Converter control method, converter control apparatus, and readable storage medium

An apparatus for controlling a converter, wherein the converter comprises a switch tube, and the apparatus comprises:

• a voltage censoring circuit, configured to obtain a real-time input voltage and a real-time output voltage of the converter;
• and
• a control unit comprising a processor and a memory storing a program for execution by the processor, configured to:
• determine 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;
• determine 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
• control the switch tube based on the determined real-time control strategy;
• wherein when the converter is an isolated resonant direct current converter, in 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, the control unit is configured to:
• when the real-time closed-loop control output value is greater than or equal to a first preset value, determine 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, determine 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, determine the real-time control strategy as a pulse density modulation control strategy.

A non-transitory computer readable storage medium configured to store a computer program, wherein when the computer program is executed by a processor of a controlling apparatus, the apparatus performs a process for controlling a converter that 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 a switch tube of the converter 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.