CN2429950Y

CN2429950Y - Uninterrupted power supply with micro-bidirectional current converter

Info

Publication number: CN2429950Y
Application number: CN 00213897
Authority: CN
Inventors: 王友涛; 张振声; 单士臣
Original assignee: Chuangtong Science And Technology Development Co Ltd Qingdao Economic And Te
Current assignee: Chuangtong Science And Technology Development Co Ltd Qingdao Economic And Te
Priority date: 2000-03-11
Filing date: 2000-03-11
Publication date: 2001-05-09
Anticipated expiration: 2010-03-11

Abstract

The utility model relates to an uninterrupted power supply with a bidirectional current converter, which comprises a control part and a main circuit, wherein the main circuit comprises an alternating current input terminal, an alternating current output terminal, a main bidirectional current converter and an accumulator. The utility model is characterized in that the alternating current input terminal is also connected with a low-voltage winding of a micro-transformer; the alternating current terminal of a micro-bidirectional current converter of the uninterrupted power supply is connected with a high-voltage winding of the micro-transformer; the direct current terminal of the micro-bidirectional current converter and the main bidirectional current converter are together connected with the accumulator. The uninterrupted power supply makes a power factor approximately equal to 1, suppresses the harmonic, adjusts the voltage and the current, and makes the energy loss less than or equal to 3%.

Description

Uninterrupted power supply with little bidirectional current converter

The utility model belongs to uninterrupted power supply, is specifically related to the uninterrupted power supply(ups) with power factor compensation.

Before the utility model was made, the effect of power pack was civil power to be transformed into direct current charges a battery or the direct current in the storage battery is transformed into the alternating current powering load in uninterrupted power supply.The current conversion circuit of initial uninterrupted power supply is unidirectional, promptly can only AC-DC or direct current become and exchange as shown in Figure 1, the uninterrupted power supply shortcoming of forming by this unidirectional current translation circuit as shown in Figure 2, energy loss 8～12%, current waveform distortion 30%, and power factor is low.Produced the bidirectional current translation circuit afterwards, promptly a circuit both can carry out direct current change interchange and also can carry out AC-DC; The uninterrupted power supply of being made up of this current conversion circuit as shown in Figure 3, it has had improvement than above-mentioned uninterrupted power supply, but shortcoming is also arranged as shown in Figure 4, and it still has the energy loss below 5%, and power factor changes with the variation of load, civil power, and its power factor is undesirable like this.

The purpose of this utility model is to provide a kind of little bidirectional current converter and little transformer of being provided with to form compensation circuit for addressing the above problem, and realizes power factor compensation function, has the uninterrupted power supply of little bidirectional current converter.

For achieving the above object, the utility model is a kind of uninterrupted power supply with little bidirectional current converter of realizing like this, comprises control section and main circuit, and main circuit is to be made of ac input end, ac output end, main bidirectional current converter and storage battery; Wherein ac input end is connected with the interchange end of ac output end and main bidirectional current converter, and storage battery connects the dc terminal of main bidirectional current converter; Described uninterrupted power supply with little bidirectional current converter also is provided with little transformer and little bidirectional current converter; Described ac input end connects the low pressure winding of this little transformer; The interchange end of described little bidirectional current converter connects the high pressure winding of described little transformer, and the dc terminal of the dc terminal of this little bidirectional current converter and main bidirectional current converter is connected storage battery jointly; Described little transformer and little bidirectional current inverter power coupling.

The power of above-mentioned little bidirectional current converter be above-mentioned main bidirectional current converter 10～25% between.

Advantage of the present utility model and good effect are that uninterrupted power supply of the present utility model as shown in Figure 6 is provided with little converter can regulate power factor, makes the power factor ≈ 1 of this uninterrupted power supply, can also suppress effects such as harmonic wave, pressure regulation (voltage stabilizing), accent stream.Make this uninterrupted power supply no current distortion and energy loss≤3%.

Below in conjunction with accompanying drawing the utility model is described in further detail.

Fig. 1 is the circuit structure diagram that a kind of traditional power pack before the utility model is made constitutes uninterrupted power supply;

Fig. 2 is the working curve of Fig. 1 when working;

Fig. 3 is the circuit structure diagram that a kind of bidirectional current converter constituted uninterrupted power supply before the utility model was made;

Fig. 4 is the working curve of Fig. 3 when working;

Fig. 5 is the circuit structure diagram of an embodiment of the utility model;

Fig. 6 is the working curve of Fig. 5 when working;

Fig. 7 is the circuit structure diagram of an embodiment bidirectional current of the utility model translation circuit;

Fig. 8 is the current direction figure of the utility model embodiment when working;

Fig. 9 is the current direction figure of the utility model embodiment when working;

Figure 10 is the current direction figure of the utility model embodiment when working;

Figure 11 is the current direction figure of the utility model embodiment when working.

On behalf of input voltage, 2,1 represent input current among Fig. 2, Fig. 4, Fig. 6.

As shown in Figure 5, a kind of uninterrupted power supply with little bidirectional current converter comprises control section and main circuit, and main circuit is to be made of ac input end 1, ac output end 2, main bidirectional current converter 3 and storage battery 5; Wherein the interchange end 3A of ac input end and ac output end and main bidirectional current converter is connected, and storage battery connects the dc terminal 3B of main bidirectional current converter; This uninterrupted power supply with little bidirectional current converter also is provided with little transformer 4 and little bidirectional current converter 6; Described ac input end 1 connects the low pressure winding 4A of this little transformer; The interchange end 6A of described little bidirectional current converter connects the high pressure winding 4B of described little transformer, and the dc terminal 3B of the dc terminal 6B of this little bidirectional current converter and main bidirectional current converter is connected storage battery jointly; Described little transformer 4 and little bidirectional current converter 6 power match.The power of little bidirectional current converter 6 be above-mentioned main bidirectional current converter 3 10～25% between.

The circuit structure of little bidirectional current interchanger 6 and main bidirectional current converter 3 as shown in Figure 7.

During use, when storage battery does not need to charge, work as voltage and current all just often as shown in Figure 8, civil power is directly supplied with output; As shown in Figure 9 when voltage reduces, the many absorption current of system are transformed into voltage with electric current through little reversible transducer and little transformer and export to load, realize stable; As shown in figure 10 when voltage raises, the voltage that system raises becomes electric current through little reversible transducer and little transformer and exports to load, realizes stable.When storage battery need charge, its working condition as shown in figure 11.

Wherein the process icon among Fig. 8, Fig. 9, Figure 10, Figure 11 is represented the variation of voltage, electric current, energy from top to bottom respectively.

Claims

1. the uninterrupted power supply with little bidirectional current converter comprises control section and main circuit, and main circuit is to be made of ac input end (1), ac output end (2), main bidirectional current converter (3) and storage battery (5); Wherein the interchange end (3A) of ac input end and ac output end and main bidirectional current converter is connected, and storage battery connects the dc terminal (3B) of main bidirectional current converter; It is characterized in that: described uninterrupted power supply with little bidirectional current converter also is provided with little transformer (4) and little bidirectional current converter (6); Described ac input end (1) connects the low pressure winding (4A) of this little transformer; The interchange end (6A) of described little bidirectional current converter connects the high pressure winding (4B) of described little transformer, and the dc terminal (3B) of dc terminal of this little bidirectional current converter (6B) and main bidirectional current converter is connected storage battery jointly; Described little transformer (4) and little bidirectional current converter (6) power match.

2. the uninterrupted power supply with little bidirectional current converter according to claim 1 is characterized in that: the power of above-mentioned little bidirectional current converter (6) be above-mentioned main bidirectional current converter (3) 10～25% between.