CN100563080C - Method and apparatus for controlling and switching main and backup power - Google Patents

Method and apparatus for controlling and switching main and backup power Download PDF

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Publication number
CN100563080C
CN100563080C CN 200710165110 CN200710165110A CN100563080C CN 100563080 C CN100563080 C CN 100563080C CN 200710165110 CN200710165110 CN 200710165110 CN 200710165110 A CN200710165110 A CN 200710165110A CN 100563080 C CN100563080 C CN 100563080C
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voltage
module
point
power
path
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CN 200710165110
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CN101202468A (en
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李华福
陈继高
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成都市华为赛门铁克科技有限公司
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over

Abstract

本发明实施例公开了一种主备电源切换控制的装置,该装置包括主路功率开关模块、过欠压检测模块、备路缓启模块和备路控制模块。 Example discloses a device for controlling the main power switch, the apparatus comprising a main module power switch path, over voltage detection module, and a backup path standby channel module slow start control module of the present invention. 本发明实施例还公开了一种主备电源切换控制的方法。 Embodiments of the present invention also discloses a method of controlling the main power switch. 本发明实施例的方案使主备电源的切换控制更加完善。 Solutions of the embodiments of the present invention that the power control standby switch more perfect.

Description

主备电源切换控制的方法及装置 Method and apparatus for controlling standby power switch

技术领域 FIELD

本发明涉及电源技术,尤其涉及一种主备电源切换控制的方法及装置。 The present invention relates to a power supply technology, particularly to a method and an apparatus for controlling standby power switch. 背景技术 Background technique

在进行电子设备或电子电路设计时,为了提高设备或系统运行的可靠 An electronic circuit or electronic device when designing the device or system in order to improve operation reliability

性,常常需要对应主电源设置备份电源;在设置备份电源的实现方案中,主备电源切换控制是最关键的技术环节之一。 Resistance, often require a backup power supply is provided corresponding to the main power supply; implementations provided in the backup power supply, the main power switch of the control is one of the key technology areas.

参见图1,为现有技术中主备电源切换控制装置的结构示意图。 Referring to Figure 1, a schematic view of the structure of the control device is switched to the prior art standby power supply. 该装置包括主路功率开关模块、欠压检测模块、备路緩启模块和备路控制模块。 The apparatus includes a main power path switch module, voltage detection module, and a backup path standby channel module slow start control module.

所述欠压检测模块,用于对输入该装置的主电源电压进行欠压检测,检测出电压高于欠压点时输出高于欠压的指示信号;检测出电压低于电压点时输出欠压的指示信号。 The brown-out detection means for detecting an input undervoltage of the mains voltage means outputs a signal indicating when a voltage higher than the under-voltage greater than the undervoltage point detected; inverter output voltage when the detection voltage is lower than the pressure instruction signal. 所述欠压检测模块釆用高成本的专用芯片实现。 The brown-out detection module preclude costly ASIC implemented.

所述主路功率开关模块,接收到由所述欠压检测模块传送的高于欠压的指示信号时,提供主电源给负载;接收到由所述过欠压检测模块传送的欠压的指示信号时,切断提供给负载的主电源。 The main power path switching module, upon receiving an indication signal is greater than the undervoltage transmitted by the brown-out detection module, main power to a load; indication received by the transmission-voltage over-voltage detection module signal, cutting off the main power supply to a load. 所述主路功率开关模块采用二极管实现。 The main module power switch path realized by a diode.

所述备路緩启模块,用于实现在该装置接入系统时緩慢将备份电源传送给备路控制模块。 The slow start standby path module configured to implement access system when the device was slowly transferred to the standby power backup path control module. 所述备路緩启模块采用分离元件以及高成本的专用芯片实现。 The slow start standby path module using discrete components and costly dedicated chip. 所述系统为完成对负载进行供电的母板。 The system is a complete master of the power load.

所述备路控制模块,接收到由所述欠压检测模块传送的高于欠压的指示信号时,切断提供给负载的由备路缓启模块传送的备份电源;接收到由所述过欠压检测模块传送的欠压的指示信号时,提供备路緩启模块传送的备份电源给负载。 The standby channel control module, upon receiving an indication signal is greater than the undervoltage transmitted by the brown-out detection module, the backup power supply to the load cut off by the standby path module transmits the slow start; received by the over-under when undervoltage voltage detection module transmits an instruction signal, to provide backup power backup path module transmits the slow start to the load.

目前,在图1所示主备电源切换控制的装置的电路实现方案中,通常采用图2所示的电路。 Currently, in the circuit arrangement shown in FIG. 1 main power switching control implementations, usually the circuit shown in FIG. 图1中的主路功率开关模块通过图2中的二极管Dl实现,主电源和备份电源通过二极管Dl合路后为负载提供通电,在主电源输入高于欠压点的情况下,为负载提供供电的是通过二极管Dl合路后的主电源。 FIG main power switching module implemented by way of the diode Dl in FIG. 2, after the main and backup power supply through the diode Dl combiner provides power to the load, in the case of mains input point above the undervoltage, a load with to mains supply is through the diode Dl combiner. 图1中的备路緩启模块通过图2中的MOS开关Ql、热插拔芯片LT1422 U2、 R7、 Rl、 C2和Cl实现,通过热插拔芯片LT1422 U2、 R7、 Rl、 C2 和C1,控制MOS开关Ql缓慢开启,将输入MOS开关Ql的备份电源传送给PMOS管Q2。 FIG 1 Preparation passage slow start module in FIG. 2 MOS switch Ql,, hot plug chip LT1422 U2, R7, Rl, C2 and Cl achieved by hot-swap chip LT1422 U2, R7, Rl, C2 and C1, control MOS switch Ql is turned on slowly, the MOS input switch Ql backup power transmitted to the PMOS transistor Q2. 图1中的欠压检测模块通过图2中的电压监控芯片MC33161 U2、 R5和R6实现,用于对主电源电压进行欠压4全测,当主电源电压j氐于欠压点时,电压监控芯片MC33161 U2输出低电压,控制PMOS管Q2导通, 将备份电源提供给负载。 When the voltage monitor 2 in FIG chip MC33161 U2, R5 and R6 are achieved, the main power supply voltage for the whole test undervoltage 4, when the main power supply voltage to the undervoltage Di point j in FIG. 1 undervoltage detection module, the voltage monitoring chip MC33161 U2 outputs a low voltage, control the PMOS transistor Q2 is turned on, the backup power supplied to the load. 图1中的备路控制模块通过图2中的Q2、 R2、 R3 和D2实现。 FIG standby path control module 1 in FIG. 2 Q2, R2, R3 and D2 achieved. 现有的主备电源切换控制的方案存在如下缺点: Following disadvantages existing main power switching control scheme:

现有技术只是通过欠压检测模块对主电源进行欠压检测,使主电源低于欠压点时可以从主电源切换到备份电源,但是在主电源电压过高时没有相应的保护措施,由此造成主备电源切换控制的装置和供电负载损坏。 Just prior art by undervoltage detection module detecting undervoltage on the mains supply, the main power supply from the main power supply can be switched to the backup power supply is below the undervoltage point, but not too high in the corresponding protection mains voltage by this causes the main power switch of the load device and the power supply control damage. 从而,使主备电源的切换控制不完善,不能保证安全地对负载进行供电。 Thereby, the standby switching imperfect power control, can not be guaranteed to supply power to the load safely.

可见,现有的主备电源切换控制的方案具有不完善的缺点。 Be seen, the main power switch of the conventional control scheme has disadvantages imperfect.

发明内容 SUMMARY

本发明实施例提供一种主备电源切换控制的装置,该装置能够使主备电源的切换控制更加完善。 Embodiment of the present invention provides a standby power control device switches the switching device enables the standby power control more perfect.

本发明实施例提供一种主备电源切换控制的方法,该方法能够使主备电源的切换控制更加完善。 Embodiment of the present invention provides a standby power switching control method, the method enables the switching power standby control is more complete.

一种主备电源切换控制的装置,该装置包括主路功率开关模块、过欠压检测模块、备路緩启模块和备路控制模块; A master-standby switching power supply control apparatus, the apparatus comprising a main module power switch path, over voltage detection module, and a backup path standby channel module slow start control module;

所述过欠压检测模块,用于对输入该装置的主电源电压进行过欠压检测, 检测出电压正常时输出电压正常的指示信号;检测出电压过压或欠压时输出电压异常的指示信号;所述主路功率开关模块,接收到由所述过欠压检测模块传送的电压正常的 The over voltage detection means for the input of the device over-voltage mains voltage for detection, detects a voltage output signal indicative of the normal voltage is normal; when the detected voltage is an overvoltage or undervoltage output voltage indicative of an abnormality signal; said main power path switch module receives the voltage generated by said undervoltage detection module transmits normal

指示信号,提供主电源给负载;接收到由所述过欠压检测模块传送的电压异常的指示信号,切断提供给负载的主电源; Instruction signal, main power to a load; receiving the voltage generated by said undervoltage detection module transmits a signal indicating an abnormality, cut off the main power supply to a load;

所述备路控制模块,接收到由所述过欠压检测模块传送的电压异常的指示信号,提供备份电源给负载;接收到由所述过欠压检测模块传送的电压正常的指示信号,切断提供给负载的备份电源。 The standby channel control module receiving a signal indicative of the abnormal voltage is detected by the over-voltage transmission module, to provide backup power to the load; normal voltage received by the instruction signal transmitted over voltage detection module, cut providing backup power to the load.

一种主备电源切换控制的方法,该方法包括: A master-standby switching control method of the power supply, the method comprising:

对主电源电压进行过欠压才企测,检测出电压正常时输出电压正常的指示信号,控制主路功率开关将主电源提供给负载; Mains supply voltage is only half over-voltage detected, detects a voltage output signal indicative of the normal normal voltage, control of the main power path switch main power to a load;

检测出主电源电压过压或欠压时输出电压异常的指示信号,控制备路功率开关将备份电源提供给负载。 Mains voltage detected by the output voltage abnormality indicating signal when an overvoltage or undervoltage, prepare control path backup power switching power supply to a load.

从上述方案可以看出,本发明实施例不仅对主电源进行欠压检测,还对主电源进行过压检测,当主电源低于欠压点或高于过压点时,都从主电源切换到备份电源。 As can be seen from the above embodiment, embodiments of the present invention is not only the main power supply undervoltage detection, but also of main power overvoltage detection, when the main power is below the undervoltage points or greater than the overvoltage, the switching from the main power supply to all backup power supply. 从而,使主备电源的切换控制更加完善,更加有效地对负载进行正常供电。 Thereby, the standby switching control power better and more efficiently to the normal power supply load.

附图说明 BRIEF DESCRIPTION

图1为现有技术中主备电源切换控制的装置结构示意图; Figure 1 is a prior art schematic diagram of apparatus standby power control switching configuration;

图2为现有技术中主备电源切换控制的装置的电路示意图; FIG 2 is a prior art schematic circuit diagram of apparatus standby power control switch;

图3为本发明实施例主备电源切换控制的装置结构示意图; Example 3 FIG main power schematic configuration of the control apparatus of the present invention, the switching;

图4为本发明实施例主备电源切换控制的装置的电路示意图; FIG 4 is a schematic circuit arrangement of the main power switch control embodiment of the embodiment of the present invention;

图5为图4中过欠压检测模块120和主路功率开关模块110的电路示意 4 undervoltage detection module 120 in FIG. 5 is a main road and a power switching module 110 is a schematic circuit

图; Figure;

图6为图4中迟滞控制模块150的电路示意图; 图7为图4中备路緩启模块140的电路示意图; 图8为图4中备路控制模块130的电路示意图; 图9为图4中主路异常显示模块160的电路示意图。 FIG 6 is a schematic circuit diagram of FIG. 4 hysteretic control module 150; FIG. 7 is a circuit schematic diagram of the slow start module 140 in FIG. 4 standby channel; FIG. 8 is a circuit diagram Preparation passage 4 the control module 130; FIG. 9 is 4 schematic circuit diagram of the main path abnormality display module 160. 具体实施方式 Detailed ways

为使本发明的目的、技术方案和优点更加清楚明白,下面结合实施例和附图,对本发明进一步详细说明。 For purposes of the present invention, technical scheme and advantages clearer, the following Examples and accompanying drawings, the present invention is further described in detail.

参见图3,为本发明实施例主备电源切换控制的装置结构示意图,该装 Referring to Figure 3, a schematic diagram of a configuration example of apparatus main power switch control embodiment of the invention, the apparatus

置包括主路功率开关模块IIO、过欠压检测模块120、备路緩启模块140和备路控制模块130。 Passage means comprises a main power switching module the IIO, over voltage detection module 120, backup path 140, and a slow start module standby channel control module 130.

过欠压检测模块120,用于对输入该装置的主电源电压进行过欠压检测, 检测出电压正常时输出电压正常的指示信号;检测出电压过压或欠压时输出电 Undervoltage detection module 120, the input device for the mains voltage is detected for over-voltage, detects a voltage output signal indicative of the normal voltage is normal; when the output voltage is detected overvoltage or undervoltage

压异常的指示信号。 Pressure abnormality indication signal.

主路功率开关模块110,接收到由过欠压检测模块120传送的电压正常的指示信号时,提供主电源给负载;接收到由过欠压检测模块120传送的电压异常的指示信号时,切断提供给负载的主电源。 When the main road power switching module 110, receives the indication signal transmitted by the over voltage detection module 120 of the normal voltage, main power to the load; over-voltage upon reception by the abnormal voltage detection module 120 transmits an instruction signal to cut off power supplied to the main load.

主路功率开关模块110可以通过二极管实现,也可以通过MOS开关实现。 Main road power switching module 110 may implement a diode, may be realized by the MOS switch. 若采用MOS开关实现,在MOS开关导通为负载提供供电时,由于MOS开关导通时的内阻很小,电压损失小,可降低功耗。 When implemented using MOS switch, when the MOS switch is turned on to provide power to a load, since the MOS switch is turned on when the internal resistance is small, a small voltage loss, power consumption can be reduced.

备路控制模块130,接收到由过欠压检测模块120传送的电压异常的指示信号时,提供由备路緩启模块140传送的备份电源给负载;接收到由过欠压检测模块120传送的电压正常的指示信号时,切断提供给负载的由备路缓启模块140传送的备份电源。 Preparation path control module 130, 120 receives the voltage transmitted by the over-voltage indication signal abnormality detection module, the slow start is provided by the backup path module 140 transmits a backup power supply to the load; received over voltage detected by the transmitting module 120 normal indication signal when the voltage is cut off by the standby power supply backup path slow start module 140 is provided to transfer the load.

备路控制模块130包括备路功率开关控制模块131和备路功率开关模块 Preparation Preparation path control module 130 includes a power switch path and a backup path control module 131 power switching module

132。 132.

备路功率开关控制模块131,用于接收到由过欠压检测模块120传送的电压异常的指示信号时,控制备路功率开关模块132提供由备路緩启模块140传送的备份电源给负载;接收到由过欠压检测模块120传送的电压正常的指示信号时,控制备路功率开关模块132切断提供给负载的由备路緩启模块140传送的备份电源。 Preparation way power switch control module 131, for receiving the overvoltage undervoltage detection module 120 transmits a signal indicating an abnormality, the power path switch control module 132 prepared by the slow start standby path module 140 transmits a backup power supply to the load; upon receiving the signal indicative of normal voltage by the over voltage detection module 120 transmits the control path backup power switching module 132 is provided by cutting the slow start standby path module 140 transmits the backup power supply to the load. 备路功率开关模块132,用于在备路功率开关控制模块131的控制下,提供由备路緩启模块140传送的备份电源给负载,或者,切断提供给负载的由备路緩启模块140传送的备份电源。 Preparation way power switch module 132, under control of the power backup path switch control module 131, the backup power provided by the backup path module 140 transmits the slow start to the load, or by a cutting apparatus is provided to enable the slow path 140 load module backup power transmission.

备路緩启模块140,用于实现在该装置接入系统时緩慢将备份电源传送给备路控制模块130。 Preparation passage slow start module 140, when the device for implementing slow access system to transmit power to the standby backup path control module 130. 备路緩启模块140包括备路緩启功率开关模块142和备路防抖及緩启模块141。 Preparation passage slow start module 140 includes slow start standby power switch path and a backup path stabilization module 142 and module 141 slow start.

备路防抖及緩启模块141,与备路緩启功率开关模块142的输入端和输出端分别相连,在该装置接入系统时,控制备路緩启功率开关模块142防抖动地緩慢将备份电源传送给备路功率开关模块132;备路緩启功率开关模块142,用于在备路防抖及緩启模块141的控制下将备份电源传送给备路功率开关模块132。 Preparation passage stabilization module 141 and the slow start, slow start and the standby channel switching module power input terminal and the output terminal 142 are connected, respectively, when the device access system, a power control standby channel switching module 142 slow start slow debounce the backup power transmitting path to the standby power switching module 132; slow start standby channel power switching module 142, under control of the standby channel stabilization and slow start of the backup power module 141 to the standby transmission path of the power switch module 132.

备路緩启模块140可以与现有技术中的相同,也就是通过热插拔芯片LT1422 U2等实现;也可以通过分离元件来实现,其具体电路可以为图7所示。 Preparation passage slow start module 140 may be identical to the prior art, i.e. hot plug chip LT1422 U2 the like; may be realized by a separating element, which may be a specific circuit 7 shown in FIG. 由于分离元件的成本比热插拔芯片LT1422U2的组件低很多,这样,降低了成本。 Since the cost is much lower than the separating element chip LT1422U2 hot-swappable components, thus, reduces cost.

可选地,本发明实施例的主备电源切换控制的装置进一步包括迟滞控制模块150,用于接收由过欠压检测模块120传送的电压正常的指示信号时,向过欠压检测模块120发送迟滞信号;接收由过欠压检测模块120传送的电压异常的指示信号时,不向过欠压检测模块120发送迟滞信号。 Alternatively, the main power switch means control embodiment of the present invention further comprises a hysteretic control module 150 operable to receive a signal indicative of normal voltage transmitted by the over-voltage detection module 120 is transmitted to the over-voltage detection module 120 hysteresis signal; receiving overvoltage undervoltage detection module 120 transmits a signal indicative of abnormality, not to the over-voltage detection module 120 transmits a hysteresis signal.

相应地,过欠压检测模块120根据接收到的所述迟滞信号,将欠压点从原欠压点降低到欠压检测迟滞切换点;或者,将过压点从原过压点调升到过压4全测迟滞切换点;或者,将欠压点从原欠压点降低到欠压检测迟滞切换点,并将过压点从原过压点调升到过压一企测迟滞切换点; Accordingly, the hysteresis over voltage detection module 120 according to the received signal, from the original point depressants undervoltage undervoltage undervoltage detection point to the switching point hysteresis; or through the pressure point raised from the original tone overvoltage point 4 the whole measurement overpressure hysteresis switch point; or undervoltage point is lowered from the original point to the undervoltage detection hysteresis switching point undervoltage, overvoltage and over voltages from an original point raised their half overpressure measuring a hysteresis switching point ;

过欠压检测模块120没有接收到迟滞控制模块150传送的迟滞信号时,将欠压点设置在原欠压点,将过压点设置在原过压点。 When the over voltage detection module 120 does not receive the control module 150 of the hysteresis Hysteresis transfer, undervoltage set point in the original point of the undervoltage, overvoltage set point in the original overvoltage point.

可选地,本发明实施例的主备电源切换控制的装置包括电路异常显示模块160,用于接收到过欠压检测模块120输出的电压异常的指示信号后,显示为主路异常的状态。 After Alternatively, the main power unit of the present invention, an embodiment of the switching control module 160 includes a circuit abnormality display, for receiving the excess voltage instruction signal output from the undervoltage detecting module 120, the road-based display abnormal state.

可选地,主路功率开关模块110的输出端和备路功率开关模块132的输出端连通,然后,与电路异常显示模块160相连,为电路异常显示模块160提供供电;与迟滞控制模块150相连,为迟滞控制模块150提供供电;与备路功率开关控制模块131相连,为备路功率开关控制模块131提供供电。 Alternatively, the main power path switching module 110 and the output of the power switching module backup path output terminal 132 of the communication, then, with the display module 160 is connected to a circuit abnormality as an abnormality display circuit 160 provides a power module; control module 150 is connected to hysteretic , the hysteresis power control module 150; standby passage connected to the power switching control module 131, to provide a power supply for the backup path switch control module 131.

根据实际设计情况,本发明实施例主备电源切换控制的装置结构的实现方式多种多样,这里,以图4所示的电^^为例对图3所示的结构进行具体说明。 The actual design, the embodiment of the present invention, implementations of embodiments of the main power switching control means a variety of structures, where electrical ^^ shown in an example of the structure of FIG shown in Fig. 3 will be specifically described. 其中,主路功率开关^t块110采用MOS开关实现。 Wherein the main power switch ^ t path block 110 implemented using MOS switches.

参见图4,为本发明实施例主备电源切换控制的装置的电路示意图,图中标出了各个模块的具体实现电路。 Referring to Figure 4, a schematic diagram of the circuit arrangement according to the main power switch control embodiment of the invention, markings of the particular implementation of the circuit of each module.

参见图5,为图4中过欠压检测模块120和主路功率开关模块110的电路示意图。 Referring to Figure 5, a circuit diagram for the over-voltage detection module 4120 in FIG power switching module and the main road 110. 主路功率开关模块为图中所述的M0S开关Q1。 The main road is a power switching module in FIG M0S switch Q1. 过欠压检测模块采用2片TL431 (Ul、 U2)和外围电阻实现,所述外围电阻包括R1、 R2、 R3、 R4、 R5 、 R6和C1。 Undervoltage detection module using two TL431 (Ul, U2) and a peripheral resistance realizing the peripheral comprises a resistor R1, R2, R3, R4, R5, R6, and C1. TL431是具有基准电压的电压比较器,其基准电压Vref为2.5V或1.25V。 TL431 is a voltage comparator reference voltage, which reference voltage Vref is 2.5V or 1.25V. 由Rl、 R2和Ul实现过压斗会测,由R3、 R4和U2 实现欠压检测。 Of Rl, R2 and Ul an overvoltage sensing arm will, by R3, R4 and U2 Undervoltage detection. 过压检测模块的原过压点为:(1+R1/R2) x Vref;欠压检测模块电路的原欠压点为:(1+R3/R4) x Vref。 Overvoltage Overvoltage original point detection module is: (1 + R1 / R2) x Vref; original Brown Brown spot detection module circuit is: (1 + R3 / R4) x Vref.

当主电源输入电压在原欠压点和原过压点之间{(1+R3/R4) x Vref ~ (1+R1/R2) x Vref }时,过欠压检测模块输出Vmoni为低电平电压,MOS开关Ql导通,由主电源为负载提供供电;同时过欠压检测模块输出低电平给迟滞控制模块,此时由迟滞控制模块电路和过欠压检测模块电路实现将欠压点由原欠压点(1+R3/R4) x Vref降低为欠压检测迟滞切换点[l+(R3〃R22)/R4] x Vref ,相应地,过欠压检测模块的正常电压由{ (l+R3/R4) x Vref ~ (l+Rl/R2)xVref》变为([1+(R3〃R22)/R4]x Vref〜(1+R1/R2) x Vref },其中,R22为迟滞控制电路模块中电阻,参见图6。 When the voltage between the mains input-voltage point and the original point of the original overvoltage {(1 + R3 / R4) x Vref ~ (1 + R1 / R2) x Vref}, the over-voltage detection module outputs a low level voltage Vmoni , the MOS switch Ql is turned on, the main power supply to a load; simultaneous over-voltage hysteresis to the detection module outputs a low level control module, at this time point by the undervoltage implemented by a hysteresis control circuit and over-voltage module circuit detection module undervoltage original point (1 + R3 / R4) x Vref undervoltage detector is reduced hysteresis switching point [l + (R3〃R22) / R4] x Vref, respectively, over voltage detection module by the normal voltage {(l + R3 / R4) x Vref ~ (l + Rl / R2) xVref "becomes ([1+ (R3〃R22) / R4] x Vref~ (1 + R1 / R2) x Vref}, where, R22 is a hysteretic control resistor circuit module, see Fig.

此后,当主电源输入电压异常,即低于[1+(R3〃R22)/R4]x Vref或高于(1+R1/R2) x Vref时,过欠压检测输出Vmoni为高电平电压,即VOUT为高电平,M0S开关Q1截止,断开主电源为负载提供的供电回路,同时,过欠压检测模块的正常电压范围返回到{ (l+R3/R4) x Vref ~ (1+R1/R2) x Vref},过欠压检测模块再以该返回后的正常电压范围进行过欠压4佥测。 Thereafter, when the mains input voltage is abnormal, i.e., less than [1+ (R3〃R22) / R4] x Vref or greater than (1 + R1 / R2) x Vref, over voltage detection output Vmoni high level voltage, i.e., VOUT is high, M0S switch Q1 is turned off to disconnect the main power supply circuit of the load, while the over-voltage detection module is returned to the normal voltage range {(l + R3 / R4) x Vref ~ (1+ R1 / R2) x Vref}, over voltage detection module after the normal voltage range and then to return the over-voltage for measurement Qian 4. 直到才企测到电压正常时,重复上述过程。 Until only half the normal voltage is detected, the process is repeated.

图5中,电容C1为防抖动电容,用以保证在主电源电压瞬变时输出不发生变化。 5, as capacitor C1 debounce capacitors to ensure that the output voltage transients when the main power is not changed.

参见图6,为图4中迟滞控制模块150的电路示意图,其工作过程参见关于图5的描述。 Referring to Figure 6, a schematic diagram of a circuit module 150 of FIG. 4 in the hysteresis control, the working process described with respect to Referring to FIG. 5. 当主电源异常时(即低于欠压检测点[1+(R3〃R22)/R4] x Vref 或高于过压检测点(1+Rl/R2)x Vref),过欠压检测模块输出Vmoni为高电压(参见图4) , MOS管Q6导通,二极管D2截止,迟滞控制模块对过欠压检测电路模块无信号输出;当主电源正常时,过欠压检测输出Vmoni为低电压(参见图4) , MOS管Q6截止,二极管D2导通,可见,欠压点的确定由迟滞控制模块中的R22,和过欠压检测模块中的R3、 R4组成的电阻网络计算确定。 When the main power supply abnormality (i.e., below the undervoltage detection point [1+ (R3〃R22) / R4] x Vref or higher than the overvoltage detection point (1 + Rl / R2) x Vref), over voltage detection module outputs Vmoni a high voltage (see FIG. 4), MOS transistor Q6 is turned on, the diode D2 is turned off, no hysteresis control signal output module of the over voltage detection circuit module; when the main power supply is normal, over-voltage is a low voltage detection output Vmoni (see FIG. 4), MOS transistor Q6 is turned off, the diode D2 turns on, visible, undervoltage point is determined by the hysteresis control module R22, and over-voltage detection module R3, R4 resistor network composed calculated and determined.

图6所示的迟滞控制模块电路能够防止主电源在欠压点连续波动时,因主备电源反复切换而导致主备电源切换控制装置的损坏。 Hysteresis control circuit module shown in Figure 6 can be prevented when the main power fluctuations continuously undervoltage point, because repeated switching main power causes the main power switch of the damage to the control apparatus.

当然,迟滞控制模块还可以实现防止主电源在过压点连续波动时,因主备电源反复切换而导致主备电源切换控制装置的损坏;或者,迟滞控制模块还可以实现防止主电源在过压点和欠压点连续波动时,因主备电源反复切换而导致主备电源切换控制装置的损坏。 Of course, the hysteresis control module may also be implemented to prevent the main power continuously fluctuates overvoltage point, because of main power to repeatedly switch caused by damage to the main power switch of the control means; or hysteretic control module may also be implemented to prevent the main power supply overvoltage continuous fluctuation point and undervoltage point, because repeated switching main power causes the main power switch of the damage to the control apparatus. 根据本发明迟滞控制模块的思路,本领域技术人员能够采用多种相应的电路实现,这里不再赘述。 The idea of ​​the present invention, the hysteresis control module, one skilled in the art can be implemented using a variety of corresponding circuit, will not be repeated here.

参见图7,为图4中备路缓启模块140的电路示意图,备路緩启模块中的备路緩启功率开关模块通过图中的MOS开关Q3实现。 Referring to FIG. 7, FIG. 4 is a circuit diagram of module 140 Preparation passage slow start, slow start preparation prepared passage path module Q3 slow start power switching module implemented by a MOS switch in FIG. 在本发明实施例的主备电源切换控制装置插入系统母板时刻,由于电容C2两端电压不突变,PNP 三极管Q2导通,电容C3的电荷通过Q2和R9泄放,功率MOS的栅-源电压VGS低于其阈值电压Vth,功率MOS开关Q3截止,输出电压VSO为0。 Main power switch control apparatus in an embodiment of the present invention is inserted into the system motherboard time, since the voltage across the capacitor C2 not mutated, the PNP transistor Q2 is turned on, capacitor C3 charges through Q2 and R9 bleed, power MOS gate - source voltage VGS is below its threshold voltage Vth, the power MOS switch Q3 is turned off, the output voltage VSO is 0.

插入系统母板正常后,电容C2两端电压充电到备份电源,PNP三极管Q2 After the normal insertion system motherboard, the voltage across the capacitor C2 is charged to a backup power source, the PNP transistor Q2

截止,备份电源通过R10开始对电容C3进行充电,当C3两端电压充电到某一确定电压值[Vgh (th)十Vd]时,M0S开关Q3的栅极达到导通阈值电压Vgh (th) , MOS开关Q3开始导通,这段时间VSO的电压还是为0,这段时间的 Turned off, the capacitor C3 starts the backup power supply is charged through R10, when the voltage across C3 is charged to a voltage value determined [Vgh (th) ten Vd is], the gate of the switch Q3 M0S reaches conduction threshold voltage Vgh (th) , the MOS switch Q3 start conducting, this time or voltage VSO is 0, this period

长短由电阻R10和电容C3共同确定。 Jointly determined by the length of resistor R10 and capacitor C3.

MOS开关Q3导通后,对C3继续充电使MOS开关Q3的栅源达到平台电压(Vplt),这时反々责电容C4、 MOS开关源/漏才及、VSO电压以相同电压变^: After the MOS switch Q3 is turned on, the charging of C3 continues the MOS gate-source voltage of switch Q3 reaches a plateau (VPLT), this time anti 々 responsible capacitor C4, switch MOS source / drain it and, at the same voltage of the voltage VSO ^:

率改变;VSO电压以恒定电压变化速率从0V到备电源的电压值;VSO达到备 Rate of change; VSO rate of change of voltage at a constant voltage value from the voltage 0V to the power supplying; preparation reaches VSO

电源的电压值后,R10对电容C3继续充电,并达到备份电源的电压值,这时 After the power supply voltage, the capacitor continues to charge R10 C3, and backup power supply reaches a voltage value, then

MOS开关Q3的RDS最小,VDS也达到最低值,输出备份电压。 RDS Q3 minimum MOS switch, the VDS is also low, the output voltage of the backup.

反馈电容C4大小由流过它的电流、VSO允许的浪涌电流和VSO上的负载 Load on the size of the feedback capacitor C4 by the current through it, allowing the inrush current and VSO VSO

电容确定。 Capacitance OK. VSO的电压变化速率为输出网络VSO的允许浪涌电流与VSO的负 Allowing the negative surge current and voltage VSO VSO rate of change of the output network of VSO

载电容的比值。 Capacitance ratio of carrier.

参见图8,为图4中备路控制模块130的电路示意图,备路控制模块中的备路功率开关模块为图8中的PMOS开关Q5。 Referring to Figure 8, a schematic diagram of a circuit module 130 is controlled to the standby channel 4, channel control module standby backup path switch is a PMOS power switching module Q5 in FIG. 当主电源异常时(即低于欠压检测点[1 +(R3〃R22)/R4] x Vref或高于过压检测点(1+R1 /R2) x Vref),过欠压检测模块输出Vmoni为高电压(参见图4) , NMOS管Q4导通,PMOS开关Q5导通,由备份电源为负载提供供电;反之,当主电源电压正常时,过欠压检测输出Vmoni为低电压(参见图4),备路功率开关模块PMOS管Q5截止, 断开备份电源为负载提供的供电回路。 When the main power supply abnormality (i.e., below the undervoltage detection point [1 + (R3〃R22) / R4] x Vref or higher than the overvoltage detection point (1 + R1 / R2) x Vref), over voltage detection module outputs Vmoni a high voltage (see FIG. 4), the NMOS transistor Q4 is turned on, the PMOS switch Q5 is turned on, by the backup power supply provides power to the load; the other hand, when the main power supply voltage is normal, over voltage detection output Vmoni a low voltage (see FIG. 4 ), prepared by way power switching module PMOS transistor Q5 is turned off, to disconnect the backup power supply circuit of the load.

参见图9,为图4中主路异常显示模块的电路示意图。 Referring to Figure 9, the main path is a circuit schematic of FIG. 4 abnormality display module. 当主电源异常时(即低于欠压检测点[1 +(R3〃R22)/R4] x Vref或高于过压检测点(1+R1 /R2) x Vref),过欠压检测模块输出Vmoni为高电压(参见图4) , NMOS管Q7导通, 发光二极管LED点亮,通过选择合适的串接限流电阻R26,使发光二极管LED 的工作电流在5 ~ 10mA范围内;反之,当主电源正常时,过欠压才全测模块输出Vmoni为低电压,NMOS管Q7截止,发光二极管LED不点亮。 When the main power supply abnormality (i.e., below the undervoltage detection point [1 + (R3〃R22) / R4] x Vref or higher than the overvoltage detection point (1 + R1 / R2) x Vref), over voltage detection module outputs Vmoni a high voltage (see FIG. 4), NMOS transistor Q7 is turned on, light emitting diode LED is lit, by selecting the appropriate series current limiting resistor R26, the light emitting diode LED operating current in the range of 5 ~ 10mA; the other hand, when the main power normal, over-voltage sensing module output Vmoni before full voltage is low, the NMOS transistor Q7 is turned off, light emitting diode LED is not lit.

当然,采用本发明实施例的思路能实现的主备电源切换控制的装置不仅限于上面所举的电路,这里不——列举。 Of course, the use of standby power of the idea of ​​the embodiment of the present invention enables the apparatus is not limited to the switching control circuit cited above, there is not - exemplified.

本发明实施例不仅公开了主备电源切换控制的装置,还公开了主备电源切」换控制的方法,该方法包4舌: Embodiments of the present invention is not disclosed an apparatus main power switch control method is also disclosed a standby power cut "of the switching control, the method tongue 4:

对主电源电压进行过欠压4全测,检测出电压正常时输出电压正常的指示信 Mains supply voltage is measured over the whole Brown 4, detects a voltage output indicative of normal voltage normal letter

号,控制主路功率开关将主电源提供给负载; Number, path control of the main power switch to supply main power to a load;

检测出主电源电压过压或欠压时输出电压异常的指示信号,控制备路功率开关将备份电源提供给负载。 Mains voltage detected by the output voltage abnormality indicating signal when an overvoltage or undervoltage, prepare control path backup power switching power supply to a load.

所述对主电源电压进行过欠压检测进一步包括: The main power supply voltage for over-voltage detector further comprising:

对主电源电压进行过欠压检测,检测出主电源电压正常时,将欠压点乂人原欠压点降低到欠压检测迟滞切换点,或者,将过压点从原过压点调升到过压检测迟滞切换点,或者,将欠压点从原欠压点降低到欠压检测迟滞切换点,并将过压点从原过压点调升到过压;^测迟滞切换点;将电压正常的指示信号传送给主路功率开关和备路功率开关,.控制主路功率开关将主电源提供给负载,控制备路功率开关切断提供给负载的备份电源; The main power supply voltage detecting over-voltage is detected when the main power supply voltage is normal, reduced-voltage point to point qe human primary Brown Brown detection hysteresis switch point, or the point from primary overvoltage overvoltage point raised the overvoltage detection hysteresis switch point, or the point is lowered from the original Brown Brown Brown detection hysteresis point to the switching point, and the point from the original overpressure overpressure overpressure raised their points; ^ measuring hysteresis switching point; transmitting an instruction signal to the normal voltage of the main power switch path and a backup path power switch, the power switch controls a main road main power to a load, the power switch off the control passage prepared to provide backup power to the load.;

检测出主电源电压过压或欠压时将电压异常的指示信号传送给主路功率开关和备路功率开关,控制主路功率开关切断提供给负载的主电源,控制备路功率开关将备份电源提供给负载;并将欠压点设置在原欠压点,将过压点设置在原过压点。 Mains voltage is detected when the overvoltage or undervoltage voltage abnormality indicating signal is transmitted to the main power switch path and a backup path power switch, the power control switch off the main road to the load of the main power supply, the power switch control path backup power backup supplied to the load; Brown and Brown in the original point is set point, the overvoltage set point in the original overvoltage point.

所述主路功率开关模块可以采用MOS开关。 The main path module power switch MOS switches may be employed.

该方法还可以包括:对主电源正常供电时的状态进行显示。 The method may further comprise: a state of normal power supply when the main power is displayed.

本发明实施例通过过欠压检测模块不仅对主电源进行欠压检测,还对主 Example not only the main power supply is detected by the undervoltage detecting over-voltage module of the present invention, also the main

电源进行过压检测,当主电源异常,即主电源低于欠压点或高于过压点时, When the power supply overvoltage detection, when the main power supply abnormality, i.e., the main power is below the undervoltage points or greater than the overvoltage,

都从主电源切换到备份电源。 Are switched to the backup power supply from the main power supply. 从而,使主备电源的切换控制更加完善,更加 Thereby, the standby power switch control better and more

有效地对负载进行正常供电。 Effectively normal power supply load.

并且,与现有技术相比,本发明实施例主备电源切换控制的方案还具有 And programs, compared with the prior art, for example, main power control switch further embodiment of the present invention having

^口下4尤;^、: Especially a lower opening 4 ^; ^ ,:

1)现有技术中,由于主路功率开关模块采用二极管合路为负载提供供电,由于二极管本身的特性,将导致供电时电压损失大,功耗大。 1) the prior art, since the main power switch path combiner module using a diode providing a supply of a load, since the characteristic of the diode itself, will lead to a large loss of the supply voltage, power consumption. 而本发明实施例中主路功率开关模块采用MOS开关实现时,MOS开关导通将主电源提供给负载,MOS开关导通时的内阻很小,电压损失小,降低了功耗。 In the embodiment of the invention the main road when the power switching module is implemented MOS switch, the MOS switch is turned on to supply main power to the load, the internal resistance of the MOS switch is turned on when the very small voltage loss, reducing power consumption.

2 )由于现有技术的主备电源切换控制的装置的电路的主要器件采用了2 片专用芯片:热插拔芯片LT1422和电压监控芯片MC33161,这导致了成本相对较高。 2) Since the main circuit device of the prior art standby power supply switching control means employs two ASIC: LT1422 chip and voltage monitoring hot-swap chip MC33161, which results in a relatively high cost. 并且,现有技术中主要器件的种类相对较多:除2种专用芯片夕卜, 还有l种功率NMOS管,l种功率PMOS和l种二极管,这也将导致成本上升。 Further, the type of prior art device is relatively large mainly: two kinds of inter ASIC Bu Xi, l kinds of power as well as NMOS transistors, PMOS and l l kinds of power diodes species, this will also result in cost increase. 而本发明实施例主备电源切换控制的电路采用常规、通用器件来实现,其成本主要体现为TL431和MOS开关的成本上,而TL431和MOS开关的成本比专用芯片(热插拔芯片LT1422,电压监控芯片MC33161 )低很多,从而,降低了成本。 The main power circuit example of the switch control embodiment of the present invention using conventional, general purpose device is achieved, which mainly cost and the cost of the MOS switch TL431, TL431 and the cost ratio of the MOS switch ASIC (Hot Plug chip LT1422, voltage monitoring chip MC33161) much lower, thereby reducing the cost.

而且,本发明实施例主备电源切换控制的电路采用的主要功能器件种类较少,器件种类的归一化也会带来成本优势,从而,更进一步地降低了成本。 Furthermore, the main embodiment of the present invention is less functional element type main power switch control circuit embodiment employed, the type of the device will bring the normalized cost advantage, thereby further reducing the cost.

3)针对负载需要的功率、电压的不同,仅需要调整用于实现主路功率开关模块的MOS开关、用于实现备路緩启功率开关模块的MOS开关,以及实现备路功率开关模块的MOS开关,即能满足要求,其使用方便。 3) for the power required by the load, different voltages, only need to be adjusted for realizing the main road MOS switch power switching module for channel MOS switches enable slow start standby power switching module, and a backup path to achieve a MOS power switching module switch, that can meet the requirements, it easy to use.

以上所述的具体实施例,对本发明的目的、技术方案和有益效果进行了进一步详细说明,所应理解的是,以上所述仅为本发明的具体实施例而已, 并不用于限定本发明的保护范围,凡在本发明的精神和原则之内,所做的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。 The above-described specific embodiments of the object, technical solutions, and advantages of the invention will be further described in detail, it should be understood that the above descriptions are merely embodiments of the present invention, but not intended to limit the present invention. the scope of protection, within the spirit and principles of the present invention, any changes made, equivalent substitutions and improvements should be included within the scope of the present invention.

Claims (8)

1、一种主备电源切换控制的装置,其特征在于,该装置包括主路功率开关模块、过欠压检测模块、备路控制模块和迟滞控制模块; 所述过欠压检测模块,用于对输入该装置的主电源电压进行过欠压检测,检测出电压正常时输出电压正常的指示信号;检测出电压过压或欠压时输出电压异常的指示信号; 所述主路功率开关模块,接收到由所述过欠压检测模块传送的电压正常的指示信号,提供主电源给负载;接收到由所述过欠压检测模块传送的电压异常的指示信号,切断提供给负载的主电源; 所述备路控制模块,接收到由所述过欠压检测模块传送的电压异常的指示信号,提供备份电源给负载;接收到由所述过欠压检测模块传送的电压正常的指示信号,切断提供给负载的备份电源; 所述迟滞控制模块,用于当接收到由所述过欠压检测模块传送的电压正 1, a main power switch of the apparatus is controlled, characterized in that the device comprises a main module power switch path, over voltage detection module, control module and a standby path hysteretic control module; the over-voltage detection means for the input voltage of the main power to over-voltage is detected, detects a voltage output signal indicative of the normal voltage is normal; detecting the output voltage of voltage abnormality indicating signal when an overvoltage or undervoltage; the main power path switching module, receiving a signal indicative of normal voltage by the over voltage detection module transmission, main power to a load; receiving the voltage generated by said undervoltage detection module transmits a signal indicating an abnormality, cut off the main power supply to a load; the standby channel control module receiving a signal indicative of the abnormal voltage is detected by the over-voltage transmission module, to provide backup power to the load; normal voltage received by the instruction signal transmitted over voltage detection module, cut providing backup power to a load; the hysteretic control module, when receiving the voltage generated by said undervoltage detection module transmits a positive 的指示信号时,向所述过欠压检测模块发送迟滞信号;以及当接收到由所述过欠压检测模块传送的电压异常的指示信号时,不向所述过欠压检测模块发送迟滞信号; 所述过欠压检测模块根据接收到的所述迟滞信号,对欠压点、过压点,或者欠压点和过压点进行调整。 When the instruction signal, to the over-voltage detection module transmits a hysteresis signal; and when receiving a voltage signal indicative of an abnormality detected by the over-voltage module transmitted signal is not transmitted to the hysteresis undervoltage detection module ; the over voltage detection module according to the received signal hysteresis, undervoltage point, point overvoltage, undervoltage or overvoltage point and adjustment point.
2、 如权利要求l所述的装置,其特征在于,该装置包括备路緩启模块,用于缓慢将备份电源传送给备路控制模块;所述备路緩启模块包括备路緩启功率开关模块和备路防抖及緩启模块;所述备路防抖及缓启模块,用于控制备路緩启功率开关模块防抖动地緩慢将备份电源传送给备路控制模块;所述备路緩启功率开关模块,用于在备路防抖及緩启模块的控制下将备份电源传送给备路控制模块。 2. The apparatus according to claim l, characterized in that the apparatus comprises a slow start standby path module configured to transmit power was slowly backup path to the standby control module; slow start of the standby channel module comprises a power backup path slow start Preparation passage switching means and image stabilization and slow startup module; shake the standby path and slow start means for controlling the slow start standby channel power switching module debounce slow backup power transmitting path to the standby control module; the Preparation passage slow start power switching module, under control of the standby channel stabilization and slow start of the backup power module to the standby transmission path control module.
3、 如权利要求l所述的装置,其特征在于,所述过欠压检测模块进一步用于根据接收到的所述迟滞信号,将欠压点从原欠压点降低到欠压检测迟滞切换点;或者,将过压点从原过压点调升到过压检测迟滞切换点;或者,将欠压点从原欠压点降低到欠压检测迟滞切换点,并将过压点从原过压点调升到过压才企测迟滞切换点;所述过欠压检测模块没有接收到迟滞控制模块传送的迟滞信号时,将欠压点设置在原欠压点,将过压点:没置在原过压点。 3. The apparatus according to claim l, wherein said over-voltage detection module is further configured according to the received signal hysteresis, undervoltage reduced from the original point to point undervoltage undervoltage detection switching hysteresis point; Alternatively, the overpressure point from the original point raised their overvoltage overvoltage detection hysteresis switching point; or undervoltage point reduction from the original point to the undervoltage detection hysteresis undervoltage switch points from the original point and the overpressure overvoltage point you reach the overvoltage switch points only half the hysteresis measurement; detecting when the over-voltage module does not receive module hysteretic control signal transmitted by the hysteresis, the original point is set under voltage point undervoltage, overvoltage points: no overvoltage point in the original set.
4、 如权利要求l所述的装置,其特征在于,所述备路控制模块包括备路功率开关控制模块和备路功率开关模块;所述备路功率开关控制模块,用于接收到由所述过欠压检测模块传送的电压异常的指示信号时,控制所述备路功率开关模块提供备份电源给负载;接收到由所述过欠压检测模块传送的电压正常的指'示信号时,控制所述备路功率开关模块切断提供给负载的^f分电源;所述备路功率开关模块,用于在所述备路功率开关控制模块的控制下,提供备份电源给负载,或者,切断提供给负载的备份电源。 4. The apparatus according to claim l, wherein said apparatus comprises a backup channel path control module power switch control module and the standby power path switch module; the standby power path switch control module is configured to receive a over voltage of said voltage detection module transmits a signal indicating an abnormality when controlling said standby power switch path to provide backup power to the load module; receiving the voltage generated by said undervoltage detection module refers to normal transmission 'signal is shown, the control module of the standby power switch off path provided to the load power fraction ^ f; power switching module of the standby channel, under control of the standby power path switch control module, to provide backup power to the load, or to cut off providing backup power to the load.
5、 如权利要求2所述的装置,其特征在于,所述备路緩启模块通过分离元件实现。 5. The apparatus of claim 2, wherein said slow start standby path separation element module implemented.
6、 如权利要求1所述的装置,其特征在于,所述主路功率开关模块为MOS开关。 6. The apparatus as claimed in claim 1, characterized in that the main path of MOS switch power switching module.
7、 如权利要求l所述的装置,其特征在于,该装置进一步包括电路异常显示模块,用于接收到过欠压检测模块输出的电压异常的指示信号后,显示为主路异常的状态。 7. The apparatus according to claim l, characterized in that the apparatus further includes a circuit abnormality display means for receiving the excess voltage indication signal output undervoltage detection module, the abnormal state display main road.
8、 一种主备电源切换控制的方法,其特征在于,该方法包括:对主电源电压进行过欠压检测,检测出电压正常时输出电压正常的指示信号,控制主路功率开关将主电源提供给负载;;险测出主电源电压过压或欠压时输出电压异常的指示信号,控制备路功率开关将^f分电源提供给负载;所述对主电源电压进行过欠压检测进一步包括:对主电源电压进行过欠压斥全测,4企测出主电源电压正常时,将欠压点从原欠压点降低到欠压检测迟滞切换点,或者,将过压点从原过压点调升到过压检测迟滞切换点,或者,将欠压点从原欠压点降低到欠压检测迟滞切换点,并将过压点从原过压点调升到过压检测迟滞切换点;将电压正常的指示信号传送给主路功率开关和备路功率开关,控制主路功率开关将主电源提供给负载,控制备路功率开关切断提供给负载的^P分电源 8, the power supply switching method of a master-device control, characterized in that, the method comprising: a main power supply voltage for over-voltage is detected, the output voltage is normal when the detected voltage is normal indicating signal to control the main power switch of the main power path insurance ;; supplied to the load measured output voltage of the main power supply voltage abnormality indicating signal when an overvoltage or undervoltage, the control path backup power supply switch ^ f min to a load; the main power supply voltage detector is further over-voltage comprising: a main power supply voltage for over-voltage full-repellency test, the measured half 4 when the main power supply voltage is normal, reduced from the original point undervoltage undervoltage undervoltage detection point to the hysteresis switch point, or the overpressure from the original point overvoltage point it reaches the overvoltage detection hysteresis switch point, or the point is lowered from the original Brown Brown Brown detection hysteresis point to the switching point, and the point from primary overvoltage overvoltage point raised their overvoltage detection hysteresis switching point; normal voltage indication signal to the power switch path and a backup path main power switch, the power switch controls a main road main power to a load, the power switch off the control preparation ^ P channel power supplied to the load points 检测出主电源电压过压或欠压时将电压异常的指示信号传送给主路功率开关和备路功率开关,控制主路功率开关切断提供给负载的主电源,控制备路功率开关将备份电源提供给负载;并将欠压点设置在原欠压点,将过压点设置在原过压点。 Mains voltage is detected when the overvoltage or undervoltage voltage abnormality indicating signal is transmitted to the main power switch path and a backup path power switch, the power control switch off the main road to the load of the main power supply, the power switch control path backup power backup supplied to the load; Brown and Brown in the original point is set point, the overvoltage set point in the original overvoltage point.
CN 200710165110 2007-10-29 2007-10-29 Method and apparatus for controlling and switching main and backup power CN100563080C (en)

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