Cascade voltage stabilization sine resonance high-voltage power supply

Abstract

The invention discloses a cascade voltage stabilization sine resonance high-voltage power supply. The high-voltage power supply comprises a non-isolated pre-voltage-stabilizing circuit, a high-frequency sine resonance circuit, a high-frequency transformer, a high-voltage rectifying and filtering circuit and a voltage-stabilizing sampling feedback part; the non-isolated pre-voltage-stabilizing circuit regulates the output voltage according to a voltage signal fed back by the voltage-stabilizing sampling feedback part and sends the voltage to the post-stage high-frequency sine resonance inversion and boost conversion rectification circuit, and the high-frequency sine resonance circuit is in an open-loop state; and the pre-stage non-isolated pre-voltage-stabilizing circuit is adjusted through sampling of the output voltage, so that voltage-stabilizing closed-loop feedback of the output voltage of the whole high-voltage power supply is realized. The pre-stage voltage pre-stabilizing circuit adopts the four-switch buck-boost converter and can adapt to a wide input power supply range, the post-stage cascaded sine resonant converter realizes soft switching of a switching transistor of a main power conversion part, the switching frequency and the conversion efficiency of the high-voltage power supply are improved, and the power supply has the characteristics of wide input voltage range, miniaturization, high frequency, high efficiency, high reliability and the like.

Description

technical field [0001] The invention belongs to the technical field of high-voltage power supplies, in particular to a high-voltage power supply with cascaded voltage stabilization and sinusoidal resonance. Background technique [0002] With the rapid development of semiconductor power devices, the demand for industrial products is gradually increasing, and the miniaturization trend of high-voltage power supplies is intensifying. In response to the design requirements for miniaturization, the high-frequency and soft-switching technologies of high-voltage power supplies are constantly developing and innovating. Among them, the phase-shifted full-bridge topology is the classic circuit structure of high-frequency soft-switching high-voltage power supplies. [0003] However, in high-voltage power supplies, due to the large distribution parameters of high-voltage transformers such as distributed capacitance and leakage inductance and the large parasitic parameters of high-voltage...

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Problems solved by technology

[0003] However, in high-voltage power supplies, due to the large distribution parameters of high-voltage transformers such as distributed capacitance and leakage inductance and the large parasitic parameters of high-voltage power devices, the engineering of phase-shifted full-bridge topology in high-voltage power supplies often has reliability problems caused by bridge arm interference. , light load is difficult to achieve soft switching and the frequency is difficult to greatly increase and other issues

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