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Conventional CCM Boost (CB) PFC has been widely used for the PFC applications because of its high input power factor and simplicity, but it suffers from conduction loss in the input rectifier bridge and switching loss due to the high switching frequency. The efficiency decreases significantly under the low input voltage or the light load work condition. In this paper, a novel Enabling Window Control...
A low cost utility interactive inverter is valuable to the residential PV or fuel cell distributed generations. This paper presents a low cost solution to the single-phase grid-connected inverters, including the inverter topology, filter structure, and the current control methods. The reason for choosing the proposed converter topology is given. A novel current control method using the combinatorial...
The ZVS-SVM controlled three-phase boost rectifier can realize ZVS operation for all switching devices. In this paper, the operation principal and design guideline are described in detail. The soft switching restriction is analyzed in particular. The experimental results of a 40 kW hardware prototype are presented to show the superiority of the topology and the reduction on loss.
The MVAC-SVM controlled three-phase boost rectifier can realize ZVS operation for all switching devices. SVM can be realized with switch device operating at the fixed switching frequency. And the switching voltage stress of all the power switch devices is equal to the DC link voltage. In this paper, a minimum voltage active clamping zero voltage switching SVM controlled three phase boost rectifier...
The compound active clamping three-phase boost rectifier proposed by authors has a clamp branch composed of an active switch, a resonant inductor and a clamping capacitor. With a novel zero voltage switching space vector modulation (ZVS-SVM) method, the rectifier can realize ZVS operation for all switching devices and effectively suppress the reverse recovery process of the bridge leg switch anti-parallel...
Design method for an accurately regulated multiple output ZVS DC/DC converter is proposed. The converter is composed of three outputs altogether. The 1st and 3rd outputs are regulated through the duty cycle control of two asymmetrical half bridge converters, while the 2nd output is regulated through the phase shift of the two asymmetrical half bridge converters. The characteristic of the proposed...
A novel zero voltage switching SVM (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 novel space vector modulation (ZVS-SVM) for the rectifier is proposed. It can effectively suppress the reverse recovery process of the bridge switches' anti-parallel...
A ZVS three level two transistor forward DC/DC converter (input 600 V, output 48 V/50 A) is proposed. The performance of a 600 V/10 A silicon carbide (SiC) Schottky diode (Cree CDS10060) is experimentally evaluated on the prototype. Reverse recovery and overall efficiency are compared between the SiC diode and fast soft-recovery silicon power diode
In three-phase PFC converter, there exist severe switch antiparallel diode reverse recovery problems. The effective measures of compound active-clamping and minimal voltage active-clamping techniques in single phase PFC are extended to three-phase PFC. A family of active-clamping ZVS soft switching PFC converter is derived. They can effectively suppress the diode reverse recovery and realize ZVS for...
PWM is introduced to phase-shift bidirectional dc-dc converters, which can reduce current stresses, conduction loss and switching loss of semiconductors and can expand ZVS range. A technique to synthesize PWM plus phase-shift bidirectional dc-dc converter topologies is presented. Theoretical analysis, simulation and experimental results of one particular converter taken as an example, are provided...
In three-phase PFC converter, there exist severe switch antiparallel diode reverse recovery problems. The effective measures of compound active-clamping and minimal voltage active-clamping techniques in single phase PFC are extended to three-phase PFC. A family of active-clamping ZVS soft switching PFC converter is derived. They can effectively suppress the diode reverse recovery and realize ZVS for...
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