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This paper presented a high performance DC power supply system with high input power factor. The presented DC power supply system provides the input current with low current distortion on the ac input side and the stable output dc voltage with low ripple voltage on the dc output side. The presented DC power supply system only uses four active switches to correct power factor in input side and regulate...
A ZCS-PWM interleaved boost rectifier with high power factor is proposed in this paper. The pulse-width-modulation technique and soft commutation technique are used in the proposed rectifier to promote the circuit performance. The proposed circuit includes two boost converter which are operated at interleaved mode to increase the output power and reduce the input ripple current. A ZCS-PWM auxiliary...
This paper analyses and designs a ZCS-PWM single-phase high power factor interleaved boost rectifier. The proposed rectifier combines the conventional pulse-width-modulation technique and soft commutation technique to promote the circuit performance. The proposed rectifier uses two boost rectifiers with interleaved operation to increase the output power and reduce the output ripple current and input...
A novel four main switches and four auxiliary switches power converter configuration of the three-phase voltage-doubler soft-switching rectifier is proposed in this paper. The reduction in the number of main switches can also increase the reliability because the control circuits and the auxiliary circuits are thereby reduced to two sets. All main switches in the proposed rectifier operate at zero-voltage-switching...
This paper analyses and designs a zero-current-switching single-phase high power factor transformer-isolated voltage-double boost rectifier. The proposed rectifier combines the conventional pulse-width-modulation technique, soft commutation technique and instantaneous average line current control to promote the circuit performance. Comparison with conventional transformer-isolated boost rectifier,...
This paper presents a battery charger for LiFePO4 battery pack based on a series-resonant topology. The synchronous rectification technique is incorporated into the proposed system to improve the charging performance. Moreover, the frequency domain analysis and the equivalent circuit of each operation mode are descried and conducted. The frequency characteristics of the proposed system are also detailed...
This paper analyses and designs a new soft-switching single-phase high power factor voltage-doubler rectifier. The proposed rectifier combines the conventional pulse-width-modulation technique, soft commutation technique and instantaneous average line current control to promote the circuit performance. Comparison with conventional boost rectifier, the proposed rectifier own double voltage function...
A novel single-phase full-bridge soft switching rectifier (FBSSR) using a new resonance unit is proposed in this paper. All main switches in the proposed soft switching rectifier operate at zero-voltage-switching (ZVS) turn-on and turn-off. Moreover, the auxiliary switches operate at zero-current-switching (ZCS) turn-on and turn-off. Major benefits of this novel rectifier are found in efficiency improvement,...
This paper analyses and designs a zero-current-switching single-phase high power factor voltage-doubler rectifier. The proposed rectifier combines the conventional pulse-width-modulation technique, soft commutation technique and instantaneous average line current control to promote the circuit performance. Comparison with conventional boost rectifier, the proposed rectifier own double voltage function...
This paper proposes a dc power supply system to give high power factor and low current distortion on the rectifier side and provide stable dc voltage on the isolated dc/dc converter side. The proposed dc power supply system uses a new ZVS strategy to get ZVS function. Besides operating at constant frequency, all semiconductor devices operate at soft-switching without additional voltage stress. A significant...
This paper proposes a new single-phase high power factor rectifier, which features regulation by conventional PWM, soft commutation and instantaneous average line current control. A zero-voltage-switching pulse-width modulation (ZVS-PWM) auxiliary circuit is configured in the presented ZVS-PWM rectifier to perform ZVS in the main switches and the passive switches. Furthermore, soft commutation of...
This paper proposes a novel high performance single-stage voltage regulator to give high input power factor and low current distortion on the rectifier side and provide clean and stable ac voltage on the inverter side. The proposed voltage regulator only employs four switches to perform the power factor correction in input side and provide regulation of the output ac voltage magnitude. Thus, its cost...
This paper proposes novel high input power factor single-stage single-phase AC/AC converter to give high input power factor and low current distortion on the rectifier side and provide clean and stable AC voltage on the inverter side. The proposed AC/AC converter can not only provide regulation of the output AC voltage magnitude but provide variable output AC voltage frequency. A significant reduction...
This paper proposes novel common-neutral single-stage single-phase AC/DC/AC converter to give high input power factor and low current distortion on the rectifier side and provide clean and stable AC voltage on the inverter side. The proposed AC/DC/AC converter has a common arm between the rectifier and inverter, and adopts an appropriate switching strategy. The proposed AC/DC/AC converter can not...
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