LCC resonant converter PWM phase shift mixed control and efficiency optimization method
A resonant converter, efficiency optimization technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., can solve problems such as reducing the efficiency of resonant converters, reducing converter efficiency, and large device stress. To achieve the effect of enhanced degree of control freedom, improved degree of freedom, and small resonant current
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[0052] The present invention will be further described below in conjunction with the accompanying drawings.
[0053] The present invention proposes a PWM phase-shifting hybrid control and efficiency optimization method for LCC resonant converter, the block diagram of the control system is as follows image 3 shown. The main steps include:
[0054] (1) Sample the output voltage of the LCC resonant converter, make a difference with the reference value and use it as the input of the voltage regulator to obtain the output c;
[0055] (2) Sampling the resonant current of the LCC resonant converter, and obtaining two correction coefficients k through the optimization algorithm 1 、k 2 ;
[0056] (3) use k 1 、k 2 Calculate and correct the output command value c of the voltage regulator to obtain two command values of the PWM phase shift hybrid control method: phase shift angle θ and duty cycle d;
[0057] (4) Input the command value of the phase shift angle θ and the duty cyc...
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