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In the high-power LED driver system, a single-stage boost-LLC type soft-switched AC-DC converter is usually employed for obtaining the high efficiency and low cost. However, the high bus voltage is its fatal disadvantage due to the PFM control strategy. Thus, this LED driver is only applied in the low ac input voltage case. In order to overcome this problem, an asymmetric PWM (APWM) feed-forward strategy...
A new type of Class E rectifier that can regulate the output voltage or power is proposed. The proposed rectifier is composed of a conventional Class E zero-voltage-switching rectifier and the controlled shunt capacitor whose capacitance is variable according to the state of the active switches. With turning the active switches ON or OFF, the shunt capacitance of the rectifier can be changed, which...
In this paper it is presented a new integrated power conditioner topology proposed for a fuel cell based on power supply system. The proposed converter combines the conventional ZVS active clamp full bridge boost converter structure with the sinusoidal pulse width modulation technique to guarantee a sinusoidal output voltage. Particularly, the proposed fuel cell power conditioner is intended for stand-alone...
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