CN100563080C - The method of main power supply switching controls and device - Google Patents
The method of main power supply switching controls and device Download PDFInfo
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- CN100563080C CN100563080C CNB2007101651103A CN200710165110A CN100563080C CN 100563080 C CN100563080 C CN 100563080C CN B2007101651103 A CNB2007101651103 A CN B2007101651103A CN 200710165110 A CN200710165110 A CN 200710165110A CN 100563080 C CN100563080 C CN 100563080C
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit 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
- H02J9/06—Circuit 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, e.g. UPS systems
Abstract
The embodiment of the invention discloses a kind of device of main power supply switching controls, this device comprises main road power switch module, overvoltage/undervoltage detection module, the road is slow fully opens module and is equipped with the road control module.The embodiment of the invention also discloses a kind of method of main power supply switching controls.The scheme of the embodiment of the invention makes the switching controls of main power supply more perfect.
Description
Technical field
The present invention relates to power technology, relate in particular to a kind of method and device of main power supply switching controls.
Background technology
When carrying out electronic equipment or design of electronic circuits,, usually need corresponding main power source that backup battery is set for raising equipment or reliability of system operation; In the implementation of backup battery was set, the main power supply switching controls was one of sport technique segment of most critical.
Referring to Fig. 1, be the structural representation of main power supply switching control in the prior art.This device comprises main road power switch module, under-voltage detection module, the road is slow fully opens module and is equipped with the road control module.
Described under-voltage detection module is used for the main power voltage of importing this device is carried out under-voltage detection, detects to export when voltage is higher than at under-voltage to be higher than under-voltage index signal; Detect and export under-voltage index signal when voltage is lower than electrical voltage point.Described under-voltage detection module adopts expensive special chip to realize.
Described main road power switch module, receive by described under-voltage detection module transmit be higher than under-voltage index signal the time, provide main power source to load; When receiving the under-voltage index signal that transmits by described overvoltage/undervoltage detection module, cut off the main power source that offers load.Described main road power switch module adopts diode to realize.
Described road fully is slow opens module, slowly backup battery is sent to road control module fully when being used to be implemented in this device connecting system.The described slow module that opens in road that is equipped with adopts resolution element and expensive special chip to realize.Described system finishes the motherboard that load is powered.
The described road control module that is equipped with, receive by described under-voltage detection module transmit be higher than under-voltage index signal the time, cut off offer load the road is slow opens the backup battery that module transmits by being equipped with; When receiving the under-voltage index signal that transmits by described overvoltage/undervoltage detection module, provide that road fully is slow opens backup battery that module transmits to load.
At present, in the circuit implementing scheme of the device of main power supply switching controls shown in Figure 1, adopt circuit shown in Figure 2 usually.Main road power switch module among Fig. 1 realizes by the diode D1 among Fig. 2, main power source and backup battery close the Lu Houwei load by diode D1 energising are provided, be higher than under the situation of under-voltage point in main power source input, what provide power supply for load is to close main power source behind the road by diode D1.The slow module that opens in road that is equipped with among Fig. 1 realizes by MOS switch Q1, hot plug chip LT1422U2 among Fig. 2, R7, R1, C2 and C1, by hot plug chip LT1422 U2, R7, R1, C2 and C1, control MOS switch Q1 slowly opens, and sends the backup battery of importing MOS switch Q1 to PMOS pipe Q2.Under-voltage detection module among Fig. 1 is realized by voltage monitoring chip MC33161U2, R5 among Fig. 2 and R6, be used for main power voltage is carried out under-voltage detection, when main power voltage is lower than at under-voltage, voltage monitoring chip MC33161 U2 output LOW voltage, control PMOS pipe Q2 conducting offers load with backup battery.The road control module that is equipped with among Fig. 1 realizes by Q2, R2 among Fig. 2, R3 and D2.There is following shortcoming in the scheme of existing main power supply switching controls:
Prior art is just carried out under-voltage detection by under-voltage detection module to main power source; can switch to backup battery from main power source when making main power source be lower than at under-voltage; but when main power voltage is too high, do not have the corresponding protection measure, cause the device of main power supply switching controls and power supply load to damage thus.Thereby, making the switching controls imperfection of main power supply, can not guarantee safely load to be powered.
As seen, the scheme of existing main power supply switching controls has incomplete shortcoming.
Summary of the invention
The embodiment of the invention provides a kind of device of main power supply switching controls, and this device can make the switching controls of main power supply more perfect.
The embodiment of the invention provides a kind of method of main power supply switching controls, and this method can make the switching controls of main power supply more perfect.
A kind of device of main power supply switching controls, this device comprise main road power switch module, overvoltage/undervoltage detection module, the road is slow fully opens module and is equipped with the road control module;
Described overvoltage/undervoltage detection module is used for that the main power voltage of importing this device is carried out overvoltage/undervoltage and detects, and detects the voltage normal index signal of output voltage just often; Detect electric voltage over press or the unusual index signal of output voltage when under-voltage;
Described main road power switch module receives the normal index signal of voltage that is transmitted by described overvoltage/undervoltage detection module, provides main power source to load; Receive the index signal of the electric voltage exception that transmits by described overvoltage/undervoltage detection module, cut off the main power source that offers load;
The described road control module that is equipped with receives the index signal by the electric voltage exception of described overvoltage/undervoltage detection module transmission, provides backup battery to load; Receive the normal index signal of voltage that transmits by described overvoltage/undervoltage detection module, cut off the backup battery that offers load.
A kind of method of main power supply switching controls, this method comprises:
Main power voltage is carried out overvoltage/undervoltage detect, detect the voltage normal index signal of output voltage just often, control main road power switch offers load with main power source;
Detect the main power voltage overvoltage or the unusual index signal of output voltage when under-voltage, control is equipped with the road power switch backup battery is offered load.
From such scheme as can be seen, the embodiment of the invention is not only carried out under-voltage detection to main power source, also main power source is carried out overvoltage and detects, and when main power source is lower than under-voltage point or was higher than pressure point, all switches to backup battery from main power source.Thereby, make the switching controls of main power supply more perfect, more effectively normal power supply is carried out in load.
Description of drawings
Fig. 1 is the apparatus structure schematic diagram of main power supply switching controls in the prior art;
Fig. 2 is the circuit diagram of the device of main power supply switching controls in the prior art;
Fig. 3 is the apparatus structure schematic diagram of embodiment of the invention main power supply switching controls;
Fig. 4 is the circuit diagram of the device of embodiment of the invention main power supply switching controls;
Fig. 5 is the circuit diagram of overvoltage/undervoltage detection module 120 and main road power switch module 110 among Fig. 4;
Fig. 6 is the circuit diagram of sluggish control module 150 among Fig. 4;
Fig. 7 is for being equipped with the slow circuit diagram that opens module 140 in road among Fig. 4;
Fig. 8 is the circuit diagram that is equipped with road control module 130 among Fig. 4;
Fig. 9 is the circuit diagram of main road abnormal show module 160 among Fig. 4.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing, the present invention is described in more detail.
Referring to Fig. 3, be the apparatus structure schematic diagram of embodiment of the invention main power supply switching controls, this device comprises main road power switch module 110, overvoltage/undervoltage detection module 120, the road is slow fully opens module 140 and is equipped with road control module 130.
Overvoltage/undervoltage detection module 120 is used for that the main power voltage of importing this device is carried out overvoltage/undervoltage and detects, and detects the voltage normal index signal of output voltage just often; Detect electric voltage over press or the unusual index signal of output voltage when under-voltage.
Main road power switch module 110 when receiving the normal index signal of voltage that is transmitted by overvoltage/undervoltage detection module 120, provides main power source to load; When receiving the index signal of the electric voltage exception that transmits by overvoltage/undervoltage detection module 120, cut off the main power source that offers load.
Main road power switch module 110 can realize by diode, also can realize by the MOS switch.If adopt the MOS switch to realize, when the MOS switch conduction provided power supply for load, the internal resistance during owing to the MOS switch conduction was very little, and the loss of voltage is little, can reduce power consumption.
Be equipped with road control module 130, when receiving the index signal of the electric voltage exception that transmits by overvoltage/undervoltage detection module 120, provide by being equipped with the slow backup battery of module 140 transmission that opens in road to load; When receiving the normal index signal of voltage that transmits by overvoltage/undervoltage detection module 120, cut off offer load the road is slow opens the backup battery that module 140 transmits by being equipped with.
Be equipped with road control module 130 and comprise road power switch control module 131 and road power switch module 132 fully fully.
Be equipped with road power switch control module 131, when being used to receive the index signal of the electric voltage exception that is transmitted by overvoltage/undervoltage detection module 120, control is equipped with road power switch module 132 provides that the road is slow opens backup battery that module 140 transmits to load by being equipped with; When receiving the normal index signal of voltage that transmits by overvoltage/undervoltage detection module 120, control be equipped with road power switch module 132 cut off offer load the road is slow opens the backup battery that module 140 transmits by being equipped with.
Be equipped with road power switch module 132, be used under the control that is equipped with road power switch control module 131, provide that the road is slow opens backup battery that module 140 transmits to load by being equipped with, perhaps, cut off offer load the road is slow opens the backup battery that module 140 transmits by being equipped with.
The road is slow fully opens module 140, slowly backup battery is sent to road control module 130 fully when being used to be implemented in this device connecting system.Being equipped with the slow module 140 that opens in road comprises that the road is slow fully and opens power switch module 142 and be equipped with the anti-shake and slow module 141 that opens in road.
Be equipped with the anti-shake and slow module 141 that opens in road, with be equipped with the slow input that opens power switch module 142 in road and link to each other respectively with output, when this device connecting system, control is equipped with the slow power switch module 142 anti-shake ground that open, road and slowly backup battery is sent to road power switch module 132 fully; Be equipped with that the road is slow opens power switch module 142, be used for sending backup battery to road power switch module 132 fully being equipped with under the anti-shake and slow control of opening module 141 in road.
Be equipped with the road slow open module 140 can be with of the prior art identical, just by realizations such as hot plug chip LT1422 U2; Can realize that also its physical circuit can be for shown in Figure 7 by resolution element.Because the cost of resolution element is more much lower than the assembly of hot plug chip LT1422 U2, like this, has reduced cost.
Alternatively, the device of the main power supply switching controls of the embodiment of the invention further comprises sluggish control module 150, when being used to receive the normal index signal of voltage that is transmitted by overvoltage/undervoltage detection module 120, sends sluggish signal to overvoltage/undervoltage detection module 120; During the index signal of the electric voltage exception that reception is transmitted by overvoltage/undervoltage detection module 120, do not send sluggish signal to overvoltage/undervoltage detection module 120.
Correspondingly, overvoltage/undervoltage detection module 120 is reduced to under-voltage detection sluggish switching point with under-voltage from former under-voltage point according to the described sluggish signal that receives; Perhaps, will cross pressure point increases overvoltage and detects sluggish switching point from the former pressure point of crossing; Perhaps, be reduced to the sluggish switching point of under-voltage detection from former under-voltage point, and will cross pressure point and increase overvoltage and detect sluggish switching point from the former pressure point of crossing with under-voltage;
During sluggish signal that the sluggish control module 150 that do not receive overvoltage/undervoltage detection module 120 transmits, under-voltage point is arranged on former under-voltage point, will crosses pressure point and be arranged on the former pressure point of crossing.
Alternatively, the device of the main power supply switching controls of the embodiment of the invention comprises circuit abnormality display module 160, be used to receive the index signal of electric voltage exception of overvoltage/undervoltage detection module 120 outputs after, be shown as the unusual state of main road.
Alternatively, the output of main road power switch module 110 and the output connection of road power switch module 132 fully then, link to each other with circuit abnormality display module 160, for circuit abnormality display module 160 provides power supply; Link to each other with sluggish control module 150, for sluggish control module 150 provides power supply; Be equipped with road power switch control module 131 and link to each other, for road power switch control module 131 fully provides power supply.
According to the actual design situation, the implementation of the apparatus structure of embodiment of the invention main power supply switching controls is varied, here, is that example is specifically described structure shown in Figure 3 with circuit shown in Figure 4.Wherein, main road power switch module 110 adopts the MOS switch to realize.
Referring to Fig. 4, be the circuit diagram of the device of embodiment of the invention main power supply switching controls, marked the specific implementation circuit of each module among the figure.
Referring to Fig. 5, be the circuit diagram of overvoltage/undervoltage detection module 120 among Fig. 4 and main road power switch module 110.Main road power switch module is the MOS switch Q1 described in the figure.The overvoltage/undervoltage detection module adopts 2 TL431 (U1, U2) and peripheral resistance to realize that described peripheral resistance comprises R1, R2, R3, R4, R5, R6 and C1.TL431 is the voltage comparator with reference voltage, and its reference voltage V ref is 2.5V or 1.25V.Realize that by R1, R2 and U1 overvoltage detects, and realizes under-voltage detection by R3, R4 and U2.The former pressure point of crossing of overvoltage detection module is: (1+R1/R2) * and Vref; The former under-voltage point of under-voltage detection module circuit is: (1+R3/R4) * and Vref.
When the main power source input voltage former under-voltage point and former cross between the pressure point (1+R3/R4) * during Vref～(1+R1/R2) * Vref}, overvoltage/undervoltage detection module output Vmoni is a low level voltage, MOS switch Q1 conducting provides power supply by main power source for load; Overvoltage/undervoltage detection module output low level is given sluggish control module simultaneously, realized with under-voltage by former under-voltage point (1+R3/R4) * Vref being reduced to under-voltage detection sluggish switching point [1+ (R3//R22)/R4] * Vref by sluggish control module circuit and overvoltage/undervoltage detection module circuit this moment, correspondingly, the normal voltage of overvoltage/undervoltage detection module by (1+R3/R4) * Vref～(1+R1/R2) * Vref} becomes { [1+ (R3//R22)/R4] * Vref～(1+R1/R2) * Vref}, wherein, R22 is a resistance in the hysteresis control circuit module, referring to Fig. 6.
After this, when the main power source input voltage unusual, when promptly being lower than [1+ (R3//R22)/R4] * Vref or being higher than (1+R1/R2) * Vref, it is high level voltage that overvoltage/undervoltage detects output Vmoni, be that VOUT is a high level, MOS switch Q1 ends, disconnect the current supply circuit that main power source provides for load, simultaneously, the normal voltage scope of overvoltage/undervoltage detection module turn back to (1+R3/R4) * Vref～(1+R1/R2) * Vref}, the normal voltage scope after the overvoltage/undervoltage detection module returns with this is again carried out overvoltage/undervoltage and is detected.Up to detecting voltage just often, repeat said process.
Among Fig. 5, capacitor C 1 is anti-shake electric capacity, does not change in main power voltage transition time output in order to guaranteeing.
Referring to Fig. 6, be the circuit diagram of sluggish control module 150 among Fig. 4, its course of work is referring to the description about Fig. 5.When main power source is unusual, (is lower than under-voltage test point [1+ (R3//R22)/R4] * Vref or is higher than overvoltage test point (1+R1/R2) * Vref), overvoltage/undervoltage detection module output Vmoni is high voltage (referring to Fig. 4), metal-oxide-semiconductor Q6 conducting, diode D2 ends, and sluggish control module is exported overvoltage/undervoltage testing circuit module no signal; When main power source just often, it is low-voltage (referring to Fig. 4) that overvoltage/undervoltage detects output Vmoni, metal-oxide-semiconductor Q6 ends, diode D2 conducting, as seen, under-voltage point determine calculate definite by the R3 in R22 in the sluggish control module and the overvoltage/undervoltage detection module, resistor network that R4 forms.
Sluggish control module circuit shown in Figure 6 can prevent that main power source from when under-voltage point fluctuates continuously, switching the damage that causes the main power supply switching control repeatedly because of main power supply.
Certainly, sluggish control module can also realize preventing that main power source from when the pressure point continuous wave is moving excessively, switching the damage that causes the main power supply switching control repeatedly because of main power supply; Perhaps, sluggish control module can also realize preventing that main power source from when pressure point and under-voltage point fluctuate continuously excessively, switching the damage that causes the main power supply switching control repeatedly because of main power supply.The thinking of sluggish control module according to the present invention, those skilled in the art can adopt multiple corresponding circuit to realize, repeat no more here.
Referring to Fig. 7,, be equipped with the slow slow power switch module that opens in road that is equipped with that opens in the module in road and realize by the MOS switch Q3 among the figure for being equipped with the slow circuit diagram that opens module 140 in road among Fig. 4.In the main power supply switching control insertion system motherboard moment of the embodiment of the invention, because capacitor C 2 both end voltage are not suddenlyd change, PNP triode Q2 conducting, the electric charge of capacitor C 3 is released by Q2 and R9, the gate source voltage VGS of MOS is lower than its threshold voltage vt h, MOS switch Q3 ends, and output voltage V SO is 0.
After the insertion system motherboard is normal, capacitor C 2 both end voltage are charged to backup battery, PNP triode Q2 ends, backup battery begins capacitor C 3 is charged by R10, when the C3 both end voltage was charged to a certain definite magnitude of voltage [Vgh (th)+Vd], the grid of MOS switch Q3 reached on state threshold voltage Vgh (th), and MOS switch Q3 begins conducting, the voltage of VSO still is 0 during this period of time, and length is during this period of time determined jointly by resistance R 10 and capacitor C 3.
After the MOS switch Q3 conducting, C3 is continued charging make the grid source of MOS switch Q3 reach platform voltage (Vplt), at this moment feedback capacity C4, MOS switch source/drain electrode, VSO voltage change with identical voltage change ratio; VSO voltage is with the magnitude of voltage of constant voltage rate of change from 0V to the stand-by power source; After VSO reached the magnitude of voltage of stand-by power source, R10 continued charging to capacitor C 3, and reached the magnitude of voltage of backup battery, the RDS minimum of MOS switch Q3 at this moment, and VDS also reaches minimum, output backup voltage.
Feedback capacity C4 size is determined by surge current and the load capacitance on the VSO that the electric current that flows through it, VSO allow.The voltage changing rate of VSO is the ratio of the load capacitance of the permission surge current of output network VSO and VSO.
Referring to Fig. 8, for being equipped with the circuit diagram of road control module 130 among Fig. 4, the road power switch module fully in the control module of road is the PMOS switch Q5 among Fig. 8 fully.When main power source is unusual, (is lower than under-voltage test point [1+ (R3//R22)/R4] * Vref or is higher than overvoltage test point (1+R1/R2) * Vref), overvoltage/undervoltage detection module output Vmoni is high voltage (referring to Fig. 4), NMOS pipe Q4 conducting, PMOS switch Q5 conducting provides power supply by backup battery for load; Otherwise, when main power voltage just often, it is low-voltage (referring to Fig. 4) that overvoltage/undervoltage detects output Vmoni, is equipped with road power switch module PMOS pipe Q5 and ends, and disconnects the current supply circuit that backup battery provides for load.
Referring to Fig. 9, be the circuit diagram of main road abnormal show module among Fig. 4.When main power source is unusual, (is lower than under-voltage test point [1+ (R3//R22)/R4] * Vref or is higher than overvoltage test point (1+R1/R2) * Vref), overvoltage/undervoltage detection module output Vmoni is high voltage (referring to Fig. 4), NMOS pipe Q7 conducting, LED is lighted, by selecting suitable serial connection current-limiting resistance R26, the operating current that makes LED is in 5～10mA scope; Otherwise, when main power source just often, overvoltage/undervoltage detection module output Vmoni is a low-voltage, NMOS pipe Q7 ends, LED is not lighted.
Certainly, the device of the main power supply switching controls that the thinking of the employing embodiment of the invention can realize is not limited only to the above-mentioned circuit, does not enumerate one by one here.
The embodiment of the invention not only discloses the device of main power supply switching controls, also discloses the method for main power supply switching controls, and this method comprises:
Main power voltage is carried out overvoltage/undervoltage detect, detect the voltage normal index signal of output voltage just often, control main road power switch offers load with main power source;
Detect the main power voltage overvoltage or the unusual index signal of output voltage when under-voltage, control is equipped with the road power switch backup battery is offered load.
Describedly main power voltage is carried out overvoltage/undervoltage detect and further to comprise:
Main power voltage is carried out overvoltage/undervoltage to be detected, detect main power voltage just often, be reduced to the sluggish switching point of under-voltage detection with under-voltage from former under-voltage point, perhaps, to cross pressure point increases overvoltage and detects sluggish switching point from the former pressure point of crossing, perhaps, be reduced to the sluggish switching point of under-voltage detection from former under-voltage point, and will cross pressure point and increase overvoltage and detect sluggish switching point from the former pressure point of crossing with under-voltage; The normal index signal of voltage is sent to the main road power switch and is equipped with the road power switch, and control main road power switch offers load with main power source, and control is equipped with the road power switch and cuts off the backup battery that offers load;
Detect the main power voltage overvoltage or the index signal of electric voltage exception is sent to the main road power switch and is equipped with the road power switch when under-voltage, control main road power switch cuts off the main power source that offers load, and control is equipped with the road power switch backup battery is offered load; And under-voltage point is arranged on former under-voltage point, will cross pressure point and be arranged on the former pressure point of crossing.
Described main road power switch module can adopt the MOS switch.
This method can also comprise: the state during to the main power source normal power supply shows.
The embodiment of the invention is not only carried out under-voltage detection to main power source by the overvoltage/undervoltage detection module, also main power source is carried out overvoltage and detects, and is unusual when main power source, when promptly main power source is lower than under-voltage point or was higher than pressure point, all switches to backup battery from main power source.Thereby, make the switching controls of main power supply more perfect, more effectively normal power supply is carried out in load.
And compared with prior art, the scheme of embodiment of the invention main power supply switching controls also has following advantage:
1) in the prior art, provide power supply because main road power switch module adopts diode to close the road for load, because the characteristic of diode itself, the loss of voltage is big in the time of will causing powering, and power consumption is big.And when main road power switch module adopted the MOS switch to realize in the embodiment of the invention, the MOS switch conduction offered load with main power source, and the internal resistance during the MOS switch conduction is very little, and the loss of voltage is little, has reduced power consumption.
2) because the main devices of the circuit of the device of the main power supply switching controls of prior art has adopted 2 special chips: hot plug chip LT1422 and voltage monitoring chip MC33161, this has caused cost higher relatively.And the kind of main devices is more relatively in the prior art: except that 2 kinds of special chips, also have a kind of power NMOS pipe, and a kind of power P MOS and a kind of diode, this also will cause cost to rise.And the circuit of embodiment of the invention main power supply switching controls adopts routine, general-purpose device to realize, its cost mainly is presented as on the cost of TL431 and MOS switch, and the cost of TL431 and MOS switch is than special chip (hot plug chip LT1422, voltage monitoring chip MC33161) much lower, thereby, reduced cost.
And the major function part category that the circuit of embodiment of the invention main power supply switching controls adopts is less, and the normalization of part category also can bring cost advantage, thereby, further reduced cost.
3) power that needs at load, the difference of voltage, only need to adjust the MOS switch that is used to realize main road power switch module, be used to realize the slow MOS switch that opens the power switch module in road fully, and the MOS switch of realizing being equipped with road power switch module, can meet the demands, it is easy to use.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; and be not intended to limit the scope of the invention; within the spirit and principles in the present invention all, any modification of being made, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1, a kind of device of main power supply switching controls is characterized in that, this device comprises main road power switch module, overvoltage/undervoltage detection module, is equipped with road control module and sluggish control module;
Described overvoltage/undervoltage detection module is used for that the main power voltage of importing this device is carried out overvoltage/undervoltage and detects, and detects the voltage normal index signal of output voltage just often; Detect electric voltage over press or the unusual index signal of output voltage when under-voltage;
Described main road power switch module receives the normal index signal of voltage that is transmitted by described overvoltage/undervoltage detection module, provides main power source to load; Receive the index signal of the electric voltage exception that transmits by described overvoltage/undervoltage detection module, cut off the main power source that offers load;
The described road control module that is equipped with receives the index signal by the electric voltage exception of described overvoltage/undervoltage detection module transmission, provides backup battery to load; Receive the normal index signal of voltage that transmits by described overvoltage/undervoltage detection module, cut off the backup battery that offers load;
Described sluggish control module is used for sending sluggish signal to described overvoltage/undervoltage detection module when receiving the normal index signal of voltage that is transmitted by described overvoltage/undervoltage detection module; And when receiving the index signal of the electric voltage exception that transmits by described overvoltage/undervoltage detection module, do not send sluggish signal to described overvoltage/undervoltage detection module;
Described overvoltage/undervoltage detection module is according to the described sluggish signal that receives, and to under-voltage point, mistake pressure point, perhaps under-voltage point and mistake pressure point are adjusted.
2, device as claimed in claim 1 is characterized in that, this device comprises that fully the road is slow and open module, is used for slowly backup battery being sent to being equipped with the road control module; The described slow module that opens in road that is equipped with comprises that the road is slow fully and opens the power switch module and be equipped with the anti-shake and slow module that opens in road;
The described road that is equipped with is anti-shake and slowly open module, is used for control and is equipped with the slow power switch module that opens in road and anti-shakely slowly backup battery is sent to and be equipped with the road control module;
Describedly be equipped with that the road is slow opens the power switch module, be used for sending backup battery to road control module fully being equipped with under the anti-shake and slow control of opening module in road.
3, device as claimed in claim 1 is characterized in that, described overvoltage/undervoltage detection module is further used for being reduced to under-voltage detection sluggish switching point with under-voltage from former under-voltage point according to the described sluggish signal that receives; Perhaps, will cross pressure point increases overvoltage and detects sluggish switching point from the former pressure point of crossing; Perhaps, be reduced to the sluggish switching point of under-voltage detection from former under-voltage point, and will cross pressure point and increase overvoltage and detect sluggish switching point from the former pressure point of crossing with under-voltage;
During sluggish signal that the sluggish control module of not receiving described overvoltage/undervoltage detection module transmits, under-voltage point is arranged on former under-voltage point, will crosses pressure point and be arranged on the former pressure point of crossing.
4, device as claimed in claim 1 is characterized in that, the described road control module that is equipped with comprises road power switch control module and road power switch module fully fully;
The described road power switch control module that is equipped with, when being used to receive the index signal of the electric voltage exception that is transmitted by described overvoltage/undervoltage detection module, controlling the described road power switch module that is equipped with provides backup battery to load; When receiving the normal index signal of voltage that transmits by described overvoltage/undervoltage detection module, control the described road power switch module that is equipped with and cut off the backup battery that offers load;
The described road power switch module that is equipped with is used for providing backup battery to load under the control of described road power switch control module fully, perhaps, cuts off the backup battery that offers load.
5, device as claimed in claim 2 is characterized in that, describedly is equipped with that the road is slow opens module and realize by resolution element.
6, device as claimed in claim 1 is characterized in that, described main road power switch module is the MOS switch.
7, device as claimed in claim 1 is characterized in that, this device further comprises the circuit abnormality display module, be used to receive the index signal of electric voltage exception of overvoltage/undervoltage detection module output after, be shown as the unusual state of main road.
8, a kind of method of main power supply switching controls is characterized in that, this method comprises:
Main power voltage is carried out overvoltage/undervoltage detect, detect the voltage normal index signal of output voltage just often, control main road power switch offers load with main power source;
Detect the main power voltage overvoltage or the unusual index signal of output voltage when under-voltage, control is equipped with the road power switch backup battery is offered load;
Describedly main power voltage is carried out overvoltage/undervoltage detect and further to comprise:
Main power voltage is carried out overvoltage/undervoltage to be detected, detect main power voltage just often, be reduced to the sluggish switching point of under-voltage detection with under-voltage from former under-voltage point, perhaps, to cross pressure point increases overvoltage and detects sluggish switching point from the former pressure point of crossing, perhaps, be reduced to the sluggish switching point of under-voltage detection from former under-voltage point, and will cross pressure point and increase overvoltage and detect sluggish switching point from the former pressure point of crossing with under-voltage; The normal index signal of voltage is sent to the main road power switch and is equipped with the road power switch, and control main road power switch offers load with main power source, and control is equipped with the road power switch and cuts off the backup battery that offers load;
Detect the main power voltage overvoltage or the index signal of electric voltage exception is sent to the main road power switch and is equipped with the road power switch when under-voltage, control main road power switch cuts off the main power source that offers load, and control is equipped with the road power switch backup battery is offered load; And under-voltage point is arranged on former under-voltage point, will cross pressure point and be arranged on the former pressure point of crossing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101651103A CN100563080C (en) | 2007-10-29 | 2007-10-29 | The method of main power supply switching controls and device |
| PCT/CN2008/072788 WO2009059516A1 (en) | 2007-10-29 | 2008-10-22 | Device and method for controlling switch of main power supply and backup power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007101651103A CN100563080C (en) | 2007-10-29 | 2007-10-29 | The method of main power supply switching controls and device |
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| Publication Number | Publication Date |
|---|---|
| CN101202468A CN101202468A (en) | 2008-06-18 |
| CN100563080C true CN100563080C (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007101651103A Active CN100563080C (en) | 2007-10-29 | 2007-10-29 | The method of main power supply switching controls and device |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100563080C (en) |
| WO (1) | WO2009059516A1 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100563080C (en) * | 2007-10-29 | 2009-11-25 | 成都市华为赛门铁克科技有限公司 | The method of main power supply switching controls and device |
| CN101728866B (en) * | 2008-10-21 | 2012-06-13 | 中兴通讯股份有限公司 | Device and method for realizing switching of power supply |
| CN103048521A (en) * | 2012-12-31 | 2013-04-17 | 浙江雷顿电气科技有限公司 | Voltage detection device of automatic change-over switch |
| CN104038237A (en) * | 2014-06-12 | 2014-09-10 | 四川联友电讯技术有限公司 | High-stability transmitter combiner power supply interface circuit |
| CN104319870B (en) * | 2014-09-22 | 2017-02-15 | 邦彦技术股份有限公司 | Power supply system supporting redundancy backup and hot plug |
| CN104539041B (en) * | 2014-12-09 | 2017-01-18 | 广东美的暖通设备有限公司 | VRF air conditioner system, back-up source device of indoor unit of VRF air conditioner system and control method |
| US10439602B2 (en) * | 2016-07-07 | 2019-10-08 | ProGrAnalog Corporation | Electronic power switch |
| CN106787129B (en) * | 2016-12-15 | 2023-11-21 | 山东金洲科瑞节能科技有限公司 | Power management system capable of automatically realizing switching between main power supply and standby power supply |
| CN107358901A (en) * | 2017-08-10 | 2017-11-17 | 天津美森电子有限公司 | A kind of digital display tube that alarm function is compared with electric current |
| CN108362932A (en) * | 2017-09-08 | 2018-08-03 | 广州供电局有限公司 | Electric energy meter battery undervoltage detection device |
| CN109831018B (en) * | 2017-11-16 | 2022-09-16 | 华为终端有限公司 | Power supply combining circuit, control method and vehicle-mounted wireless communication terminal |
| CN108512405A (en) * | 2018-01-16 | 2018-09-07 | 深圳市嘉利达专显科技有限公司 | A kind of power supply backup and fault detection circuit of display |
| US11303148B2 (en) * | 2019-01-09 | 2022-04-12 | Rheem Manufacturing Company | Integrated uninterruptible power supplies for appliances |
| CN110994772A (en) * | 2019-06-11 | 2020-04-10 | 联正电子(深圳)有限公司 | Power distribution system and control method thereof |
| CN111009892A (en) * | 2019-06-11 | 2020-04-14 | 联正电子(深圳)有限公司 | Distribution board |
| CN110808629B (en) * | 2019-10-15 | 2021-10-22 | 合肥联宝信息技术有限公司 | Dual-power switching circuit and dual-power switching controller |
| CN113437793A (en) * | 2021-05-18 | 2021-09-24 | 湖南中联重科智能高空作业机械有限公司 | Sucker vehicle power supply system and sucker vehicle |
| CN113725995B (en) * | 2021-08-24 | 2024-01-02 | 南京南瑞继保电气有限公司 | Dual-backup power supply management system and management method for power distribution terminal |
| CN113777993A (en) * | 2021-09-17 | 2021-12-10 | 青海高景太阳能科技有限公司 | Centralized control device based on ZigBee-IoT |
| CN114397957A (en) * | 2022-01-15 | 2022-04-26 | 上海列拓科技有限公司 | Low-power-consumption power management circuit for MCU chip, and MCU chip |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT405703B (en) * | 1996-07-23 | 1999-11-25 | Siemens Ag Oesterreich | POWER SUPPLY |
| CN1310396C (en) * | 2002-08-02 | 2007-04-11 | 华为技术有限公司 | Power supply switching circuit for detection |
| JP4407808B2 (en) * | 2004-03-31 | 2010-02-03 | サンケン電気株式会社 | Power supply |
| CN100563080C (en) * | 2007-10-29 | 2009-11-25 | 成都市华为赛门铁克科技有限公司 | The method of main power supply switching controls and device |
-
2007
- 2007-10-29 CN CNB2007101651103A patent/CN100563080C/en active Active
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2008
- 2008-10-22 WO PCT/CN2008/072788 patent/WO2009059516A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| CN101202468A (en) | 2008-06-18 |
| WO2009059516A1 (en) | 2009-05-14 |
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