CN101499668B

CN101499668B - Uninterruptible power supply module

Info

Publication number: CN101499668B
Application number: CN2008100952146A
Authority: CN
Inventors: 陆岩松; 吕飞; 谭惊涛; 应建平
Original assignee: Delta Electronics Inc
Current assignee: Delta Electronics Inc
Priority date: 2008-01-28
Filing date: 2008-04-18
Publication date: 2012-02-01
Anticipated expiration: 2028-04-18
Also published as: CN101499668A

Abstract

A power supply module of an uninterruptible power supply comprises a direct-current voltage source, a control module, a control arm bridge module, an inductance element, a switching element and a switching element. The switching element is conducted before the inductive element is connected to the direct-current voltage source through the switching element, so that the direct-current voltage provided by the direct-current voltage source is regulated through the control arm bridge module and is provided to the load as the output alternating-current voltage, and the switching element is disconnected after the inductive element is connected to the direct-current voltage source, namely, the switching element is not conducted, so that the service life of the switching element is prolonged, and the reliability of the uninterrupted power supply module is improved.

Description

Electric power supply module without interruption

Technical field

The invention relates to a kind of electric power supply module without interruption; Particularly about a kind of electric power supply module without interruption with an auxiliary switch element.

Background technology

Progress along with power supply technique; Electric power supply module without interruption (uninterruptible power supply) has become some indispensable in the electric power system; Its main characteristic is; In a main power supply (being generally an alternating-current voltage source) power supply just often; Electric power supply module without interruption is to receive by the alternating voltage that main power supply provided, and regulates back output one alternating voltage with as providing to the voltage of a load through a control arm bridge module, but outage or power supply takes place when unusual above predetermined voltage at main power supply; Electric power supply module without interruption just switches element through itself; Circuit switched is regulated back output one alternating voltage as the voltage that provides to load, through this kind power supply switching way direct voltage source provides a direct current voltage through the control arm bridge module to the direct voltage source (like battery) of itself; The continuation that keeps the power supply source of load, but existing electric power supply module without interruption has the problem of the excessive and preponderance of volume usually.

In order to address the above problem; The United States Patent (USP) notification number discloses a kind of electric power supply module without interruption No. 6104104; This electric power supply module without interruption has adopted new control method, has promptly replaced tradition to be used for the electrochemical capacitor energy storage link of electric power supply module without interruption with little electric capacity.This variation has significantly reduced the volume and weight of electric capacity, has improved the reliability of electric power supply module without interruption.

But the switching device of above-mentioned electric power supply module without interruption is all a Millisecond (milli second) mechanical type switching device, and it has needs long switching time, completion is switched to the battery action by main power supply before; The little electric capacity that the United States Patent (USP) notification number is mentioned for No. 6104104; Can not be in handoff procedure for load provide enough energy, therefore, in handoff procedure; Output voltage will unavoidably exist the situation of temporary transient interruption; Reliability service to load has brought great harm, and with utilizing the mechanical type switching device to realize that bigger electric current may make handoff failure in the handoff procedure; Even form electric arc at the contact point place, burn out the switching device of electric power supply module without interruption.

In sum, how to make the handoff procedure of electric power supply module without interruption can safe and reliable carrying out, and then make the sustainable electric current that stay in grade is provided of electric power supply module without interruption to load, for this reason the industry in field need the target of effort badly.

Summary of the invention

A purpose of the present invention is to provide a kind of electric power supply module without interruption; Be coupled to an alternating-current voltage source; To receive one by input ac voltage that this alternating-current voltage source was provided; And provide output AC voltage to a load, this electric power supply module without interruption to comprise a direct current voltage source, a control module, a control arm bridge module, an inductance element, a switching element and a switch element.This direct voltage source is in order to provide a direct current voltage.This control module is coupled to this alternating-current voltage source, in order to detecting a magnitude of voltage of this input ac voltage, and produces a control signal corresponding to this magnitude of voltage.This inductance element is coupled to this alternating-current voltage source and this direct voltage source, in order to receive this direct voltage and this input ac voltage one of them.This control arm bridge module is coupled to this inductance element and this load, in order to one of them is adjusted to this output AC voltage and is passed to this load with this direct voltage and this input ac voltage.This switching device is coupled to this inductance element, and this switching device comprises an ac input end and a direct current input, and this ac input end is coupled to this alternating-current voltage source; This direct-flow input end is coupled to this direct voltage source; This switching device is in order to corresponding to this control signal, make this inductance element be connected to this ac input end and this direct-flow input end one of them, with through this inductance element; With this input ac voltage and this direct voltage one of them; After this control arm bridge module adjusting,, provide to this load as this output AC voltage.This switch element is coupled to this direct voltage source and this control arm bridge module, before making this inductance element be connected to this direct-flow input end at this switching device, corresponding to this control signal conducting; After this direct voltage is regulated through this control arm bridge module; As this output AC voltage, provide to this load, and after this switching device makes this inductance element be connected to this direct-flow input end, turn-off; That is, make this not conducting of switching device.

In addition; Switch element is also in order to before making this inductance element be connected to this ac input end at this switching device; Corresponding to this control signal conducting, after this direct voltage is regulated through this control arm bridge module, as this output AC voltage; Provide to this load, and after this switching device makes this inductance element be connected to this ac input end, turn-off.

The present invention is by a switch element; Switching device at electric power supply module without interruption switches in the process of ac input end and direct-flow input end; Current break when preventing switching device because of alternating voltage and direct voltage switching; And handle through the control arm bridge module and to produce output AC voltage and to load high quality power supply is provided continuously, and can optimize the on off state of switching device.

The handoff procedure of ac input end and direct-flow input end is the opening process of a zero current, has optimized the current stress of switching device, to prolong the useful life of this switching device, to improve the reliability of electric power supply module without interruption.In addition, the control arm bridge module comprises an electric capacity, and it is stable that electric power supply module without interruption of the present invention can also be kept the voltage of electric capacity, and then solves the shortcoming of existing electric power supply module without interruption.

For letting above-mentioned purpose of the present invention, technical characterictic and the advantage can be more obviously understandable, hereinafter be to cooperate appended graphic being elaborated with preferred embodiment.

Description of drawings

Fig. 1 is the sketch map of a preferred embodiment of the present invention;

When Fig. 2 is low-voltage for the voltage of the direct voltage source of this preferred embodiment, switch to the oscillogram of DC mode from AC mode;

When Fig. 3 is high voltage for the voltage of the direct voltage source of this preferred embodiment, switch to the oscillogram of DC mode from AC mode;

When Fig. 4 is low-voltage for the voltage of the direct voltage source of this preferred embodiment, switch to the oscillogram of AC mode from DC mode;

When Fig. 5 is high voltage for the voltage of the direct voltage source of this preferred embodiment, switch to the oscillogram of AC mode from DC mode; And

Fig. 6 is the sketch map of another enforcement aspect of this preferred embodiment.

The main element symbol description:

1: electric power supply module without interruption 11: direct voltage source

11a: direct voltage 12: control arm bridge module

12a: the first switch element 12b of first brachium pontis: the second switch unit of first brachium pontis

12c: the first unit 12d forward of first brachium pontis: second unit forward of first brachium pontis

12e: the first switch element 12f of second brachium pontis: the second switch unit of second brachium pontis

12g: the first unit 12h forward of second brachium pontis: second unit forward of second brachium pontis

12i: the first switch element 12j of the 3rd brachium pontis: the second switch unit of the 3rd brachium pontis

12k: the first unit 12m forward of the 3rd brachium pontis: second unit forward of the 3rd brachium pontis

12n: electric capacity 13: inductance

14: control module 14a: control signal

14b: control signal 15: switching device

15a: direct-flow input end 15b: ac input end

16: switch element 17: the output filtration module

1a: current limiting element 2: alternating-current voltage source

20: input ac voltage 3: output AC voltage

21: waveform 22: waveform

23: waveform 24: waveform

25: waveform 31: waveform

32: waveform 33: waveform

34: waveform 35: waveform

41: waveform 42: waveform

43: waveform 44: waveform

45: waveform 51: waveform

52: waveform 53: waveform

54: waveform 55: waveform

6: load 7: electric power supply module without interruption

Embodiment

Below will explain content of the present invention through embodiment; Preferred embodiment of the present invention is as shown in Figure 1; It is uninterrupted power supply power supply (uninterruptible power supply) module 1; It is coupled to an alternating-current voltage source 2; Fit and can receive the input ac voltage 20 that provided by alternating-current voltage source 2, and provide an output AC voltage 3 to one loads 6, electric power supply module without interruption 1 comprises a direct current voltage source 11, a control arm bridge module 12, an inductance element 13, a control module 14, and switches element 15 (comprising a direct current input 15a and an ac input end 15b), a switch element 16, an output filtration module 17.Output filtration module 17 can be used existing techniques in realizing, is not innovative technology of the present invention, does not add at this and gives unnecessary details.

In order to be more prone to describe the present invention; The power supply powering mode that in this preferred embodiment the switching device 15 of electric power supply module without interruption 1 is switched on ac input end 15b is called " AC mode ", and the power supply powering mode that the switching device 15 of electric power supply module without interruption 1 is switched on direct-flow input end 15a is called " DC mode ".Alternating voltage 20 is provided by 2 of alternating-current voltage sources, and ac input end 15b is coupled to alternating-current voltage source 2, in order to receive input ac voltage 20; Direct voltage 11a is provided by 11 of direct current voltage sources, and ac input end 15a is coupled to direct voltage source 11, in order to receive direct voltage 11a; Direct voltage source 11 is an energy-storage travelling wave tube (a for example battery) in the present embodiment, and control arm bridge module 12 is coupled to inductance element 13 and load 6, in order to one of them converts output AC voltage 3 into and is passed to load 6 with direct voltage 11a and input ac voltage 20; Inductance element 13 is coupled to alternating-current voltage source 2 and direct voltage source 11, in order to receive direct voltage 11a and input ac voltage 20 one of them, control module 14 is coupled to alternating-current voltage source 2; In order to a magnitude of voltage of detecting input ac voltage 20, and produce a control signal 14a, at this moment corresponding to this magnitude of voltage; It is to be in an outage or to supply power to surpass the abnormality of predetermined voltage that control signal 14a represents input ac voltage 20; In the present embodiment, control module 14 mainly is as control switching element 15 and switch element 16, with the usefulness of the magnitude of voltage of detecting input ac voltage 20; It can be a micro-control unit (micro control unit); The circuit that also can other and micro-control unit has identical function substitutes, not as limit but in other embodiments.

Switching device 15 is coupled to inductance element 13, in order to corresponding to control signal 14a, makes inductance element 13 be connected to direct-flow input end 15a; To pass through inductance element 13; After direct voltage 11a regulated through control arm bridge module 12, produce output AC voltage 3, provide to load 6.In other words; When the abnormal electrical power supply of AC mode, promptly can switch to DC mode, when switching device 15 switches; Electric power supply module without interruption 1 is to give control arm bridge module 12 through switch element 16 with the electric energy transmitting of direct voltage source 11, to continue to provide regulated power to load 6.

Switch element 16 is coupled to direct voltage source 11 and control arm bridge module 12; Before making inductance element 13 be connected to direct-flow input end 15a at switching device 15; Corresponding to control signal 14a conducting, after direct voltage 11a is regulated through control arm bridge module 12, as output AC voltage 3; Provide to load 6, and after switching device 15 makes inductance element 13 be connected to direct-flow input end 15a, turn-off.In this preferred embodiment; Switching device 15 is a mechanical type switching device; Switch element 16 is an electronic switching element, like thyristor (silicon-controlled rectifier), metal oxide semiconductcor field effect transistor (metaloxide semiconductor field effect transistor) and insulated gate bipolar property transistor (insulatedgate bipolar transistor) or the like; Electric power supply module without interruption 1 also comprises a current limiting element 1a; Direct voltage source 11 is to be coupled to switch element 16 through current limiting element 1a; Current limiting element 1a can prevent the current break when switching device 15 switches with direct voltage 11a because of input ac voltage 20 in order to the flow through magnitude of current of direct voltage 11a of switch element 16 of restriction.

In addition, control module 14 is also in order to a magnitude of voltage of detecting input ac voltage 20, and produces a control signal 14b corresponding to magnitude of voltage.At this moment, it is to be in normal condition that control signal 14b represents input ac voltage 20, and switching device 15 then switches to direct-flow input end 15a at present, receives the input power supply of direct voltage 11a as control arm bridge module 12.Magnitude of voltage corresponding to input ac voltage 20 is normal; Switching device 15 is also in order to corresponding to control signal 14b; Make inductance element 13 be connected to ac input end 15b, to pass through inductance element 13, with the input power supply of input ac voltage 20 as control arm bridge module 12; And be adjusted to output AC voltage 3, to provide to load 6.Switch element 16 is also in order to before making inductance element 13 be connected to ac input end 15b at switching device 15; Corresponding to control signal 14b conducting; To convert direct voltage 11a to output AC voltage 3; Provide to load 6, and after switching device 15 makes inductance element 13 be connected to ac input end 15b, turn-off.

Specifically; Control arm bridge module 12 comprises a plurality of arm bridge and electric capacity 12n that are connected in parallel that are; Output AC voltage 3 is to provide to load 6 through this equiarm bridge; In the present embodiment, control arm bridge module 12 comprises three arm bridges, but the arm bridge number of control arm bridge 12 is not in order to limit scope of the present invention.This three arms bridge is respectively the first arm bridge, the second arm bridge and the 3rd arm bridge, and the first arm bridge comprises forward element 12c and one second element 12d forward of one first switch element 12a, a second switch unit 12b, one first; The second arm bridge comprises forward element 12g and one second element 12h forward of one first switch element 12e, a second switch unit 12f, one first; The 3rd arm bridge comprises forward element 12k and one second element 12m forward of one first switch element 12i, a second switch unit 12j, one first; Above-mentioned arm bridge all can prior art be reached; The circuit structure that for example couples diode with transistor is reached; Is example at this with the first arm bridge, describes the part relevant with present embodiment.

As shown in Figure 1, the first switch element 12a, a second switch unit 12b become series connection, and electric capacity 12n is parallelly connected with the first arm bridge; One end of switch element 16 and the first arm bridge is and is connected in series, and at the beginning, the magnitude of voltage of input ac voltage 20 is for just often; Switching device 15 is to switch on ac input end 15b; With reception input ac voltage 20, and through inductance element 13 and control arm bridge module 12, input ac voltage 20 is adjusted to output AC voltage 3 to be provided to load 6; This moment, switch element 16 was to be in off state; The first switch element 12a and second switch unit 12b are that (Pulse WidthModulation PWM) is modulated to mode of operation, makes input ac voltage 20 can pass through the first arm bridge by pulse width modulation.

When the magnitude of voltage that detects input ac voltage 20 when control module 14 is unusual, promptly produce control signal 14a, in order to switching device 15 is switched to direct-flow input end 15a by A.C. current input 15b; Because switching device 15 is the mechanical type switching device; Need just can accomplish change action certain switching time, therefore in the handoff procedure of switching device 15, control signal 14a is turn-on switch component 16 simultaneously; Direct voltage 11a so that direct voltage source 11 is provided is transferred to control arm bridge module 12; Produce output AC voltage 3 continued powers to load 6, when switch element 16 conductings, the first switch element 12a and second switch unit 12b also turn-off thereupon; Make direct voltage source 11 become to be connected in parallel with electric capacity 12n through switch element 16; The second arm bridge and the 3rd arm bridge with through electric capacity 12n and this control arm bridge module 12 provide output AC voltage 3 to load 6, make the voltage that can keep electric capacity 12n in switching device 15 handoff procedures stable.In addition; Inductance element 13 is to be coupled between the first switch element 12a and the second switch unit 12b; With with input ac voltage 20 and direct voltage 11a one of them (switching condition of looking closely present switching device 15), converting output AC voltage 3 into through control arm bridge module 12 provides to load 6, and first forward element 12c is parallelly connected with the first switch element 12a; Second forward element 12d is parallelly connected with second switch unit 12b, with the current direction of control flows through the first arm bridge.

When switching device 15 successful switch to direct voltage sources 11; Switching device 15 can receive direct voltage 11a and be transferred to the output AC voltage 3 that control arm bridge module 12 converts into to be provided to load 6; Switch element 16 does not need to receive direct voltage 11a again, so switch element 16 will become off state.In addition; Control module 14 also continues the magnitude of voltage of detecting input ac voltage 20; It recovers just often; Switching device 15 must switch the stream input 15b that backcross from direct-flow input end 15a, and it is identical that the action of its handoff procedure and switch element 16 and above-mentioned switching device 15 switch to direct-flow input end 15a from ac input end 15b, does not add at this and gives unnecessary details.

Be the clearer action of electric power supply module without interruption 1 under various states of understanding this preferred embodiment; See also Fig. 2; When it is low-voltage for the voltage of direct voltage source 11 (magnitude of voltage of direct voltage 11a is lower than the peak value of output AC voltage 3); Switch to the oscillogram of DC mode from AC mode; The transverse axis express time, it comprises waveform 21 to 25, represent in regular turn respectively control signal, the input of control signal, the switch element 16 of switching device 15 alternating current voltage, electric capacity 12n voltage and export the voltage of the output AC voltage 3 of load 6 to.

Explanation is earlier; When waveform 21 (being the control signal of switching device 15) is logic low; Expression switching device 15 is to switch on ac input end 15b or forward ac input end 15b switching; During for logic high, expression switching device 15 is to switch on direct-flow input end 15a or forward dc input 15a switching; When waveform 22 (being the control signal of switch element 16) is logic low, the 16 not conductings of expression switch element, during for logic high, 16 conductings of expression switch element.

Therefore, in time interval t1, switching device 15 is to switch on ac input end 15b, and since the magnitude of voltage of the alternating voltage 20 that ac input end 15b imported for normal, so Shang Buxu switches to direct-flow input end 15a, waveform 22 is a logic low; In time interval t2; The magnitude of voltage that control module 14 detects alternating voltage 20 occurs unusually, and this moment, switching device 15 must switch to direct-flow input end 15a by ac input end 15b, makes direct voltage source 11 temporary transient power supply energy to loads 6; Therefore waveform 21 is transformed to and is logic high; Waveform 22 is transformed to and is logic high, and waveform 23 levels off to zero, represents the magnitude of voltage of input ac voltage 20 unusual.In addition, the voltage of direct voltage source 11 is low-voltage, and this can be learnt by the variation of waveform 24 and 25.Behind time interval t2, i.e. the interval t3 of entry time, this moment, switching device 15 switched to direct-flow input end 15a smoothly; At this moment; Waveform 21 is a logic high, and waveform 22 reverts to logic low, and waveform 23 is still for leveling off to zero; Represent the magnitude of voltage of input ac voltage 20 unusual,

waveform

24 and 25 also corresponding to the voltage of direct voltage source 11 be low-voltage with variation.

In other words; In time interval t3, electric power supply module without interruption 1 success switches to DC mode by AC mode, switch element 16 shutoffs this moment; Switching device 15 links to each other with direct voltage source 11 by direct-flow input end 15a, and separates fully with ac input end 15b.

See also Fig. 3; When it is high voltage for the voltage of direct voltage source 11 (magnitude of voltage of direct voltage 11a is higher than the peak value of output AC voltage 3); Switch to the oscillogram of DC mode from AC mode; The transverse axis express time, it comprises waveform 31 to 35, represent respectively control signal, the input ac voltage 20 of control signal, the switch element 16 of switching device 15 voltage, electric capacity 12n voltage and export the voltage of the output AC voltage 3 of load 6 to.Each wave form varies and Fig. 2 of Fig. 3 are similar, and its difference only is that the voltage of direct voltage source 11 is high voltage, so

waveform

34 and 35 also changes thereupon.

See also Fig. 4; When it is low-voltage for the voltage of direct voltage source 11, switch to the oscillogram of AC mode from DC mode, it comprises waveform 41 to 45; Represent respectively control signal, the input ac voltage 20 of control signal, the switch element 16 of switching device 15 voltage, electric capacity 12n voltage and export the voltage of the output AC voltage 3 of load 6 to; The transverse axis express time, in addition, knowing this art can be after the wave form varies of understanding Fig. 2; Understand the wave form varies of Fig. 4, do not add at this and give unnecessary details.

See also Fig. 5; When it is high voltage for the voltage of direct voltage source 11; Switch to the oscillogram of AC mode from DC mode; The transverse axis express time, it comprises waveform 51 to 55, represent respectively control signal, the switch element 16 of switching device 15 control signal, input ac voltage 20, electric capacity 12n voltage and export the output AC voltage 3 of load 6 to.In addition, know this art and can after the wave form varies of understanding Fig. 3, understand the wave form varies of Fig. 5, do not add at this and give unnecessary details.

Please continue to consult Fig. 6; It is the sketch map of another enforcement aspect of this preferred embodiment; Electric power supply module without interruption 7 is with the difference of the electric power supply module without interruption 1 of Fig. 1; The positive pole of the direct voltage source 11 of electric power supply module without interruption 1 is connected to the end of electric capacity 12n, and the negative pole of direct voltage source 11 is connected to the other end of electric capacity 12n through switch element 16; And the negative pole of the direct voltage source 11 of electric power supply module without interruption 7 is connected to the end of electric capacity 12n; The positive pole of direct voltage source 11 is connected to the other end of electric capacity 12n through switch element 16; In other words, electric power supply module without interruption 7 is that with the difference of electric power supply module without interruption 1 direct voltage source 11, switch element 16 and electric capacity 12n link position are different; But still can bring into play identical functions; Know this art after, can know that understanding the link position difference does not influence the object of the invention and realize, does not add at this and gives unnecessary details with reference to above stated specification.

Can know by above-mentioned explanation; Electric power supply module without interruption of the present invention is by a switch element; Switching device at electric power supply module without interruption switches in the process of ac input end and direct-flow input end; Prevent the current break when switching device switches because of alternating voltage and direct voltage, and handle through the control arm bridge module and to produce output AC voltage and to load high quality power supply is provided continuously, and can optimize the on off state of switching device.

The above embodiments enforcement aspect of the present invention that only is used for giving an example, and explain technical characterictic of the present invention, be not to be used for limiting category of the present invention.Any be familiar with this operator can unlabored change or the arrangement of the isotropism scope that all belongs to the present invention and advocated, interest field of the present invention should be as the criterion with the claim scope.

Claims

1. An uninterruptible power supply module, coupled to an AC voltage source, to receive an input AC voltage provided by the AC voltage source, and provide an output AC voltage to a load, characterized in that the The uninterruptible power supply module contains:

a DC voltage source for providing a DC voltage;

A control module, coupled to the AC voltage source, for detecting the input AC voltage value, and generating a control signal corresponding to the voltage value;

an inductance element coupled to the AC voltage source and the DC voltage source for receiving one of the DC voltage and the input AC voltage;

a control arm bridge module, coupled to the inductance element and the load, and used to adjust one of the DC voltage and the input AC voltage into the output AC voltage and transmit it to the load, the The control arm bridge module has a plurality of arm bridges connected in parallel and a capacitor connected in parallel with the plurality of arm bridges;

A switch element, coupled to the inductance element, the switch element includes an AC input end and a DC input end, the AC input end is coupled to the AC voltage source, and the DC input end is coupled to the The DC voltage source, the switching element is used to connect the inductance element to one of the AC input end and the DC input end corresponding to the control signal, and

a switching element coupled to the DC voltage source and the control arm bridge module and connected in series with one of the plurality of arm bridges for connecting the inductance element to the DC voltage at the switching element Before the input terminal, corresponding to the conduction of the control signal, the DC voltage source is connected in parallel with the capacitor through the switch element, and the voltage of the capacitor in the control arm bridge module is connected to the voltage of the capacitor. The voltage difference between the two DC voltages is zero to achieve zero-current switching of the switching element, so that the DC voltage is regulated by the control arm bridge module and provided to the load as the output AC voltage, and Turning off after the switching element connects the inductive element to the DC input.

2. The uninterruptible power supply module according to claim 1, wherein the input AC voltage is regulated by the plurality of arm bridges, and provided to the load as the output AC voltage.

3. The uninterruptible power supply module according to claim 2, wherein the plurality of arm bridges comprise a first arm bridge, and the inductance element is coupled to the load through the first arm bridge .

4. The uninterruptible power supply module according to claim 3, wherein the capacitor is connected in parallel with the first arm bridge, and the first arm bridge includes a first switch unit and a first switch unit connected in series. Two switching units, the switching element is connected in series with one end of the first arm bridge, when the switching element is turned on, the first switching unit and the second switching unit are turned off, so that the direct current A voltage source is connected in parallel with the capacitor through the switching element to provide the DC voltage to the capacitor.

5. The uninterruptible power supply module according to claim 4, wherein the first arm bridge further comprises a first direct component and a second direct component, the first direct component and the The first switch unit is connected in parallel, and the second forward element is connected in parallel with the second switch unit, so as to control the flow direction of the current flowing through the first arm bridge.

6. The uninterruptible power supply module according to claim 4, wherein the inductance element is coupled between the first switch unit and the second switch unit to convert the input AC voltage One of the DC voltages is provided to the load through the first arm bridge as the output AC voltage.

7. The uninterruptible power supply module according to claim 1, further comprising a current limiting element, the DC voltage source is coupled to the switching element through the current limiting element, the current limiting An element is used to limit the amount of current of the DC voltage flowing through the switching element.

8. The uninterruptible power supply module of claim 1, wherein the switch element is an electronic switch element.

9. The uninterruptible power supply module of claim 1, wherein the switching element is a mechanical switching element.

10. An uninterruptible power supply module, coupled to an AC voltage source, to receive an input AC voltage provided by the AC voltage source, and provide an output AC voltage to a load, characterized in that the The uninterruptible power supply module contains:

a DC voltage source for providing a DC voltage;

a control module, coupled to the AC voltage source, for detecting the voltage value of the input AC voltage, and generating a control signal corresponding to the voltage value;

a control arm bridge module, coupled to the inductance element and the load, used to adjust one of the DC voltage and the input AC voltage to transmit the output AC voltage to the load, the control The arm bridge module has a plurality of arm bridges connected in parallel and a capacitor connected in parallel with the plurality of arm bridges;

a switching element coupled to the DC voltage source and the control arm bridge module and connected in series with one of the plurality of arm bridges for connecting the inductive element to the AC Before the input terminal, corresponding to the conduction of the control signal, the DC voltage source is connected in parallel with the capacitor through the switch element, and the voltage of the capacitor in the control arm bridge module is connected to the voltage of the capacitor. The voltage difference between the two DC voltages is zero to achieve zero-current switching of the switching element, so that the DC voltage is regulated by the control arm bridge module and provided to the load as the output AC voltage, and is turned off after the switching element connects the inductive element to the AC input.

11. The uninterruptible power supply module according to claim 10, wherein the input AC voltage is regulated by the plurality of arm bridges and provided to the load as the output AC voltage.

12. The uninterruptible power supply module according to claim 11, wherein the plurality of arm bridges comprise a first arm bridge, and the inductance element is coupled to the load through the first arm bridge .

13. The uninterruptible power supply module according to claim 12, wherein the capacitor is connected in parallel with the first arm bridge, and the first arm bridge includes a first switch unit and a first switch unit connected in series. Two switching units, the switching element is connected in series with one end of the first arm bridge, when the switching element is turned on, the first switching unit and the second switching unit are turned off, so that the DC A voltage source is connected in parallel with the capacitor through the switching element to provide the DC voltage to the capacitor.

14. The uninterruptible power supply module according to claim 13, wherein the first arm bridge further comprises a first direct component and a second direct component, the first direct component and the The first switch unit is connected in parallel, and the second forward element is connected in parallel with the second switch unit, so as to control the flow direction of the current flowing through the first arm bridge.

15. The uninterruptible power supply module according to claim 13, wherein the inductance element is coupled between the first switch unit and the second switch unit to convert the input AC voltage One of the DC voltages is provided to the load through the first arm bridge as the output AC voltage.

16. The uninterruptible power supply module according to claim 10, further comprising a current limiting element, the DC voltage source is coupled to the switching element through the current limiting element, the current limiting An element is used to limit the amount of current of the DC voltage flowing through the switching element.

17. The uninterruptible power supply module of claim 10, wherein the switching element is an electronic switching element.

18. The uninterruptible power supply module of claim 10, wherein the switching element is a mechanical switching element.