Parallel Connected Multiple Motor Drive System Using Small Auxiliary Inverter for Permanent Magnet Synchronous Motors
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- Nagano Tsuyoshi
- Nagaoka University of Technology
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- Chiang Goh Teck
- Nagaoka University of Technology
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- Itoh Jun-ichi
- Nagaoka University of Technology
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抄録
This paper proposes a parallel operation system of permanent magnet synchronous motors (PMSMs) and verifies the suppression effect of the proposed damping control for the torque vibration caused by resonance between synchronous reactance and inertia moment. The proposed system is composed by two types of power converters, a main inverter with a V/f control and an auxiliary inverter with the field-oriented control and the damping control. In general, PMSM cannot be driven by the V/f control such as an induction motor because the speed vibration is caused by the resonance between the synchronous reactance and the inertia moment. In the proposed system, the multiple PMSMs are driven in parallel by the main inverter with the V/f control. When the motor speed vibration occurs, the damping control for the auxiliary inverter suppresses this vibration in PMSM. From the frequency characteristics, it is clear that the power capacity of the auxiliary inverter is 10% lower than that of the main inverter when the frequency components included in the speed command are lower than 12rad/s. As a result, the experimental results demonstrated that the proposed system can reduce the speed vibration from 400r/min to nearly 0r/min with the damping control in our prototype of 1500-W PMSM drive system. The experimental results well agree with the theoretical analysis results.
収録刊行物
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- IEEJ Journal of Industry Applications
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IEEJ Journal of Industry Applications 4 (1), 40-48, 2015
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