Resonant converter device and use method therefor

Abstract

The invention discloses a resonant converter device and a use method thereof. The resonant converter device comprises a plurality of resonant converters and a control module, wherein the plurality of resonant converters are connected in parallel; the control module outputs a pulse-width modulation control signal and comprises a voltage control loop and a current control loop; the voltage control loop compares sensed output voltage with a preset reference voltage, and outputs the pulse-width modulation control signal to one of the plurality of converters so as to enable the output voltage of the converter to be equal to the preset reference voltage; and the current control loop takes the sensed output current of the converter as a reference current, compares the reference current with sensed output currents of other converters in the plurality of converters except one converter, generates frequency adjusting variable and calculates respective pulse-width modulation control signals for each of the other converters so as to enable the output currents of all the converters to be equal. Therefore, the invention provides a current balance mechanism for the converter device.

Description

technical field [0001] The present invention relates to a resonant converter device and a method therefor, and more particularly, to a converter device comprising two or more resonant converters connected in parallel and a method therefor. Background technique [0002] At present, high-power converter devices can use two or more resonant converters connected in parallel to provide high output current, which is beneficial to the maintenance of the device, and can improve the reliability of the device through redundant parallel connection. However, although multiple resonant converters connected in parallel can obtain the same current output by using a symmetrical circuit layout, it is difficult to obtain a completely symmetrical layout in practice due to the inherent differences between circuit characteristics, so these converters There is usually a current difference between them. This reduces the efficiency of the converter assembly and creates heat loss problems, which ca...

AI Technical Summary

Problems solved by technology

However, although multiple resonant converters connected in parallel can obtain the same current output by using a symmetrical circuit layout, it is difficult to obtain a completely symmetrical layout in practice due to the inherent differences between circuit characteristics, so these converters There is usually a current difference between

This will reduce the efficiency of the converter unit and create heat loss problems, which can be significant for converters with high output currents

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