| Summary: | 碩士 === 逢甲大學 === 電機工程學系 === 107 === Recently, the process technology of semiconductor components has been continuously improved, and the switching frequency of power switching components has also been greatly improved (the frequency can reach several MHz). Generally, the traditional full bridge adopts the so-called Hard Switching. When the switching frequency is increased, the power switch is turned on and Cut-off cuts cause unnecessary losses and reduce conversion efficiency. Therefore, Soft Switching is used to achieve Zero Voltage Switching (ZVS), which reduces the losses caused by switching.
This thesis mainly discusses the circuit architecture of a zero-voltage switching high-frequency phase-shifted full-bridge converter. The MOSFET (Metal Oxide Semiconductor Field Effect Transistor) made of Silicon Carbine (SiC) is used as a switching element to increase the switching speed and improve the MOSFET. The switching frequency reduces the size of the filter components and increases the power density of the converter. Resonant inductors are used in the circuit to achieve so-called zero voltage switching. The paper uses the TMS320F28335 digital signal processor of Texas Instruments' DSP C2000 series. This DSP has higher performance and operation count, and realizes high-frequency phase-shift full-bridge zero-voltage switching control.
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