Switch electric power apparatus

Abstract

The invention discloses a technical proposal of a switch power supply device. The device is based on a resonance circuit. The device simultaneously uses a consequent mode and a retrace scanning mode and also the resonance circuit so as to generate a high frequency alternating current power supply for driving load. The device comprises a transformer, a switching tube, a capacitor, a pulse circuit and the like; wherein in the breakover stage of the switching tube, an input power supply outputs energy to the load by the transformer and the capacitor, and simultaneously the input power supply stores the energy in the transformer; in the stopping stage of the switching tube, the energy stored in the transformer is output to the load by the capacitor.

Description

technical field [0001] The invention relates to a circuit structure of a switching power supply device, in particular to a circuit structure of a transformer in the switching power supply device. Background technique [0002] In switching power supply technology, the commonly used circuits are: forward (forward) type, flyback (flyback) type, half-bridge circuit, full-bridge circuit and push-pull circuit, etc.; the efficiency of the power supply structure mentioned above is 90 % or less; for loads that require high-voltage starting (ignition), such as gas discharge lamps: fluorescent lamps, low-pressure sodium lamps, high-pressure sodium lamps, and metal halide lamps, it is necessary to add additional starting circuits, such as lighting fluorescent lamps. Capacitor series resonant circuit generates high voltage to ignite fluorescent lamps. Low-pressure sodium lamps, high-pressure sodium lamps, metal halide lamps, etc. generally use full-bridge or half-bridge plus high-voltage...

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Problems solved by technology

[0002] In switching power supply technology, the commonly used circuits are: forward (forward) type, flyback (flyback) type, half-bridge circuit, full-bridge circuit and push-pull circuit, etc.; the efficiency of the power supply structure mentioned above is 90 % or less; for loads that require high-voltage starting (ignition), such as gas discharge lamps: fluorescent lamps, low-pressure sodium lamps, high-pressure sodium lamps, and metal halide lamps, it is necessary to add additional starting circuits, such as lighting fluorescent lamps. Capacitor series resonant circuit generates high voltage to ignite fluorescent lamps. Low-pressure sodium lamps, high-pressure sodium lamps, metal halide lamps, etc. generally use full-bridge or half-bridge plus high-voltage triggers to start the ignition circuit. These circuits are not very complicated and the cost is extremely high, but the circuit stability is extremely poor , short life, especially easy to burn (such as commercially available energy-saving lamps)

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