CN209659001U - A kind of automatic switching circuit of low-voltage electrical apparatus backup power source - Google Patents
A kind of automatic switching circuit of low-voltage electrical apparatus backup power source Download PDFInfo
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- CN209659001U CN209659001U CN201920494775.7U CN201920494775U CN209659001U CN 209659001 U CN209659001 U CN 209659001U CN 201920494775 U CN201920494775 U CN 201920494775U CN 209659001 U CN209659001 U CN 209659001U
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- power source
- low
- circuit
- backup power
- electrical apparatus
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- 239000004065 semiconductor Substances 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009977 dual effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- 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
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- 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
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- Stand-By Power Supply Arrangements (AREA)
Abstract
The utility model relates to a kind of automatic switching circuits of low-voltage electrical apparatus backup power source, the automatic switchover between power supply and backup power source is often used for realizing low-voltage electrical apparatus, the power output end of the circuit is connect with low-voltage electrical apparatus, including partial pressure sub-circuit and switch sub-circuit, the switch sub-circuit includes metal-oxide-semiconductor, the metal-oxide-semiconductor source electrode is connect with backup power source, grid is connect with partial pressure sub-circuit, drain electrode is connect with power output end, and the common power supply is connect with partial pressure sub-circuit and power output end respectively.Compared with prior art, the utility model have automatic switching do not power off, low power consumption and other advantages.
Description
Technical field
The utility model relates to power supplys to switch field, more particularly, to a kind of automatic switching electricity of low-voltage electrical apparatus backup power source
Road.
Background technique
Power supply switching is very widely used, arrives power grid networking greatly, small to arrive power distribution cabinet distribution, household stand-by generator switching etc.
There is power supply switch circuit.
In the circuit of low pressure, common double break relay can realize the conversion of dual power supply, and principle is as follows: when
When the road A power supply disconnects, relay position is as shown in Figure 1, the road B power supply is powered to electrical appliance；When the road A is powered, relay coil
It is attracted switch, the road A power supply is connected powers to electrical appliance.Relay needs the time in disconnection and contact, it may occur that of short duration power-off
Phenomenon, and relay coil needs energy to maintain operating current when being attracted, system will increase energy consumption in power supply.
In conclusion the conversion circuit of existing low-voltage electrical apparatus has following defects that
1) relay commonly use switch between spare when, will cause of short duration power-off, it is of short duration if rear class power is larger
Power-off can produce bigger effect rear class, it is therefore desirable to increase a large capacity storage capacitor, so that device volume and cost phase
It should increase；
2) relay coil, which keeps being attracted, needs to consume electric energy, increases system energy consumption, if system is storage battery power supply or right
It is higher to save power requirements, energy-efficient effect is then unable to reach using traditional relay circuit；
3) two-way switching relay price is higher, due to being mechanism that electromagnetic force is attracted, coil plus magnetic core etc., volume compared with
Greatly, it is integrated to be unfavorable for miniaturization.
Utility model content
The purpose of this utility model is exactly to provide a kind of low-voltage electrical apparatus to overcome the problems of the above-mentioned prior art
The automatic switching circuit of backup power source.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of automatic switching circuit of low-voltage electrical apparatus backup power source, often uses power supply and backup power source for realizing low-voltage electrical apparatus
Between automatic switchover, the power output end of the circuit connect with low-voltage electrical apparatus, including partial pressure sub-circuit and switch sub-circuit, institute
The switch sub-circuit stated includes metal-oxide-semiconductor, and the metal-oxide-semiconductor source electrode is connect with backup power source, and grid is connect with partial pressure sub-circuit, is leaked
Pole is connect with power output end, and the common power supply is connect with partial pressure sub-circuit and power output end respectively.
The partial pressure sub-circuit includes first resistor and second resistance, and the common power supply passes sequentially through first resistor
It is grounded with after second resistance, the metal-oxide-semiconductor grid is connected between first resistor and second resistance.
The automatic switching circuit of the low-voltage electrical apparatus backup power source further includes the first rectifier diode and the second rectifier diode,
The first rectifier diode anode is connect with common power supply, and cathode is connect with power output end, second rectification two
Pole pipe anode and metal-oxide-semiconductor drain electrode connect, and cathode is connect with power output end.
The common power supply and backup power source are 24V DC power supply.
The automatic switching circuit of the low-voltage electrical apparatus backup power source further includes capacitor, and the capacitor setting is defeated in power supply
Between outlet and ground.
The metal-oxide-semiconductor is P-channel metal-oxide-semiconductor.
When common supply voltage is normal voltage, metal-oxide-semiconductor is in off state, and power output end is only supplied by common power supply
Electricity；When common supply voltage lower than normal voltage and is higher than threshold voltage, and backup power source voltage is normal voltage, metal-oxide-semiconductor
In half on state, power output end is powered jointly by common power supply and backup power source；When common supply voltage is lower than threshold value
Voltage, and backup power source voltage be normal voltage when, metal-oxide-semiconductor is in fully on state, and power output end is only by backup power source
Power supply.
Compared with prior art, the utility model has the advantage that
1) automatic switching does not power off: common power supply and standby electricity switching interval have transition stage, which is in half
On state, common power supply and backup power source are powered jointly, have the of short duration variation of voltage in the process, but not lead to power-off etc.
The occurrence of, protect rear class electrical appliance；
2) low energy consumption: the utility model controls the switching of common power supply and backup power source using metal-oxide-semiconductor, and MOS belongs to voltage
Driving element, as long as grid grade has voltage, energy switched conductive and off state, compared with the relay of electric current driving, significantly
Reduce power consumption, reaches energy-efficient effect；
3) small in size, at low cost: the utility model circuit includes two resistance, two diodes, a metal-oxide-semiconductor and one
Capacitor, compared with traditional relay, volume reduces, and it is integrated to be conducive to miniaturization, and each component is cheap, cost drop
It is low.
Detailed description of the invention
Fig. 1 is double change-over contact point relay dual power supply conversion circuit figures；
Fig. 2 is the utility model backup power source automatic switching circuit figure.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment
The utility model provides a kind of automatic switching circuit of low-voltage electrical apparatus backup power source, as shown in Fig. 2, including common electricity
Source, backup power source, partial pressure sub-circuit, switch sub-circuit, power output end V_OUT, the first rectifier diode D1, the second rectification two
Pole pipe D2 and capacitor C1, switch sub-circuit includes metal-oxide-semiconductor Q1, and metal-oxide-semiconductor Q1 source electrode is connect with backup power source, grid and partial pressure son electricity
Road connection, drain electrode are connect with power output end V_OUT, and partial pressure sub-circuit includes first resistor R1 interconnected and second resistance
R2, first resistor the R1 other end are connect with common power supply and power output end V_OUT respectively, and second resistance R2 is grounded GND, MOS
Pipe Q1 grid is connected between first resistor R1 and second resistance R2.
First rectifier diode D1 anode is connect with first resistor R1, and cathode is connect with power output end V_OUT, and second is whole
It flows diode D2 anode and metal-oxide-semiconductor Q1 drain electrode connects, cathode is connect with power output end V_OUT, and power output end V_OUT passes through
Capacitor C1 is grounded GND.
When common supply voltage is normal voltage, metal-oxide-semiconductor Q1 is in off state, and power output end V_OUT is by commonly using
Power supply power supply；When common supply voltage lower than normal voltage and is higher than threshold voltage, when backup power source voltage is normal voltage,
Metal-oxide-semiconductor Q1 is in half on state, and power output end V_OUT is powered jointly by common power supply and backup power source；When common power supply
Voltage is lower than threshold voltage, and when backup power source voltage is normal voltage, metal-oxide-semiconductor Q1 is in fully on state, power output end
V_OUT is powered by backup power source.
The grid voltage V that threshold voltage is formed after being divided by first resistor R1 and second resistance R2gateValue is metal-oxide-semiconductor Q1
Fully on critical voltage value.The grid voltage that normal voltage is formed after being divided by first resistor R1 and second resistance R2
VgateValue is the critical voltage value of metal-oxide-semiconductor Q1 cut-off.
In the present embodiment, commonly using power supply and backup power source is 24V direct current, and commonly using power supply normal voltage is 24V, first
Resistance R1 and second resistance R2 constitutes the grid of partial pressure sub-circuit driving metal-oxide-semiconductor Q1.
The voltage that grid obtainsWherein VinTo commonly use power input voltage.It is defeated in common power supply
Enter voltage be 0 when, Vgate=0, when common power input voltage is 24V, VgateVoltage is the critical voltage of metal-oxide-semiconductor Q1 cut-off
Value.
The working principle of the utility model is as follows:
When common power supply 24V is normal, under the effect of the partial pressure of first resistor R1 and second resistance R2, grid voltage makes MOS
Pipe Q1 is in off state, first diode D1 conducting, and power output end V_OUT is powered by common power supply 24V.
Common supply voltage is lower than 24V, when backup power source 24V is normal, in the partial pressure of first resistor R1 and second resistance R2
Under effect, grid voltage makes metal-oxide-semiconductor Q1 be in half on state, and first diode D1 and the second diode D2 are both turned on, by normal
It is powered jointly with power supply 24V and backup power source 24V.
Common power supply is reduced to threshold voltage hereinafter, when backup power source 24V is normal, in first resistor R1 and second resistance R2
Partial pressure effect under, metal-oxide-semiconductor Q1 is in fully on state, is powered by backup power source 24V.
Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to
In this, any staff for being familiar with the art within the technical scope disclosed by the utility model, can be readily occurred in various
Equivalent modifications or substitutions, these modifications or substitutions should be covered within the scope of the utility model.Therefore, this is practical
Novel protection scope should be subject to the protection scope in claims.
Claims (6)
1. a kind of automatic switching circuit of low-voltage electrical apparatus backup power source, often used for realizing low-voltage electrical apparatus power supply and backup power source it
Between automatic switchover, the power output end of the circuit connect with low-voltage electrical apparatus, which is characterized in that including partial pressure sub-circuit and switch
Sub-circuit, the switch sub-circuit include metal-oxide-semiconductor (Q1), and the metal-oxide-semiconductor (Q1) source electrode is connect with backup power source, grid with
Divide sub-circuit connection, drain electrode is connect with power output end (V_OUT), the common power supply respectively with divide sub-circuit and electricity
Source output terminal (V_OUT) connection.
2. a kind of automatic switching circuit of low-voltage electrical apparatus backup power source according to claim 1, which is characterized in that described
Partial pressure sub-circuit includes first resistor (R1) and second resistance (R2), the common power supply pass sequentially through first resistor (R1) and
Second resistance (R2) is grounded afterwards, and the metal-oxide-semiconductor (Q1) grid is connected between first resistor (R1) and second resistance (R2).
3. a kind of automatic switching circuit of low-voltage electrical apparatus backup power source according to claim 2, which is characterized in that the low pressure
The automatic switching circuit of electric appliance backup power source further includes the first rectifier diode (D1) and the second rectifier diode (D2), described
First rectifier diode (D1) anode is connect with common power supply, and cathode is connect with power output end (V_OUT), and described second is whole
It flows diode (D2) anode to connect with metal-oxide-semiconductor (Q1) drain electrode, cathode is connect with power output end (V_OUT).
4. a kind of automatic switching circuit of low-voltage electrical apparatus backup power source according to claim 1, which is characterized in that described
Common power supply and backup power source are 24V DC power supply.
5. a kind of automatic switching circuit of low-voltage electrical apparatus backup power source according to claim 1, which is characterized in that described
The automatic switching circuit of low-voltage electrical apparatus backup power source further includes capacitor (C1), and the capacitor (C1) is arranged in power output end
(V_OUT) between ground.
6. a kind of automatic switching circuit of low-voltage electrical apparatus backup power source according to claim 1, which is characterized in that described
Metal-oxide-semiconductor (Q1) is P-channel metal-oxide-semiconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920494775.7U CN209659001U (en) | 2019-04-12 | 2019-04-12 | A kind of automatic switching circuit of low-voltage electrical apparatus backup power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920494775.7U CN209659001U (en) | 2019-04-12 | 2019-04-12 | A kind of automatic switching circuit of low-voltage electrical apparatus backup power source |
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| Publication Number | Publication Date |
|---|---|
| CN209659001U true CN209659001U (en) | 2019-11-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920494775.7U Expired - Fee Related CN209659001U (en) | 2019-04-12 | 2019-04-12 | A kind of automatic switching circuit of low-voltage electrical apparatus backup power source |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111817425A (en) * | 2019-04-12 | 2020-10-23 | 上海亿盟电气自动化技术有限公司 | A kind of automatic switching circuit of low-voltage electrical backup power supply |
-
2019
- 2019-04-12 CN CN201920494775.7U patent/CN209659001U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111817425A (en) * | 2019-04-12 | 2020-10-23 | 上海亿盟电气自动化技术有限公司 | A kind of automatic switching circuit of low-voltage electrical backup power supply |
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191119 |
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| CF01 | Termination of patent right due to non-payment of annual fee |