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In this paper, a novel active boost converter for the SR drive is proposed. An active capacitor circuit is added in the front-end. Based on this active capacitor network, when the boost switch turns off, this network seems as a passive capacitor network. And the voltage of boost capacitor can keep balance with the DC-link voltage automatically. In the capacitor network, the discharging voltage is...
The asymmetrical half bridge flyback converter is gaining popularity because it can achieve ZVS operation. However, the relationship between voltage transfer ratio and duty cycle is nonlinear in the condition of high switching frequency and small blocking capacitor. It is improper to use the linear model to guide the design of asymmetrical half bridge flyback converter. This paper deduces a steady-state...
The novel application of CCC technology in the slip energy recovery drive system (SERDS) is proposed for an improvement of the susceptibility of the inverter to commutation failure, reducing the reactive power consumption and a good power factor. In this paper, the reason of commutation failure is analyzed, simulation model with proposed commutated capacitors between the inverter bridge and the inverter...
A novel bi-directional buck-boost converter used for battery charging and discharging cooperated with a three-level half bridge inverter in a UPS is proposed. The operation of charging and discharging can be controlled respectively, and the capacitor voltage balance can be achieved based on the peak current control. The operating principle and parameter design of the converter are analyzed in detail...
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