accuracy performance by using a major current loop and an internal current rate loop. The former is used to control precisely the mean value of the motor current by employing a current feedback signal obtained from a smoothing filter of the rippled current. The latter loop is used to stabilize the major loop with a high gain and to limit the variation rate of the motor current by employing the current feedback signal obtained from the instantaneous current without time delay. A current controller using a microprocessor was trial manufactured and tested with a thyristor converter driven dc motor. It was found that, fast controlled current response can be obtained even with a relatively long sampling period. |
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| Filename: | Unnamed file |
| Filesize: | 3.397 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-03-11 by System |
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