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DIGITAL SIMULATION OF DOUBLE-FED ASYNCHRONOUS MACHINE WITH CURRENT SOURCE INVERTER FOR MICROPROCESSOR CONTROL
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| Author(s) |
I. F. El-Sayed; P. K. Sattler |
| Abstract |
Improvement in microprocessor technology will make possible further reduction of the hardware required and create additional options such as self-adaptive control. From the various possibilities to realize a variable-speed drive by combining a static converter and a polyphase ac machine, the double-fed asynchronous machine together with the current-source inverter offers a new and interesting drive system. An overall digital simulation of the complete converter-fed machine including the control system and the coupled machinery is proyided. This presents a treatment of the physical phenomena within the converter and the machine-converter interactions. This paper realizes such a simulation tool which will facilitate the study of a wide variety of transient as well as steady-state closed loop systems. The present system equations are derived on the basis of space phasors. The work has concentrated mainly on the prediction of system behavior and the development of control strategies for use in controlling ac machines with microprocessor. Several computer runs are shown to illustrate the simulation of typical inverter operation with the double-fed machine. Hence a simple observer model is developed to obtain the position of the rotor current space phasor and the rotor mechanical speed only by means of the electrical quantities. The control of the electromagnetic torque and the minimization of the pulsating torque are studied. |
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| Filename: | Unnamed file |
| Filesize: | 3.503 MB |
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| Type |
Members Only |
| Date |
Last modified 2021-03-10 by System |
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