CN201758279U

CN201758279U - Anti-countercurrent protection circuit of uninterrupted power system

Info

Publication number: CN201758279U
Application number: CN2010202859445U
Authority: CN
Inventors: 黄瑞坤
Original assignee: EASYMORE INDUSTRIAL Co Ltd
Current assignee: EASYMORE INDUSTRIAL Co Ltd
Priority date: 2010-08-04
Filing date: 2010-08-04
Publication date: 2011-03-09
Anticipated expiration: 2020-08-04

Abstract

An anti-countercurrent protection circuit of an uninterrupted power system comprises a rectifying circuit, an energy storage circuit, a current conversion circuit, a by-pass power source, a power switching device and at least two anti-countercurrent protecting elements. The rectifying circuit receives external power rectifying output, the energy storage circuit is connected with the rectifying circuit and receives and stores rectifying electric power, the current conversion circuit is connected with the energy storage circuit and used for converting power output, the current conversion circuit and the by-pass power source are electrically connected to the power switching device, the power switching device controls switching of power supply output of the by-pass power source or current conversion circuit, the anti-countercurrent protective elements are assembled between the energy storage circuit and the current conversion circuit, are in parallel connection, can prevent countercurrent power from damaging the energy storage circuit and other connected loads when power supply of the by-pass power source is manually switched by mistake, and provides more protection to a capacitor, a storage battery or other loads of the energy storage circuit.

Description

UPS anti-return protective circuit

Technical field

The utility model relates to a kind of UPS anti-return protective circuit, relates in particular to a kind of in order to prevent that the people from being misoperation, the protective device that the isolation bypass supply refluxes.

Background technology

The reliability of electric power system and power supply unit itself; it is an epochmaking ring in the many subjects under discussion of power quality always; yet UPS takes place in power supply process unusually; and cause relevant power consumption equipment shutdown, produce pause, finance paralysis (financial transaction market computer down), public transportation confusion etc., allow life security, finance and surrounding environment endure threat to the fullest extent.

Existing common UPS, if the people is taken place is that misoperation is with the bypass supply conducting, between accumulator and converter, there is not the design that prevents and isolate the bypass supply backflow, cause the storage battery and the capacitor of UPS, damaged by the backflow power supply, increase the maintenance cost of damaging and jeopardize the safety of electricity consumption own.

The utility model content

The utility model UPS anti-return protective circuit for overcoming existing UPS in normal operation, can't be isolated the people and be misoperation conducting bypass supply, bypass supply is refluxed cause the problem of capacitor and battery damage.

It is as follows that the utility model solves the problems of the technologies described above the technical scheme of being taked:

The utility model provides a kind of UPS anti-return protective circuit, comprising: a rectification circuit, described rectification circuit are accepted the electric power and the rectification output of an external power source, are provided with high-pressure side and low-pressure end at its output; One accumulator is connected between the high-pressure side and low-pressure end of rectification circuit, and the electric power after the reception rectification also stores; One converter circuit; high-pressure side and low-pressure end by rectification circuit connect accumulator; also comprise a bypass power supply and at least two anti-return protection components; described bypass supply is connected with the output electric property of converter circuit; and described at least two anti-return protection components interconnect with parallel way; and be connected between accumulator and the converter circuit, can prevent that the bypass supply backflow from damaging accumulator.

UPS anti-return protective circuit described in the utility model, wherein, described anti-return protection component is a diode.

UPS anti-return protective circuit described in the utility model, wherein, described anti-return protection component is the semiconductor element of unidirectional conducting.

UPS anti-return protective circuit described in the utility model, wherein, described anti-return protection component is located at high-pressure side.

UPS anti-return protective circuit described in the utility model, wherein, described anti-return protection component is located at low-pressure end.

UPS anti-return protective circuit described in the utility model, wherein, described anti-return protection component is located at high-pressure side and low-pressure end simultaneously.

That is to say, be provided with the anti-return protection component between accumulator and converter circuit, in the time of can preventing the locking system normal operation, the people is a misoperation conducting bypass supply, causes power supply to reflux and damage toward accumulator and other loads.

The utility model anti-return protection component can be in parallel a plurality of, to avoid single anti-return protection component fault open circuit, cause UPS output outage; The anti-return protection component can effectively be taken precautions against the people for misoperation makes the conducting of bypass service switch, and bypass supply can't be refluxed toward accumulator, to capacitor, storage battery or other many one decks of load protective effects of accumulator, to improve the safety of electricity consumption own.

In addition, described anti-return protection component can be the semiconductor element of diode or unidirectional conducting, and can be located at the high-pressure side or the low-pressure end of rectification circuit, or is located at the high-pressure side and the low-pressure end of rectification circuit simultaneously, all can reach the effect that prevents that bypass supply from refluxing.

By above-mentioned explanation, the utlity model has following beneficial effect:

The anti-return protection component the position is set, make things convenient for the configuration of user's design circuit.

2. the parallel connection of anti-return protection component design can avoid single failure of removal to cause UPS output outage.

3. the anti-return protection component can effectively prevent in the System Operation, and the people is a misoperation conducting bypass supply, the damage of the accumulator that causes and other loads.

Description of drawings

Fig. 1 is the utility model UPS anti-return protective circuit Organization Chart.

Fig. 2 is the utility model normal power supply running figure.

Fig. 3 switches bypass supply running figure for the utility model.

Fig. 4 switches bypass service switch maintenance running figure for the utility model.

Fig. 5 is the utility model UPS anti-return protective circuit running figure.

Fig. 6 is arranged at the low-pressure end circuit diagram for the utility model anti-return protection component.

Fig. 7 is arranged at high-pressure side and low-pressure end circuit diagram simultaneously for the utility model anti-return protection component.

Embodiment

Please refer to shown in Figure 1ly, the utility model UPS anti-return protective circuit comprises a rectification circuit 1, an accumulator 2, a converter circuit 3, a bypass power supply 5, at least two anti-return protection components 6 and a power transfer device 7, wherein:

Please refer to Figure 1 and Figure 2, a rectification circuit 1 is accepted the electric power and the rectification output of an external power source 4, is provided with high-pressure side 11 and low-pressure end 12 at output, supplies electric power thus and gives accumulator 2.

One accumulator 2 is connected between the high-pressure side 11 and low-pressure end 12 of rectification circuit 1, and the electric power after the reception rectification also stores, and accumulator 2 comprises a capacitor 21 and a storage battery 22; Described capacitor 21 and storage battery 22 outputs in parallel.

One converter circuit 3, high-pressure side 11 and low-pressure end 12 connection accumulators 2 by rectification circuit 1 are used for conversion electric power output.

One bypass power supply 5 is another power supply source of UPS, and bypass supply 5 is connected with the output electric property of converter circuit 3.

Please refer to Figure 1 and Figure 2, at least two anti-return protection components 6, described anti-return protection component 6 interconnects with parallel way, and be connected at the high-pressure side 11 between accumulator 2 and the converter circuit 3, can prevent that bypass supply 5 is back to accumulator 2, causes the damage of storage battery 22 and capacitor 21; The parallel connection design of anti-return protection component 6 can be avoided single anti-return protection component 6 faults open circuit, causes UPS output outage; Described anti-return protection component 6 can be the semiconductor element of diode or unidirectional conducting.

Please refer to Figure 1 and Figure 2, one power transfer device 7, described converter circuit 3 is electrically connected at power transfer device 7 with bypass supply 5, may command is switched by bypass supply 5 or converter circuit 3 power supply outputs, power transfer device 7 comprises a bypass service switch 71, two hand switches 72, a control switch 73 and an automatic switch 74, described bypass service switch 71 is connected to power transfer device 7 outgoing positions by bypass supply 5 inputs, for supplying to switch direct service switch by bypass supply 5 power supply usefulness; Two hand switches 72, wherein a manual switch 72 is located at bypass supply 5 at bypass service switch 71 downstream parts, and another hand switch 72 is located at bypass supply 5 and is electrically connected outgoing position with converter circuit 3; Described control switch 73 is located at bypass supply 5 at hand switch 72 downstream parts; Described automatic switch 74 is located at converter circuit 3 downstream outputs place.

Please refer to Fig. 2 and shown in Figure 3, the utility model is when normal operation, bypass service switch 71 is a not on-state, two hand switches 72 and automatic switch 74 are conducting state, when converter circuit 3 is supplied the out-put supplies instability or is had a power failure unusually, conducting control switch 73 changes by bypass supply 5 power supply immediately, and control automatic switch 74 is not on-state, finishes to drop into earlier the commentaries on classics power supply process that afterwards cuts off and allow export and do not cut off the power supply.

Please refer to shown in Figure 4, when carrying out maintenance activity, changeable bypass service switch 71 conductings, and by hand switch 72 not conductings, make power supply by bypass supply 5 through the 71 power supply outputs of bypass service switch, be maintenance normal operation flow process.

Please refer to shown in Figure 5; during normally by converter circuit 3 power supply runnings; if the people is taken place is that misoperation is with 71 conductings of bypass service switch; make bypass supply 5 flow to output and 3 backflows of past converter circuit by bypass service switch 71; yet; because being arranged, anti-return protection component 6 can prevent that the backflow power supply continues toward rectification circuit 1; accumulator 2 and other loads 8 are flowed; the power supply of avoiding refluxing causes the infringement that can not expect to other equipment; increase maintenance cost and jeopardize the safety of electricity consumption own; anti-return protection component 6 has the effect of unidirectional isolation, to the protective effect of accumulator one deck more than 2.

Please refer to shown in Figure 6ly, the anti-return protection component also can be located at the low-pressure end 12 of rectification circuit 1, or please refer to shown in Figure 7ly, is located at the high-pressure side 11 and the low-pressure end 12 of rectification circuit 1 simultaneously, and the mode of above-mentioned installing all can reach the effect that prevents that bypass supply 5 from refluxing.

Anti-return protection component 6 of the present utility model in sum can promote the processing safety of UPS and can avoid UPS because of infringement that human negligence caused.

Claims

1. UPS anti-return protective circuit comprises: a rectification circuit (1), described rectification circuit are accepted the electric power and the rectification output of an external power source (4), are provided with high-pressure side (11) and low-pressure end (12) at its output; One accumulator (2) is connected between the high-pressure side (11) and low-pressure end (12) of rectification circuit (1), and the electric power after the reception rectification also stores; One converter circuit (3); high-pressure side (11) and low-pressure end (12) by rectification circuit (1) connect accumulator (2); it is characterized in that: also comprise a bypass power supply (5) and at least two anti-return protection components (6); described bypass supply (5) is connected with the output electric property of converter circuit (3); and described at least two anti-return protection components (6) interconnect with parallel way; and be connected between accumulator (2) and the converter circuit (3), can prevent that bypass supply (5) backflow from damaging accumulator (2).

2. UPS anti-return protective circuit according to claim 1 is characterized in that: described anti-return protection component (6) is a diode.

3. UPS anti-return protective circuit according to claim 1 is characterized in that: described anti-return protection component (6) is the semiconductor element of unidirectional conducting.

4. UPS anti-return protective circuit according to claim 1 is characterized in that: described anti-return protection component (6) is located at high-pressure side (11).

5. UPS anti-return protective circuit according to claim 1 is characterized in that: described anti-return protection component (6) is located at low-pressure end (12).

6. UPS anti-return protective circuit according to claim 1 is characterized in that: described anti-return protection component (6) is located at high-pressure side (11) and low-pressure end (12) simultaneously.