Power module circuit for electric vehicle charger controller

Abstract

The invention discloses a power module circuit for an electric vehicle charger controller. A diode bridge rectifier circuit is used for receiving an input alternating current, converting the alternating current into a direct current and outputting the direct current; a transformer T2 is used for receiving the direct current output by the diode bridge rectifier circuit and transforming a direct-current voltage; a photoelectric coupler TLP281 is connected with the primary and secondary sides of the transformer T2 and used for feeding a voltage output by the secondary side of the transformer T2; and a core control circuit is connected with the diode bridge rectifier circuit, the transformer T2 and the photoelectric coupler TLP281 and used for controlling the transformer T2 to work at a frequency of 66 kHz and adjusting the duty ratio of a switch frequency according to the feedback of the photoelectric coupler TLP281 to guarantee that the fixed voltage is output from the secondary side of the transformer T2. The power module circuit is higher in working stability and reliability, effectively prolongs the service life of a power module of the electric vehicle charger controller, and is simple in structure, strong in practicality, higher in promotion and application values, small in occupied space and high in drive power.

Description

technical field [0001] The invention belongs to the technical field of electric vehicle chargers, and in particular relates to a power supply module circuit used for an electric vehicle charger controller. Background technique [0002] The stability and reliability of the power module circuit of the controller of the electric vehicle charger directly affects the basic functions of the charger. Due to the small power requirements of the power module of the controller of the charger on the market, many of them use power frequency transformers, which are large in size and low in efficiency. The output voltage will change with the change of the output AC voltage. for controller use. With the development of electric vehicles in our country, the demand for chargers with small space and high output power is proposed, and the internal parts of the charger are developing in the direction of small space and high reliability. Contents of the invention [0003] The purpose of the pr...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a power module circuit for the electric vehicle charger controller, aiming to solve the problem that the power module circuit of the electric vehicle charger provided by the prior art takes up a large space, the output voltage is unstable, and the failure rate is high , work stability and poor reliability

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