CN202524312U

CN202524312U - Switch power supply possessing alternating current 110/220V automatic switchover function

Info

Publication number: CN202524312U
Application number: CN201220105948XU
Authority: CN
Inventors: 农德行
Original assignee: SHENZHEN FUJIA ELECTRICAL APPLIANCES CO Ltd
Current assignee: SHENZHEN FUJIA ELECTRICAL APPLIANCES CO Ltd
Priority date: 2012-03-20
Filing date: 2012-03-20
Publication date: 2012-11-07
Anticipated expiration: 2022-03-20

Abstract

The utility model provides a switch power supply possessing the alternating current 110/220V automatic switchover function. The switch power supply includes a lightning protection module, an EMI inhibition module, a rectifier and filter module, a main transfer circuit module, and a secondary rectifier module which are connected in order. The input terminal of the lightning protection module is connected with the alternating current. The output terminal of the secondary rectifier module is connected with a load. The switch power supply also includes an automatic switchover switch module which can carry out the automatic detection switchover to different national commercial powers. The automatic switchover switch module is connected with the EMI inhibition module and the rectifier and filter module respectively. The switch power supply can realize the high and low voltage automatic switchover input of the alternating current, so the artificial mistakes are prevented and the power supply can give stable power output to the device. At the same time, the automatic switchover of commercial powers in different area is realized, and the problems and defects of the artificial switch switchover are overcome.

Description

The Switching Power Supply that possesses alternating current 110/220V automatic switching function

Technical field

The utility model relates to Switching Power Supply, relates in particular to a kind of Switching Power Supply that possesses alternating current 110/220V automatic switching function.

Background technology

At present; Switching Power Supply is widely used in daily life, is the important equipment supply power that is, and is divided into the multiple alternating current of high-low pressure at international civil power; As select half-bridge, positive activation type to open up to mend circuit etc., opening up of having mended circuit and can only be realized that hand switch switches and realize exchanging high-low pressure conversion input.At present traditional most normal shock and half-bridge are opened up benefit contactor power supply and are used MTS to realize alternating current high-low pressure conversion input; Thereby this manual switching mode easy error causes power supply to damage, and brings puzzlement and loss for terminal client and technical staff.

Summary of the invention

The purpose of the utility model is to provide a kind of Switching Power Supply that possesses alternating current 110/220Vac automatic switching function, realizes exchanging some high-low pressure automatic switchover input, reduces error rate, reduces the damage to Switching Power Supply, prolongs its useful life.

The purpose of the utility model realizes through following technical scheme:

A kind of Switching Power Supply that possesses alternating current 110/220Vac automatic switching function; Comprise: the lightning protection module that connects successively, EMI inhibition module, rectification filtering module, main transformer change circuit module, secondary commutation module; The input of said lightning protection module connects alternating current; The output of secondary commutation module connects load; Also comprise the automatic transfer switch module that is used for the country variant civil power is detected automatically switching, this automatic transfer switch module suppresses module with said EMI and is connected respectively with rectification filtering module.

Wherein, also comprise and be connected in the secondary commutation module successively and main transformer changes voltage detecting control module, Voltage Feedback control module, PWM control module between the circuit module.

Compared with prior art, the utility model embodiment has following beneficial effect:

Adopt the utility model; Can realize the high-low pressure automatic switchover input of alternating current; Can prevent that manual work from makeing mistakes and can guarantee the stable power devices that is output as of power supply; Meet the different regions civil power simultaneously and automatically switch, overcome civil power 110V/220V and exchanged problem and the shortcoming that exists when artificial diverter switch is used in low high terminal voltage input.

Description of drawings

Fig. 1 is the principle assumption diagram of the Switching Power Supply that provides of the utility model embodiment.

Fig. 2 is the circuit structure diagram of the Switching Power Supply that provides of the utility model embodiment.

Embodiment

For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.

See also Fig. 1, the Switching Power Supply that possesses automatic switching function in the present embodiment mainly comprises: lightning protection module, EMI inhibition module, rectification filtering module, main transformer change circuit module, secondary commutation module, voltage detecting control module, Voltage Feedback control module, PWM control module, automatic transfer switch module.Suppress to input to rectification filtering module after the module through lightning protection module and EMI successively after the electric main input; After rectification filtering module converts direct current to, export to main transformer and change circuit module; After main transformer changes circuit module, export to the secondary commutation module, behind secondary commutation module rectifying and wave-filtering, export to load.

The automatic transfer switch module is connected in EMI and suppresses between module and the rectification filtering module; Be used to realize that the country variant civil power detects automatic switchover; Realize that according to civil power low section voltage or high section voltage the rectifying and wave-filtering series connection is with parallelly connected; Guarantee that enough energy provide stable voltage and electric current for the switch main transformer changes circuit module, guarantee the power supply operate as normal, for equipment provides sufficient energy.The circuit structure of automatic transfer switch module is shown in the frame of broken lines among Fig. 2; When the main 110Vac of realization imports; Utilize the detection input voltage to make controllable silicon SCR 1 automatic conducting, N zero line voltage is connected between capacitor C 3 and the capacitor C 4, and capacitor C 3 realizes also connecting voltage multiplying rectifier with capacitor C 4.; When the 220Vac input; Utilize to detect input voltage controllable silicon SCR 1 is ended, N zero line voltage is not connected between capacitor C 3 and the capacitor C 4, capacitor C 3 and the capacitor C 4 realization halfwave rectifier that realizes connecting. and utilize the conducting of controllable silicon SCR 1 and end and do the automatic transfer switch module.

Particularly, as shown in Figure 2, at first connect to exchange the L line and utilize resistance current limliting and dividing potential drop detection to receive integrated three-terminal voltage-stabilizing pipe U6 benchmark first pin after through diode D17 rectification; Be output as high level and low level through reference voltage after relatively; Control the conducting of DA1 diac and, realize the automatic transfer switch function, when input 110V by making the conducting of two-phase controllable silicon and ending; Behind the voltage process D17 diode rectification; Resistance R 29 and resistance R 28 are taken a sample and are got into integrated three-terminal voltage-stabilizing pipe U6 the 1st pin REF and compare, and integrated three-terminal voltage-stabilizing pipe U6 itself is former when should comparative voltage being lower than benchmark, and the inside triode ends, and the negative electrode tripod presents high level; Voltage stabilizing didoe ZD7 is in forward conduction work; Carry out capacitor C 11 chargings through the voltage of resistance R 26 on another road, and the voltage DA1 that constantly rises triggers two pipe conductings and has electric current to pass through, and meets and sends off the G control utmost point of bidirectional triode thyristor SCR1; Bidirectional triode thyristor SCR1 conducting has electric current to pass through, and the output rectifying and wave-filtering realizes that it is 110*2* (1.414) that voltage multiplying rectifier obtains voltage.When civil power alternating voltage 220V imported, voltage was through behind the D17 diode rectification, and resistance R 29 and resistance R 28 the 1st pin REF that gets into integrated three-terminal voltage-stabilizing pipe U6 that takes a sample compares; Inner triode conducting when should comparative voltage being higher than benchmark that integrated three-terminal voltage-stabilizing pipe U6 itself is former; The negative electrode tripod presents low level, and voltage stabilizing didoe ZD7 is in reverse voltage stabilizing conducting work, and another road voltage charges through 26 pairs of capacitor C 11 of resistance R; Drag down current potential because of voltage stabilizing didoe ZD7 anti-phase voltage stabilizing conducting during the voltage discharge; Make the DA1 diac can't triggering and conducting, bidirectional triode thyristor SCR1 have the Control work electric current and ends, and keeps off state.Back level voltage-multiplying circuit becomes half-wave rectifying circuit.Like this during load open circuit; The about 310V of output direct current during input AC 110V voltage, the about 310V of the output dc voltage of input AC 220V is under the both of these case; The direct voltage that is added to back level voltage stabilizing circuit is more or less the same, and promptly accomplishes the switching of 110V/220V voltage automatically.

The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.

Claims

1. Switching Power Supply that possesses alternating current 110/220V automatic switching function; Comprise: the lightning protection module that connects successively, EMI inhibition module, rectification filtering module, main transformer change circuit module, secondary commutation module; The input of said lightning protection module connects alternating current; The output of secondary commutation module connects load; It is characterized in that, also comprise the automatic transfer switch module that is used for the country variant civil power is detected automatically switching, this automatic transfer switch module suppresses module with said EMI and is connected respectively with rectification filtering module.

2. the Switching Power Supply that possesses alternating current 110/220V automatic switching function as claimed in claim 1; It is characterized in that, also comprise being connected in the secondary commutation module successively and main transformer changes voltage detecting control module, Voltage Feedback control module, PWM control module between the circuit module.