Inverter power supply device

Abstract

The invention discloses an inverter power supply device. The circuits sequentially consist of a low frequency oscillator circuit, a circuit consisting of a pulse distributor, a pulse duty ratio control switch, a high frequency oscillator and two paths of power control switches, a circuit consisting two distributors and a booster transformer, a reversion and filtration circuit, a voltage sampling circuit, a voltage stabilization and amplification circuit, an overload protection circuit, a fault protection circuit and a shell, wherein the reversion and filtration circuit is formed by serially connecting two ends of two inversely and parallelly connected silicon-controlled rectifiers first with coupled coils and then with parallelly connected capacitors. In the device, frequency-division technology and pulse width program modulation circuit as well as power switch tubes and a booster transformer circuit are adopted, high-frequency pulse width grows from small to big and from big to smalland finally to zero , two sets of power switch tubes operate alternately, and a pulse width-variable high-frequency voltage of which the polarity varies at a speed of 50Hz on the secondary side of thetransformer. The inverter power supply device is a low-frequency inverter power supply which is high in voltage stabilization performance, small in frequency variation and large in output power and has an output waveform of sine waves.

Description

1. Technical field [0001] The invention relates to the field of power supplies, in particular to an inverter power supply device. 2. Background technology [0002] At present, the inverter power supply uses a square wave as the output waveform, and uses a low-frequency oscillating circuit to generate a 50HZ square wave as a signal, and drives the power switch tube to make it work in a 50HZ switching state. The effective value of the output voltage after boosting is 220V AC square wave, this type of inverter power supply has no voltage stabilization link, and the output voltage fluctuates greatly with the change of load. [0003] In order to overcome the above disadvantages, the purpose of this utility model is to provide a low-power inverter power supply whose output waveform is a sine wave. 3. Contents of the invention [0004] In order to overcome the above defects, the present invention provides an inverter power supply device with high voltage stabilizing performance,...

AI Technical Summary

Problems solved by technology

[0002] At present, the inverter power supply uses a square wave as the output waveform, and uses a low-frequency oscillating circuit to generate a 50HZ square wave as a signal, and drives the power switch tube to make it work in a 50HZ switching state. The effective value of the output voltage after boosting is 220V AC square wave, this type of inverter power supply has no voltage stabilization link, and the output voltage fluctuates greatly with the load change

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