Single-stage multi-staggered AC HID switch power supply

Abstract

The invention provides a single-stage multi-staggered AC HID switch power supply. The single-stage multi-staggered AC HID switch power supply comprises a power conversion circuit and a signal controlcircuit, wherein the power conversion circuit comprises an AC input EMC unit, a left staggered bridge arm unit, a right staggered bridge arm unit, a left inductance unit, a right inductance unit and an ignition output unit, and the signal control circuit comprises a signal acquisition unit, a first switch signal driving unit, a second switch signal driving unit and a primary signal interface unit.With the adoption of the single-stage multi-staggered structure, a power factor correction stage and a power output stage are integrated to from a stage, the bridge arm of a main circuit form a multi-staggered structure by a parallel mode, the switch stress applied to the switch tube is reduced, the output power is doubled, and an HID lamp power supply with large power output is achieved.

Description

technical field [0001] The invention relates to the technical field of power supplies, in particular to a single-stage multi-interleaved AC HID (gas discharge) switching power supply. Background technique [0002] The HID lamp produces an arc and emits light by breaking down the inert gas and metal vapor filled in the lamp tube by the ignition voltage of several thousand volts from the electrodes at both ends. Although HID lamps are not environmentally friendly (the manufacturing materials of HID lamps pollute the environment) and have a slightly shorter lifespan, they are obviously cheaper than LED lamps. In addition, it cannot be applied to jewelry stores and other places), and is more suitable for high-power lighting. [0003] Since the HID lamp needs to break down the inert gas or metal vapor when it is started, the HID lamp needs a special circuit to provide a voltage higher than 2000V to start, and after it is started, it needs to provide a stable alternating current ...

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Problems solved by technology

[0004] At present, the HID lamp power supply has the following problems: (1) The power is not large; the output of the current HID lamp power supply is generally small, and although the power of the circuit using the traditional magnetic ballast can be increased, the efficiency and power factor cannot (2) Low efficiency; many power supply manufacturers on the market claim that their power supply efficiency reaches 95%, but in fact this is only the highest efficiency at 50% load, and the lowest efficiency is only more than 80%; (3) High cost; the current HID lamp power supply generally adopts a two-stage topology, namely the power factor correction stage and the power conversion stage

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