Full-voltage high-frequency direct conversion isolation type safety power supply

Abstract

The invention relates to a full-voltage high-frequency direct conversion isolation type safe power supply, which comprises a high-frequency voltage transformation conversion device, a driving device and a synchronous signal generation device, and is characterized in that the high-frequency voltage transformation conversion device comprises a front-stage IGBT switch group, a high-frequency transformer and a rear-stage IGBT switch group which are connected in sequence, the input end of the front-stage IGBT switch group inputs a direct current or alternating current power supply, the rear-stage IGBT switch group outputs a direct current or alternating current power supply converted by the high-frequency transformer, the driving device comprises a signal driving module and a driving control circuit, the driving control end of the signal driving module is electrically connected with the front-stage IGBT switch group, the high-frequency transformer and the rear-stage IGBT switch group, the signal driving module is electrically connected with the driving control circuit, and the synchronous signal generation device comprises a synchronous fundamental wave circuit, a synchronous carrier wave circuit and a synchronous reduction circuit. The full-voltage high-frequency direct conversion isolation type safe power supply is used for solving the technical problems that an existing industrial frequency transformer is large in size, high in cost, low in conversion efficiency, large in loss and large in heat productivity.

Description

technical field [0001] The invention relates to the field of safety power supply, in particular to a full-voltage high-frequency direct conversion isolation type safety power supply. Background technique [0002] For the safety of electricity users, the input power is generally isolated from the mains with a 1:1 power frequency transformer. In this way, no matter which line the electricity users touch, there will be no danger of electric shock, because The isolated power supply is not connected to the ground. [0003] As we all know, if you want to make 220V AC power safe, you need an isolation transformer. The larger the capacity, the larger the volume capacity of the isolation transformer. If you want to isolate the DC power supply voltage 1:1, you need to make a DC-DC If the transformer is isolated, then the triangular wave voltage and the square wave voltage with different amplitudes cannot be converted by the transformer. Even if it can be converted, distortion will st...

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Problems solved by technology

[0005] This application provides a full-voltage high-frequency direct conversion isolation safety power supply, which is used to solve the technical problems of the existing industrial frequency transformers such as large volume, high cost, low conversion efficiency, large loss, and large heat generation

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