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JEET, Vol. 13, No. 5, September 2018
Design of Robust Resonance Suppression Controller in Parameter Variation for Speed Control of Parallel Connected Dual SPMSMs Fed by a Single Inverter
Woo-Hyen Kwon
Area B - Electric Machinery and Power Electronics
Abstract This paper proposes a controller design method for suppressing the resonance generated in the slave motor in the middle and low speed operation range, according to the load and parameter differences between two motors, during parallel operation using the master and slave method that controls two surface permanent magnet synchronous motors connected in parallel by a single inverter. The proposed resonance suppression controller is directly obtained by analyzing the resonance characteristics, using the lead controller method. Therefore, it is possible to fundamentally reduce trial and error to set the controller gain. In addition, because the proposed resonance suppression controller was designed as a lead controller, the stability region of the system increased owing to the added zero point, making the system robust with respect to parametric variations. Simulations and experiments confirmed the usefulness of the proposed method and the systems robustness with respect to parametric variations.
Keyword Dual SPMSMs,SIMM,Resonance characteristic analysis,Lead controller.
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