CN203504280U - Direct current power supply under-voltage automatic switching system based on microprocessor power supply monitor - Google Patents
Direct current power supply under-voltage automatic switching system based on microprocessor power supply monitor Download PDFInfo
- Publication number
- CN203504280U CN203504280U CN201320571327.5U CN201320571327U CN203504280U CN 203504280 U CN203504280 U CN 203504280U CN 201320571327 U CN201320571327 U CN 201320571327U CN 203504280 U CN203504280 U CN 203504280U
- Authority
- CN
- China
- Prior art keywords
- power supply
- relay
- connects
- dog
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Direct Current Feeding And Distribution (AREA)
Abstract
The utility model relates to a direct current power supply under-voltage automatic switching system based on a microprocessor power supply monitor. The direct current power supply under-voltage automatic switching system includes the microprocessor power supply monitor, a resistor R1, a resistor R2, a main power supply, a relay K1 coil, a relay K1 normally open contact, a relay K1 normally closed contact point, a triode T1, a resistor R3, a resistor R4, and a backup power supply. The direct current power supply under-voltage automatic switching system has advantages of being simple in circuit, being low in cost, having hysteretic characteristics at a switching point, being reliable in switching, being capable of setting a switching point voltage flexibly, and being capable of providing a reliable switching circuit for devices of the main direct current power supply and the backup power direct current power supply.
Description
Technical field
The utility model relates to the under-voltage automatic switchover of a kind of DC power supply, the under-voltage automatic switchover system of especially a kind of DC power supply based on power supply of microprocessor watch-dog.
Background technology
The equipment that ask for something has an active and standby DC power supply requires to automatically switch to stand-by power supply during lower than certain value at voltage, when main power voltage returns to after certain value, switches back again main power source.More existing switching device shifters, circuit is simple, can only realize power down and switch, or just switch lower than the pick-up voltage of transfer relay or contactor coil, can not realize flexibly at required under-voltage point and switching.
Utility model content
In view of this, the purpose of this utility model is to provide the under-voltage automatic switchover system of a kind of DC power supply based on power supply of microprocessor watch-dog, can realize and automatically switch to stand-by power supply during lower than certain voltage when main power source, main power source is during higher than certain voltage, automatically switch the back again function of main power source, and can change under-voltage point and switch by adjusting sampling resistor resistance.
The utility model adopts following scheme to realize: the under-voltage automatic switchover system of a kind of DC power supply based on power supply of microprocessor watch-dog, comprise a power supply of microprocessor watch-dog, it is characterized in that: the vdd terminal of described power supply of microprocessor watch-dog connects one end of a resistance R 1 and one end of a resistance R 2, the other end of described resistance R 1 connects the positive pole of a main power source, one end of one end of one relay K 1 coil and relay K 1 normally opened contact, the other end of described relay K 1 coil connects the collector electrode of a triode T1, the base stage of described triode T1 connects one end of a resistance R 3 and one end of a resistance R 4, the other end of described resistance R 3 connects the RST end of described power supply of microprocessor watch-dog, the other end of described relay K 1 normally opened contact connects one end of relay K 1 normally-closed contact and the positive pole of load, the other end of described relay K 1 normally-closed contact connects the positive pole of a stand-by power supply, the other end of described resistance R 2, the VSS end of power supply of microprocessor watch-dog, the other end of resistance R 4, the other end of triode T1, the negative pole of main power source, the negative pole of stand-by power supply and the minus earth of load.
In the utility model one embodiment, also comprise a capacitor C 1, its one end connects the base stage of described triode T1, other end ground connection.
In the utility model one embodiment, also comprise a diode D1, its negative electrode connects one end of described relay K 1 coil, the other end of relay K 1 coil described in anodic bonding.
In the utility model one embodiment, also comprise a diode D2, the positive pole of main power source described in its anodic bonding, negative electrode connects the positive pole of described load.
In the utility model one embodiment, also comprise a diode D3, one end of relay K 1 normally-closed contact described in its anodic bonding, negative electrode connects the positive pole of described load.
The utility model circuit is simple, cost is low, at switching point, there is hysteretic characteristic, switch reliably, switching point voltage can be set flexibly, the equipment of active and standby DC power supply provides reliable commutation circuit, can realize and automatically switch to stand-by power supply during lower than certain voltage when main power source, main power source is during higher than certain voltage, the function of the main power source that automatically switches back again, and can change under-voltage point and switch by adjusting sampling resistor resistance.
For making the purpose of this utility model, technical scheme and advantage clearer, below will, by specific embodiment and relevant drawings, the utility model be described in further detail.
Accompanying drawing explanation
Fig. 1 is the circuit system schematic diagram of the utility model one preferred embodiment.
Embodiment
As shown in Figure 1, the utility model provides a kind of DC power supply based on power supply of microprocessor watch-dog under-voltage automatic switchover system, comprise a power supply of microprocessor watch-dog U1, the vdd terminal of described power supply of microprocessor watch-dog U1 connects one end of a resistance R 1 and one end of a resistance R 2, the other end of described resistance R 1 connects the positive pole of a main power source, one end of one end of one relay K 1 coil and relay K 1 normally opened contact, the other end of described relay K 1 coil connects the collector electrode of a triode T1, the base stage of described triode T1 connects one end of a resistance R 3 and one end of a resistance R 4, the other end of described resistance R 3 connects the RST end of described power supply of microprocessor watch-dog U1, the other end of described relay K 1 normally opened contact connects one end of relay K 1 normally-closed contact and the positive pole of load, the other end of described relay K 1 normally-closed contact connects the positive pole of a stand-by power supply, the other end of described resistance R 2, the VSS end of power supply of microprocessor watch-dog U1, the other end of resistance R 4, the other end of triode T1, the negative pole of main power source, the negative pole of stand-by power supply and the minus earth of load.
Described power supply of microprocessor watch-dog U1 model is MCP100, SGM803, CAT803 or CAT809 etc., can carry out High Precision Monitor to power supply, it has a plurality of operational high-accuracy voltage trip points, utilize its feature to voltage monitoring, method with electric resistance partial pressure, main power source is carried out to electric resistance partial pressure sampling, select suitable resistance value, while making under-voltage switching occurs, the sampled voltage at sampling resistor R2 two ends is voltage jump point voltage, power supply of microprocessor watch-dog is according to the voltage of VDD input, corresponding high in the output of RST reset terminal, low level is controlled triode and is driven or release relay, thereby realizing main power supply switches.
Wherein, R1, R2 are sampling resistor, and for sampling to being added in the main power voltage at R1 and R2 two ends, sampled voltage is R2 both end voltage; Power supply of microprocessor watch-dog U1 monitors the voltage of its VDD input, lower than its voltage jump point, and RST reset terminal output low level, higher than voltage jump point, RST reset terminal is exported high level; R3 is current-limiting resistance, for limiting the base current of triode T1; R4 is biasing resistor, for the triode T1 base stage of setovering.
Continue referring to Fig. 1, also comprise a capacitor C 1, one end of described capacitor C 1 connects the base stage of described triode T1, the other end ground connection of described capacitor C 1, capacitor C 1 is filter capacitor, can produce the hysteretic characteristic of 0.7～0.8V at switching point, improves the reliability that device switches; Also comprise a diode D1, the negative electrode of described diode D1 connects one end of described relay K 1 coil, the other end of relay K 1 coil described in the anodic bonding of described diode D1, diode D1 plays afterflow effect, prevents relay K 1 coil blackout moment generation high voltage harm device security; Also comprise a diode D2, the positive pole of main power source described in the anodic bonding of described diode D2, the negative electrode of described diode D2 connects the positive pole of described load, and diode D2 is used at powered on moment, connect main power source to load, prevent that relay K 1 from ceaselessly carrying out switching action; Also comprise a diode D3, one end of relay K 1 normally-closed contact described in the anodic bonding of described diode D3, the negative electrode of described diode D3 connects the positive pole of described load, and diode D3 is used for cutting off main power source and stand-by power supply, prevents that main power source from flowing to stand-by power supply through D2.
Operation principle below in conjunction with the under-voltage automatic switchover system of circuit structure explanation the utility model DC power supply of the present utility model: after powering on, power supply of microprocessor watch-dog judges the voltage on its VDD input, if this voltage is higher than the voltage jump point of power supply of microprocessor watch-dog, high level of RST reset terminal output of power supply of microprocessor watch-dog is to the base stage of triode, the conducting of the triode CE utmost point, relay coil obtains electric, relay adhesive action, relay normally open contact is closed, connects main power source; If this voltage is lower than the voltage jump point of power supply of microprocessor watch-dog, low level of RST reset terminal output of power supply of microprocessor watch-dog is to the base stage to triode, the cut-off of the triode CE utmost point, relay coil dead electricity discharges, relay normally open contact disconnects, normally-closed contact is closed, connects stand-by power supply.Adjust R1, R2 ratio, just can realize when main power source drops to certain point voltage value and automatically switch to stand-by power supply, when main power source recovers, when R2 both end voltage is greater than the voltage jump point of power supply of microprocessor watch-dog, RST reset terminal output high level, relay is energized action again, and relay normally-closed contact disconnects, and disconnects stand-by power supply, normally opened contact is closed, connect main power source, thereby realized main power source, automatically switch to stand-by power supply when under-voltage, the main power source main power source that automatically switches back while recovering.This handoff procedure time, the nearly 20ms of relay adhesive or release movement, the load inner electrochemical capacitor storing energy of being with in rear end can maintain about 100ms, handoff procedure on load running without impact.
Above-listed preferred embodiment; the purpose of this utility model, technical scheme and advantage are further described; institute is understood that; the foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (5)
1. the under-voltage automatic switchover system of the DC power supply based on power supply of microprocessor watch-dog, comprise a power supply of microprocessor watch-dog, it is characterized in that: the vdd terminal of described power supply of microprocessor watch-dog connects one end of a resistance R 1 and one end of a resistance R 2, the other end of described resistance R 1 connects the positive pole of a main power source, one end of one end of one relay K 1 coil and relay K 1 normally opened contact, the other end of described relay K 1 coil connects the collector electrode of a triode T1, the base stage of described triode T1 connects one end of a resistance R 3 and one end of a resistance R 4, the other end of described resistance R 3 connects the RST end of described power supply of microprocessor watch-dog, the other end of described relay K 1 normally opened contact connects one end of relay K 1 normally-closed contact and the positive pole of load, the other end of described relay K 1 normally-closed contact connects the positive pole of a stand-by power supply, the other end of described resistance R 2, the VSS end of power supply of microprocessor watch-dog, the other end of resistance R 4, the other end of triode T1, the negative pole of main power source, the negative pole of stand-by power supply and the minus earth of load.
2. the under-voltage automatic switchover system of the DC power supply based on power supply of microprocessor watch-dog according to claim 1, is characterized in that: also comprise a capacitor C 1, its one end connects the base stage of described triode T1, other end ground connection.
3. the under-voltage automatic switchover system of the DC power supply based on power supply of microprocessor watch-dog according to claim 1, it is characterized in that: also comprise a diode D1, its negative electrode connects one end of described relay K 1 coil, the other end of relay K 1 coil described in anodic bonding.
4. the under-voltage automatic switchover system of the DC power supply based on power supply of microprocessor watch-dog according to claim 1, is characterized in that: also comprise a diode D2, and the positive pole of main power source described in its anodic bonding, negative electrode connects the positive pole of described load.
5. the under-voltage automatic switchover system of the DC power supply based on power supply of microprocessor watch-dog according to claim 1, it is characterized in that: also comprise a diode D3, one end of relay K 1 normally-closed contact described in its anodic bonding, negative electrode connects the positive pole of described load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320571327.5U CN203504280U (en) | 2013-09-16 | 2013-09-16 | Direct current power supply under-voltage automatic switching system based on microprocessor power supply monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320571327.5U CN203504280U (en) | 2013-09-16 | 2013-09-16 | Direct current power supply under-voltage automatic switching system based on microprocessor power supply monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203504280U true CN203504280U (en) | 2014-03-26 |
Family
ID=50335225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320571327.5U Expired - Lifetime CN203504280U (en) | 2013-09-16 | 2013-09-16 | Direct current power supply under-voltage automatic switching system based on microprocessor power supply monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203504280U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158284A (en) * | 2014-08-16 | 2014-11-19 | 国网山西省电力公司信息通信分公司 | Electric power emergency wireless communication system |
| CN104158283A (en) * | 2014-08-01 | 2014-11-19 | 科立讯通信股份有限公司 | Circuit and method for realizing smooth switching of main stand-by power source of communication equipment |
| CN104485730A (en) * | 2014-11-28 | 2015-04-01 | 国家电网公司 | Circuit capable of smoothly switching power supply |
| CN104932387A (en) * | 2015-07-03 | 2015-09-23 | 梁超洪 | A main and standby equipment intelligent converter |
| CN107947334A (en) * | 2017-11-21 | 2018-04-20 | 广州圣力电源实业有限公司 | A kind of two-supply circuit system |
| CN108365745A (en) * | 2018-04-26 | 2018-08-03 | 广东美的厨房电器制造有限公司 | Switching Power Supply and cooking equipment |
| CN108418300A (en) * | 2018-05-09 | 2018-08-17 | 广州大学 | A kind of standby usage battery powered automatic switchover output circuit |
| CN110198075A (en) * | 2019-04-26 | 2019-09-03 | 科华恒盛股份有限公司 | Redundancy backup power supply and chip and electronic equipment |
| CN110970992A (en) * | 2019-11-01 | 2020-04-07 | 许继电源有限公司 | Dual-power switching device |
-
2013
- 2013-09-16 CN CN201320571327.5U patent/CN203504280U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104158283A (en) * | 2014-08-01 | 2014-11-19 | 科立讯通信股份有限公司 | Circuit and method for realizing smooth switching of main stand-by power source of communication equipment |
| CN104158283B (en) * | 2014-08-01 | 2017-05-17 | 科立讯通信股份有限公司 | Circuit and method for realizing smooth switching of main stand-by power source of communication equipment |
| CN104158284A (en) * | 2014-08-16 | 2014-11-19 | 国网山西省电力公司信息通信分公司 | Electric power emergency wireless communication system |
| CN104485730B (en) * | 2014-11-28 | 2017-08-01 | 国家电网公司 | Take over seamlessly the circuit of power supply |
| CN104485730A (en) * | 2014-11-28 | 2015-04-01 | 国家电网公司 | Circuit capable of smoothly switching power supply |
| CN104932387B (en) * | 2015-07-03 | 2018-03-06 | 梁超洪 | A kind of primary, spare device intelligence converter |
| CN104932387A (en) * | 2015-07-03 | 2015-09-23 | 梁超洪 | A main and standby equipment intelligent converter |
| CN107947334A (en) * | 2017-11-21 | 2018-04-20 | 广州圣力电源实业有限公司 | A kind of two-supply circuit system |
| CN108365745A (en) * | 2018-04-26 | 2018-08-03 | 广东美的厨房电器制造有限公司 | Switching Power Supply and cooking equipment |
| CN108418300A (en) * | 2018-05-09 | 2018-08-17 | 广州大学 | A kind of standby usage battery powered automatic switchover output circuit |
| CN108418300B (en) * | 2018-05-09 | 2023-08-08 | 广州大学 | Main and standby battery power supply automatic switching output circuit |
| CN110198075A (en) * | 2019-04-26 | 2019-09-03 | 科华恒盛股份有限公司 | Redundancy backup power supply and chip and electronic equipment |
| CN110198075B (en) * | 2019-04-26 | 2021-03-19 | 漳州科华技术有限责任公司 | Redundant backup power supply, chip and electronic equipment |
| CN110970992A (en) * | 2019-11-01 | 2020-04-07 | 许继电源有限公司 | Dual-power switching device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203504280U (en) | Direct current power supply under-voltage automatic switching system based on microprocessor power supply monitor | |
| CN202363962U (en) | DC power supply device capable of switching into stand-by power source | |
| CN201504100U (en) | Electrified anti-impact circuit | |
| CN201868860U (en) | Overdischarge protective circuit of handheld dust collector | |
| CN101976823B (en) | Undervoltage protection circuit for battery | |
| CN101771338B (en) | Switching power supply module with high reliability and low power consumption | |
| CN203596738U (en) | Switch power supply output overvoltage protection circuit | |
| CN105356736A (en) | Laser power supply storage energy discharge system | |
| CN201341015Y (en) | Overvoltage protector for self excited generator | |
| CN204835509U (en) | Hold battery under voltage protection circuit | |
| CN103414165A (en) | Storage battery discharge protection device | |
| CN101719687A (en) | Uninterrupted direct current (DC) power supply system | |
| CN208581052U (en) | Relay driving control circuit and its manufactured photovoltaic energy storage inverter | |
| CN209282922U (en) | A kind of battery and Switching Power Supply are powered automatic switch-over circuit | |
| CN2606978Y (en) | Protective circuit for preventing battery group from over discharging | |
| CN202564137U (en) | Starting circuit module | |
| CN204290392U (en) | Reset control circuit under a kind of battery | |
| CN105955009A (en) | Power supply circuit and intelligent bracelet of real-time clock | |
| CN103457316B (en) | Load power supply control loop | |
| CN205945120U (en) | Automatic charger of solar energy | |
| CN100547877C (en) | The automatic stop function control circuit of positive and negative combined pulse charge machine | |
| CN205846858U (en) | A kind of uninterrupted voltage-stabilizing power supply system of PLC | |
| CN203406602U (en) | Storage battery discharge protecting apparatus | |
| CN204967417U (en) | Incessant DC power supply system | |
| CN204497726U (en) | A kind of smart jack circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140326 |