Direct Power Control of a Three-Phase Inverter for Grid Input Current Shaping of a Single-Phase Diode Rectifier With a Small DC-Link Capacitor

Compensation of Periodic Magnetic Saturation Effects for the High-Speed Sensorless Control of PMSM Driven by Inverter Output Power Control-based PFC Strategy

“…14(b) shows that the measured harmonic current at the AC mains satisfies the regulation of IEC 61000-3-2 (class A) [2]. The performance of input current waveform shaping can be improved by utilizing the method presented in [6]. However, the effect of the performance of the input current waveform shaping on the sensorless control is insignificant if the harmonic current at the AC mains is regulated within the limit of IEC 61000-3-2 (class A).…”

“…2 illustrates the relationship among p in , p c , and p out under a unity power factor condition when the inverter output power control strategy given by (4) is employed. When the power factor is controlled this way, conventional PFC circuits are removed and large electrolytic DC-link capacitors are replaced with a small film capacitor; thus the size and cost of the inverter can be significantly reduced compared to the conventional PFC circuit-based inverter [5], [6].…”

“…Various control strategies have been introduced in [3][4][5][6]] to obtain a high power factor at the AC mains through the inverter output power control. In this study, the d-q axes current command generation method presented in [4] was utilized.…”

“…However, the d-axis current should also be appropriately controlled to obtain the aforementioned control object. The procedure for the generation of the d-axis current reference has been introduced in [4,6], and the resulting d-axis current command is given by Fig. 4.…”

“…An inverter output power control-based PFC strategy that involves removing the PFC circuits and replacing large electrolytic DC-link capacitors with a small film capacitor, as shown in Fig. 1(b), is currently gaining attention in the appliance industry because this strategy can significantly reduce the cost and size of the inverter [3]- [6]. Fig.…”