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Impact-resistant controller for startup of variable frequency power supply

A variable frequency power supply and anti-shock technology, which is applied to electrical components, output power conversion devices, etc., can solve the problems of high DC current overshoot, difficulty in starting vibration, and inconvenient start-up of equipment, so as to prevent start-up shock and make the design simple and easy The effect of fewer rows and fewer components

Active Publication Date: 2017-12-08
HUAIBEI PINGXIANG ELECTRIC FURNACE
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These large-scale parallel resonant frequency conversion equipment are found in use, the start-up is often not ideal, and the heavy-duty start-up DC current often has a high overshoot, which makes it difficult to start the vibration. It needs to be started by an experienced operator. Inconvenience caused by device startup

Method used

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  • Impact-resistant controller for startup of variable frequency power supply
  • Impact-resistant controller for startup of variable frequency power supply

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] like figure 1 , 2 As shown, a variable frequency power supply start-up anti-shock controller includes a non-inverting input operational amplifier unit, a limiter unit, an adjustment range unit, and a switch unit; the adjustment range unit is connected to the limiter unit, and is fed back to the output terminal of the non-inverted input operational amplifier unit. The signals are input to the limiting unit together, and the limiting unit outputs the processed signal to the switch unit, and the switch unit is connected to the non-inverting input operational amplifier unit, and the output of the non-inverting input operational amplifier unit is used for power adjustment.

[0013] The switch control unit is composed of a resistor R2, a transistor Q1, and a diode D1. One end of the resistor R2 is connected to the frequency conversion establishment signal, the other end is connected to the base of the transistor Q1, and the emitter of the transistor Q1 is connected to the ano...

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PUM

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Abstract

The invention discloses an impact-resistant controller for startup of a variable frequency power supply. The impact-resistant controller comprises an in-phase input operation amplification unit, an amplitude limiting unit, a range adjustment unit and a switch unit, wherein the range adjustment unit is connected with the amplitude limiting unit, and the range adjustment unit and a feedback signal of an output end of the in-phase input operation amplification unit are together input into the amplitude limiting unit; the amplitude limiting unit outputs a processing signal to the switch unit; the switch unit is connected with the in-phase input operation amplification unit; the in-phase input operation amplification unit outputs for power adjustment. The impact-resistant controller disclosed by the invention has few components, is simply designed and is feasible; moreover, startup impact of the variable frequency power supply can be effectively prevented.

Description

technical field [0001] The invention relates to a start-up anti-impact controller of a variable frequency power supply, which is mainly used in a parallel resonant variable frequency power supply with a power of more than 3000KW. Background technique [0002] Due to the needs of economic development, large-tonnage frequency conversion melting furnaces are more and more widely used. At present, many manufacturers have produced parallel resonant frequency conversion equipment above 20T. These large-scale parallel resonant frequency conversion equipment are found in use, the start-up is often not ideal, and the heavy-duty start-up DC current often has a high overshoot, which makes it difficult to start the vibration. It needs to be started by an experienced operator. Device startup is inconvenient. Contents of the invention [0003] In view of the above-mentioned main technical problems, the purpose of the present invention is to provide an anti-shock controller for startin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/36
CPCH02M1/36
Inventor 史万平
Owner HUAIBEI PINGXIANG ELECTRIC FURNACE
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