Control of Motor Drives Fed by PFC Circuits without DC-Link Electrolytic Capacitors

Kwang-Man Kim; Eung-Ho Kim; Jong-Woo Choi

Control of Motor Drives Fed by PFC Circuits without DC-Link Electrolytic Capacitors

Kwang-Man Kim

Eung-Ho Kim

Jong-Woo Choi

Vol. 18, No. 4, pp. 1067-1074, Jul. 2018

10.6113/JPE.2018.18.4.1067

Capacitor-less

Inverter drive

PFC

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Abstract

This paper presents a control method for variable-speed motor drives that do not use a DC-link electrolytic capacitor. The proposed circuit consists of a power factor correction converter for boosting the DC-link voltage, an inverter for driving the motor, and a small DC-link film capacitor. By employing a small DC-link capacitor, the proposed circuit that is small, and a low cost and weight are achieved. However, because the DC-link voltage varies periodically, the control of the circuit is more difficult than that of the conventional method. Using the proposed control method, an inverter can be controlled reliably even when the capacitance of the DC-link capacitor is very small. Experiments are performed using a 1.5-kW inverter with a 20-μF DC-link capacitor, and the experimental results are analyzed thoroughly.

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Cite this article

[IEEE Style]

K. Kim, E. Kim, J. Choi, "Control of Motor Drives Fed by PFC Circuits without DC-Link Electrolytic Capacitors," Journal of Power Electronics, vol. 18, no. 4, pp. 1067-1074, 2018. DOI: 10.6113/JPE.2018.18.4.1067.

[ACM Style]

Kwang-Man Kim, Eung-Ho Kim, and Jong-Woo Choi. 2018. Control of Motor Drives Fed by PFC Circuits without DC-Link Electrolytic Capacitors. Journal of Power Electronics, 18, 4, (2018), 1067-1074. DOI: 10.6113/JPE.2018.18.4.1067.