Method and unit for modulating number of drive pulses of LLC resonant converter
A resonant converter and driving pulse technology, which is applied in the direction of DC power input conversion to DC power output, instruments, electrical components, etc., can solve the problem of large no-load start-up impulse voltage, etc., to reduce voltage overshoot and voltage ripple waves, to achieve the effect of wide voltage range output
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[0030] Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the protection scope of the present invention.
[0031] The present invention performs calculation and controls the PWM module in the MCU microcontroller.
[0032] A method for modulating the number of driving pulses of an LLC resonant converter proposed by the present invention, the voltage loop controller of the LLC adopts a frequency modulation control method, that is, the adjustment of the output voltage is realized by adjusting the frequency of the driving pulse; when the output value of the voltage loop controller When the converted drive pulse frequency is higher than the preset frequency, a modulation method of the number of drive pulses is adopted, that is, the output voltage is adj...
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