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Suppression of DC-Link Voltage Fluctuation in the Motor Drive System with Reduced Capacitance

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Abstract

For general household appliances with large inertia, such as air conditioning compressor, the control system does not require high speed accuracy of motor control. In order to reduce the cost and volume of the controller, reducing the DC-link capacitance within a reasonable range has been paid more and more attention. In this paper, the permanent magnet synchronous motor (PMSM) drive system with reduced capacitance is studied. Aiming at the DC-link voltage fluctuation caused by reducing the capacitance, a voltage fluctuation suppression strategy is proposed, which transfers the DC side oscillation energy to the motor side. The proposed method adopts the sampled DC-link voltage to control the motor to suppress the power fluctuation on DC-link. At the same time, to ensure the suppression effect, a preprocessing of over-modulation strategy without changing the output power is proposed also. The experimental results of 220 μF and 110 μF as DC-link capacitance verify the effectiveness of the proposed control method.

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  1. School of Mechatronic Engineering and Automation, Shanghai University, Shanghai, China

    Hongmin Lin & Wenxiang Song

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  1. Hongmin Lin
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  2. Wenxiang Song
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Correspondence to Hongmin Lin.

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Lin, H., Song, W. Suppression of DC-Link Voltage Fluctuation in the Motor Drive System with Reduced Capacitance. J. Electr. Eng. Technol. 16, 2611–2620 (2021). https://doi.org/10.1007/s42835-021-00786-6

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  • DOI: https://doi.org/10.1007/s42835-021-00786-6

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