Quick stepless adjustable voltage stabilizer utilizing IGBT chopper

Abstract

The invention discloses a quick stepless adjustable voltage stabilizer utilizing an IGBT chopper. The quick stepless adjustable voltage stabilizer comprises an isolation transformer T1; a power side phase line is output from a load through a secondary coil of the isolation transformer T1; a primary coil of the isolation transformer T1 is in series connection with a supply side phase line through achopping IGBT module S1; the chopping IGBT module S1 is in series connection with a freewheeling IGBT module S2; both the chopping IGBT module S1 and the freewheeling IGBT module S2 are in parallel connection with non-inductive adsorption capacitors. According to the quick stepless adjustable voltage stabilizer, target voltage can be adjusted steplessly through the PID (proportion integration differentiation) operation according to feedback value and set value of output voltage so that the purpose of keeping the output voltage constant at the set value is achieved, with the ms-level responsespeed. The quick stepless adjustable voltage stabilizer has the advantages of control easiness, small size, low cost, stepless adjustment and high adaptability, and is a voltage stabilizing device with high practicability suitable for different occasions. Besides, since a fast Fourier transformation calculating circuit and control and display circuits are built in the voltage stabilizer, multiplevoltage stabilizers can be connected in series to achieve combination and expansion and the like.

Description

technical field [0001] The invention relates to a voltage stabilizer, in particular to a fast stepless adjustable voltage stabilizer using IGBT chopping. Background technique [0002] At present, in the field of electric power, electric equipment is increasing day by day. However, due to the aging and development lag of power transmission and distribution facilities, as well as poor design and insufficient power supply, the voltage of end users is too low, while the voltage of front-end users is often too high, which affects the normal operation of the load. Unstable voltage will cause damage or malfunction of the equipment, affecting production, unstable quality and other losses. Therefore, the use of a voltage stabilizer is essential for electrical equipment, especially high-tech and precision equipment with strict voltage requirements. [0003] At present, the voltage stabilizer equipment commonly used in the market includes compensation type power voltage stabilizer, c...

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Problems solved by technology

[0003] At present, the voltage stabilizer equipment commonly used in the market includes compensation type power voltage stabilizer, contact type auto-coupling voltage stabilizer, high-power electric column type voltage regulator, etc. ; The non-contact voltage regulator has complex structure, high cost, and serious harmonics; all of them have certain disadvantages, which can no longer meet the needs of the market

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