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Design and implementation of a PGA-based controller is presented in this paper. First general control scheme for resonant inverter is introduced and the PGA-based controller construction is given. Then the small signal model of the close loop system for a resonant inverter is analyzed. Thus compensator can be designed. Moreover, the key functional blocks within FPGA including variable frequency pulse...
This paper proposes a general modelling analysis method for a complete closed-loop control system for resonant inverters, such as LC series resonant inverter, LLC and LCC series-parallel resonant inverters, which use variable frequency variable duty cycle scheme. A half-bridge series resonant induction cooker with the variable frequency asymmetrical pulse width modulation (VFAPWM) control is used...
Asymmetrical pulse width modulation (APWM) with frequency tracking control strategy is proposed for half bridge series resonant inverter for induction cookers, by which inverter is operated at zero-voltage-switching (ZVS) over wide load range. The FPGA-based full digital control system construction and operation are described. Steady state characteristics, such as normalized output power, turn-off...
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