CN211266587U - Zero-delay power supply switching circuit - Google Patents
Zero-delay power supply switching circuit Download PDFInfo
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- CN211266587U CN211266587U CN202020320178.5U CN202020320178U CN211266587U CN 211266587 U CN211266587 U CN 211266587U CN 202020320178 U CN202020320178 U CN 202020320178U CN 211266587 U CN211266587 U CN 211266587U
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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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Abstract
The utility model relates to a zero delay power supply switching circuit, including power input unit, main power supply switching unit, stand-by power supply switching unit, main control switching unit include diode Q1, relay K1, diode D9, triode Q10 and a plurality of resistance, relay K1 and binding post XS2 are connected to diode Q1, diode D9 and triode Q10's collecting electrode is connected to relay K1, triode Q10's base connecting resistance R21 and resistance R25, resistance R25 ground connection, binding post XS2 and ground connection are connected to triode Q10's projecting pole. The utility model discloses at first realize relay K1's switching among the whole circuit control process, owing to there is ultrafast recovery diode Q1 to last the power supply at the switching in-process, then the relay switches after coming main electricity and is equipped with the electricity and open simultaneously, then one of them is turning off, has just realized the circuit switch that zero delays, and this circuit structure can be ingenious utilizes ultrafast recovery diode parallel connection form, and the reliability is high simultaneously.
Description
Technical Field
The utility model belongs to the circuit field relates to power supply switching circuit, especially a zero delay power supply switching circuit.
Background
The port power supply is combined by an external DC24V switch power supply and a lead-acid battery, the power supply is usually supplied by a commercial power DC24V, and the lead-acid battery of a standby power supply needs to supply power once the commercial power disappears. Since all the devices to be powered are sensitive chip devices, the requirement for the speed of power supply switching is high. The existing switching circuit has certain time delay and cannot meet the requirement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's weak point, provide a safe, reliable zero delay power supply switching circuit.
The utility model provides a technical scheme that technical problem adopted is:
a zero-delay power supply switching circuit comprises a power supply input unit, a main power supply switching unit, a standby power supply switching unit and a main control switching unit, wherein the main control switching unit comprises a diode Q1, a relay K1, a diode D9, a triode Q10 and a plurality of resistors, the diode Q1 is connected with a relay K1 and a wiring terminal XS2, the relay K1 is connected with the collector electrodes of the diode D9 and the triode Q10, the base electrode of the triode Q10 is connected with a resistor R21 and a resistor R25, the resistor R25 is grounded, and the emitter electrode of the triode Q10 is connected with the wiring terminal XS2 and is grounded.
The power input unit includes two terminals XS1 and XS3, which are respectively connected to the DC24V and the battery BT.
The main power switching unit comprises three MOS transistors Q2, Q4 and Q6, a triode Q8 and a plurality of resistors, a connecting terminal XS1 is connected with the three MOS transistors Q2, Q4, Q6 and a resistor R12, the three MOS transistors Q2, Q4 and Q6 are connected with a diode Q1 and a resistor R15 of the main control switching unit, the resistor R15 is connected with a collector of the triode Q8, a base of the triode Q8 is connected with the resistor R23 and the resistor R19, and a resistor R23 is connected with an emitter of the triode Q8 and grounded.
The standby power supply switching unit comprises three MOS tubes Q3, Q5 and Q7, a triode Q9 and a plurality of resistors, a connecting terminal XS3 is connected with the three MOS tubes Q3, Q5, Q7 and a resistor R13, the three MOS tubes Q3, Q5 and Q7 are connected with a diode Q1 and a resistor R16 of the main control switching unit, the resistor R16 is connected with a collector of the triode Q9, a base of the triode Q9 is connected with the resistor R20 and the resistor R24, and a resistor R24 is connected with an emitter of the triode Q9 and grounded.
Moreover, the type of the diode Q1 is MBR 2060.
And the model of the relay K1 is SLA-24VDC-SL-A24 VDC.
The MOS transistors Q2, Q4, Q6, Q3, Q5 and Q7 are all PMOS transistors with the model number NCE60P 50.
And the model of the triodes Q8, Q9 and Q10 is 2N9013-SOT 23.
The utility model has the advantages that:
the utility model discloses at first realize relay K1's switching among the whole circuit control process, owing to there is ultrafast recovery diode Q1 to last the power supply at the switching in-process, then the relay switches after coming main electricity and is equipped with the electricity and open simultaneously, then one of them is turning off, has just realized the circuit switch that zero delays, and this circuit structure can be ingenious utilizes ultrafast recovery diode parallel connection form, and the reliability is high simultaneously.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, which are provided for illustrative purposes only, and are not intended to be limiting, and the scope of the present invention should not be limited thereby.
A zero-delay power supply switching circuit comprises a power supply input unit, a main power supply switching unit, a standby power supply switching unit and a main control switching unit.
The power input unit comprises two wiring terminals XS1 and XS3, wherein the wiring terminal XS1 is connected with a DC24V commercial power supply, and the wiring terminal XS3 is connected with the battery BT.
The main power switching unit comprises three MOS tubes Q2, Q4 and Q6, a triode Q8 and a plurality of resistors, a connecting terminal XS1 is connected with the three MOS tubes Q2, Q4, Q6 and a resistor R12, the three MOS tubes Q2, Q4 and Q6 are connected with a diode Q1 and a resistor R15 of the main control switching unit, the resistor R15 is connected with a collector of the triode Q8, a base of the triode Q8 is connected with the resistor R23 and the resistor R19, and a resistor R23 is connected with an emitter of the triode Q8 and is grounded. The resistor R19 is connected to the power supply MAIN-CTL1 which controls the MAIN power supply.
The main power supply switching unit adopts a high-speed PMOS to switch the main power supply, the PMOS is controlled to be opened at about 10V through effective voltage division of resistors R12 and R15, the PMOS is opened at the fastest speed and the minimum on-resistance, meanwhile, due to the adoption of switching of a triode and the PMOS, the opening and closing speeds are in ns level, the opening and closing speeds are greatly accelerated, and meanwhile, if the outside is abnormal, the PMOS can be closed at the fastest speed to realize protection.
The standby power supply switching unit realizes high-speed on and off operations for standby power supply, as well as the main power supply switching unit.
The standby power supply switching unit comprises three MOS tubes Q3, Q5 and Q7, a triode Q9 and a plurality of resistors, a connecting terminal XS3 is connected with the three MOS tubes Q3, Q5, Q7 and a resistor R13, the three MOS tubes Q3, Q5 and Q7 are connected with a diode Q1 and a resistor R16 of the main control switching unit, the resistor R16 is connected with a collector of the triode Q9, a base of the triode Q9 is connected with the resistor R20 and the resistor R24, and a resistor R24 is connected with an emitter of the triode Q9 and is grounded. The resistor R20 is connected with a power supply BATT-CTL1 for controlling the standby power supply.
The master control switching unit comprises a diode Q1, a relay K1, a diode D9, a triode Q10 and a plurality of resistors, wherein the diode Q1 is connected with a relay K1 and a wiring terminal XS2, the relay K1 is connected with collectors of the diode D9 and a triode Q10, a base of the triode Q10 is connected with a resistor R21 and a resistor R25, the resistor R25 is grounded, an emitter of the triode Q10 is connected with the wiring terminal XS2 and is grounded, and the resistor R21 is connected with a power supply MAIN-CUT1 which controls external output.
The main control switching unit adopts the relay K1 which switches for 20ms at the fastest time to select the current power supply in a sorting mode, and meanwhile, the advantage of adopting a large-capacity relay is that the passing of large current can be realized. However, the purpose of rapidness cannot be achieved within 20ms of the switching process, so that the circuit skillfully adopts the ultra-fast recovery diode Q1 to ensure the smoothness of output in the relay switching process, and thus, external continuous output can be kept in the vacuum process of relay switching. In case the relay switches after accomplishing because relay on-resistance is very low, and the through current is only 5A, and the voltage drop is less than super diode's voltage drop far away like this, therefore the current is whole not to pass through the diode through relay two, can effectual reduction diode consumption like this, just switches instantaneous use, does not use in other times.
The diode Q1 is of the type MBR 2060. The model of the relay K1 is SLA-24VDC-SL-A24 VDC. MOS tubes Q2, Q4, Q6, Q3, Q5 and Q7 are all PMOS, and the model is NCE60P 50. The model of the triodes Q8, Q9 and Q10 is 2N9013-SOT 23.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many modifications and improvements can be made without departing from the spirit of the present invention, and these modifications and improvements are all within the protection scope of the present invention.
Claims (8)
1. The utility model provides a zero delay power supply switching circuit, includes power input unit, main power supply switching unit, stand-by power supply switching unit, master control switching unit, its characterized in that: the master control switching unit comprises a diode Q1, a relay K1, a diode D9, a triode Q10 and a plurality of resistors, wherein the diode Q1 is connected with a relay K1 and a wiring terminal XS2, the relay K1 is connected with collectors of the diode D9 and a triode Q10, a base of the triode Q10 is connected with a resistor R21 and a resistor R25, the resistor R25 is grounded, and an emitter of the triode Q10 is connected with the wiring terminal XS2 and grounded.
2. The zero-delay power switching circuit of claim 1, wherein: the power input unit comprises two connecting terminals XS1 and XS3 which are respectively connected with a DC24V commercial power and a battery BT.
3. The zero-delay power switching circuit of claim 1, wherein: the main power switching unit comprises three MOS tubes Q2, Q4 and Q6, a triode Q8 and a plurality of resistors, a connecting terminal XS1 is connected with the three MOS tubes Q2, Q4, Q6 and a resistor R12, the three MOS tubes Q2, Q4 and Q6 are connected with a diode Q1 and a resistor R15 of the main control switching unit, the resistor R15 is connected with a collector of the triode Q8, a base of the triode Q8 is connected with the resistor R23 and the resistor R19, and a resistor R23 is connected with an emitter of the triode Q8 and is grounded.
4. The zero-delay power switching circuit of claim 1, wherein: the standby power supply switching unit comprises three MOS tubes Q3, Q5 and Q7, a triode Q9 and a plurality of resistors, a connecting terminal XS3 is connected with the three MOS tubes Q3, Q5, Q7 and a resistor R13, the three MOS tubes Q3, Q5 and Q7 are connected with a diode Q1 and a resistor R16 of the main control switching unit, the resistor R16 is connected with a collector of the triode Q9, a base of the triode Q9 is connected with the resistor R20 and the resistor R24, and a resistor R24 is connected with an emitter of the triode Q9 and is grounded.
5. The zero-delay power switching circuit of claim 1, wherein: the type of the diode Q1 is MBR 2060.
6. The zero-delay power switching circuit of claim 1, wherein: the type of the relay K1 is SLA-24VDC-SL-A24 VDC.
7. The zero-delay power switching circuit of claim 3 or 4, wherein: the MOS tubes Q2, Q4, Q6, Q3, Q5 and Q7 are all PMOS, and the model is NCE60P 50.
8. The zero-delay power switching circuit of claim 1, 3 or 4, wherein: the model of the triodes Q8, Q9 and Q10 is 2N9013-SOT 23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020320178.5U CN211266587U (en) | 2020-03-16 | 2020-03-16 | Zero-delay power supply switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020320178.5U CN211266587U (en) | 2020-03-16 | 2020-03-16 | Zero-delay power supply switching circuit |
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| Publication Number | Publication Date |
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| CN211266587U true CN211266587U (en) | 2020-08-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202020320178.5U Active CN211266587U (en) | 2020-03-16 | 2020-03-16 | Zero-delay power supply switching circuit |
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| CN (1) | CN211266587U (en) |
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2020
- 2020-03-16 CN CN202020320178.5U patent/CN211266587U/en active Active
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