Abstract
The paper reveals issues with operation of practical current source fed phase shift controlled semi active rectifier (PS-ZVS SAR), often utilized as the output stage of resonant converters functioning in load independent output current mode. Active rectifier adoption allows attaining load matching or DC output regulation capabilities. In this work, operation of a practical PS-ZVS SAR is revisited taking into account output capacitances of switching devices in order to derive lower and upper bounds of attainable output DC current and phase shift angle. Furthermore, measurement and computational delay imposed by digital implementation is also considered for accurate prediction of practical system behavior. According to the findings, voltage transients caused by parasitic capacitances of semi-conductor devices and digital delays narrow the feasible phase shift angle region. In order to validate the presented material, series-series compensated wireless power transfer system employing PS-ZVS SAR as receiving-side rectifier is studied as an example. Analytical framework is shown to be accurately supported by both simulations and experiments.
Original language | American English |
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Journal | IEEE Journal of Emerging and Selected Topics in Power Electronics |
DOIs | |
State | Accepted/In press - 1 Jan 2024 |
Keywords
- Digital control
- phase shift control
- rectifier topology
- resonant converters
- semi active rectifier (SAR)
- wireless power transfer (WPT)
All Science Journal Classification (ASJC) codes
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering