CN2729995Y

CN2729995Y - Uninterruption power source

Info

Publication number: CN2729995Y
Application number: CN 200420068189
Authority: CN
Inventors: 王卫国; 吴贵明; 李德元
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-20
Filing date: 2004-07-20
Publication date: 2005-09-28
Anticipated expiration: 2014-07-20

Abstract

The utility model discloses an uninterrupted power source. An input filter, a rectifier filter, an inverter, a transfer switch, an output filter and a microprocessor are arranged in the uninterrupted power source. The uninterrupted power source is characterized in that a non-standard control circuit is also arranged between the microprocessor and the rectifier filter. The non-standard control circuit comprises an AC input detection circuit, a DC bus detection circuit, a pulse-width control assembly and the driving circuit of a pulse-width modulation switch. After the utility model switches in non-standard output commercial power or is connected with non-standard input load, under the situation of guaranteeing as well as sustaining the normal operation of the load, the accommodation limit of the uninterrupted power source is enlarged; when the uninterrupted power source is used at a normal standard, the uninterrupted power source also satisfies the output status of the commercial power under non-standard voltage synchronously, such as 100V, 110V, 200V, etc., or the request of the non-standard voltage outputs of some imported equipment.

Description

A kind of uninterrupted power supply

Technical field

The utility model relates to a kind of power supply equipment, relates in particular to a kind of uninterrupted power supply of importing off-standard voltage, output off-standard voltage.

Background technology

Uninterrupted power supply (ups) Unity on the present domestic market, be that input and output by the unidirectional 220V of normal voltage, three-dimensional 380V design, and can not be suitable for for the civil power output situation of some off-standard voltages such as 100V, 110V, 200V etc. or the requirement of some import equipment off-standard voltages input, because the working method of inverter adopts the power frequency processing mode, it is bigger therefore disturbed by utility grid simultaneously.

The utility model content

The purpose of this utility model is to provide a kind of above-mentioned defective that remedies existing uninterrupted power supply, satisfies off-standard voltage input and output and the high uninterrupted power supply of output stabilization efficiency.

The purpose of this utility model is achieved in that civil power connects load by input filter, rectifier filter, inverter, change over switch and the output filter that is arranged in the uninterrupted power supply.The output of input filter divides three the tunnel: leading up to charger, storage battery and DC/DC transducer is connecting inverter; One the tunnel connects change over switch; Another road connects rectifier filter; In this uninterrupted power supply, also be provided with microprocessor, this microprocessor connects DC/DC transducer and inverter, also be provided with nonstandard control circuit between described microprocessor and rectifier filter, described nonstandard control circuit comprises interchange input detecting circuit, dc bus testing circuit, pulsewidth adjustment assembly and pwm switch drive circuit.

After the utility model inserts non-standard output civil power or connects non-standard input load, keep under the situation of load operate as normal in assurance, enlarge its accommodation, when arm's length standard is used, also satisfy the civil power output situation of off-standard voltage such as 100V, 110V, 200V etc. or the requirement of some import equipment off-standard voltages input.

Description of drawings

Fig. 1 is the structured flowchart among the utility model embodiment;

Fig. 2 is the nonstandard control circuit structure chart among Fig. 1.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

With reference to Fig. 1.In uninterrupted power supply, be provided with input filter 1, rectifier filter 2, inverter 3, change over switch 4 and output filter 5.The output of described input filter 1 divides three the tunnel: leading up to charger 6, storage battery 7 and DC/DC transducer 8 is connecting inverter 3; One the tunnel connects change over switch 4; Another road connects rectifier filter 2.Also be provided with microprocessor 9 in this uninterrupted power supply, this microprocessor connects DC/DC transducer 8 and inverter 3, is provided with nonstandard control circuit 10 between described microprocessor 9 and rectifier filter 2.

With reference to Fig. 2.In nonstandard control circuit, the leading-in end 21 of external mains supply is being connected in series resistance R 5 and inductance L, the output of resistance R 5 connects accurate wave detector 22 inputs of active forward, the output of this wave detector 22 is drawn two-way, one the tunnel is connected on pulsewidth adjusts on the 6th pin of assembly 24, and the 8th pin of this assembly 24 is inserted on another road by root mean square testing circuit 23; Between leading-in end and inductance L, an instrument transformer CT is installed, this instrument transformer has been formed with bridge rectifier BR2 and has been exchanged input detecting circuit 25, and this circuit 25 is transported to the 4th pin that pulsewidth is adjusted assembly 24 with the AC signal that detects.

Inductance L is connected with dc bus testing circuit 26, this testing circuit 26 is made up of diode, resistance, electric capacity, wherein the positive pole of the negative pole of diode D1, diode D2 connects inductance L, electrochemical capacitor C1 is in parallel with the resistance R 1, the R2 that are connecting, the positive pole of the output terminating diode D1 of electrochemical capacitor C1, exit herein is a dc bus negative output terminal 27; Electrochemical capacitor C2 is in parallel with the resistance R 1, the R2 that are connecting, and the positive pole of electrochemical capacitor C2 connects the negative pole of diode D2, and exit herein is a dc bus positive output end 28; The positive pole of electrochemical capacitor C1 links to each other with the negative pole of electrochemical capacitor C2 and ground connection.

Above-mentioned testing circuit 26 connects DC detector 31, wherein the node between resistance R 1, the R2 29 is connected on the reverse input end of DC detector 31, node 30 between resistance R 3, the R4 is connected on the positive input of DC detector 31, and the output of DC detector 31 is transported to the 11st pin and the 7th pin that pulsewidth is adjusted assembly with the direct current signal that detects; Between the output and the 7th pin of DC detector 31, also can insert the resistance R 5 that capacitor C 3 in a parallel connection, to improve the signal feedback coefficient.

Inductance L is also connecting pwm switch drive circuit 32 simultaneously.This drive circuit comprises bridge rectifier BR1, field effect transistor and photoelectrical coupler TLP, described rectifier BR1 is made up of diode D3～D6, the positive output end of rectifier BR1 links to each other with the drain electrode of field effect transistor, the negative output terminal of rectifier BR1 links to each other with the source electrode of field effect transistor, the grid of field effect transistor meets photoelectrical coupler TLP, photoelectrical coupler TLP receives the signal of adjusting the output of assembly 24 the 16th pin from pulsewidth, is subjected to this pulsewidth to adjust assembly 24 controls.

The 4th pin, the 6th pin, the 7th pin, the 8th pin and the 11st pin that above-mentioned pulsewidth is adjusted assembly 24 are connected with the corresponding controling end of microprocessor.

With 100V, 110V, 200V, 220V, the civil power of 50Hz is an example, when the forward halfwave rectifier filter of civil power by constituting by inductance L, diode D2 and electrochemical capacitor C2, on electrochemical capacitor C2, obtain+160V～+ direct voltage of 300V, this moment is because the effect of aforementioned pwm switch drive circuit 32, above-mentioned forward halfwave rectifier filter becomes the rectifier filter of a booster type, and it is upgraded to+direct voltage of 250V～380V.Reach 25KHz owing to deliver to the frequency of the width-modulation pulse of fet gate simultaneously, far above mains frequencies 50Hz, therefore when mains supply is in positive half cycle, if field effect transistor is in conducting state, when drain electrode-the source electrode of the D3 of inductance current i in the energy storage inductor L that flows through, bridge rectifier BR1, field effect transistor, the D6 among the bridge rectifier BR1, on inductance L, form the positive right negative induced electromotive force in a left side, this moment, diode D2 was in reverse-bias state, and mains supply can not charge to electrochemical capacitor C2.

Otherwise, when the field effect pipe is in cut-off state, the electric current at energy storage inductor L two ends can not transition owing to flow through, then on inductance L, form the negative right positive induced electromotive force in a left side, this induced electromotive force and forward mains supply stack this moment, and charge to electric capacity with the voltage far above civil power, thereby form the charging situation of booster type, therefore on electrochemical capacitor C2, obtain desired high direct voltage.Simultaneously because described pulsewidth is adjusted the effect of assembly 24, make above-mentioned DC power supply in automatic voltage regulation output, can also guarantee the alternating current exported and civil power 50Hz sine voltage same-phase, same frequency.

It is UC3854 that above-mentioned pulsewidth is adjusted assembly 24.

Microprocessor 9 can also pass through serial ports RS232 external inspecting device.

Claims

1, a kind of uninterrupted power supply, be provided with input filter (1), rectifier filter (2), inverter (3), change over switch (4), output filter (5), microprocessor (9), the output of described input filter (1) divides three the tunnel: leading up to charger (6), storage battery (7) and DC/DC transducer (8) is connecting inverter (3); One the tunnel connects change over switch (4); Another road connects rectifier filter (2); It is characterized in that: also be provided with nonstandard control circuit (10) between described microprocessor (9) and rectifier filter (2), described nonstandard control circuit (10) comprises interchange input detecting circuit (25), dc bus testing circuit (26), pulsewidth adjustment assembly (24) and pwm switch drive circuit (32).

2, by the described uninterrupted power supply of claim 1, it is characterized in that: civil power input instrument transformer CT and bridge rectifier BR2 form above-mentioned interchange input detecting circuit (25) by accepting, and this circuit (25) is transported to the AC signal that detects on the 4th pin of pulsewidth adjustment assembly (24).

3, by claim 1 or 2 described uninterrupted power supplys, it is characterized in that: described dc bus testing circuit (26) one ends connect inductance L, pwm switch drive circuit (32), and by DC detector (31) direct current signal that detects are transported to the 11st pin and the 7th pin that pulsewidth is adjusted assembly; Described dc bus testing circuit (26) is made up of diode, resistance, electrochemical capacitor, wherein the positive pole of the negative pole of diode D1, diode D2 connects an inductance L, electrochemical capacitor C1 is in parallel with the resistance R 1, the R2 that are connecting, the positive pole of the output terminating diode D1 of electrochemical capacitor C1, exit herein are dc bus negative output terminal (27); Electrochemical capacitor C2 is in parallel with the resistance R 1, the R2 that are connecting, and the positive pole of electrochemical capacitor C2 connects the negative pole of diode D2, and exit herein is dc bus positive output end (28); The positive pole of electrochemical capacitor C1 links to each other with the negative pole of electrochemical capacitor C2 and ground connection; Node (29) between above-mentioned resistance R 1, the R2 is connected on the reverse input end of DC detector 31, and the node between resistance R 3, the R4 (30) is connected on the positive input of DC detector (31).

4, by claim 1 or 2 described uninterrupted power supplys, it is characterized in that: described pwm switch drive circuit (32) comprises bridge rectifier BR1, field effect transistor and photoelectrical coupler TLP, described rectifier BR1 is made up of diode D3～D6, the positive output end of rectifier BR1 links to each other with the drain electrode of field effect transistor, the negative output terminal of rectifier BR1 links to each other with the source electrode of field effect transistor, the grid of field effect transistor meets photoelectrical coupler TLP, photoelectrical coupler TLP receives the signal of adjusting the output of assembly (24) the 16th pin from pulsewidth, is subjected to pulsewidth to adjust assembly (24) control.

5, by the described uninterrupted power supply of claim 3, it is characterized in that: described pwm switch drive circuit (32) comprises bridge rectifier BR1, field effect transistor and photoelectrical coupler TLP, described rectifier BR1 is made up of diode D3～D6, the positive output end of rectifier BR1 links to each other with the drain electrode of field effect transistor, the negative output terminal of rectifier BR1 links to each other with the source electrode of field effect transistor, the grid of field effect transistor meets photoelectrical coupler TLP, photoelectrical coupler TLP receives the signal of adjusting the output of assembly (24) the 16th pin from pulsewidth, is subjected to pulsewidth to adjust assembly (24) control.

6, by claim 1 or 2 described uninterrupted power supplys, it is characterized in that: it is UC3854 that described pulsewidth is adjusted assembly (24), the signal that its 6th pin, the reception of the 8th pin are exported by root mean square testing circuit (23) from signal and this wave detector (22) of the accurate wave detector of active forward (22) output; The 4th pin, the 6th pin, the 7th pin, the 8th pin and the 11st pin are connected with the corresponding controling end of microprocessor.

7, by the described uninterrupted power supply of claim 3, it is characterized in that: it is UC3854 that described pulsewidth is adjusted assembly (24), the signal that its 6th pin, the reception of the 8th pin are exported by root mean square testing circuit (23) from signal and this wave detector (22) of the accurate wave detector of active forward (22) output; The 4th pin, the 6th pin, the 7th pin, the 8th pin and the 11st pin are connected with the corresponding controling end of microprocessor.

8, by the described uninterrupted power supply of claim 4, it is characterized in that: it is UC3854 that described pulsewidth is adjusted assembly (24), the signal that its 6th pin, the reception of the 8th pin are exported by root mean square testing circuit (23) from signal and this wave detector (22) of the accurate wave detector of active forward (22) output; The 4th pin, the 6th pin, the 7th pin, the 8th pin and the 11st pin are connected with the corresponding controling end of microprocessor.

9, by the described uninterrupted power supply of claim 5, it is characterized in that: it is UC3854 that described pulsewidth is adjusted assembly (24), the signal that its 6th pin, the reception of the 8th pin are exported by root mean square testing circuit (23) from signal and this wave detector (22) of the accurate wave detector of active forward (22) output; The 4th pin, the 6th pin, the 7th pin, the 8th pin and the 11st pin are connected with the corresponding controling end of microprocessor (9).

10, by the described uninterrupted power supply of claim 5, it is characterized in that: described microprocessor (9) can also pass through serial ports RS232 external inspecting device.