Pulse width adjustable type inversion system based on overvoltage protection circuit

An overvoltage protection circuit and inverter system technology, applied in the field of electronics, can solve problems such as voltage instability and poor load capacity, and achieve the effects of ensuring stability, improving voltage resistance and dynamic range, and improving stability.

Inactive Publication Date: 2016-12-14
CHENGDU HANDAO TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of unstable output voltage and poor load capacity of the existing inverter system in the prior art, and provide a pulse width adjustable inverter system based on an overvoltage protection circuit

Method used

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  • Pulse width adjustable type inversion system based on overvoltage protection circuit
  • Pulse width adjustable type inversion system based on overvoltage protection circuit
  • Pulse width adjustable type inversion system based on overvoltage protection circuit

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Embodiment

[0022] Such as figure 1 As shown, the present invention mainly consists of an inverter chip U, a transformer T, a triode VT1, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R14, a resistor R24, a polar capacitor C1, a polar capacitor C2, and a polar capacitor C3 , Polar capacitor C17, polar capacitor C18, polar capacitor C19, diode D1, Zener diode D13, inductor L1, inductor L2, pulse width modulation circuit, overvoltage protection circuit, comparison amplifier circuit, voltage detection circuit, and voltage controlled oscillation circuit.

[0023] When connected, the positive pole of the polarity capacitor C1 is connected to the base of the triode VT1, and its negative pole is grounded. The P pole of the diode D1 is connected to the emitter of the triode VT1 after passing through the inductor L1, and its N pole is connected to the negative pole of the polarity capacitor C1 after passing through the resistor R1. One end of the resistor R3 is connected...

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PUM

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Abstract

The invention discloses a pulse width adjustable type inversion system based on an overvoltage protection circuit. The pulse width adjustable type inversion system mainly consists of an inverter chip U, a transformer T, a transistor VT1, a polar capacitor C2, a polar capacitor C19, a polar capacitor C18, a resistor R14, a pulse width modulation circuit, a comparison amplifier circuit, a voltage detection circuit, a voltage controlled oscillation circuit, and the overvoltage protection circuit connected in series between the voltage controlled oscillation circuit and the negative electrode of the polar capacitor C18. The pulse width adjustable type inversion system can increase the voltage withstand capability and dynamic range after inversion, and can control the voltage current intermediate zero point deviation after inversion within 0.5nA, so as to ensure the stability of the AC voltage outputted by the pulse width adjustable type inversion system. The pulse width adjustable type inversion system can reduce the leakage current and loss current of the voltage current during inversion and can restrain the abnormal fluctuation of output current so as to increase the load capacity of the pulse width adjustable type inversion system, that is, the load capacity of the pulse width adjustable type inversion system reaches 80 to 95 percent of the rated load.

Description

technical field [0001] The invention relates to the electronic field, in particular to an adjustable pulse width inverter system based on an overvoltage protection circuit. Background technique [0002] The inverter system converts DC power (battery, storage battery) into AC power (generally 220V, 50Hz sine wave). The inverter system is widely used in air conditioners, home theaters, electric grinding wheels, electric tools, sewing machines, DVD, VCD, computers, TVs, washing machines, range hoods, refrigerators, video recorders, massagers, fans, lighting, etc. With the development of science and technology, the above-mentioned electronic products are also constantly developing, so the requirements for the stability and load capacity of the output voltage of the inverter system are also getting higher and higher. However, the AC voltage output by the existing inverter system is unstable after inversion; and the existing inverter system also has the problem of poor load capac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/48H02H7/122
CPCH02H7/122H02M7/4807H02M7/4818Y02B70/10
Inventor 不公告发明人
Owner CHENGDU HANDAO TECH CO LTD
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