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Carrier signal based sensorless control of electrically excited synchronous machines at standstill and low speed using the rotor winding as a receiver
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| Author(s) |
Alexander RAMBETIUS, Bernhard PIEPENBREIER, Markus SEILMEIER, Sebastian EBERSBERGER |
| Abstract |
This paper presents a new carrier signal based approach for motion sensorless control of electricallyexcited synchronous machines. In the case of permanent magnet synchronous machines sensorlesscontrol at standstill and low speed is mostly done by injecting a high-frequency voltage and evaluatingthe resulting current response. Hence, the stator is used as the transmitter and as the receiver of thecarrier signal. The major drawback is that a magnetic saliency is mandatory. In the case of electricallyexcited synchronous machines the rotor voltage serves as an additional input to the system and theresulting field current as an additional, easy to measure, state variable. The presented approach makesuse of this fact and uses the field winding as the receiver of a carrier signal, which is injected into thestator winding. Like this no magnetic saliency is mandatory in order to track the position. The newapproach is compared to a well-known carrier signal based method, in which the stator works as thetransmitter and as the receiver of the carrier signal. In this case a magnetic saliency is mandatorywhich differs from the saliency necessary for permanent magnet synchronous machines. Theapplicability of both approaches is proven in experiments. |
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| Filename: | 0035-epe2013-full-17045990.pdf |
| Filesize: | 446.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2014-02-09 by System |
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