CN201994844U - Power supply with passive power factor correction network - Google Patents
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- CN201994844U CN201994844U CN2011201022866U CN201120102286U CN201994844U CN 201994844 U CN201994844 U CN 201994844U CN 2011201022866 U CN2011201022866 U CN 2011201022866U CN 201120102286 U CN201120102286 U CN 201120102286U CN 201994844 U CN201994844 U CN 201994844U
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- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
本实用新型公开了一类带无源功率因数校正网络的电源,包括输入滤波电路1、无源功率因数校正网络2、输出变换级3。输出变换级3的交流输出与电源的交流输入共N[NEUTRAL]线,正弦波同步运行,无隔离变压器。无源功率因数校正网络2,接于电源的输入滤波电路1和输出变换级3之间,具有无源因数校正功能和无源升压功能。所述一类带无源功率因数校正网络的电源,简单可靠,效率高,成本低。
The utility model discloses a power supply with a passive power factor correction network, which comprises an input filter circuit 1, a passive power factor correction network 2 and an output conversion stage 3. The AC output of the output conversion stage 3 and the AC input of the power supply share N [NEUTRAL] lines, and the sine wave operates synchronously without an isolation transformer. The passive power factor correction network 2 is connected between the input filter circuit 1 and the output conversion stage 3 of the power supply, and has a passive power factor correction function and a passive boosting function. The above-mentioned one type of power supply with passive power factor correction network is simple, reliable, high in efficiency and low in cost.
Description
技术领域technical field
本实用新型涉及电源技术领域,具体地说是一类带无源功率因数校正网络的电源,它具有无源功率因数校正功能,并允许电源的交流输出与交流输入共N[NEUTRAL]线。The utility model relates to the technical field of power supply, specifically a kind of power supply with a passive power factor correction network, which has a passive power factor correction function and allows the AC output and AC input of the power supply to share N [NEUTRAL] lines.
背景技术Background technique
能效、环保和成本,一直是电源领域的三个技术焦点。当前,为满足功率因数值的要求,各种电源通常都专门设置一级有源功率因数校正电路,用于完成电压提升和功率因数校正,又因为输出与输入不能共N[NEUTRAL]线而需要隔离变压器。这些无疑会降低整机效率,提高整机成本。所以人们始终都在探索上述问题的解决方案。Energy efficiency, environmental protection and cost have always been the three technical focuses in the power supply field. At present, in order to meet the requirements of power factor value, all kinds of power supplies are usually specially equipped with a first-level active power factor correction circuit to complete voltage boost and power factor correction, and because the output and input cannot share N [NEUTRAL] lines, it is necessary isolation transformer. These will undoubtedly reduce the efficiency of the whole machine and increase the cost of the whole machine. So people are always exploring the solutions to the above problems.
实用新型内容Utility model content
本实用新型公开了一类带无源功率因数校正网络的电源,完成无源功率因数校正、自举升压整流或倍压整流功能,并允许电源的交流输出与交流输入共N[NEUTRAL]线,省去隔离变压器。这为保证整机的高效率,低成本,结构简单,小型化,高输入功率因数提供了必要条件。The utility model discloses a power supply with a passive power factor correction network, which completes the functions of passive power factor correction, bootstrap boost rectification or double voltage rectification, and allows the AC output and AC input of the power supply to share N [NEUTRAL] lines , eliminating the need for an isolation transformer. This provides necessary conditions for ensuring high efficiency, low cost, simple structure, miniaturization, and high input power factor of the whole machine.
本实用新型采用如下技术方案解决上述技术问题:The utility model adopts the following technical solutions to solve the above-mentioned technical problems:
电源输入经输入滤波电路1传给无源功率因数校正网络2,将其升压整流,产生带有直流分量的一段单向正弦波电压供给输出变换级3,其中直流分量为电压的升压部分,用以满足输出变换级3输出电压幅值要求,其中一段单向正弦波电压提供了无源功率因数校正功 能,因为在该时间段内,输出变换级3直接从电源输入H【HOT】线、N[NEUTRAL]线吸取脉冲电流。The power input is transmitted to the passive power
所述无源功率因数校正网络2包括整流二极管Dr1、Dr2,Dr1的负极接无源功率因数校正网络2的正输出端,Dr1的正极接二极管Dr2的负极与电源交流输入N[NEUTRAL]线的节点上,Dr2的正极接无源功率因数校正网络2的负输出端。The passive power
所述所述无源功率因数校正网络2还包括上储能网络21和下储能网络21’,上储能网络21的正输出端接所述无源功率因数校正网络2的正输出端,其负输出端接下储能网络21’的正输出端和市电输入的H【HOT】线节点,下储能网络21’的负输出端接所述无源功率因数校正网络2的负输出端。The passive power
上、下储能网络21、21’的电路形式、元件参数完全相同,上、下储能网络21、21’的放电电压是由储能网络的电路结构形式决定的,初始加电经过几个过度周期之后,其放电电压可以为电源输入正弦波电压幅值的M分之N,也可以为N分之一,N为整数,M=N+1。The circuit forms and component parameters of the upper and lower
根据所需的升压幅值和电源输入的功率因数值的要求,可选用不同的电路结构形式。以下结合附图加以说明。According to the required boost amplitude and the power factor value of power input, different circuit structures can be selected. Describe below in conjunction with accompanying drawing.
附图说明Description of drawings
图1为本实用新型一类带无源功率因数校正网络的电源框图;Fig. 1 is a block diagram of a power supply with a passive power factor correction network of a class of the utility model;
图2为本实用新型用于无隔离变压器的UPS电源实施例框图。Fig. 2 is a block diagram of an embodiment of the utility model for a UPS power supply without an isolation transformer.
图3为本实用新型用于开关电源实施例框图。Fig. 3 is a block diagram of an embodiment of the utility model for a switching power supply.
附图中,各标号所代表的部件列表如下:In the accompanying drawings, the list of parts represented by each label is as follows:
1为输入滤波电路框图,2为无源功率因数校正网络框图,3为输出变换级框图,4为UPS电源的蓄电池系统框图,21为上储能网络框图,21’为下储能网络框图,21-2,21-2’分别为上、下储能网络的一种实施方案,21-3,21-3’分别为上、下储能网络的另一种实施方案,3-1为UPS电源半桥逆变器框图,3-2为半桥谐振式开关电源输出级框图。1 is the block diagram of the input filter circuit, 2 is the block diagram of the passive power factor correction network, 3 is the block diagram of the output conversion stage, 4 is the battery system block diagram of the UPS power supply, 21 is the upper energy storage network block diagram, 21' is the lower energy storage network block diagram, 21-2, 21-2' are respectively an implementation of the upper and lower energy storage networks, 21-3, 21-3' are respectively another implementation of the upper and lower energy storage networks, and 3-1 is UPS The block diagram of the half-bridge inverter of the power supply, 3-2 is the block diagram of the output stage of the half-bridge resonant switching power supply.
具体实施方式Detailed ways
以下结合附图对本实用新型的原理和特征进行描述,所举实例只用于解释本实用新型,并非用于限定本实用新型的范围。The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.
如图1所示,一类带无源功率因数校正网络的电源框图;As shown in Figure 1, a block diagram of a power supply with a passive power factor correction network;
电源输入经输入滤波电路1传给无源功率因数校正网络2,将其升压整流,产生带有直流分量的一段单向正弦电压,供给输出变换级3,其中包括的直流分量为电压的升压部分,用于满足输出变换级3输出电压幅值要求,其中包括的一段单向正弦波电压,提供了无源功率因数校正功能,因为在该时间段内,输出变换级3直接从电源输入H[HOT]线、N[NEUTRAL]线吸取脉冲电流,这段时间的长短,决定了电源的输入功率因数值。The power input is transmitted to the passive power
当允许电源的输出与输入正弦波电压同步的情况下,输出变换级3的输出可以和电源输入共N[NEUTRAL]线,省去隔离变压器。When the output of the power supply is allowed to be synchronized with the input sine wave voltage, the output of the
图2为本实用新型用于无隔离变压器的UPS电源实施例框图.其特点是,所述UPS电源的输出与电源输入正弦波电压同步,输出变 换级3的输出和电源输入共N[NEUTRAL]线,省去隔离变压器。Fig. 2 is the embodiment block diagram of the UPS power source that is used for the utility model without isolation transformer. Its characteristic is that the output of the UPS power source is synchronous with the power input sine wave voltage, and the output of the
图2中,21-2为上储能网络,21-2’为下储能网络,分别为一级逐流电路,与整流二极管Dr1、Dr2共同完成自举升压整流,自举升压的幅值增量约为电源输入正弦波电压幅值的一半。在理想情况下,假如电源输入正弦波电压幅值为300V,则加给UPS电源半桥逆变器3-1的电压包括150V的直流分量和电压幅值为300V的单向正弦波,足够逆变器3-1的输出电压幅值要求;在纯阻性负载情况下,从0度到180度的时间段,所述半桥逆变器3-1都按正弦波规律直接从电源输入H[HOT]线、N[NEUTRAL]线吸取脉冲电流,因此电源的输入功率因数可以做得很高。In Fig. 2, 21-2 is the upper energy storage network, and 21-2' is the lower energy storage network, which are respectively a first-level flow-by-flow circuit, which together with the rectifier diodes Dr1 and Dr2 complete the bootstrap boost rectification, and the bootstrap boost The amplitude increment is about half of the amplitude of the power input sine wave voltage. In an ideal situation, if the power input sine wave voltage amplitude is 300V, the voltage applied to the half-bridge inverter 3-1 of the UPS power supply includes a DC component of 150V and a unidirectional sine wave with a voltage amplitude of 300V, which is enough to invert The output voltage amplitude requirements of the inverter 3-1; in the case of a pure resistive load, the half-bridge inverter 3-1 is directly input from the power supply H [HOT] line and N [NEUTRAL] line absorb pulse current, so the input power factor of the power supply can be made very high.
图3为本实用新型用于开关电源实施例框图,图3中断开了开关电源输出端与市电输入的N[NEUTRAL]线连线,图2中21-3为上储能网络,21-3’为下储能网络,二者的电路形式和参数完全相同,各包括由2N个储能电容和【2N+1】个二极管组成的N个充电支路、M个放电支路,M=N+1,N为整数。Fig. 3 is a block diagram of an embodiment of the utility model for a switching power supply. In Fig. 3, the connection between the output end of the switching power supply and the N [NEUTRAL] line of the mains input is disconnected. In Fig. 2, 21-3 is the upper energy storage network, and 21 -3' is the lower energy storage network, the circuit forms and parameters of the two are exactly the same, each including N charging branches and M discharging branches composed of 2N energy storage capacitors and [2N+1] diodes, M =N+1, N is an integer.
其中,储能电容C1的正极、C3的正极,——,[C2N-1]的正极、二极管D[2N+1]的负极与上储能网络21-3的正输出极相连,储能电容C2的负极、C4的负极,——,C[2N]的负极、二极管D1的正极与上储能网络21-2的负输出极相连;二极管D1的负极接二极管D2的正极与储能电容C1的负极节点,二极管D2的负极接二极管D3的正极与储能电容C2的正极节点,二极管D3的负极接二极管D4的正极与储能电容C3的负极节点,二极管D4的负极接二极管D5的正极与 储能电容C4的正极节点,——,二极管D[2N-1]的负极接二极管D2N的正极与储能电容C[2N-1]的负极节点,二极管D2N的负极接二极管D[2N+1]的正极与储能电容C2N的正极节点。Wherein, the positive pole of the energy storage capacitor C1, the positive pole of C3, ——, the positive pole of [C2N-1], the negative pole of the diode D[2N+1] are connected to the positive output pole of the upper energy storage network 21-3, and the energy storage capacitor The negative pole of C2, the negative pole of C4, ——, the negative pole of C[2N], the positive pole of diode D1 are connected to the negative output pole of the upper energy storage network 21-2; the negative pole of diode D1 is connected to the positive pole of diode D2 and the energy storage capacitor C1 The cathode node of the diode D2, the cathode of the diode D2 is connected to the anode of the diode D3 and the anode node of the energy storage capacitor C2, the cathode of the diode D3 is connected to the anode of the diode D4 and the cathode node of the energy storage capacitor C3, the cathode of the diode D4 is connected to the anode of the diode D5 and The anode node of the energy storage capacitor C4, --, the cathode of the diode D[2N-1] is connected to the anode of the diode D2N and the cathode node of the energy storage capacitor C[2N-1], and the cathode of the diode D2N is connected to the diode D[2N+1] ] and the positive node of the energy storage capacitor C2N.
初始加电经过几个过度周期之后,所述储能网络的放电电压与输入正弦波电压幅值之比约为N∶M,M=N+1,N为整数。比如,N=3,M=4,所述上、下储能网络的放电电压各约为输入正弦波电压幅值的0.75倍,所以加给半桥谐振式开关电源输出级3-2的电压,其直流分量约为1.5倍的输入正弦波的幅值电压。其交流分量幅值约为0.25倍的输入正弦波电压幅值,对应输入电压正弦波约为48.6度到131.4度,亦即在输入电压正弦波的48.6度到131.4度时间段内,半桥谐振式开关电源输出级3-2直接从电源输入线吸取脉冲电流,因此电源的输入功率因数可以做得很高。After several transitional cycles after initial power-on, the ratio of the discharge voltage of the energy storage network to the amplitude of the input sine wave voltage is approximately N:M, where M=N+1, where N is an integer. For example, N=3, M=4, the discharge voltages of the upper and lower energy storage networks are each about 0.75 times the amplitude of the input sine wave voltage, so the voltage added to the output stage 3-2 of the half-bridge resonant switching power supply , whose DC component is about 1.5 times the amplitude voltage of the input sine wave. The amplitude of the AC component is about 0.25 times the amplitude of the input sine wave voltage, corresponding to the input voltage sine wave is about 48.6 degrees to 131.4 degrees, that is, within the period of 48.6 degrees to 131.4 degrees of the input voltage sine wave, the half-bridge resonance The output stage 3-2 of the type switching power supply directly draws the pulse current from the power supply input line, so the input power factor of the power supply can be made very high.
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN102522883A (en) * | 2011-12-20 | 2012-06-27 | 成都成电硅海科技股份有限公司 | Passive power factor correction circuit |
CN103312142A (en) * | 2012-03-09 | 2013-09-18 | 北京加维通讯电子技术有限公司 | AC power supply device |
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CN102522883A (en) * | 2011-12-20 | 2012-06-27 | 成都成电硅海科技股份有限公司 | Passive power factor correction circuit |
CN103312142A (en) * | 2012-03-09 | 2013-09-18 | 北京加维通讯电子技术有限公司 | AC power supply device |
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