A Zero Voltage Switching SVM (ZVS–SVM) Controlled Three-Phase Boost Rectifier

Abstract

A zero voltage switching space vector modulation (ZVS-SVM) controlled three-phase boost rectifier is proposed. A branch composed of one active switch, one resonant inductor and one clamping capacitor is added to the six-switch boost rectifier. In addition, a ZVS-SVM for the rectifier is proposed. It can effectively suppress the reverse recovery process of the bridge switch anti-parallel diodes. All the switches are turned on under zero voltage condition, thus the switching loss is reduced, and electromagnetic interence can be lowered. The switching frequency of the rectifier is fixed. The auxiliary switch works at the same frequency with other switch. All the switches in the rectifier have lower voltage stress. A digital signal processor controlled 4-kW prototype is built to verify the theory. Index Terms-Electromagnetic interference (EMI), power factor correction (PFC), zero voltage switching space vector modulation (ZVS-SVM).

Robust control strategies for a two‐stage soft‐switching heating power supply of silicon growth furnace

“…In addition, for the first-stage converter, the equivalent load of the second-stage converter is changed according to the working conditions and the duty cycle. When the load of the second stage converter changes from 3Ω to 4.5Ω, the output DC voltage simulation results of the first-stage converter using the traditional PI control method in [11], the feedback control method without sliding mode observer in [13] (control law Equation ( 11)) and the proposed feedback control method with FIGURE 9 The A-phase voltage and the corresponding current simulation comparison results under circuit parameters uncertainty using the traditional PI control method in [11], the traditional P-MPC method in [23] and the proposed RP-MPC method for the first-stage CACZVS three-phase PFC converter FIGURE 10 The output DC voltage simulation comparison results of the first-stage CACZVS three phase PFC converter under load variation condition using the traditional PI control method in [11], the feedback control method in [13] and the proposed control method with the sliding mode observer FIGURE 11 The output DC voltage simulation comparison results of the second-stage FB-ZVZCS converter using the traditional PI control method in [12], the general fuzzy control method in [24] and the proposed variable universe fuzzy control method FIGURE 12 The experiment results of the first-stage CACZVS three-phase PFC converter using the proposed method under nominal circuit parameters condition: (a) the A-phase voltage and the corresponding current waveforms (b) the results measured by HIOKI 3197 (c) the zero voltage soft-switching waveforms of the switch S 1 the sliding mode observer are shown in Figure 10 in the red dotted line, blue dashed line and green solid line, respectively, where the second-stage converter using the proposed variable universe fuzzy control method.…”

“…The auxiliary switch S 7 , using sector 1 for example, switches off before the voltage vector U 0 was activated and remain turn-off at a specified short interval within each switching period to create the zero voltage soft-switching conditions for the main circuit switches S 1 to S 6 , as shown in Figure 3. The more detailed working principle of the CACZVS three-phase PFC converter can be found in references [10,21].…”

“…Solving (8), we have: (9) For the outer control loop, the voltage dynamic of the firststage the CACZVS three-phase PFC converter under dq rotation coordinate frame is expressed as [10]…”

Optimization controller design of CACZVS three phase PFC converter using particle swarm optimization

“…However, switching loss and diode reverse recovery in the converter increase the power loss. Recently, the idea of compound active-clamp in single-phase PFC converter was extended into three-phase PWM converter [2], thus a compound active-clamp zero-voltage soft-switching (CAS-ZVS) three-phase power factor correction (PFC) converter was proposed in reference [3]. This converter can achieve all switches (including auxiliary switch) zero-voltage switching, and can inhibit the diode reverse recovery current to reduce the reverse recovery loss.…”

“…The off-time of S 7 is very short when diode reverse recovery happens [3]. It does not affect the main circuit in the rest time of the whole period of the cycle.…”