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Abstract-Due to nonlinear electromagnetic characteristics of Switched Reluctance Motor (SRM), as well as complexity of voltage and current waveforms, it is of great difficulty to control SRM optimally and compute power losses. A novel optimal control strategy of Non-Energy Returnable Current Chop (NERCC) was proposed, which is suitable for high power SRM drive. This method can obtain current waveform...
The LC resonance in the traditional passive quasi resonant soft switched Zero Voltage Switching (ZVS)-SEPIC converter, together with the adoption of pulse frequency modulation leads to the complex control and high electrical stress of its electronic components. In order to resolve this issue, the use of an active clamped topology for the ZVS-SEPIC is proposed. With this technique, the resonant effect...
This paper deals with the implementation of FM-ZCS-QRC fed Dc servo drive using micro controller. The salient feature of QRC is that the switching devices can be either switched on at zero voltage or switched off at zero current, so that switching losses are zero ideally. Switching stresses are low, volumes are low and power density is high. This property imparts high efficiency and high power density...
This paper presents a high-efficiency-high power density one stage ZVS-PWM single-ended push-pull (SEPP) high frequency inverter with new PFC functional scheme. This high-frequency resonant series load resonant inverter with lossless snubbing capacitors is composed of a passive PFC converter operating at one diode conducting bridge circuit and asymmetrical ZVS-PWM high frequency resonant direct inverter...
This paper introduces a new soft switching current-fed DC-DC power converter. A clamp circuit in this converter provides soft switching condition for all switches and absorbs the voltage spikes of main switches at turn off instance. This converter contains four switches, two main switches and two auxiliary switches. Since all switches operate under soft switching condition, this converter can operate...
A three-phase single-stage full-bridge power factor correction converter is presented in this paper. The converter could achieve power factor correction and AC/DC power conversion in one stage circuit. It could achieve electrical isolation between input and output sides. The voltage stress of each switch is reduced due to the adopting of the active clamp circuit. By using soft-switching techniques,...
This paper presents a new soft switching bidirectional buck or boost DC-DC converter. Compared to the traditional bidirectional DC-DC converter, the new topology can be used as a buck converter or a boost converter in bidirectional cases for Hybrid Electric Vehicles (HEV) and Electrosorb Technology (EST) etc. This new converter has the advantages of simple circuit and control strategy, soft-switching...
According to the basic characteristics of air plasma cutting inverter, the cutting inverter with sliding mode control (SMC) is researched and designed. Unlike the traditional PI control with the contradictory between the small voltage overshoot and the fast response time, SMC has not only effectively solved the voltage overshoot during the cutting process, but also realized a faster voltage response...
Through analyzing the shortcomings of the control system on the traditional cutting inverter, this paper presents the double close loop control system based on pole assignment for cutting inverter, which based on phase shift full bridge zero voltage switched (PS-FB-ZVS). This paper builds the small signal mode of PS-FB-ZVS PWM converter, and assigns the double close loop PI parameters by pole assignment...
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