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Output-power-adjustable direct-current inverter

A technology of inverter and DC power supply, applied in the direction of output power conversion device, conversion of AC power input to DC power output, electrical components, etc., can solve the problems of people's normal work, life and study troubles, and achieve high conversion efficiency , fewer external components, simple circuit structure

Inactive Publication Date: 2012-12-26
刘喆
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Once the power supply is interrupted at night, it will bring great trouble to people's normal work, life and study

Method used

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  • Output-power-adjustable direct-current inverter

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Embodiment Construction

[0018] According to attached figure 1 The circuit working principle diagram and accompanying drawings of the adjustable output power DC inverter are shown, and the implementation is carried out according to the connection relationship between the components in the circuit described in the summary of the invention and the technical parameter requirements of the components described in the implementation mode. The present invention can be realized.

[0019] Selection of components and their technical parameters

[0020] IC1 is a pulse width modulation oscillator circuit, the selected model is SG3524;

[0021] VT1~VT2 are N-channel enhanced field effect transistors, the selected model is IRF1010, the required technical parameters are 50V, 50A, and the packaging form is TO-220;

[0022] The resistance is 1 / 4W metal film resistor, the resistance value of resistor R1 is 4.7kΩ; the resistance value of resistor R2 is 100kΩ; the resistance value of resistor R3 is 10kΩ; the resistance...

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Abstract

The invention discloses an output-power-adjustable direct-current inverter. The direct-current inverter consists of a 12V direct-current power supply, a multi-vibrator circuit, a pulse width modulating circuit, a voltage comparison circuit, a push-pull power amplifying circuit, a booster circuit and a rectangular wave voltage shaping circuit, and is characterized in that the model of a pulse width modulation oscillation circuit IC1 in the multi-vibrator circuit is SG3524. The direct-current inverter is a standby power supply which is independent of a commercial power grid. The output-power-adjustable direct-current inverter disclosed by the invention is suitable for equipment such as general illuminating equipment, computers and electronic instruments, can be taken as a temporary emergency power supply for use during short-time power failure of a power supply circuit, and is suitable for emergency illumination or fire-fighting emergency power supplies at various public places. The output-power-adjustable direct-current inverter has the characteristics of simple circuit structure, small quantity of peripheral elements, high conversion efficiency, small temperature rise in a rated power range, output power being up to 400W, and adjustability of the output power of the inverter by modulating the pulse width through an external potentiometer.

Description

technical field [0001] The invention belongs to the technical field of electronics and emergency power supply, and relates to a DC inverter with adjustable output power. Background technique [0002] Once the power supply is interrupted at night, it will bring great trouble to people's normal work, life and study. The DC inverter is a backup power source independent of the mains power grid. It is more realistic and feasible to use the battery as the power source and apply the inverter technology to deal with the temporary power failure of the power supply line. [0003] The adjustable output power DC inverter of the present invention is suitable for electrical equipment such as general lighting equipment, computers, electronic instruments, etc., and can be used as a temporary emergency power supply when the power supply line is cut off for a short time, and is also suitable for emergency response in various public places. Lighting or fire emergency power supply. [0004] T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/538
Inventor 刘喆
Owner 刘喆
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