CPC H02M 1/0003 (2021.05) [H02M 1/0025 (2021.05); H02M 3/01 (2021.05); H02M 3/33573 (2021.05)] | 20 Claims |
1. A method for controlling a converter, wherein the converter comprises a switch tube, and the method comprises:
obtaining a real-time input voltage and a real-time output voltage of the converter;
determining a corresponding real-time closed-loop control output value of the converter based on the real-time input voltage and the real-time output voltage by using a closed-loop control algorithm;
determining a real-time control strategy of the switch tube from a plurality of control strategies based on the real-time closed-loop control output value; and
controlling the switch tube based on the determined real-time control strategy;
wherein when the converter is an isolated resonant direct current converter, determining the real-time control strategy of the switch tube from the plurality of control strategies based on the real-time closed-loop control output value comprises:
when the real-time closed-loop control output value is greater than or equal to a first preset value, determining the real-time control strategy as a pulse frequency modulation control strategy;
when the real-time closed-loop control output value is less than the first preset value and greater than a second preset value, determining the real-time control strategy as a pulse width modulation control strategy, wherein the first preset value is greater than the second preset value; and
when the real-time closed-loop control output value is less than or equal to the second preset value, determining the real-time control strategy as a pulse density modulation control strategy.
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