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STABILIZING METHODS AT HIGH FREQUENCIES FOR AN INDUCTION MOTOR DRIVEN BY A PWM INVERTER
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| Author(s) |
N. Mutoh; K. Sakai; A. Ueda |
| Abstract |
New control methods are described which can suppress instability generated at high frequencies when an induction motor is driven by a PWM inverter. The methods are discussed according to two categories of motor driving systems: using closed loop control with current regulators, and using open-loop control with ony PWM controllers. In the former, the method prevents instability of the primary currents from occurring at high frequencies by compensating for gain reduction and phase-lag of current regulators while controlling amplitude and frequency of the carrier wave. In the latter, the method prevents oscillations of primary currents from occurring at high frequencies by generating PWM signals while controlling the sampling time of the PWM control so that the sampling phase can be synchronized with the instantaneous phase of the primary magnetic flux reference. Experiments confirm that both methods enable induction motors to be stably driven up to high frequencies such as 500Hz. |
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| Filename: | Unnamed file |
| Filesize: | 3.325 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-08-15 by System |
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