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As time progresses and technology develops in recent years, the demand for networking communication products is on the increase. Almost all nations throughout the world adopt AC power transmission system. To avoid current phase shift or distortion that would indirectly influence energy conversion performance and power quality in the AC-DC conversion process, it's important to insert PFC into power...
This paper designs and implements a charger with high output current for EV batteries, the structure of the charger is formed of a four-phase interleaved buck converter with synchronous rectification and associated with the digital controller, in which the current sharing control is realized. The interleaved control scheme can reduce the output ripple and decrease the power component stress in battery...
This paper provides the compensation strategies of the output voltage imbalance on the four-switch half-bridge (HB) power factor corrector (PFC). Conventionally, the imbalance compensation is achieved by PWM switching control in four-switch HB PFC. But, the output voltage imbalance compensation will be failure while the imbalance phenomenon excesses a threshold to limit the load range in the four-switch...
A novel single-stage switching power supply with half-bridge topology is presented in this paper. The proposed novel single-stage switching power supply is formed from integration of one half-bridge ac/dc power factor corrector (PFC) and one half-bridge dc/dc postregulator. The proposed switching power supply operations are verified and discussed, from which the inductor design criteria are resulted...
A prototype single-stage half-bridge power converter is presented in this paper. This novel single-stage half-bridge power converter is formed from the integration of one half-bridge ac/dc power factor corrector (PFC) and one half-bridge dc/dc post-regulator by the component placement technique. The operations in the proposed power converter are discussed thereby verifying the feasibility and functionality...
A novel modulation control scheme of switching frequency for multiphase synchronous rectified voltage regulator module (VRM) used in such as motherboards is proposed in this paper. The switching frequency is modulated higher as VRM loads more lightly and vice versa, so that the proposed scheme is also called variable-frequency control method. Zero voltage switching (ZVS) can be achieved to boost VRM...
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