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DIRECT CONTROL OF INDUCTION MOTORS. A TIME DISCRETE STRATEGY RESPECTS TIME CONTINUOUS TRAJECTORIES
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| Author(s) |
H. Segerer |
| Abstract |
The paper presents a new method to control high dynamic drives with induction motor fed by low switching voltage source lnverter. In opposition to the usually applied methods, the characteristics of the proposed one are advantageous in steady state as well as during transient operation throughout the whole operating range starting from zero frequency up into the field weakening range. The control is done by steps of milliseconds with a fast signal processor system. Therefore a complex strategy can be applied to generate directly the switching instructions for the bridge legs of the inverter. For this an extended time discrete controller and a strongly coupled voltage modulator are both influenced by the characteristics of the desired steady state voltage patterns and the corresponding flux trajectories. The generated switching sequence allows high dynamic response of electrical torque and corresponds in the special case of steady state operation to the desired synchronous (off-line optimized) or asynchronous voltage patterns. |
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| Filename: | Unnamed file |
| Filesize: | 3.772 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-07-31 by System |
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