CN2283886Y

CN2283886Y - AC regulation type DC regulated power supply

Info

Publication number: CN2283886Y
Application number: CN 96235285
Authority: CN
Inventors: 刘子武; 段根明
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-07-17
Filing date: 1996-07-17
Publication date: 1998-06-10
Anticipated expiration: 2006-07-17

Abstract

The utility model relates to an electricity supplying and changing device, particularly an AC regulation type DC voltage stabilizing power supply which comprises an AC regulation circuit composed of an autotransformer, a thyristor, etc., and a sampling enlarging modulation circuit composed of a transformer, a rectifying filter circuit and an operational amplifying integrated circuit block. The sampling enlarging modulation circuit is connected to the thyristor of a regulation circuit so as to carry out adjustment and control. Compared with a common DC regulation type DC voltage stabilizing power supply, the utility model has the advantages of few elements, high accuracy of voltage stabilizing and low cost. The utility model is suitable to various occasions which need stabilized voltage and direct current.

Description

Exchange the regulation type direct current stabilized voltage supply

For transformation device, be specifically related to a kind of D.C. regulated power supply.

Existing D.C. regulated power supply, common form has: controllable silicon phase control type, connect linear adjustment type and HF switch type.Controllable silicon phase control type is to reach voltage stabilizing output purpose with controllable silicon as controlled rectification, and the linear adjustment type of connecting is that string has voltage regulator circuit between rectification and dc output end, and the pressure drop that changes regulating loop by linearity reaches the output voltage stabilizing; The HF switch type claims time ratio control change type power supply again.Wherein the controllable silicon phase control-type needs bigger DC filtering inductance and high capacity filter capacitor, and the rectifier transformer margin of power is big, and is many with material, and the complete machine bodily form is big and heavy; Series connection linear regulation voltage regulation type is limit by the semiconductor device technology making, and electric current and voltage is not allowed to be easy to do too highly, and the power consumption height, and thermal value is big, and efficient is low, only is fit to low power demand; And high-frequency switching power supply, though effective, the circuit complexity, it is high that element requires, too expensive, and above-mentioned three kinds of adjusting types are DC loop and regulate, and do not see to adopt to exchange adjustment type the D.C. regulated power supply that the simple cost of circuit is low.

The purpose of this utility model is that the simple components and parts of a kind of circuit of proposition are few, precision of voltage regulation height, and noise is low, and cost is low, exchanges the D.C. regulated power supply of adjustment type.

The interchange regulation type direct current stabilized voltage supply that the utility model proposes is to take out error signal from dc output end, through feedback circuit the alternating voltage of input end is done corresponding the adjusting, reaches the purpose of stable DC voltage output.

The interchange regulation type direct current stabilized voltage supply of the utility model design, include transformer, alternating voltage regulating circuit, current rectifying and wave filtering circuit and sampling amplification modulating circuit etc., it is characterized in that the alternating voltage regulating circuit is by autotransformer, controllable silicon and inductance capacitance are formed, the sampling amplification modulating circuit adopts the amplifier integrated circuit block, the positive pole of the input termination current rectifying and wave filtering circuit of sampling amplification modulating circuit, the silicon controlled control utmost point of output termination AC regulating circuit.

The interchange regulation type direct current stabilized voltage supply that the utility model proposes is compared with existing advanced high frequency switch type D.C. regulated power supply, and the precision of voltage regulation will exceed the order of magnitude half: AC ripple reduces half.And employing natural heat dissipation, complete machine remain on low-temperature condition work, the reliability height, and cost is low, and components and parts are few, and the single-machine capacity capacity improves more than ten times.

Further specify below in conjunction with accompanying drawing

Fig. 1 exchanges the block diagram of regulation type direct current stabilized voltage supply.

Fig. 2 exchanges regulation type direct current stabilized voltage supply conspectus.

As shown in Figure 1, Alternating Current Power Supply, transfers direct current to by rectifying and wave-filtering and takes out signal from dc output end to transformer through AC regulating circuit, amplifies through sampling to feed back to AC regulating circuit adjusting control, finally guarantees DC voltage-stabilizing output.

Exchange among Fig. 2 and regulate circuit, by autotransformer L ₂Capacitor C ₁, C ₂Inductance L ₁Form autotransformer L with controllable silicon K ₂A termination transformer elementary, b termination power live wire, c termination inductance L ₁, inductance L ₁Serial connection controllable silicon K, zero-power line meets silicon controlled other end e, and is connected to the other end of primary, capacitor C ₂With autotransformer L ₂Parallel connection, serial connection controllable silicon K and inductance L ₁With capacitor C ₁The interchange regulating loop is formed in parallel connection; The secondary current rectifying and wave filtering circuit that is connected to of transformer, the positive pole of current rectifying and wave filtering circuit output is connected to by computing amplification circuit IC ₁, IC ₂, IC ₃The sampling amplification modulating circuit that polyphone is formed is to the control utmost point of controllable silicon K.

The interchange adjustable type D.C. regulated power supply line construction simple components of the utility model design is few, cost is low, performance is good, single-machine capacity is much larger than the D.C. regulated power supply of existing various DC adjustment formulas, and is very suitable for modular construction design, intermodule parallel running, be combined into big-and-middle-sized high reliability, power supply system of DC source, dependable performance, applicable situation is extensive.

Claims

1, exchanges the regulation type direct current stabilized voltage supply, include alternating voltage regulating circuit, transformer, current rectifying and wave filtering circuit and sampling amplification modulating circuit etc., it is characterized in that the alternating voltage regulating circuit is made up of autotransformer, controllable silicon and inductance capacitance, the sampling amplification modulating circuit adopts the amplifier integrated circuit, the positive pole of the input termination current rectifying and wave filtering circuit of sampling amplification modulating circuit, the silicon controlled control utmost point of output termination AC regulating circuit.