CN102593945A - Uninterruptible power supply circuit - Google Patents

Uninterruptible power supply circuit Download PDF

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CN102593945A
CN102593945A CN 201210038259 CN201210038259A CN102593945A CN 102593945 A CN102593945 A CN 102593945A CN 201210038259 CN201210038259 CN 201210038259 CN 201210038259 A CN201210038259 A CN 201210038259A CN 102593945 A CN102593945 A CN 102593945A
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rectifier
circuit
switch
end
negative
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CN 201210038259
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Chinese (zh)
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刘培国
姚晓锋
王博
费珍福
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华为技术有限公司
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Abstract

The invention discloses an uninterruptible power supply circuit which belongs to the field of a power supply. The uninterruptible power supply circuit comprises a selective switch that alternatively accesses a phase in an alternating current input and a battery input to an input end of a rectifying circuit, a rectifying circuit for converting alternating current to direct current, a positive converting circuit for providing the rectified and boosted positive voltage to an energy storage circuit, a negative converting circuit for providing the rectified and boosted negative voltage to the energy storage circuit, and an energy storage branch that comprises a first capacitor and a second capacitor connected in series, wherein one end of the first capacitor is connected with one end of the second capacitor at a same node. According to the uninterruptible power supply circuit, the battery is partially connected to circuit topology by placing the battery partially in front of the rectifying circuit through the selective switch such as a relay, so that the topology of the uninterruptible power supply circuit, provided by the embodiment of the invention, saves a thyristor and fittings and effectively reduces the power consumption.

Description

—种不间断电源电路 - Uninterruptible power supply circuit Species

技术领域 FIELD

[0001] 本发明涉及电源领域,特别涉及一种不间断电源电路。 [0001] The present invention relates to the field of power supplies, particularly, to an uninterruptible power supply circuit.

背景技术 Background technique

[0002] UPS (Uninterruptible Power Supply,不间断电源)系统已经广泛应用于各种供电场合。 [0002] UPS (Uninterruptible Power Supply, uninterruptible power supply) systems have been widely used in various power applications. UPS主要用于为负载提供不间断的电力供应,当市电输入正常时,UPS可以将市电整流并通过逆变器或者直接稳压后变成高质量电源提供给负载使用,此时的UPS可以看做是一台交流稳压器,同时还向机内电池充电,当市电发生中断等情况时,UPS立即将电池内的电能通过逆变转换的方法向负载继续供电,使负载维持正常工作,并保护负载软、硬件不受损坏。 UPS load is mainly used to provide uninterrupted power supply, when the commercial power input is normal, UPS and may be rectified mains via an inverter or directly after the use of the regulator to the load becomes high power, when the UPS can be seen as an AC voltage regulator, and also charging the internal battery, when the electricity interruption occurs, UPS power immediately in the cell by the method of converting the inverter continues supplying power to a load, the load to maintain normal work and protect the load the software and hardware from damage. UPS按照供电方式可以分为在线式UPS、后备式UPS和在线互动式UPS三种,其中, 应用最为广泛的是在线式UPS。 UPS power supply can be divided according to on-line UPS, Back-UPS and line interactive UPS are three which are most widely used on-line UPS.

[0003] 请参考图1,其示出了现有技术中的一种在线式UPS的电路示意图。 [0003] Please refer to FIG. 1, which shows a schematic circuit diagram of a prior art on-line UPS. 该在线式UPS 包括:包括晶闸管Ql和晶闸管Q2的整流电路,用于实现将交流电AC整流转换成直流电;包括串联的第一电容Cl和第二电容C2的储能支路,用于储存直流电提供的能量以便再次转换为高质量的交流电;包括第一电感LI、第一二极管Dl和第一开关管Q7的正向变换电路, 用于将整流后的直流电升压转换为正向电压加在第一电容Cl的两端;包括第二电感L2、第二二极管D2和第二开关管Q8的负向变换电路,用于将整流后的直流电升压转换为负向电压加在第二电容C2的两端;位于整流电路之后的晶闸管Q3用于将电池BAT接入该电路拓扑中。 The online UPS comprising: a thyristor comprises a thyristor Ql and Q2 of the rectifier circuit for rectifying AC achieve convert alternating current into direct current; comprises a first storage capacitor Cl and second capacitor C2 in series branch, to provide direct current for storage energy to convert AC high again; LI comprises a first inductor, a first diode Dl forward conversion circuit and a first switching transistor Q7, for converting the rectified DC power is boosted voltage plus the forward across the first capacitor Cl; a second inductor L2, the second diode D2 and a second switch transistor Q8 negative conversion circuit for converting the rectified DC power is boosted negative voltage is applied to the first two ends of the capacitor C2; located thyristor rectifier circuit for Q3 after the access to the battery BAT in the circuit topology.

[0004] 在具体应用时,通过添加脉宽调制类的控制信号给第一开关管Q7和第二开关管Q8,使得第一开关管Q7和第二开关管Q8在不同的导通和截止状态之间变化,可以实现功率因数校正和输出高质量的交流电。 [0004] In a specific application by adding a pulse width modulated control signal to the first class and the second switching transistor Q7 Q8 switch tube, such that the first switch and the second switch transistor Q7 Q8 in different ON and OFF state vary, and can achieve power factor correction AC output quality. 当市电发生中断等情况时,可以通过控制晶闸管Q3的导通将电池BAT接入电路,以便将电池BAT内的电能通过逆变转换成交流电的方法向负载继续供电。 When the electricity interruption occurs, the battery can be turned by the access circuit for controlling the thyristor Q3 BAT so that electric energy in the battery BAT to alternating current by an inverter converting method continues to supply power to the load.

[0005] 现有技术中,该在线式UPS包括三个晶闸管Ql、Q2和Q3,分别需要作用于各个晶闸管上的三套晶闸管驱动电路和三套散热器,由于在该电路拓扑中使用的晶闸管导通压降较大,使得损耗较大。 [0005] In the prior art, the three-line UPS includes a thyristor Ql, Q2 and Q3, respectively, need to act on the drive circuit and the thyristor three radiator three respective thyristors, since thyristors used in the circuit topology a large voltage drop, so that the loss is large.

发明内容 SUMMARY

[0006] 为了能够降低损耗,本发明实施例提供了一种不间断电源电路。 [0006] In order to reduce the loss, embodiments of the present invention provides an uninterruptible power supply circuit. 所述技术方案如下: The technical solutions are as follows:

[0007] 本发明实施例提供一种不间断电源电路,所述不间断电源电路包括:选择开关、整流电路、正向变换电路、负向变换电路、储能支路; Embodiment [0007] The present invention provides an uninterruptible power supply circuit, the uninterruptible power supply circuit comprising: a selection switch, a rectifier circuit, the forward conversion circuit, the conversion circuit negative, energy storage branch;

[0008] 所述选择开关,择一地将一相交流电输入中的一相或电池输入接入整流电路的输入端,其中,所述交流电输入为单相交流电或三相交流电; [0008] The selection switch alternatively be a one-phase AC input phase or access to the battery input rectifier circuit input terminal, wherein said AC input is a single-phase AC or three-phase alternating current;

[0009] 所述整流电路,包括串联的第一整流器和第二整流器,所述第一整流器的负极为所述整流电路的第一输出端,所述第二整流器的正极为所述整流电路的第二输出端,所述第一整流器的正极和所述第二整流器的负极相连于同一节点且所述节点为所述整流电路的输入端; [0009] The rectifying circuit includes a first and second rectifiers connected in series, a first output of the first rectifier circuit of the rectifier is extremely negative, positive pole of the rectifier circuit of the second rectifier a second output terminal, the positive electrode and the negative electrode of said first rectifier connected to the second rectifier and the node is the same node of the rectifier circuit input terminal;

[0010] 所述正向变换电路,包括第一电感,所述第一电感的一端接所述整流电路的第一输出端,所述第一电感的另一端分别与第一二极管的正极和第一开关管的一端相接,所述第一二极管的负极为所述正向变换电路的正输出端,所述第一开关管的另一端为所述正向变换电路的零输出端; [0010] The forward conversion circuit comprising a first inductor, one end of the first output terminal of the rectifier circuit of the first inductor, the cathode of the first diode respectively other end of the first inductor and the end of the first switch contact, the first diode anode is the positive output terminal of the forward conversion circuit, said forward conversion circuit and the other end of the first zero output switch tube end;

[0011] 所述负向变换电路,包括第二电感,所述第二电感的一端接所述整流电路的第二输出端,所述第二电感的另一端分别与第二二极管的负极和第二开关管的一端相接,所述第二二极管的正极为所述负向变换电路的负输出端,所述第二开关管的另一端为所述负向变换电路的零输出端; [0011] The negative electrode to the other end are negative converting circuit including a second inductor, one end of the second output terminal of the rectifier circuit a second inductor, the second inductor and the second diode and the end of the second switch contact, said second diode to the positive pole to the negative terminal of the negative output of the conversion circuit, the second switch the other end of the tube is zero output to the conversion circuit negative end;

[0012] 所述储能支路,包括串联的第一电容和第二电容,所述第一电容的一端和第二电容的一端相连于同一节点,且所述节点与所述零输出端和所述交流电的零线相连,所述第一电容的另一端与所述正输出端相连;所述第二电容的另一端与所述负输出端相连。 [0012] The energy storage branch, comprising a first capacitor and a second capacitor connected in series, one end of the end of the first capacitor and a second capacitor connected to the same node, and the node and the output terminal of the zero and zero line of the AC power is connected to the other end of the first capacitor is connected to the positive output terminal; and the other end connected to the second capacitor and the negative output terminal.

[0013] 本发明实施例提供的技术方案带来的有益效果是: [0013] Embodiments of the invention provide a technical solution is beneficial effects:

[0014] 通过将电池部分置于整流电路之前,并通过例如继电器之类的选择开关来将电池部分接入电路拓扑,使得本发明实施例提供的不间断电源电路拓扑至少节省了一个晶闸管及配套组件,有效降低了损耗。 [0014] The battery part is placed before the rectifier circuit by, for example, by selecting a relay switch or the like to access the portion of the battery circuit topology, such that the present invention is an uninterruptible power supply circuit topology according to an embodiment the at least one thyristor and related savings assembly, effectively reducing the loss.

附图说明 BRIEF DESCRIPTION

[0015] 为了更清楚地说明本发明实施例中的技术方案,下面将对实施例描述中所需要使用的附图作简单地介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。 [0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, as briefly described in the introduction to the accompanying drawings required for use in describing the embodiments. Apparently, the drawings in the following description are only some of the present invention. embodiments, those of ordinary skill in the art is concerned, without creative efforts, can derive from these drawings other drawings.

[0016] 图I是现有技术中的一种在线式UPS的电路示意图; [0016] Figure I is a circuit diagram of a prior art line UPS;

[0017] 图2是本发明实施例一提供的不间断电源电路的电路示意图; [0017] FIG. 2 is a circuit diagram of an uninterruptible power supply circuit according to a first embodiment of the present invention;

[0018] 图3是本发明实施例二提供的不间断电源电路的电路示意图; [0018] FIG. 3 is a circuit diagram of an uninterruptible power supply circuit according to a second embodiment of the present invention;

[0019] 图4是本发明实施例三提供的不间断电源电路的电路示意图。 [0019] FIG. 4 is a circuit diagram of an uninterruptible power supply circuit according to a third embodiment of the present invention.

具体实施方式 Detailed ways

[0020] 为使本发明的目的、技术方案和优点更加清楚,下面将结合附图对本发明实施方式作进一步地详细描述。 [0020] To make the objectives, technical solutions, and advantages of the present invention will become apparent in conjunction with the accompanying drawings of the following embodiments of the present invention will be described in further detail.

[0021] 本发明实施例提供的不间断电源电路的重点和亮点之一为:将在线式UPS中的电池部分置于整流电路之前,通过例如继电器之类的选择开关来将电池部分接入不间断电源电路中。 [0021] One of key uninterruptible power supply circuit according to an embodiment of the present invention and highlights to: prior to the battery part is placed in-line UPS rectifier circuit, for example, by selecting a relay switch or the like to access the portion of the battery is not uninterruptible power supply circuit.

[0022] 实施例一 [0022] Example a

[0023] 请参考图2,其示出了本发明实施例一提供的不间断电源电路的电路示意图。 [0023] Please refer to FIG 2, which shows a circuit diagram of the present invention is an uninterruptible power supply circuit according to a first embodiment. 该不间断电源电路可以用于单相交流电输入式不间断电源中。 The uninterruptible power supply circuit may be used for single-phase A.C. input in the uninterruptible power supply. 图中仅示出了该不间断电源的主要电路部分,对于本领域技术人员所熟知的其它部分未予示出。 Showing only a portion of the main circuit of an uninterruptible power supply, to other portions of the person skilled in the art is not shown. 该不间断电源可以包括选择开关、整流电路、正向变换电路、负向变换电路和储能支路。 The uninterruptible power supply may include a selection switch, a rectifier circuit, the forward conversion circuit, the conversion circuit and the negative energy storage branch.

[0024] 选择开关用于择一地将交流电输入中的一相和电池输入接入整流电路的输入端, 该交流电输入可以是单相交流电,也可以是三相交流电。 [0024] The selector switch is used alternatively with the input terminal of a battery and access to input rectifier circuit of the AC input, the input may be a single-phase AC power, or may be three-phase AC. 选择开关可以为一个继电器K1, 该继电器Kl可以是单刀双掷型继电器。 Selector switch may be a relay K1, the relay Kl may be SPDT relays. 该继电器Kl可以在市电正常时,将交流电AC接入整流电路的输入端;或者在市电发生中断等意外情况时,将电池BAT接入整流电路的输入端。 The relay Kl may be when the utility power is normal, access to an alternating current AC input rectifier circuit; interrupt or other unforeseen circumstances, the input terminal of the battery BAT access rectifying circuit occurs in the mains. 当然,在不同的实施例中,也可以采用多个单刀单掷型继电器的组合或者双刀双掷型继电器配合控制策略实现择一接入的功能。 Of course, in various embodiments, may also be employed a plurality of single pole single throw relay or a combination of DPDT relay with a control strategy selection function access. 易于思及地,选择继电器作为选择开关,可以便于实现自动控制和降低损耗。 Ease and Si, the selective relay switch alternatively, may facilitate automatic control and reduce losses. 但是选择开关的类型并不局限于继电器,也可以是其它可自动控制的开关。 But is not limited to the type selection switch relay, it may be another automatically controllable switch.

[0025] 整流电路用于实现将交流电转换为直流电。 [0025] The rectifying circuit for converting AC to DC power to implement. 整流电路可以包括串联的第一整流器Ql和第二整流器Q2。 A first rectifier circuit may include a rectifying Ql and Q2 in series with the second rectifier. 第一整流器Ql的负极为整流电路的第一输出端,第二整流器Q2的正极为整流电路的第二输出端,第一整流器Ql的正极和第二整流器Q2的负极相连于同一节点且该节点为整流电路的输入端,也即与前述选择开关相连的输入端。 A first output terminal Ql of the first rectifier circuit rectifying the negative electrode is the negative electrode output terminal of the second positive electrode is a second rectifier circuit of a rectifier Q2, the anode of the first rectifier and the second rectifier Ql Q2 is connected to the same node and the node input terminal of the rectifier circuit, i.e. the selection switch associated with the input.

[0026] 正向变换电路用于将整流后的直流电升压转换为正向电压加在储能支路的两个节点。 [0026] The forward conversion circuit for converting the rectified DC power is boosted forward voltage is applied to two branches of storage nodes. 正向变换电路包括第一电感LI、第一二极管Dl和第一开关管Q7,第一电感LI的一端接整流电路的第一输出端,也即第一整流器Ql的负极。 Forward conversion circuit comprising a first inductor LI, a first diode Dl and a first switching transistor Q7, the first inductor LI a first output end of the rectifier circuit, i.e., the cathode of the first rectifier Ql. 第一电感LI的另一端分别与第一二极管Dl的正极和第一开关管Q7的一端相接,第一二极管Dl的负极为正向变换电路的正输出端,第一开关管Q7的另一端为正向变换电路的零输出端。 The other end of the first inductor LI are in contact with the end of the cathode of the first diode Dl and a first switching transistor Q7, the positive output terminal of the first diode Dl of the negative electrode is the forward transform circuit, a first switch the other end of the forward transform circuit Q7 zero output.

[0027] 负向变换电路用于将整流后的直流电压升压转换为负向电压加在储能支路的两个节点。 [0027] Negative circuit for converting a DC voltage to boost converter is a negative rectified voltage is applied to the two branches of the storage nodes. 负向变换电路包括第二电感L2、第二二极管D2和第二开关管Q8,第二电感L2的一端接整流电路的第二输出端,也即第二整流器Q2的正极。 Negative converting circuit includes a second inductor L2, the second diode Q8, the second inductor L2, a second output end of the rectifier circuit D2 and a second switch, i.e. the positive electrode of the second rectifier Q2. 第二电感L2的另一端分别与第二二极管D2的负极和第二开关管Q8的一端相接,第二二极管D2的正极为负向变换电路的负输出端,第二开关管Q8的另一端为负向变换电路的零输出端。 The other end of the second inductor L2, respectively, and one end of the second diode D2 and a cathode in contact with a second switch transistor Q8, very positive negative negative output terminal of the conversion circuit the second diode D2, the second switch Q8 and the other end to the negative output terminal of the conversion circuit is zero.

[0028] 储能支路,包括串联的第一电容Cl和第二电容C2,第一电容Cl的一端和第二电容C2的一端相连于同一节点,且该节点与正向变换电路的零输出端、负向变换电路的零输出端和交流电AC的N线共同相连,N线也即俗称:交流电的火线和零线中的零线。 [0028] The energy storage branch, including in series a first capacitance Cl and a second capacitor C2, and the ends of the first capacitor Cl of the second capacitor C2 is connected to the same node, and the node with the zero output of the forward transform circuit end, commonly connected to the negative output terminal of the zero and AC conversion circuit of the AC line N, N lines are commonly known: the zero line of the AC line and neutral line. 第一电容Cl的另一端与正向变换电路的正输出端相连,也即与第一二极管Dl的负极相连。 The other end of the positive output terminal of the forward transform circuit first capacitor Cl is connected to, i.e. connected to the negative of the first diode Dl. 第二电容C2的另一端与负向变换电路的负输出端相连,也即与第二二极管D2的正极相连。 Negative output terminal of the second capacitor and the other end of the negative converter circuit C2 is connected to, i.e. connected to the anode of the second diode D2.

[0029] 在具体的实施例中,第一整流器Ql和第二整流器Q2可以同时为晶闸管,或者第一整流器Ql和第二整流器Q2可以同时为二极管,通常都为晶闸管。 [0029] In a particular embodiment, the first rectifier and the second rectifier Q2 Ql thyristors can be simultaneously, or the first rectifier and the second rectifier Ql Q2 may simultaneously be a diode, usually thyristors. 当第一整流器Ql和第二整流器Q2同为晶闸管时,该不间断电源还可以包括对应的晶闸管驱动电路(未示出),用于按照预定策略选择性地触发第一整流器Ql和第二整流器Q2的导通。 When the first and second rectifier Ql Q2 with thyristor rectifier, the thyristor uninterruptible power supply may further include a corresponding drive circuit (not shown), for triggering a first rectifier and a second rectifier Ql selectively according to a predetermined strategy Q2 is turned on. 通常情况下,是按照与市电交流电相同的频率触发第一整流器Ql和第二整流器Q2的导通。 Typically, the trigger is the first rectifier and the second rectifier Ql and Q2 according to the same mains frequency alternating current is turned on. 当第一整流器Ql和第二整流器Q2同为二极管时,可以降低一些成本,并且二极管的压降损耗也较晶闸管低, 但是此时该不间断电源还需要包括对应的母线软启动电路,此部分内容为本领域技术人员所易于思及的部分,不再赘述。 When the first and second rectifier Ql Q2 with diode rectifiers, can reduce some of the costs, and the loss of the diode voltage drop is also lower than a thyristor, but this time the uninterruptible power supply further includes a corresponding bus requires soft start circuit, this section content known to those skilled in the thinking and the easy part, not repeat them.

[0030] 在具体的实施例中,第一开关管Q7和第二开关管Q8可以同为MOSFET场效应管, 或第一开关管Q7和第二开关管Q8可以同为IGBT绝缘栅晶体管,该不间断电源还包括控制电路(未示出),该控制电路可以产生控制信号于第一开关管Q7和第二开关管Q8的控制极,该控制电路可以控制第一开关管Q7和第二开关管Q8按照预定策略在不同的导通状态和截止状态之间切换。 [0030] In a particular embodiment, the first switch and the second switch transistor Q7 Q8 MOSFET FET may be the same, or the first switch and the second switch transistor Q8 Q7 may be the same insulated gate transistor is an IGBT, the uninterruptible power supply further comprises a control circuit (not shown), the control circuit may generate a control signal to the first switch transistor Q7 and Q8 is a second switch, the control circuit may control the first switch and the second switch transistor Q7 Q8 is switched between different conductive state and off states according to a predetermined policy.

[0031] 当选择开关将具体形式为单相交流电或者三相交流电中的一相的交流电输入AC 接入整流电路时,控制电路可以在交流电输入AC处于正半周时控制第一开关管Q7在导通和截止两个状态之间切换,当第一开关管Q7导通时,交流电AC依次通过选择开关K1、第一整流器Ql、第一电感LI和第一开关管Q7后流入N线;当第一开关管Q7截止时,交流电AC 依次通过选择开关K1、第一整流器Ql、第一电感LI、第一二极管Dl和第一电容Cl后流入N 线。 [0031] When the selector switch to single-phase AC power or a specific form of a three-phase AC input AC access phase AC rectification circuit, the control circuit may control the first AC input AC switching transistor Q7 is turned in the positive half cycle switching between the two states oN and oFF, when the first switching transistor Q7 is turned on, an alternating current AC by sequentially selecting switch K1, Ql, the first rectifier, the first inductor LI and the first switch transistor Q7 flows into N line; when the first when a switch transistor Q7 is turned off, the alternating current AC by sequentially selecting switch K1, flows into the first N lines Ql, a rectifier, a first inductor LI, a first diode Dl and a first capacitor Cl. 经此过程,可以输出更为高质量的交流电正半周波形。 After this procedure, a high quality can be output more positive half cycle AC waveform.

[0032] 当选择开关将交流电输入AC接入整流电路时,控制电路可以在交流电输入AC处于负半周时控制第二开关管Q8在导通和截止两个状态之间切换,当第二开关管Q8导通时, 交流电AC从N线依次通过第二开关管Q8、第二电感L2、第二整流器Q2和选择开关Kl流入火线;当第二开关管Q8截止时,交流电AC从N线依次通过第二电容C2、第二二极管D2、第二电感L2、第二整流器Q2和选择开关Kl流入火线。 [0032] When the AC input selector switch access AC rectification circuit, the control circuit may control the second AC input AC switching transistor Q8 is switched between two states, on and off the negative half cycle, when the second switch when Q8 is turned on, an alternating current from the AC line N passes through a second switching transistor Q8, the second inductor L2, the second rectifier Q2 flows into the line of fire and a selection switch Kl; when the second switch transistor Q8 is turned off, the alternating current from the AC line passes through N a second capacitor C2, a second diode D2, the second inductor L2, the second rectifier and the selection switch Q2 flows Kl Firewire. 经此过程,可以输出更为高质量的交流电负半周波形。 After this procedure, a high quality can be output more negative half cycle of the AC waveform.

[0033] 当选择开关将电池BAT接入整流电路时,也即当该不间断电源采用电池进行工作时,控制电路可以采用两种控制方式控制开关管的导通与截止来给储能支路充电以便输出交流电。 [0033] When the selector switch to the battery BAT access rectifier circuit, i.e. when the uninterruptible power supply battery-operated, the control circuit may be controlled using two control methods of the switch to be turned on and off storage branch so as to output AC charging. 其中,一种控制方式米用分别为第一电容Cl和第二电容C2充电的方式,具体为: Wherein m in a controlled manner by respectively a first capacitor Cl and second capacitor C2 is charged manner, in particular:

[0034] 控制电路可以分别控制第一开关管Q7和第二开关管Q8在导通和截止两个状态之间切换以便输出交流电的正半周波形。 [0034] The control circuit can control the first switch transistor Q7 and the transistor Q8 to switch the second switch to output the positive half cycle AC waveform between the two states ON and OFF. 当第一开关管Q7导通且第二开关管Q8导通时,电池电流从电池BAT正极依次通过选择开关K1、第一整流器Q1、第一电感LI、第一开关管Q7、 第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电感LI和第二电感L2储能; 当第一开关管Q7截止且第二开关管Q8导通时,电池电流从电池BAT正极依次通过选择开关K1、第一整流器Ql、第一电感LI、第一二极管Dl、第一电容Cl、第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电容Cl充电。 When the first switching transistor Q7 is turned on and the second switch transistor Q8 is turned on, current flows from the battery BAT battery positive electrode by sequentially selecting switch K1, a first rectifier Q1, a first inductor LI, a first switching transistor Q7, a second switch Q8 and the second inductor L2 back into the negative electrode of the battery BAT, while the first inductor LI and the second energy storage inductor L2; when the first switch transistor Q7 is turned off and the second switch transistor Q8 is turned on, the positive electrode of the battery current from the battery BAT by sequentially selecting switch K1, Ql, the first rectifier, a first inductor LI, a first diode Dl, a first capacitor Cl, a second switching transistor Q8 and the second inductor L2 back into the negative electrode of the battery BAT, a first capacitor case Cl charging. 经此过程,可以输出交流电的正半周波形。 After this process, may output a positive half cycle of the AC waveform.

[0035] 控制电路可以分别控制第一开关管Q7和第二开关管Q8在导通和截止两个状态之间切换以便输出交流电的负半周波形。 [0035] The control circuit can control the first switch transistor Q7 and the transistor Q8 is switched to the second switching output AC negative half cycle of the waveform between the two states ON and OFF. 当第一开关管Q7导通且第二开关管Q8导通时,电池电流从电池BAT正极依次通过选择开关K1、第一整流器Q1、第一电感LI、第一开关管Q7、 第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电感LI和第二电感L2储能; 当第一开关管Q7导通且第二开关管Q8截止时,电池电流从电池BAT正极依次通过选择开关K1、第一整流器Ql、第一电感LI、第一开关管Q7、第二电容C2、第二二极管D2和第二电感L2后流回电池BAT负极,此时第二电容C2充电。 When the first switching transistor Q7 is turned on and the second switch transistor Q8 is turned on, current flows from the battery BAT battery positive electrode by sequentially selecting switch K1, a first rectifier Q1, a first inductor LI, a first switching transistor Q7, a second switch Q8 and the second inductor L2 back into the negative electrode of the battery BAT, while the first inductor LI and the second energy storage inductor L2; when the first switch transistor Q7 is turned on and the second switch transistor Q8 is turned off, the positive electrode of the battery current from the battery BAT by sequentially selecting switch K1, Ql, a first rectifier, a first inductor LI, a first switch transistor Q7, the second capacitor C2, the second diode D2 and the second inductor L2 back into the negative electrode of the battery BAT, at this time a second capacitor C2 is charged. 经此过程,可以输出交流电的正半周波形。 After this process, may output a positive half cycle of the AC waveform.

[0036] 其中,另外一种控制方式米用分别为第一电容Cl和第二电容C2充电和同时为第一电容Cl和第二电容C2充电的结合方式,具体为: [0036] wherein additionally in a controlled manner with the first meter and second capacitor Cl and capacitor C2 is charged simultaneously to the first capacitor Cl and second capacitor C2 is charged binding manner are, in particular:

[0037] 当第一开关管Q7导通且第二开关管Q8导通时,电池电流从电池BAT正极依次通过选择开关K1、第一整流器Q1、第一电感LI、第一开关管Q7、第二开关管Q8和第二电感L2 后流回电池BAT负极,此时可以为第一电感LI和第二电感L2储能;当第一开关管Q7截止且第二开关管Q8导通时,电池电流从电池BAT正极依次通过选择开关K1、第一整流器Q1、第一电感LI、第一二极管Dl、第一电容Cl、第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电容Cl充电;当第一开关管Q7导通且第二开关管Q8截止时,电池电流从电池BAT正极依次通过选择开关K1、第一整流器Ql、第一电感LI、第一开关管Q7、第二电容C2、 第二二极管D2和第二电感L2后流回电池BAT负极,此时第二电容C2充电;当第一开关管Q7截止且第二开关管Q3截止时,电池电流从电池BAT正极依次通过选择开关K1、第一整流器Q1、 [0037] When the first switching transistor Q7 is turned on and the second switch transistor Q8 is turned on, the battery current from the battery BAT through a positive sequence selection switch K1, a first rectifier Q1, a first inductor LI, a first switching transistor Q7, the first second switching transistor Q8 and the second inductor L2 back into the negative electrode of the battery BAT, at this time may be a first inductor LI and the second energy storage inductor L2; when the first switch transistor Q7 is turned off and the second switch transistor Q8 is turned on, the battery current from the positive electrode of the battery BAT by sequentially selecting switch K1, a first negative rectifier Q1, a first inductor LI, a first diode Dl, a first capacitor Cl, a second switch Q8 and the second inductor L2 back into the battery BAT, At this time, charging the first capacitor Cl; when the first switch transistor Q7 is turned on and the second switch transistor Q8 is turned off, the battery current from the battery BAT through a positive sequence selection switch K1, Ql, a first rectifier, a first inductor LI, a first switch transistor Q7, a second capacitor C2, the second diode D2 and the second inductor L2 back into the negative electrode of the battery BAT, a second capacitor C2 is charged at this time; when the first switch transistor Q7 is turned off and the second switch Q3 is turned off, battery current from the battery BAT through a positive sequence selection switch K1, a first rectifier Q1, 一电感LI、第一二极管D1、第一电容Cl、第二电容C2、第二二极管D2和第二电感L2后流回电池BAT负极,此时第一电容Cl和第二电容C2同时充电。 An inductor LI, the first diode D1, a first capacitor Cl, a second capacitor C2, the second diode D2 and the second inductor L2 back into the negative electrode of the battery BAT, then the first capacitor Cl and second capacitor C2 At the same time charging.

[0038] 显然,本领域技术人员已经可以意识到,控制电路通过预定策略控制第一开关管Q7和第二开关管Q8在不同的导通状态和截止状态之间变换,可以输出较高质量的交流电, 同时还可以对该不间断电源的功率因数进行校正,以达到期望的目的。 [0038] Obviously, those skilled in the art can be appreciated already, the control circuit of the first switch and the second switch transistor Q7 Q8 conversion between different conductive state and an off state by the predetermined control policy, may output a high-quality alternating current, but also can correct the power factor of the uninterruptible power supply to achieve the desired purpose. 通常情况下,控制电路控制第一开关管Q7和第二开关管Q8在不同的导通状态和截止状态之间变换的变换频率可以根据开关管的类型来选择,如果第一开关管Q7和第二开关管Q8同时是IGBT绝缘栅晶体管,则该变换频率一般小于40KHZ左右;如果第一开关管Q7和第二开关管Q8同时是MOSFET场效应管,则该变换频率一般为100KHZ左右。 Typically, the control circuit controls the first switch and the second switch transistor Q7 Q8 frequency conversion between different conductive state and OFF state transitions may be selected according to the type of switch, if the first and the second switching transistor Q7 while the second switching transistor Q8 is an IGBT insulated gate transistor, the transformation frequency is generally less than about 40KHZ; if the first switch transistor Q7 and the transistor Q8 is also the second switch MOSFET FET, the converted frequency is typically about 100KHZ.

[0039] 综上所述,本实施例一提供的不间断电源电路通过将电池部分置于整流电路之前,并通过例如继电器之类的选择开关来将电池部分接入电路拓扑,使得本发明实施例提供的不间断电源电路拓扑节省了一个晶闸管及配套组件,有效降低了损耗。 [0039] In summary, the uninterruptible power supply circuit according to a first embodiment of the present prior to the rectifying circuit through the battery portion is placed, for example, by selecting a relay switch or the like to access the portion of the battery circuit topology, such embodiment of the present invention uninterruptible power supply circuit topology saves embodiment provides a thyristor and related components, effectively reducing the loss.

[0040] 实施例二 [0040] Second Embodiment

[0041] 请参考图3,其示出了本发明实施例二提供的不间断电源电路的电路示意图。 [0041] Please refer to FIG. 3, which shows a circuit diagram of the present invention is an uninterruptible power supply circuit according to a second embodiment. 该不间断电源电路可以用于非独立控制三相交流电输入式不间断电源中。 The uninterruptible power supply circuit may be used to control non-independent phase AC input of the uninterruptible power supply. 图中仅示出了该不间断电源的主要电路部分,对于本领域技术人员所熟知的其它部分未予示出。 Showing only a portion of the main circuit of an uninterruptible power supply, to other portions of the person skilled in the art is not shown. 该不间断电源可以包括选择开关、整流电路、正向变换电路、负向变换电路和储能电路。 The uninterruptible power supply may include a selection switch, a rectifier circuit, the forward conversion circuit, the conversion circuit and the negative tank circuit.

[0042] 在本实施例中,由于交流电输入是三相交流电输入,所以选择开关可以对应包括有三个选择开关:第一选择开关、第二选择开关和第三选择开关,这三个选择开关可以都是单刀双掷型继电器,这三个继电器可以择一地分别将三相交流电中的一相交流电输入和电池输入分别接入整流电路的输入端中,这三个继电器的择一方式总是相同。 [0042] In the present embodiment, since the AC input is a three phase AC input, the selector switches correspond to three selection switch comprises: a first selection switch, the second selection switch and a third selection switch, three selector switches are SPDT relays, three relays may alternatively respectively phase AC input and a battery input in the three-phase AC input terminals respectively connected to the rectifier circuit, the alternative embodiment of the three relays are always the same. 也就是说,这三个选择开关可以在市电正常时,同时将三相交流电AC中的各单相交流电分别接入三支整流电路的输入端;或者在市电发生中断等意外情况时,同时将电池BAT接入三支整流电路的输入端。 That is, these three selector switches when the utility power is normal, while the three-phase AC power of each single-phase AC input terminals respectively connected in three rectifier circuit; when the mains failure or the like accident situation, while the access to the input terminal of the battery BAT three rectifier circuit. 将三相交流电AC中的各单相交流电分别接入三支整流电路的输入端主要是指:第一选择开关择一地将三相交流电中的一相交流电输入或电池输入接入第一整流电路的输入端;第二选择开关择一地将三相交流电中的另一相交流电输入或电池输入接入第二整流电路的输入端;第三选择开关择一地将三相交流电中的再一相交流电输入或电池输入接入第三整流电路的输入端。 The main three-phase AC power to each of the single-phase AC of the three rectifier circuit respectively connected input means: a first selection switch alternatively the phase AC input or a battery input in the first access rectifying three-phase AC input of the circuit; alternatively the second selection switch to another input terminal with the AC input or the battery input access the second three-phase AC rectification circuit; third selection switch alternatively again in the three-phase AC phase AC input or a battery input terminal accessing a third rectifier circuit. 当然,在不同的实施例中,也可以采用多个单刀单掷型继电器的组合或者双刀双掷型继电器配合控制策略实现择一接入的功能。 Of course, in various embodiments, may also be employed a plurality of single pole single throw relay or a combination of DPDT relay with a control strategy selection function access.

[0043] 整流电路用于实现将交流电转换为直流电。 [0043] The rectifying circuit for converting AC to DC power to implement. 在本实施例中,由于是三相交流电输入,所以整流电路也对应包括第一整流电路、第二整流电路和第三整流电路。 In the present embodiment, since the three-phase AC input, the rectification circuit includes a first rectifier circuit also corresponds to the second rectifier circuit, and a third rectifier circuit. 需要说明的是,在实施例一中所述的选择开关和整流电路相当于本实施例中的第一选择开关和第一整流电路。 Note that in the embodiment corresponds to the first selection switch and a first rectifying circuit in the present embodiment the selection switch and the rectifier circuit according to the first embodiment. 在本文中的第一、第二、第三等量词主要是为了便于描述,相应模块的具体含义在具体实施例中可以略有不同。 Herein the first, second, third, etc. quantifier primarily intended to facilitate in a particular embodiment may be described with slightly different specific meanings, the corresponding module. [0044] 第一整流电路可以包括串联的第一整流器Ql和第二整流器Q2。 [0044] The first circuit may comprise a first rectifier rectifying Ql and Q2 in series with the second rectifier. 第一整流器Ql的负极为第一整流电路的第一输出端,第二整流器Q2的正极为第一整流电路的第二输出端, 第一整流器Ql的正极和第二整流器Q2的负极相连于同一节点且该节点为第一整流电路的输入端,也即与前述选择开关中的第一个继电器相连的输入端。 Ql extremely negative first rectifier rectifying a first output terminal of the first circuit, a second positive output terminal of the first rectifier circuit is extremely second rectifier Q2, the anode of the first rectifier negative electrode of Ql and Q2 is connected to the second rectifier in the same a first node and the node input rectifier circuit, i.e. with the selector switch in the first relay connected to the input terminal.

[0045] 第二整流电路可以包括串联的第三整流器Q3和第四整流器Q4。 [0045] The second rectifier circuit may include a third and a fourth rectifier rectifiers Q3 Q4 connected in series. 第三整流器Q3的负极为第二整流电路的第三输出端,第四整流器Q4的正极为第二整流电路的第四输出端, 第三整流器Q3的正极和第四整流器Q4的负极相连于同一节点且该节点为第二整流电路的输入端,也即与前述选择开关中的第二个继电器相连的输入端。 Third rectifier Q3 is extremely negative third output of the second rectifier circuit, the output terminal of the second positive electrode is a fourth rectifier circuit of a fourth rectifier Q4, the negative electrode and the positive electrode of the third rectifier Q3 Q4 fourth rectifier connected to the same node and the node input of the second rectifier circuit, i.e. with the selector switch in the second relay is connected to the input terminal.

[0046] 第三整流电路可以包括串联的第五整流器Q5和第六整流器Q6。 [0046] The third rectifier circuit may comprise a fifth and a sixth rectifier rectifier Q5 Q6 connected in series. 第五整流器Q5的负极为第三整流电路的第五输出端,第六整流器Q6的正极为第三整流电路的第六输出端, 第五整流器Q5的正极和第六整流器Q6的负极相连于同一节点且该节点为第三整流电路的输入端,也即与前述选择开关中的第三个继电器相连的输入端。 Fifth output of the rectifier Q5 is extremely negative fifth third rectifying circuit, a sixth positive electrode is the negative electrode of Q6 output of the third rectifier circuit sixth rectifier, the rectifier positive fifth and sixth rectifier Q5 Q6 is connected to the same node and the node input of the third rectifier circuit, i.e. with the selector switch in the third input terminal connected to the relay.

[0047] 正向变换电路用于将整流后的直流电升压转换为正向电压加在储能支路的两个节点。 [0047] The forward conversion circuit for converting the rectified DC power is boosted forward voltage is applied to two branches of storage nodes. 正向变换电路包括第一电感LI、第一二极管Dl和第一开关管Q7,第一电感LI的一端与三支整流电路的第一输出端、第三输出端和第五输出端同时相接。 Q7, the first inductor LI and the end of the three first output terminal of the rectifier circuit, the third output terminal and a fifth output terminal of the forward conversion circuit comprising a first inductor LI, a first diode Dl and a first switch simultaneously phase. 第一电感LI的另一端分别与第一二极管Dl的正极和第一开关管Q7的一端相接,第一二极管Dl的负极为正向变换电路的正输出端,第一开关管Q7的另一端为正向变换电路的零输出端。 The other end of the first inductor LI are in contact with the end of the cathode of the first diode Dl and a first switching transistor Q7, the positive output terminal of the first diode Dl of the negative electrode is the forward transform circuit, a first switch the other end of the forward transform circuit Q7 zero output.

[0048] 负向变换电路用于将整流后的直流电压升压转换为负向电压加在储能支路的两个节点。 [0048] Negative circuit for converting a DC voltage to boost converter is a negative rectified voltage is applied to the two branches of the storage nodes. 负向变换电路包括第二电感L2、第二二极管D2和第二开关管Q8,第二电感L2的一端与三支整流电路的第二输出端、第四输出端和第六输出端同时相接。 Negative comprises a second inductor L2, the second diode D2 and a fourth output terminal Q8 of the second switching transistor, the second output terminal of the second inductor L2 at one end to three rectifier circuit, and a sixth output terminal of the conversion circuit while phase. 第二电感L2的另一端分别与第二二极管D2的负极和第二开关管Q8的一端相接,第二二极管D2的正极为负向变换电路的负输出端,第二开关管Q8的另一端为负向变换电路的零输出端。 The other end of the second inductor L2, respectively, and one end of the second diode D2 and a cathode in contact with a second switch transistor Q8, very positive negative negative output terminal of the conversion circuit the second diode D2, the second switch Q8 and the other end to the negative output terminal of the conversion circuit is zero.

[0049] 储能支路,包括串联的第一电容Cl和第二电容C2,第一电容Cl的一端和第二电容C2的一端相连于同一节点,且该节点与正向变换电路的零输出端、负向变换电路的零输出端和交流电AC的N线共同相连,第一电容Cl的另一端与正向变换电路的正输出端相连,也即与第一二极管Dl的负极相连。 [0049] The energy storage branch, including in series a first capacitance Cl and a second capacitor C2, and the ends of the first capacitor Cl of the second capacitor C2 is connected to the same node, and the node with the zero output of the forward transform circuit end, commonly connected to the negative output terminal of the zero and AC conversion circuit of the AC line N, and the other end connected to the positive output terminal of the forward transform circuit with a first capacitor Cl, i.e. the cathode of the first diode Dl is connected to. 第二电容C2的另一端与负向变换电路的负输出端相连, 也即与第二二极管D2的正极相连。 Negative output terminal of the second capacitor and the other end of the negative converter circuit C2 is connected to, i.e. connected to the anode of the second diode D2.

[0050] 在具体的实施例中,第一整流器Q1、第二整流器Q2、第三整流器Q3、第四整流器Q4、第五整流器Q5和第六整流器Q6可以同时为晶闸管,该不间断电源还可以包括对应的晶闸管驱动电路(未示出),用于按照预定策略选择性地触发这六个整流器的导通。 [0050] In a particular embodiment, the first rectifier Q1, a second rectifier Q2, third rectifier Q3, a fourth rectifier Q4, fifth and sixth rectifier Q5 Q6 simultaneously thyristor rectifier, the uninterruptible power supply can also be It includes corresponding thyristor drive circuit (not shown), for conducting a predetermined strategy to selectively trigger according to the six rectifier.

[0051] 在具体的实施例中,第一开关管Q7和第二开关管Q8可以同时为MOSFET场效应管,或第一开关管Q7和第二开关管Q8可以同时为IGBT绝缘栅晶体管,该不间断电源还包括控制电路(未示出),该控制电路可以产生控制信号于第一开关管Q7和第二开关管Q8的控制极,该控制电路可以控制第一开关管Q7和第二开关管Q8按照预定策略在不同的导通状态和截止状态之间切换。 [0051] In a particular embodiment, the first switch and the second switch transistor Q7 Q8 is a MOSFET field effect transistor may be simultaneously, or the first switch and the second switch transistor Q8 Q7 simultaneously insulated gate transistor is an IGBT, the uninterruptible power supply further comprises a control circuit (not shown), the control circuit may generate a control signal to the first switch transistor Q7 and Q8 is a second switch, the control circuit may control the first switch and the second switch transistor Q7 Q8 is switched between different conductive state and off states according to a predetermined policy.

[0052] 当三个选择开关同时将各相交流电AC接入各支整流电路时,也即当该不间断电源采用市电进行工作时,三相交流电同时共用正向变换电路、负向变换电路和储能支路。 [0052] When the select switch while the three-phase alternating current of each AC rectifier circuits each branch access, i.e. when the uninterruptible power supply using mains operated, while sharing a forward three-phase AC conversion circuit, the conversion circuit negative and energy storage branch. 晶闸管驱动电路通过有策略地触发各个整流器的导通,使得在同一时刻会有一正一负两相交流电同时工作。 Thyristor drive circuit triggered by strategically each rectifier is turned on so that there will be a two-phase alternating positive and negative work while at the same time. 另外,每一次切换只切换一相交流电,使得单个周期内,每相交流电的工作时间为2/3T,其中T为周期长度。 Further, each time only one switching of the switching phase AC, so that a single cycle, each phase alternating current working time 2 / 3T, where T is the cycle length.

[0053] 一方面,控制电路可以控制第一开关管Q7在导通和截止两个状态之间切换以便将整流后的正电压部分通过正向变换电路给第一电容Cl充电。 [0053] In one aspect, the control circuit may control the switching of the first switch transistor Q7 to the positive charging voltage of the rectified portion of the first capacitor Cl by a forward transform circuit between two states ON and OFF. 具体地讲,当第一开关管Q7 导通时,整流后的正电压部分依次通过第一电感LI和第一开关管Q7后流入N线;当第一开关管Q7截止时,整流后的正电压部分依次通过第一电感LI、第一二极管Dl和第一电容Cl 后流入N线。 Specifically, when the first switching transistor Q7 is turned on, a positive voltage after rectification section passes through the first inductor LI and the first switching transistor Q7 flows into the N line; when the first switch transistor Q7 is turned off, the rectified positive voltage portion passes through the first inductor LI, flows into the first diode Dl N line and a first capacitor Cl.

[0054] 另一方面,控制电路还可以控制第二开关管Q8在导通和截止两个状态之间切换以便将整流后的负电压部分通过负向变换电路给第二电容C2充电。 [0054] On the other hand, the control circuit may control the second switch transistor Q8 is switched to a negative voltage to the second portion of the rectified capacitor C2 is charged through the circuit in a negative direction between two states ON and OFF. 具体地将,当第二开关管Q8导通时,交流电从N线依次通过第二开关管Q8和第二电感L2与整流后的负电压部分相接;当第二开关管Q8截止时,交流电从N线依次通过第二电容C2、第二二极管D2和第二电感L2与整流后的负电压部分相接。 The particular, when the second switching transistor Q8 is turned on, AC power from line N by sequentially contacting the negative voltage portion of the second switch transistor Q8 and the second inductor L2 and the rectifier; When the second switch transistor Q8 is turned off, AC from the N line passes through a second capacitor C2, a negative voltage of the second portion of the second inductor L2 and the diode D2 and the rectifying contact.

[0055] 当三个继电器同时将电池BAT接入三支整流电路时,也即当该不间断电源采用电池进行工作时,晶闸管驱动电路可以采用同时触发奇数整流器的导通的控制策略。 [0055] When the battery BAT three relays simultaneously access three rectifier circuit, i.e. when the uninterruptible power supply battery-operated, the thyristor drive circuit may control strategy triggered simultaneously turned odd rectifier. 控制电路可以采用两种控制方式控制开关管的导通与截止来给储能支路充电以便输出交流电。 The control circuit two control methods may be employed to control switch turned on and off to charge energy storage branch to output an alternating current. 其中,一种控制方式米用分别为第一电容Cl和第二电容C2充电的方式,具体为: Wherein m in a controlled manner by respectively a first capacitor Cl and second capacitor C2 is charged manner, in particular:

[0056] 控制电路可以控制第一开关管Q7和第二开关管Q8在不同的导通和截止状态之间切换以便输出交流电的正半周波形。 [0056] The control circuit may control the first switch transistor Q7 and the transistor Q8 to switch the second switch to output the positive half cycle of the AC waveform is different between the ON and OFF states. 具体地讲,当第一开关管Q7导通且第二开关管Q8导通时,电池电流从电池BAT正极同时流经选择开关、第一整流器Q1、第三整流器Q3和第五整流器Q5后依次通过第一电感LI、第一开关管Q7、第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电感LI和第二电感L2储能;当第一开关管Q7截止且第二开关管Q8导通时,电池电流从电池BAT正极同时流经选择开关、第一整流器Q1、第三整流器Q3和第五整流器Q5后依次通过第一电感LI、第一二极管Dl、第一电容Cl、第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电容Cl充电。 Specifically, when the first switching transistor Q7 is turned on and the second switch transistor Q8 is turned on, a current flowing through the battery selection switch simultaneously from the positive electrode of the battery BAT, sequentially after a first rectifier Q1, Q3 and the fifth rectifier third rectifier Q5 the first inductor LI, a first switch Q7, Q8 after the second switch and the second inductor L2 back into the negative battery BAT, while the first inductor LI and the second energy storage inductor L2; transistor Q7 is turned off when the first switch and the second switch transistor Q8 is turned on, while current flowing through the battery from the battery BAT positive electrode selection switch, the first rectifier Q1, Q3 and the fifth rectifier third rectifier Q5 passes through the first inductor LI, a first diode Dl a first capacitor Cl, the second switch transistor Q8 and the second inductor L2 back into the negative electrode of the battery BAT, when charging the first capacitor Cl.

[0057] 控制电路还可以控制第一开关管Q7和第二开关管Q8在不同的导通和截止状态之间切换以便输出交流电的负半周波形。 [0057] The control circuit may further control the first switch and the second switch transistor Q7 Q8 is switched so as to output the negative half cycle of the AC waveform is different between the ON and OFF states. 具体地讲,当第一开关管Q7导通且第二开关管Q8 导通时,电池电流从电池BAT正极同时流经选择开关、第一整流器Q1、第三整流器Q3和第五整流器Q5后依次通过第一电感LI、第一开关管Q7、第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电感LI和第二电感L2储能;当第一开关管Q7导通且第二开关管Q8截止时,电池电流从电池BAT正极同时流经选择开关、第一整流器Q1、第三整流器Q3和第五整流器Q5后依次通过第一电感LI、第一开关管Q7、第二电容C2、第二二极管D2和第二电感L2后流回电池BAT负极,此时第二电容C2充电。 Specifically, when the first switching transistor Q7 is turned on and the second switch transistor Q8 is turned on, a current flowing through the battery selection switch simultaneously from the positive electrode of the battery BAT, sequentially after a first rectifier Q1, Q3 and the fifth rectifier third rectifier Q5 the first inductor LI, a first switching transistor Q7, Q8 after the second switch and the second inductor L2 back into the negative electrode of the battery BAT, while the first inductor LI and the second energy storage inductor L2; when the first switch Q7 are turned when transistor Q8 on and the second switch is turned off, the battery current flowing from the battery BAT while positive selection switch, a first rectifier Q1, Q3 and the fifth rectifier third rectifier Q5 passes through the first inductor LI, a first switch transistor Q7, a second capacitor C2, the second diode D2 and the second inductor L2 back into the negative electrode of the battery BAT, a second capacitor C2 is charged at this time.

[0058] 其中,另外一种控制方式米用分别为第一电容Cl和第二电容C2充电和同时为第一电容Cl和第二电容C2充电的结合方式,具体为: [0058] wherein additionally in a controlled manner with the first meter and second capacitor Cl and capacitor C2 is charged simultaneously to the first capacitor Cl and second capacitor C2 is charged binding manner are, in particular:

[0059] 当第一开关管Q7导通且第二开关管Q8导通时,电池电流从电池BAT正极同时流经选择开关、第一整流器Ql、第三整流器Q3和第五整流器Q5后依次通过第一电感LI、第一开关管Q7、第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电感LI和第二电感L2储能;当第一开关管Q7截止且第二开关管Q8导通时,电池电流从电池BAT正极同时流经选择开关、第一整流器Ql、第三整流器Q3和第五整流器Q5后依次通过第一电感LI、第一二极管Dl、第一电容Cl、第二开关管Q8和第二电感L2后流回电池BAT负极,此时第一电容Cl充电;当第一开关管Q7导通且第二开关管Q8截止时,电池电流从电池BAT正极同时流经选择开关、第一整流器Ql、第三整流器Q3和第五整流器Q5后依次通过第一电感LI、第一开关管Q7、第二电容C2、第二二极管D2和第二电感L2后流回电池BAT负极,此时第二电容C2充电; [0059] When the first switching transistor Q7 is turned on and the second switch transistor Q8 is turned on, the battery while the positive current flows from the battery BAT selection switch Ql, the first rectifier, the third rectifier Q3 and Q5 passes through a fifth rectifier a first inductor LI, a first switching transistor Q7, Q8 of the second switching transistor and the second inductor L2 back into the negative electrode of the battery BAT, while the first inductor LI and the second energy storage inductor L2; when the first switch is turned off and transistor Q7 the second switch transistor Q8 is turned on, the battery while the positive current flows from the battery BAT selection switch Ql, the first rectifier, the third rectifier Q3 and Q5 fifth rectifier passes through the first inductor LI, a first diode Dl, a first capacitor Cl, the second switch transistor Q8 and the second inductor L2 back into the negative electrode of the battery BAT, when charging the first capacitor Cl; when the first switch transistor Q7 is turned on and the second switch transistor Q8 is turned off, current flows from the battery the positive electrode of the battery BAT at the same time via the selection switch Ql, the first rectifier, the third rectifier fifth rectifier Q3 and Q5 passes through the first inductor LI, a first switch transistor Q7, a second capacitor C2, a diode D2 and a second after two inductor L2 back into the negative electrode of the battery BAT, a second capacitor C2 is charged at this time; 当第一开关管Q7截止且第二开关管Q8截止时,电池电流从电池BAT正极同时流经选择开关、第一整流器Ql、第三整流器Q3和第五整流器Q5后依次通过第一电感LI、第一二极管Dl、第一电容Cl、第二电容C2、第二二极管D2和第二电感L2后流回电池BAT负极,此时第一电容Cl和第二电容C2同时充电。 When the first switching transistor Q7 is turned off and the second switch transistor Q8 is turned off, the battery current flowing from the battery BAT while positive selection switch Ql, the first rectifier, the third rectifier Q3 and Q5 fifth rectifier passes through the first inductor LI, a first diode Dl, a first capacitor Cl, the second capacitor C2, the second diode D2 and the second inductor L2 back into the negative electrode of the battery BAT, then the first capacitor Cl and second capacitor C2 is simultaneously charged.

[0060] 显然,本领域技术人员已经可以意识到,控制电路通过预定策略控制第一开关管Q7和第二开关管Q8在不同的导通状态和截止状态之间变换,可以输出较高质量的交流电, 同时还可以对该不间断电源的功率因数进行校正,以达到期望的目的。 [0060] Obviously, those skilled in the art can be appreciated already, the control circuit of the first switch and the second switch transistor Q7 Q8 conversion between different conductive state and an off state by the predetermined control policy, may output a high-quality alternating current, but also can correct the power factor of the uninterruptible power supply to achieve the desired purpose.

[0061] 综上所述,本实施例二提供的不间断电源电路通过将电池部分置于整流电路之前,并通过例如继电器之类的选择开关来将电池部分接入电路拓扑,使得本发明实施例提供的不间断电源电路拓扑节省了三个晶闸管及配套组件,有效降低了损耗。 [0061] In summary, the uninterruptible power supply circuit according to a second embodiment of the present prior to the rectifying circuit through the battery portion is placed, for example, by selecting a relay switch or the like to access the portion of the battery circuit topology, such embodiment of the present invention uninterruptible power supply circuit topology provides savings three thyristors and related components, effectively reducing the loss.

[0062] 实施例三 [0062] Example three

[0063] 请参考图4,其示出了本发明实施例三提供的不间断电源电路的电路示意图。 [0063] Please refer to FIG 4, which shows a circuit diagram of the present invention is an uninterruptible power supply circuit according to a third embodiment. 该不间断电源电路可以用于独立控制三相交流电输入式不间断电源中。 The uninterruptible power supply circuit may be a three-phase AC input for independently controlling the uninterruptible power supply. 图中仅示出了该不间断电源的主要电路部分,对于本领域技术人员所熟知的其它部分未予示出。 Showing only a portion of the main circuit of an uninterruptible power supply, to other portions of the person skilled in the art is not shown. 该不间断电源可以包括选择开关、整流电路、正向变换电路、负向变换电路和储能电路。 The uninterruptible power supply may include a selection switch, a rectifier circuit, the forward conversion circuit, the conversion circuit and the negative tank circuit.

[0064] 在本实施例中,由于交流电输入是三相交流电输入,所以选择开关可以对应包括有三个选择开关:第一选择开关、第二选择开关和第三选择开关,这三个选择开关可以都是单刀双掷型继电器,这三个继电器可以择一地分别将三相交流电中的一相交流电输入和电池输入分别接入整流电路的输入端中,这三个继电器的择一方式总是相同。 [0064] In the present embodiment, since the AC input is a three phase AC input, the selector switches correspond to three selection switch comprises: a first selection switch, the second selection switch and a third selection switch, three selector switches are SPDT relays, three relays may alternatively respectively phase AC input and a battery input in the three-phase AC input terminals respectively connected to the rectifier circuit, the alternative embodiment of the three relays are always the same. 也就是说,这三个选择开关可以在市电正常时,同时将三相交流电AC中的各单相交流电分别接入三支整流电路的输入端;或者在市电发生中断等意外情况时,同时将电池BAT接入三支整流电路的输入端。 That is, these three selector switches when the utility power is normal, while the three-phase AC power of each single-phase AC input terminals respectively connected in three rectifier circuit; when the mains failure or the like accident situation, while the access to the input terminal of the battery BAT three rectifier circuit. 将三相交流电AC中的各单相交流电分别接入三支整流电路的输入端主要是指:第一选择开关择一地将三相交流电中的一相交流电输入或电池输入接入第一整流电路的输入端;第二选择开关择一地将三相交流电中的另一相交流电输入或电池输入接入第二整流电路的输入端;第三选择开关择一地将三相交流电中的再一相交流电输入或电池输入接入第三整流电路的输入端。 The main three-phase AC power to each of the single-phase AC of the three rectifier circuit respectively connected input means: a first selection switch alternatively the phase AC input or a battery input in the first access rectifying three-phase AC input of the circuit; alternatively the second selection switch to another input terminal with the AC input or the battery input access the second three-phase AC rectification circuit; third selection switch alternatively again in the three-phase AC phase AC input or a battery input terminal accessing a third rectifier circuit. 当然,在不同的实施例中,也可以采用多个单刀单掷型继电器的组合或者双刀双掷型继电器配合控制策略实现择一接入的功能。 Of course, in various embodiments, may also be employed a plurality of single pole single throw relay or a combination of DPDT relay with a control strategy selection function access.

[0065] 整流电路用于实现将交流电转换为直流电。 [0065] The rectifying circuit for converting AC to DC power to implement. 在本实施例中,由于是三相交流电输入,所以整流电路也对应包括第一整流电路、第二整流电路和第三整流电路。 In the present embodiment, since the three-phase AC input, the rectification circuit includes a first rectifier circuit also corresponds to the second rectifier circuit, and a third rectifier circuit. 需要说明的是,在实施例一中所述的选择开关和整流电路相当于本实施例中的第一选择开关和第一整流电路。 Note that in the embodiment corresponds to the first selection switch and a first rectifying circuit in the present embodiment the selection switch and the rectifier circuit according to the first embodiment. 在本文中的第一、第二、第三等量词主要是为了便于描述,相应模块的具体含义在具体实施例中可以略有不同。 Herein the first, second, third, etc. quantifier primarily intended to facilitate in a particular embodiment may be described with slightly different specific meanings, the corresponding module.

[0066] 第一整流电路可以包括串联的第一整流器Ql和第二整流器Q2。 [0066] The first circuit may comprise a first rectifier rectifying Ql and Q2 in series with the second rectifier. 第一整流器Ql的负极为第一整流电路的第一输出端,第二整流器Q2的正极为第一整流电路的第二输出端, 第一整流器Ql的正极和第二整流器Q2的负极相连于同一节点且该节点为第一整流电路的输入端,也即与前述选择开关中的第一个继电器相连的输入端。 Ql extremely negative first rectifier rectifying a first output terminal of the first circuit, a second positive output terminal of the first rectifier circuit is extremely second rectifier Q2, the anode of the first rectifier negative electrode of Ql and Q2 is connected to the second rectifier in the same a first node and the node input rectifier circuit, i.e. with the selector switch in the first relay connected to the input terminal. [0067] 第二整流电路可以包括串联的第三整流器Q3和第四整流器Q4。 [0067] The second rectifier circuit may include a third rectifier and a fourth rectifier Q3 Q4 connected in series. 第三整流器Q3的负极为第二整流电路的第三输出端,第四整流器Q4的正极为第二整流电路的第四输出端, 第三整流器Q3的正极和第四整流器Q4的负极相连于同一节点且该节点为第二整流电路的输入端,也即与前述选择开关中的第二个继电器相连的输入端。 Third rectifier Q3 is extremely negative third output of the second rectifier circuit, the output terminal of the second positive electrode is a fourth rectifier circuit of a fourth rectifier Q4, the negative electrode and the positive electrode of the third rectifier Q3 Q4 fourth rectifier connected to the same node and the node input of the second rectifier circuit, i.e. with the selector switch in the second relay is connected to the input terminal.

[0068] 第三整流电路可以包括串联的第五整流器Q5和第六整流器Q6。 [0068] The third rectifier rectifying circuit may comprise a fifth and a sixth rectifier Q5 Q6 connected in series. 第五整流器Q5的负极为第三整流电路的第五输出端,第六整流器Q6的正极为第三整流电路的第六输出端, 第五整流器Q5的正极和第六整流器Q6的负极相连于同一节点且该节点为第三整流电路的输入端,也即与前述选择开关中的第三个继电器相连的输入端。 Fifth output of the rectifier Q5 is extremely negative fifth third rectifying circuit, a sixth positive electrode is the negative electrode of Q6 output of the third rectifier circuit sixth rectifier, the rectifier positive fifth and sixth rectifier Q5 Q6 is connected to the same node and the node input of the third rectifier circuit, i.e. with the selector switch in the third input terminal connected to the relay.

[0069] 与实施例二不同的是,由于本实施例中为独立控制的三相交流电输入,故各个整流电路并非是共用同一正向变换电路和负向变换电路,而是分别具有独自的正向变换电路和负向变换电路。 [0069] and according to a second embodiment except that, since the present embodiment, a three-phase AC input is controlled independently, so that each rectifier circuit not share the same conversion circuit positive and negative conversion circuit, but each has its own positive to the conversion circuit and the conversion circuit negative.

[0070] 正向变换电路用于将整流后的直流电升压转换为正向电压加在储能支路的两个节点,在本实施例中,正向变换电路包括第一正向变换电路、第二正向变换电路和第三正向变换电路,与各支整流电路分别对应。 [0070] The forward transform circuit for converting the rectified DC power is boosted forward voltage is applied to two branches of the storage nodes, in the present embodiment, the forward conversion circuit comprising a first forward conversion circuit, second forward conversion circuit and the third forward conversion circuit, the rectifier circuit corresponds to each branch, respectively. 负向变换电路用于将整流后的直流电压升压转换为负向电压加在储能支路的两个节点,在本实施例中,负向变换电路包括第一负向变换电路、 第二负向变换电路和第三负向变换电路,也与各支整流电路分别对应。 Negative circuit for converting the boosted DC voltage to convert the rectified negative voltage is applied to two branches of the storage nodes, in the present embodiment, the conversion circuit comprises a first negative negative conversion circuit, a second negative negative conversion circuit and the third conversion circuit, also correspond to the respective rectifier circuits branched.

[0071] 第一正向变换电路包括第一电感LI,第一电感LI的一端与第一整流电路的第一输出端相接,也即第一整流器Ql的负极。 [0071] The first forward conversion circuit comprising a first inductor LI, a first inductor LI and the first output terminal of the first rectifier circuit, one end in contact, i.e. the cathode of the first rectifier Ql. 第一电感LI的另一端分别与第一二极管Dl的正极和第一开关管Q7的一端相接,第一二极管Dl的负极为第一正向变换电路的正输出端,第一开关管Q7的另一端为第一正向变换电路的零输出端。 The other end of the first inductor LI are in contact with the end of the cathode of the first diode Dl and a first switching transistor Q7, the first diode Dl to the positive output terminal of the first negative electrode is the forward transform circuit, a first the other end of the first switch transistor Q7 is a zero forward transform circuit output terminal.

[0072] 第一负向变换电路包括第二电感L2,第二电感L2的一端与第一整流电路的第二输出端相接,也即第二整流器Q2的正极。 [0072] The first conversion circuit comprises a negative second inductor L2, the second output terminal of the second inductor L2 at one end in contact with the first rectifier circuit, i.e., the cathode of the second rectifier Q2. 第二电感L2的另一端分别与第二二极管D2的负极和第二开关管Q8的一端相接,第二二极管D2的正极为第一负向变换电路的负输出端,第二开关管Q8的另一端为第一负向变换电路的零输出端。 The other end of the second inductor L2, respectively, and one end of the second diode D2 and a cathode in contact with a second switch transistor Q8, to the positive pole of the first conversion circuit negative negative output terminal of the second diode D2, the second the other end of the first switching transistor Q8 conversion circuit negative terminal of the zero output.

[0073] 第二正向变换电路包括第三电感L3,第三电感L3的一端与第二整流电路的第三输出端相接,也即第三整流器Q3的负极。 [0073] The second forward conversion circuit comprising a third inductor L3, a third inductor L3 and the third output terminal of the second rectifying circuit, one end in contact, i.e. the anode of the third rectifier Q3. 第三电感L3的另一端分别与第三二极管D3的正极和第三开关管Q9的一端相接,第三二极管D3的负极为第二正向变换电路的正输出端,第三开关管Q9的另一端为第二正向变换电路的零输出端。 One end of the positive electrode and the other end of the third inductor L3, respectively of the third diode D3 and the third switch transistor Q9 is engaged, the third diode D3 is extremely negative positive output terminal of the second forward conversion circuit, the third zero output at the other end of the second switching transistor Q9 forward transform circuit.

[0074] 第二负向变换电路包括第四电感L4,第四电感L4的一端与第二整流电路的第四输出端相接,也即第四整流器Q4的正极。 [0074] The second conversion circuit includes a negative fourth inductor L4, the fourth inductor L4 and the fourth output terminal of the second rectifier circuit, one end in contact, i.e. the cathode of the fourth rectifier Q4. 第四电感L4的另一端分别与第四二极管D4的负极和第四开关管QlO的一端相接,第四二极管D4的正极为第二负向变换电路的负输出端, 第四开关管QlO的另一端为第二负向变换电路的零输出端。 The other end of the fourth inductor L4, respectively, and one end of the negative electrode of the fourth switching transistor QlO contact with the fourth diode D4, to the positive pole of the second conversion circuit negative negative output terminal of the fourth diode D4, the fourth zero output at the other end of the second switching transistor QlO negative conversion circuit.

[0075] 第三正向变换电路包括第五电感L5,第五电感L5的一端与第三整流电路的第五输出端相接,也即第五整流器Q5的负极。 [0075] The third forward transform circuit comprises a fifth inductor L5, the fifth inductor L5 fifth output end in contact with the third rectifying circuit, i.e., the negative electrode of the fifth rectifier Q5. 第五电感L5的另一端分别与第五二极管D5的正极和第五开关管Qll的一端相接,第五二极管D5的负极为第三正向变换电路的正输出端, 第五开关管Qll的另一端为第三正向变换电路的零输出端。 The other end of the fifth inductor L5 and the end of the cathode, respectively, and the fifth diode D5 of the fifth switching transistor Qll contact, the fifth diode D5 is very negative positive output terminal of the third forward conversion circuit, the fifth the other end of the third switching transistor Qll is a zero forward transform circuit output terminal.

[0076] 第三负向变换电路包括第六电感L6,第六电感L6的一端与第三整流电路的第六输出端相接,也即第六整流器Q6的正极,第六电感L6的另一端分别与第六二极管D6的负极和第六开关管Q12的一端相接,第六二极管D6的正极为第三负向变换电路的负输出端,第六开关管Q12的另一端为第三负向变换电路的零输出端。 [0076] The conversion circuit comprises a third negative sixth inductor L6, the sixth inductor L6 and the sixth output terminal of the third rectifying circuit, one end in contact, i.e. the positive electrode of the sixth rectifier Q6, and the other end of the sixth inductor L6 One end of the negative electrode, respectively, and the sixth switching transistor Q12 is in contact with a sixth diode D6, a third very positive negative negative output terminal of the inverter circuit a sixth diode D6, the other end of the sixth switching transistor Q12 is zero negative output of the third inverter circuit.

[0077] 储能支路,包括串联的第一电容Cl和第二电容C2,第一电容Cl的一端和第二电容C2的一端相连于同一节点,且该节点与三支正向变换电路的零输出端、三支负向变换电路的零输出端和交流电AC的N线共同相连,第一电容Cl的另一端与三支正向变换电路的正输出端相连。 [0077] The energy storage branch, comprising a first capacitor Cl and second capacitor C2, one end of the first capacitor Cl and second capacitor C2 is connected to the same end node in the series, and the node with three forward transform circuits zero output terminal connected in common to the three negative output terminal of the zero and AC conversion circuit of the N AC line, the other end of the first capacitor Cl of the forward transform and three circuit connected to the positive output terminal. 第二电容C2的另一端与三支负向变换电路的负输出端相连。 The second capacitor is connected to the negative output terminal and the negative terminal of the other of the three conversion circuit C2.

[0078] 同时需要说明的是,在本实施例中,还需要使用用于隔离的第七二极管D7、第八二极管D8和第九二极管D9分别将第一整流电路的第二输出端、第二整流电路的第四输出端和第三整流电路的第六输出端与电池BAT的负极相连。 [0078] Note that while, in the present embodiment, it is also required for isolating a seventh diode D7, the eighth diode D8 and the ninth diode D9, respectively, of the first rectifier circuit second output terminal connected to the sixth output terminal and the fourth output terminal of the third rectifier circuit and the second rectifier circuit the negative electrode of the battery BAT. 换句话说,第七二极管D7将第一整流电路的第二输出端与电池BAT的负极相连;第八二极管D8将第二整流电路的第四输出端与电池BAT的负极相连;第九二极管D9将第三整流电路的第六输出端与电池BAT的负极相连 In other words, the seventh diode D7 of the second output of the first rectifier circuit and the negative terminal of the battery BAT; eighth diode D8 is connected to the fourth output terminal of the second rectifier circuit and a negative electrode of the battery BAT; the ninth diode D9 is connected to the sixth output terminal of the third rectifier circuit and the negative electrode of the battery BAT

[0079] 在具体的实施例中,第一整流器Q1、第二整流器Q2、第三整流器Q3、第四整流器Q4、第五整流器Q5和第六整流器Q6可以同时为晶闸管,或第一整流器Q1、第二整流器Q2、 第三整流器Q3、第四整流器Q4、第五整流器Q5和第六整流器Q6可以同时为二极管,通常同时为晶闸管。 [0079] In a particular embodiment, the first rectifier Q1, a second rectifier Q2, third rectifier Q3, a fourth rectifier Q4, fifth and sixth rectifier Q5 Q6 simultaneously thyristor rectifier, or a first rectifier Q1, second rectifier Q2, third rectifier Q3, a fourth rectifier Q4, Q5 and sixth rectifier fifth rectifier diode Q6 can be simultaneously, usually thyristors simultaneously. 当各个整流器为晶闸管时,该不间断电源还可以包括对应的晶闸管驱动电路(未示出),用于按照预定策略选择性地触发各个整流器的导通。 When each thyristor rectifier, the uninterruptible power supply may further comprise a thyristor corresponding drive circuit (not shown), for triggering the conduction of the respective rectifier selectively according to a predetermined strategy. 当各个整流器为二极管时,可以降低一些成本,并且二极管的压降损耗也较晶闸管低,但是此时该不间断电源还需要包括对应的母线软启动电路,此部分内容乃本领域技术人员所易于思及的内容,本文不再赘述。 When each of the rectifier diode, can reduce some of the costs, and the loss of the diode voltage drop is also lower than a thyristor, but this time the uninterruptible power supply further includes a corresponding bus requires soft start circuit, this is the part of the skilled artisan readily thought and content, this will not go.

[0080] 在具体的实施例中,第一开关管Q7、第二开关管Q8、第三开关管Q9、第四开关管Q10、第五开关管Qll和第六开关管Q12可以同时为MOSFET场效应管,第一开关管Q7、第二开关管Q8、第三开关管Q9、第四开关管Q10、第五开关管Qll和第六开关管Q12可以同时为IGBT绝缘栅晶体管,该不间断电源还可以包括控制电路(未示出),该控制电路可以产生控制信号给各个开关管的控制极。 [0080] In a particular embodiment, the first switching transistor Q7, Q8 of the second switching transistor, the third switching transistor Q9, the fourth switching transistor Q10, Qll fifth switch and the sixth switch transistor Q12 is a MOSFET field simultaneously effect transistor, a first switch transistor Q7, Q8 of the second switching transistor, the third switching transistor Q9, the fourth switching transistor Q10, Qll fifth switch and the sixth switch transistor Q12 is simultaneously IGBT insulated gate transistor, the uninterruptible power supply may further include a control circuit (not shown), the control circuit may generate a control signal to each of the switching tube. 该控制电路可以控制第一开关管Q7、第二开关管Q8、第三开关管Q9、第四开关管Q10、第五开关管Qll和第六开关管Q12按照预定策略在不同的导通状态和截止状态之间切换。 The control circuit may control the first switch transistor Q7, a second switching transistor Q8, the third switching transistor Q9, the fourth switching transistor Q10, Qll fifth switch and the sixth switch transistor Q12 according to a predetermined strategy in different conducting state and switching between the oFF state.

[0081] 当三个选择开关同时将各相交流电AC接入各支整流电路时,也即当该不间断电源采用市电进行工作时,三相交流电分别独立工作,在同一时刻将会有两支正向变换电路和一支负向变换电路或者一支正向变换电路和两支负向变换电路同时工作。 [0081] When the select switch while the three-phase alternating current of each AC rectifier circuits each branch access, i.e. when the uninterruptible power supply using electricity to work, work independently are three-phase AC, there will be two at the same time and a forward transform circuit branch negative operating simultaneously converting circuit converting circuit, or to a forward transform circuit and two negative. 控制电路控制第一开关管Q7和第二开关管Q8的控制策略可以参考实施例一中所述的单相控制方法;控制电路控制第三开关管Q9和第四开关管QlO的控制策略也可以参考实施例一中所述的单相控制方法;控制电路控制第五开关管Qll和第六开关管Q12的控制策略还可以参考实施例一中所述的单相控制方法。 The control circuit controls the first switch and the second switch control strategy transistor Q8 Q7 may be a single-phase control method in the embodiment with reference to embodiments; policy control circuit controls the third switch and the fourth switch transistor Q9 may also be QlO a single phase in the control method described with reference to embodiments; policy control circuit controls the fifth switch and the sixth switch transistor Qll Q12 may also refer to a single-phase control method in the embodiment. 也就是说,每相交流电的控制策略如实施例一中所述的单相控制方法,三相交流电的控制策略互相结合可以使三相交流电完全同步控制,也可以模拟市电输入使每相交流电之间错相2/3JI控制。 That is, each phase of the AC control strategies such as a single-phase control method in the embodiment, the control strategy combined with each other three-phase AC three-phase alternating current can be fully synchronized control, can simulate that each phase mains input AC phase error between 2 / 3JI control.

[0082] 对应地,当三个选择开关同时将电池输入接入各支整流电路时,也即当该不间断电源采用电池BAT进行工作时,控制电路控制第一开关管Q7和第二开关管Q8的控制策略可以参考实施例一中所述的单相控制方法;控制电路控制第三开关管Q9和第四开关管QlO 的控制策略也可以参考实施例一中所述的单相控制方法;控制电路控制第五开关管Qll和第六开关管Q12的控制策略还可以参考实施例一中所述的单相控制方法。 [0082] Correspondingly, when the three input select switch while the battery of each branch access rectifier circuit, i.e. when the uninterruptible power supply using a battery BAT operated, the control circuit controls the first switch and the second switch transistor Q7 Q8 control strategy may be a single-phase control method in the embodiment with reference to embodiments; policy control circuit controls the third switch and the fourth switch transistor Q9 QlO may also refer to a single-phase control method in the embodiment; the control circuit controls the fifth switch and the sixth switch transistor Q12 Qll control strategy can also refer to a single-phase control method in the embodiment. 也就是说,每相交流电的控制策略如实施例一中所述的单相控制方法,三相交流电的控制策略互相结合可以使三相交流电完全同步控制,也可以模拟市电输入使每相交流电之间错相2/3 31控制。 That is, each phase of the AC control strategies such as a single-phase control method in the embodiment, the control strategy combined with each other three-phase AC three-phase alternating current can be fully synchronized control, can simulate that each phase mains input AC out of phase control between 31 2/3.

[0083] 显然,本领域技术人员已经可以意识到,控制电路通过预定策略控制三对开关管在不同的导通状态和截止状态之间变换,可以输出较高质量的交流电,同时还可以对该不间断电源的功率因数进行校正,以达到期望的目的。 [0083] Obviously, those skilled in the art can be appreciated already, the control circuit pipe between different conductive state and OFF state transitions through a predetermined control policy three pairs of switches, the output of higher quality can be AC, while the can uninterruptible power factor correction, to achieve the desired purpose.

[0084] 综上所述,本实施例三提供的不间断电源电路通过将电池部分置于整流电路之前,并通过例如继电器之类的选择开关来将电池部分接入电路拓扑,使得本发明实施例提供的不间断电源电路拓扑节省了三个晶闸管及配套组件,有效降低了损耗。 [0084] In summary, the uninterruptible power supply circuit according to a third embodiment of the present prior to the rectifying circuit through the battery portion is placed, for example, by selecting a relay switch or the like to access the portion of the battery circuit topology, such embodiment of the present invention uninterruptible power supply circuit topology provides savings three thyristors and related components, effectively reducing the loss. 虽然实施例三中使用了六个电感,但是该六个电感都比较小,相较于现有技术的同类产品,损耗仍然较低。 Although three in the embodiment uses six inductors, but the six inductors are relatively small, compared to the prior art similar products, consumption is still low.

[0085] 本领域普通技术人员可以理解实现上述实施例的全部或部分步骤可以通过硬件来完成,也可以通过程序来指令相关的硬件完成,所述的程序可以存储于一种计算机可读存储介质中,上述提到的存储介质可以是只读存储器,磁盘或光盘等。 [0085] Those of ordinary skill in the art may understand that the above embodiments all or part of the steps may be implemented by hardware, by a program instruction may be relevant hardware, the program may be stored in a computer-readable storage medium in the above-mentioned storage medium may be a read-only memory, magnetic or optical disk.

[0086] 以上所述仅为本发明的较佳实施例,并不用以限制本发明,凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 [0086] The foregoing is only preferred embodiments of the present invention, not intended to limit the present invention within the spirit and principle of the present invention, any modification, equivalent replacement, or improvement, it should be included in the present within the scope of the invention.

Claims (12)

  1. 1. 一种不间断电源电路,其特征在于,包括:选择开关、整流电路、正向变换电路、负向变换电路、储能支路;所述选择开关择一地将交流电输入中的一相或电池输入接入所述整流电路的输入端, 其中,所述交流电输入为单相交流电或三相交流电;所述整流电路,包括串联的第一整流器和第二整流器,所述第一整流器的负极为所述整流电路的第一输出端,所述第二整流器的正极为所述整流电路的第二输出端,所述第一整流器的正极和所述第二整流器的负极相连于同一节点,且所述节点为所述整流电路的输入端;所述正向变换电路,包括第一电感、第一二极管和第一开关管,所述第一电感的一端接所述整流电路的第一输出端,所述第一电感的另一端分别与第一二极管的正极和第一开关管的一端相接,所述第一二极管的负极为所述正向变换电路的正输 1. An uninterruptible power supply circuit, characterized by comprising: a selection switch, a rectifier circuit, the forward conversion circuit, the conversion circuit negative energy storage branch; alternatively the selection switch to the AC input in a phase or access to the battery input rectifier circuit input terminal, wherein the input is a single phase AC or three-phase AC power; the rectifier circuit, comprising a first and second rectifiers connected in series, the first rectifier a first negative output terminal of the rectifier circuit is very, very positive output terminal of said second rectifier circuit of said second rectifier, said first rectifier positive electrode and the negative electrode of said second rectifier connected to the same node, and the node is an input terminal of the rectifier circuit; said forward conversion circuit comprising a first inductor, a first diode and a first switch, a first end of the rectifier circuit of the first inductor an output terminal, the other end of the first inductor are in contact with the end of the cathode of the first diode and the first switch transistor, the first diode anode is the positive input of the forward transform circuit 端,所述第一开关管的另一端为所述正向变换电路的零输出端;所述负向变换电路,包括第二电感、第二二极管和第二开关管,所述第二电感的一端接所述整流电路的第二输出端,所述第二电感的另一端分别与第二二极管的负极和第二开关管的一端相接,所述第二二极管的正极为所述负向变换电路的负输出端,所述第二开关管的另一端为所述负向变换电路的零输出端;所述储能支路,包括串联的第一电容和第二电容,所述第一电容的一端和第二电容的一端相连于同一节点,且所述节点与所述零输出端和所述交流电的零线相连,所述第一电容的另一端与所述正输出端相连;所述第二电容的另一端与所述负输出端相连。 End, the output is zero in the forward conversion circuit and the other end of the first switch tube; said negative converting circuit including a second inductor, a second diode and a second switch, the second a second output end of the rectifier circuit inductance, the other end of the second inductor with one end of the negative electrode, respectively, and a second switch contact of a second diode, said second diode being the extremely negative negative output conversion circuit, the second switch the other end of the tube to zero a negative output terminal of the conversion circuit; the energy storage branch, comprising a first capacitor and a second capacitor connected in series one end of the end of the first capacitor and a second capacitor connected to the same node, and the node connected to the output terminal and the zero-zero AC line, the other end of said first capacitor and said positive an output terminal is connected; connected to the other end of the second capacitor and the negative output terminal.
  2. 2.根据权利要求I所述的不间断电源电路,其特征在于,所述选择开关为继电器。 2. The uninterruptible power supply circuit as claimed in claim I, wherein said selection switch is a relay.
  3. 3.根据权利要求I或2所述的不间断电源电路,其特征在于,所述第一整流器和第二整流器同为二极管,或所述第一整流器和第二整流器同为晶闸管。 According to claim I or uninterruptible power supply circuit of claim 2, wherein said first and second rectifiers with a diode, or the first and second rectifiers with thyristor.
  4. 4.根据权利要求I或2所述的不间断电源电路,其特征在于,所述第一开关管和第二开关管同为场效应管,或所述第一开关管和第二开关管同为绝缘栅晶体管。 According to claim I or uninterruptible power supply circuit of claim 2, wherein the first switch and the second switch is a FET with the tube, or the first switch and the second switch with an insulated gate transistor.
  5. 5.根据权利要求I所述的不间断电源电路,其特征在于,当所述交流电输入为三相交流电时,所述不间断电源电路还包括:第二整流电路、第三整流电路、第二选择开关和第三选择开关;所述第二整流电路,包括串联的第三整流器和第四整流器,所述第三整流器的负极为所述第二整流电路的第三输出端,所述第四整流器的正极为所述第二整流电路的第四输出端,所述第三整流器的正极和所述第四整流器的负极相连于同一节点且所述节点为所述第二整流电路的输入端;所述第三整流电路,包括串联的第五整流器和第六整流器,所述第五整流器的负极为所述第三整流电路的第五输出端,所述第六整流器的正极为所述第三整流电路的第六输出端,所述第五整流器的正极和所述第六整流器的负极相连与同一节点且所述节点为所述第三整流电路的输入端;所述 The uninterruptible power supply circuit of claim I, wherein, when the AC input is a three-phase AC, the uninterruptible power supply circuit further comprises: a second rectifier circuit, the third rectifier circuit, a second and the third selection switch selection switch; the second rectifier circuit, comprising a series of a third rectifier and a fourth rectifier, the third rectifier is extremely negative third output terminal of said second rectifier circuit, the fourth the positive electrode is a fourth rectifier output of the second rectifier circuit, the positive electrode and the negative electrode of the third rectifier is connected to the fourth rectifier in the same node and the input node of the second rectifier circuit; the third rectifier circuit, the rectifier includes a series of fifth and sixth rectifier, a negative fifth rectifier the output terminal of the fifth extremely third rectifying circuit, the positive electrode is of the sixth rectifier third a sixth output terminal of the rectifier circuit, the positive electrode and the negative electrode of said fifth rectifier connected to the same rectifier sixth node and said input node of said third rectifying circuit; the 二选择开关择一地将所述三相交流电中的另一相交流电输入或所述电池输入接入所述第二整流电路的输入端;所述第三选择开关择一地将所述三相交流电中的再一相交流电输入或所述电池输入接入所述第三整流电路的输入端。 Alternatively two selection switch to another input terminal of the three-phase AC input phase AC power or the battery input access the second rectifier circuit; and the third selection switch alternatively to the three-phase in a further phase AC input terminal or said AC input cell to access the third rectifier circuit.
  6. 6.根据权利要求5所述的不间断电源电路,其特征在于,所述第三输出端和所述第五输出端与所述第一电感的一端相连,所述第一电感的一端为所述第一电感与所述整流电路的第一输出端相连的一端;所述第四输出端和所述第六输出端与所述第二电感的一端相连,所述第二电感的一端为所述第二电感与所述整流电路的第二输出端相连的一端。 The uninterruptible power supply circuit as claimed in claim 5, wherein one end connected to the third output terminal and said fifth output terminal and the first inductor, the inductance of the first end a first output terminal connected to one end of said first inductor and the rectifier circuit; said fourth output terminal and the sixth output terminal and an end of said second inductor is connected to the second end of the inductor is said second end of the second inductor and the output terminal of the rectifier circuit is connected.
  7. 7.根据权利要求6所述的不间断电源电路,其特征在于,所述第一整流器、第二整流器、第三整流器、第四整流器、第五整流器和第六整流器为晶闸管。 7. The uninterruptible power supply circuit according to claim 6, wherein said first rectifier, the second rectifier, the third rectifier, the rectifier fourth, fifth and sixth rectifier is a thyristor rectifier.
  8. 8.根据权利要求5所述的不间断电源电路,其特征在于,所述不间断电源电路还包括第二正向变换电路、第二负向变换电路、第三正向变换电路和第三负向变换电路、第七二极管、第八二极管和第九二极管;所述第二正向变换电路,包括第三电感、第三二极管和第三开关管,所述第三电感的一端接所述第二整流电路的第三输出端,所述第三电感的另一端分别与第三二极管的正极和第三开关管的一端相接,所述第三二极管的负极为所述第二正向变换电路的正输出端,所述第三开关管的另一端为所述第二正向变换电路的零输出端;所述第二负向变换电路,包括第四电感、第四二极管和第四开关管,所述第四电感的一端接所述第二整流电路的第四输出端,所述第四电感的另一端分别与第四二极管的负极和第四开关管的一端相接,所述第四二极管的正极为所 8. The uninterruptible power supply circuit according to claim 5, characterized in that the uninterruptible power supply circuit further includes a second forward conversion circuit, the second negative conversion circuit, a third forward conversion circuit and the third negative to the conversion circuit, the seventh diode, and the eighth diode ninth diode; a second forward conversion circuit comprising a third inductor, a third diode and a third switch transistor, the second a third output end of the three second rectification circuit inductor, the third inductor and the other end of the third respectively one end of the positive electrode and the third switch contact diode, the third diode said second tube is extremely negative positive positive output conversion circuit, the third switch and the other end to the second output terminal of the positive zero conversion circuit; a second negative conversion circuit, comprising the fourth output of the fourth inductor, the fourth diode and a fourth switching transistor, one end of the fourth inductor is the second rectifier circuit, the other end of the fourth inductor and fourth diode, respectively, One end of the negative electrode and the fourth switch tube in contact, the positive pole of the fourth diode 第二负向变换电路的负输出端,所述第四开关管的另一端为所述第二负向变换电路的零输出端;所述第三正向变换电路,包括第五电感、第五二极管和第五开关管,所述第五电感的一端接所述第三整流电路的第五输出端,所述第五电感的另一端分别与第五二极管的正极和第五开关管的一端相接,所述第五二极管的负极为所述第三正向变换电路的正输出端,所述第五开关管的另一端为所述第三正向变换电路的零输出端;所述第三负向变换电路,包括第六电感、第六二极管和第六开关管,所述第六电感的一端接所述第三整流电路的第六输出端,所述第六电感的另一端分别与第六二极管的负极和第六开关管的一端相接,所述第六二极管的正极为所述第三负向变换电路的负输出端,所述第六开关管的另一端为所述第三负向变换电路的零输出端;所述第七 The other end of the negative output terminal of the second negative conversion circuit, said fourth switch to the second conversion circuit negative zero output; forward transform of said third circuit comprising a fifth inductance, fifth a fifth output end of the diode and the fifth switching transistor, said fifth inductor third rectifier circuit, the other end of the fifth inductor and the fifth diode cathode, respectively, and the fifth switch end of the tube in contact, the fifth diode is extremely negative positive output terminal of the third forward conversion circuit, the fifth switch and the other end of the third tube is a zero forward transform circuit output end; the third negative conversion circuit comprises a sixth inductor, and a sixth switch transistor a sixth diode, the sixth output terminal of said one end of said sixth inductor third rectifier circuit, a second the other end of the inductor, respectively six and one end of the negative electrode of the sixth switch contact of a sixth diode, said third negative to positive pole conversion circuit negative output terminal of the sixth diode, the second the other end of the six third switch for zero negative output terminal of the conversion circuit; said seventh 极管将所述整流电路的第二输出端与所述电池的负极相连;所述第八二极管将所述第二整流电路的第四输出端与所述电池的负极相连;所述第九二极管将所述第三整流电路的第六输出端与所述电池的负极相连。 A second diode cathode is connected to the output terminal of said rectifier circuit of said battery; said eighth diode is connected to the negative output terminal of said fourth rectifying circuit and the second battery; the first the sixth diode nine output of the third rectifier circuit is connected to the negative electrode of the battery.
  9. 9.根据权利要求8所述的不间断电源电路,其特征在于,所述第一整流器、第二整流器、第三整流器、第四整流器、第五整流器和第六整流器同为二极管,或所述第一整流器、第二整流器、第三整流器、第四整流器、第五整流器和第六整流器同为晶闸管。 9. The uninterruptible power supply circuit according to claim 8, wherein said first rectifier, the second rectifier, the third rectifier, the rectifier fourth, fifth and sixth rectifier diode rectifier is the same, or the The first rectifier, a second rectifier, rectifier third, fourth rectifier, fifth and sixth rectifier with thyristor rectifier.
  10. 10.根据权利要求6至9任一所述的不间断电源电路,其特征在于,所述选择开关、所述第二选择开关和所述第三选择开关,同时将所述三相交流电中的各相分别接入所述整流电路、所述第二整流电路和所述第三整流电路的输入端,或同时将所述电池输入接入所述整流电路、所述第二整流电路和所述第三整流电路的输入端。 10. The uninterruptible power supply circuit 6-9 according to any one of the preceding claims, wherein said selection switch, selecting the second switch and the third selection switch, while in the three-phase AC the phases respectively connected to the rectifier circuit, a second input terminal of the rectifying circuit and the third rectifier circuit, or the battery input simultaneously access the rectifier circuit, the rectifier circuit and the second input of the third rectifier circuit.
  11. 11.根据权利要求10所述的不间断电源电路,其特征在于,所述选择开关、所述第二选择开关和所述第三选择开关均为继电器。 11. The uninterruptible power supply circuit according to claim 10, wherein said selection switch, selecting the second switch and the third selector switch are relay.
  12. 12.根据权利要求6至9任一所述的不间断电源电路,其特征在于,所述第一开关管、第二开关管、第三开关管、第四开关管、第五开关管和第六开关管同为场效应管,或所述第一开关管、第二开关管、第三开关管、第四开关管、第五开关管和第六开关管同为绝缘栅晶体管。 12. The uninterruptible power supply circuit 6-9 according to any one of the preceding claims, wherein said first switch, second switch, third switch, fourth switch, the fifth switch and six FET switch is the same, or the first switch, second switch, third switch, fourth switch, the fifth switch and the sixth switch of the same insulated gate transistor.
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CN103545911A (en) * 2013-10-25 2014-01-29 广东易事特电源股份有限公司 Uninterrupted power system capable of conducting double-input intelligent power supply
CN106160184A (en) * 2015-04-09 2016-11-23 艾默生网络能源有限公司 UPS topology circuit
CN106160538A (en) * 2015-04-09 2016-11-23 艾默生网络能源有限公司 Inverter topology and uninterruptible power supply
CN106300630A (en) * 2015-05-20 2017-01-04 上海航天有线电厂有限公司 UPS system with switching overvoltage protection and application method thereof
WO2017024642A1 (en) * 2015-08-13 2017-02-16 厦门科华恒盛股份有限公司 Three-phase rectifier boost circuit and control method therefor, and uninterruptible power supply

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