A Resonant Converter Current Detection and Control Method

A resonant converter and current detection technology, applied in the direction of converting DC power input to DC power output, control/regulation systems, instruments, etc., can solve the problem that the current waveform of the resonant converter is not regular, the current control effect is poor, and the resonance cannot be obtained Converter average current etc.
CN110112926BActive Publication Date: 2021-04-09NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2021-04-09

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Abstract

The invention discloses a current detection and control method of a resonant converter. The current of the controlled branch is converted into a positive polarity induction signal through a current sampling circuit, and the induction signal is integrated through a resettable integration circuit and then output to a digital controller. The ADC module performs sampling, and the current operation unit calculates the average current information of the controlled branch in the integration time period according to the sampling value. After the operation of the current regulator, the PWM module and the drive amplifier unit output the drive signal, and the converter switch bridge arm Take control and reset the resettable integrating circuit. The invention can rapidly detect and control the current of the resonant converter, and improves the dynamic performance of the converter.
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Description

technical field

[0001] The invention discloses a current detection and control method for a resonant converter, which belongs to the technical field of power electronic converters. Background technique

[0002] The resonant converter refers to the use of the characteristics of the current and voltage periodic zero-crossing of the resonant elements such as inductors and capacitors in the circuit when resonance occurs, so that the switching device can realize zero-voltage (ZVS) or zero-current (ZCS) switching, that is, soft switching. The switching power supply tends to be high frequency and miniaturized, so it has been widely used in high frequency switching power supply occasions. The working principle of the commonly used DC-DC resonant converter is that the DC input voltage generates a square wave voltage after passing through the switching bridge arm, which is applied to both ends of the resonant cavity to resonate the resonant circuit, and the resonant voltage or resonan...

Claims

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