Hybrid one‐cycle control technique for three‐phase power factor control

Abstract

One-cycle control technique has been a prominent and suitable solution for improving power quality with the help of three-phase rectifiers. This study proposes a generalised control strategy for the three-phase power factor rectifier based on both the one-cycle control technique and the hybrid pulse-width modulation (PWM) strategy. Improvement of the performance while providing very low-current total harmonic distortion (THD) is achieved with the proposed scheme. Discontinuous and/or continuous PWM operation is possible with advantages of simplicity, robustness, and low cost. Simulation and experimental results confirm the feasibility of the proposed controller.

One Cycle Control of A PWM Rectifier a New Approach

“…The equation (35) denotes modulation index m a , as I g is modulating and V m is carrier amplitude [21]. Applying final value theorem to (35), for a unit step response ( 1 s ) when t → +∞,…”

“…This version enhances OCC with DSP calculation capability and uses closed-loop resistance emulation. Then, the software offers more possibilities to apply OCC to the most complex control issues than those of hardware [33], [34], [35]. Besides, unlike enhanced-loops methods mentioned above [11], [12], [14], [13], [15], [16], [17], [18], software-OCC does not need PLL, nor Park/Clarke transformations, nor online parameter calculations, achieving some control simplicity.…”

Power factor improvement of permanent‐magnet linear vernier motor by using dual‐inverter with hybrid discontinuous PWM

“…The CPWMs have higher switching loss than the DPWMs at the same switching frequency. Moreover, for each DPWM, its switching loss is closely related to the load power factor [23,24]. According to (18) and (20), the modulation signals and corresponding zero-sequence signals of the SVPWM, 30° DPWM, 60° DPWM, and 120° DPWM are plotted in Fig.…”

One Cycle Control of a PWM Rectifier a New Approach

“…This version enhances OCC with DSP calculation capability and uses closed-loop resistance emulation. Then, the software offers more possibilities to apply the OCC to the most complex control issues than those of hardware [31][32][33]. Besides, unlike enhanced-loops methods mentioned above [11][12][13][14][15][16][17][18] The software-OCC does not use PLL, Park/Clarke transformations or online parameter calculations, therefore, it achieves some control simplicity.…”