Shin-Won Kang, Sang-Il Kim, Rae-Young Kim, D. Hyun
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A Novel Power Factor Control for Synchronous Motor Drive System with Small DC-Link Capacitor
This paper proposes a control strategy for high power factor without electrolytic capacitor in home appliance. The proposed system consists of single-phase diode rectifier, small film capacitor (14uF), three-phase voltage inverter and AC motor. In order to obtain a high power factor, this paper proposes a new control method that delays q-axis current compared with phase of grid voltage. The method is based on the field-oriented control and uses the space vector pulse width modulation (SVPWM). The simulation results illustrate the validity of the analytical approach and the efficiency of the proposed method.
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