Continuous adjustable power supply with variable structure and constant power

Abstract

The invention relates to a direct current switch power supply, in particular relates to a continuous adjustable power supply with a variable structure and constant power, comprising a full-bridge direct current converter and a high-frequency transformer, wherein a primary side of the high-frequency transformer is connected on the full-bridge direct current converter, a secondary side of the high-frequency transformer comprises two groups of diode rectification bridges, two filtering inductors with equal inductance values and one output filtering capacitor, and a control switch and two bypath diodes are connected between each filtering capacitor and the filtering capacitor. According to the continuous adjustable power supply with the variable structure and the constant power, disclosed by the invention, serial-connection operation during high-voltage output is realized, parallel-connection operation during high-current output is realized, and the adjusting range of output voltage can be enlarged; and therefore, a good stable state and dynamic properties are realized, and a constant-power output function is realized; and the excellent voltage regulating rate and the excellent load regulating rate are realized, the output voltage ripple coefficient is relative small, and the relative high efficiency is realized within a full output voltage range.

Description

[0001] Technical field: [0002] The invention relates to a DC switching power supply, in particular to a continuously adjustable variable-structure constant power supply. Background technique: [0003] At present, switching power supplies have entered various electronic and electrical equipment fields one after another, and switching power supplies have been widely used in program-controlled switches, space technology, computers, communications, radar, household appliances, electronic testing equipment power supplies, and control equipment power supplies. The known switching power supply technology mainly adopts: a hybrid modulation method combining frequency modulation and width modulation, a method of changing the transformation ratio of a transformer, and a method of phase-staggered control. In the frequency modulation and width modulation control method, the frequency needs to be changed, which will bring more difficulty to the design of the transformer and filter; in ...

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Problems solved by technology

[0004] The present invention aims to solve the above-mentioned problems existing in the existing switching power supply, and provides a continuously adjustable variable-structure constant-power power supply that works in series at high-voltage output and in parallel at high-current output

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