CN220421491U - Uninterrupted power supply circuit of switching power supply and uninterrupted power supply device of switching power supply - Google Patents
Uninterrupted power supply circuit of switching power supply and uninterrupted power supply device of switching power supply Download PDFInfo
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- CN220421491U CN220421491U CN202321987306.1U CN202321987306U CN220421491U CN 220421491 U CN220421491 U CN 220421491U CN 202321987306 U CN202321987306 U CN 202321987306U CN 220421491 U CN220421491 U CN 220421491U
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Abstract
The utility model discloses a switching power supply uninterrupted power supply circuit and a switching power supply uninterrupted power supply device, and relates to the technical field of uninterrupted power supply.A coil of the switching power supply uninterrupted power supply circuit is electrically connected between an anode output end of a transformer and an anode input end of the uninterrupted power supply, the other end of the coil is electrically connected between a cathode output end of the transformer and a cathode input end of the uninterrupted power supply, the anode output end of the uninterrupted power supply is electrically connected with an anode end of a load through a normally closed contact, the cathode output end of the uninterrupted power supply is electrically connected with a cathode output end of the switching power supply, the cathode input end of the switching power supply is grounded, the anode output end of the switching power supply is electrically connected between the anode end of the load and the normally closed contact through a normally open contact, and the cathode end of the load is electrically connected between the cathode output end of the uninterrupted power supply and the cathode output end of the switching power supply; the utility model can meet the operation of circuits with less load in the double power supply switching process or under the condition of frequent power failure, ensure that the load can normally record data and keep uninterrupted power supply for a short time.
Description
Technical Field
The utility model relates to the technical field of uninterruptible power supply, in particular to a uninterruptible power supply circuit of a switching power supply and an uninterruptible power supply device of the switching power supply.
Background
Under the condition of frequent power failure, the main power supply and dual power supply circuit can be frequently switched, so that the main controller equipment can be frequently restarted due to power interruption, and the service life of the main controller equipment is shortened. The circuit structure of the main power supply double-power supply circuit in the prior art is complex, the cost is high, and the maintenance is troublesome when faults occur. In addition, the main power supply and dual power supply circuit in the prior art adopts a software programming control mode to realize uninterrupted switching of power supply of a main power supply and a slave power supply as main power supply, has poorer reliability than hardware switching, and cannot meet the requirement of high-reliability power supply.
Disclosure of Invention
The utility model aims to provide a switching power supply uninterrupted power supply circuit and a switching power supply uninterrupted power supply device, which can meet the operation of a circuit with less load in the process of double power supply switching or under the condition of frequent power failure, ensure that the load can normally record data and can maintain uninterrupted power supply for a short time.
In order to achieve the above purpose, the utility model discloses a switching power supply uninterruptible power supply circuit, which comprises a transformer, a switching power supply, a relay and an uninterruptible power supply, wherein the relay comprises a coil, normally closed contacts and normally open contacts, external alternating current is respectively and electrically connected with an input end of the transformer and an input end of the switching power supply (the input end of the switching power supply comprises an L/N wire), an anode output end of the transformer is electrically connected with an anode input end of the uninterruptible power supply, a cathode output end of the transformer is electrically connected with a cathode input end of the uninterruptible power supply, one end of the coil is electrically connected between the anode output end of the transformer and the anode input end of the uninterruptible power supply, the other end of the coil is electrically connected between the cathode output end of the transformer and the cathode input end of the uninterruptible power supply, the anode output end of the uninterruptible power supply is electrically connected with an anode end of a load through the normally closed contacts, the cathode output end of the switching power supply is electrically connected with a cathode output end of the switching power supply, and a grounding protection end of the switching power supply is electrically connected between the anode output end of the normally closed contacts and the anode output end of the switching power supply.
Compared with the prior art, one end of the coil is electrically connected between the positive electrode output end of the transformer and the positive electrode input end of the uninterrupted power supply, the other end of the coil is electrically connected between the negative electrode output end of the transformer and the negative electrode input end of the uninterrupted power supply, the positive electrode output end of the uninterrupted power supply is electrically connected with the positive electrode end of a load through the normally closed contact, the negative electrode output end of the uninterrupted power supply is electrically connected with the negative electrode output end of the switching power supply, the negative electrode input end of the switching power supply is grounded, the positive electrode output end of the switching power supply is electrically connected between the positive electrode output end of the load and the negative electrode output end of the switching power supply through the normally open contact, and the circuit operation with less load can be met under the condition of double power supply switching or frequent power failure, the normal data recording of the load can be ensured, and short-time uninterrupted power supply can be maintained.
Preferably, the uninterruptible power supply comprises a supercapacitor controller and a supercapacitor, the positive electrode output end of the transformer is electrically connected with the positive electrode input end of the supercapacitor controller, the negative electrode output end of the transformer is electrically connected with the negative electrode input end of the supercapacitor controller, one end of the coil is electrically connected between the positive electrode output end of the transformer and the positive electrode input end of the supercapacitor controller, the other end of the coil is electrically connected between the negative electrode output end of the transformer and the negative electrode input end of the supercapacitor controller, the positive electrode output end of the supercapacitor controller is electrically connected with the positive electrode end of the load through the normally closed contact, the negative electrode output end of the supercapacitor controller is electrically connected with the negative electrode output end of the switching power supply, and the supercapacitor controller is also electrically connected with the supercapacitor and is used for carrying out charge and discharge management on the supercapacitor.
Preferably, a battery management chip is arranged in the super capacitor controller, and the super capacitor controller limits the super capacitor to stop discharging when the super capacitor discharges to a discharge voltage threshold value.
Preferably, the uninterrupted power supply circuit of the switching power supply further comprises a first protection unit, and the first protection unit is connected in series between the positive electrode end of the load and the normally closed contact.
Preferably, the uninterruptible power supply circuit of the switching power supply further comprises a second insurance unit, and the second insurance unit is connected in series between the positive electrode output end of the transformer and the positive electrode input end of the uninterruptible power supply.
Specifically, the first safety unit and the second safety unit are both fuses.
Preferably, the ac input voltage of the switching power supply is 220V, and the dc output voltage is 24V.
Preferably, the external alternating current is an alternating current with the voltage of 220V and the frequency of 50 Hz.
Preferably, the uninterruptible power supply is a storage battery.
Correspondingly, the utility model also discloses a switching power supply uninterrupted power supply device which comprises a load and the switching power supply uninterrupted power supply circuit, wherein the load comprises a control unit and a display unit, the positive electrode output end of the super capacitor controller is electrically connected with the positive electrode end of the control unit and the positive electrode end of the display unit through a normally-closed contact of a relay, the positive electrode output end of the switching power supply is respectively electrically connected between the positive electrode end of the control unit and the normally-closed contact and between the positive electrode end of the display unit and the normally-closed contact through a normally-open contact of the relay, and the control unit is in communication connection with the display unit.
Drawings
Fig. 1 is a circuit diagram of a switching power supply uninterruptible power supply of the present utility model.
Detailed Description
In order to describe the technical content, the constructional features, the achieved objects and effects of the present utility model in detail, the following description is made in connection with the embodiments and the accompanying drawings.
Referring to fig. 1, the uninterruptible power supply device for a switching power supply of the present embodiment includes a uninterruptible power supply circuit 100 for a switching power supply and a load 200, where the uninterruptible power supply circuit 100 for a switching power supply includes a transformer 10, a switching power supply 20, a relay and an uninterruptible power supply 40, the relay includes a coil 31, a normally closed contact 32 and a normally open contact 33, and when the coil 31 is energized, the normally closed contact 32 is opened and the normally open contact 33 is closed; when the coil 31 is de-energized, the normally closed contact 32 remains closed and the normally open contact 33 remains open, preferably the relay is an interlock relay. Of course, in other preferred forms, the relay may be a conventional relay.
The external alternating current is electrically connected to the input of the transformer 10 and the input of the switching power supply 20, respectively, wherein the input of the switching power supply 20 comprises an L/N line. Preferably, the external alternating current is mains electricity, which is an alternating current with a voltage of 220V and a frequency of 50 Hz.
The positive output end of the transformer 10 is electrically connected to the positive input end of the uninterruptible power supply 40, and the negative output end of the transformer 10 is electrically connected to the negative input end of the uninterruptible power supply 40.
One end of the coil 31 is electrically connected between the positive output terminal of the transformer 10 and the positive input terminal of the uninterruptible power supply 40, and the other end of the coil 31 is electrically connected between the negative output terminal of the transformer 10 and the negative input terminal of the uninterruptible power supply 40.
The positive output terminal of the uninterruptible power supply 40 is electrically connected with the positive terminal of the load 200 through the normally closed contact 32, and the negative output terminal of the uninterruptible power supply 40 is electrically connected with the negative output terminal of the switching power supply 20.
The ground protection terminal of the switching power supply 20 is grounded, and the positive output terminal of the switching power supply 20 is electrically connected between the positive terminal of the load 200 and the normally closed contact 32 through the normally open contact 33.
The negative terminal of the load 200 is electrically connected between the negative output terminal of the ups 40 and the negative output terminal of the switching power supply 20.
Preferably, the ups 40 includes a supercapacitor controller 41 and a supercapacitor 42, and at this time, the specific circuit connection relationships between the supercapacitor controller 41 and the supercapacitor 42 in the ups 100 are as follows: the positive pole output of transformer 10 is connected the positive pole input of super capacitor controller 41, the negative pole output of transformer 10 is connected the negative pole input of super capacitor controller 41, the one end of coil 31 is connected between the positive pole output of transformer 10 and the positive pole input of super capacitor controller 41 electricity, the other end of coil 31 is connected between the negative pole output of transformer 10 and the negative pole input of super capacitor controller 41 electricity, the positive pole output of super capacitor controller 41 passes through normally closed contact 32 electricity and connects the positive pole of load 200, super capacitor controller 41 negative pole output electricity connects the negative pole output of switching power supply 20, super capacitor controller 41 still electricity connects super capacitor 42, super capacitor controller 41 is used for carrying out charge-discharge management to super capacitor 42.
Preferably, the super capacitor controller 41 has a battery management chip built therein, and the super capacitor controller 41 limits the super capacitor 42 to stop discharging when it discharges to a discharge voltage threshold value, so as to prevent the super capacitor 42 from being damaged due to over-discharge, preferably, the discharge voltage threshold value is 15V.
Preferably, the uninterruptible power supply circuit 100 further includes a first protection unit 50 and a second protection unit 60, the first protection unit 50 is connected in series between the positive terminal of the load 200 and the normally closed contact 32, and the second protection unit 60 is connected in series between the positive output terminal of the transformer 10 and the positive input terminal of the uninterruptible power supply 40. Specifically, the first and second fuse units 50 and 60 are both fuses. Of course, in other preferred embodiments, the first protection unit 50 and the second protection unit 60 may be other protection circuits for preventing overcurrent, overload, and short-circuit.
Preferably, the ac input voltage of the switching power supply 20 is 220V, and the dc output voltage is 24V, so as to meet the power consumption requirement of the load 200.
The load 200 comprises a control unit 201 and a display unit 202, wherein the positive output end of the super capacitor controller 41 is electrically connected with the positive end of the control unit 201 and the positive end of the display unit 202 through a normally-closed contact 32 of a relay, the positive output end of the switching power supply 20 is respectively and electrically connected between the positive end of the control unit 201 and the normally-closed contact 32 and between the positive end of the display unit 202 and the normally-closed contact 32 through a normally-open contact 33 of the relay, and the control unit 201 is in communication connection with the display unit 202.
For example, the power supply voltage of the control unit 201 is 24V, the rated power consumption is 10W, the power supply voltage of the display unit 202 is 24V, and the rated power consumption is 5W, and at this time, the capacity of the super capacitor 42 needs to satisfy the power supply duration of at least 400 seconds at the rated power consumption of 15W and the dc voltage of 24V.
The following describes a control procedure of the uninterruptible power supply device of the switching power supply of this embodiment:
1. when the external alternating current power supply supplies power normally:
1.1, when the transformer 10 is powered on, the coil 31 of the relay acts and is attracted, the normally closed contact 32 is disconnected, and the super capacitor controller 41 only charges the super capacitor 42;
1.2, the switching power supply 20 is powered on, the normally open contact 33 is closed, and the switching power supply 20 supplies power to the control unit 201 and the display unit 202;
2. when the external ac power source is powered off:
2.1, when the transformer 10 is powered off, the coil 31 of the relay is powered off and does not act to keep non-actuation, the normally closed contact 32 is closed, the super capacitor controller 41 controls the super capacitor 42 to discharge, and the uninterruptible power supply 40 supplies power for the control unit 201 and the display unit 202;
2.2, the switching power supply 20 loses power, the normally open contact 33 is opened, and the switching power supply 20 does not work and has no power supply output.
In this embodiment, the ups 40 is a combination of the supercapacitor controller 41 and the supercapacitor 42, and of course, in other embodiments, the ups 40 may be a battery.
Compared with the traditional scheme of adopting an ATS to control the power supply of a storage battery, the switching control time of the relay of the embodiment is only 20ms, the switching control of the ATS needs 200ms, the power-off time period can possibly lead the control unit 201 to be powered off for 100ms and restarted, the switching scheme of the relay avoids the restarting power-off time period, so the automatic switching is more reliable, the super capacitor 42 is charged quickly and has small volume, the super capacitor can be fully charged in a few minutes, and the storage battery needs a few hours, thereby effectively improving the charging efficiency and reducing the whole volume.
Referring to fig. 1, one end of a coil 31 of the present utility model is electrically connected between a positive output end of a transformer 10 and a positive input end of an uninterruptible power supply 40, the other end is electrically connected between a negative output end of the transformer 10 and a negative input end of the uninterruptible power supply 40, the positive output end of the uninterruptible power supply 40 is electrically connected with a positive end of a load 200 through a normally closed contact 32, the negative output end is electrically connected with a negative output end of a switching power supply 20, a ground protection ground of the switching power supply 20 is grounded, the positive output end is electrically connected between the positive end of the load 200 and the normally closed contact 32 through a normally open contact 33, and the negative output end of the load 200 is electrically connected between the negative output end of the uninterruptible power supply 40 and the negative output end of the switching power supply 20.
The foregoing description of the preferred embodiments of the present utility model is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (10)
1. The uninterrupted power supply circuit of a kind of switching power supply, characterized by that: comprises a transformer (10), a switching power supply (20), a relay and an uninterruptible power supply (40), wherein the relay comprises a coil (31), a normally closed contact (32) and a normally open contact (33), external alternating current is respectively and electrically connected with the input end of the transformer (10) and the input end of the switching power supply (20), the positive output end of the transformer (10) is electrically connected with the positive input end of the uninterruptible power supply (40), the negative output end is electrically connected with the negative input end of the uninterruptible power supply (40), one end of the coil (31) is electrically connected between the positive output end of the transformer (10) and the positive input end of the uninterruptible power supply (40), the other end is electrically connected between the negative output end of the transformer (10) and the negative input end of the uninterruptible power supply (40), the positive output end of the uninterruptible power supply (40) is electrically connected with the positive end of a load (200) through the normally closed contact (32), the negative output end is electrically connected with the negative output end of the switching power supply (20), the normally closed contact (20) is grounded, the normally open contact is connected with the positive output end of the load (33), the negative terminal of the load (200) is electrically connected between the negative output terminal of the uninterruptible power supply (40) and the negative output terminal of the switching power supply (20).
2. The switching power supply uninterruptible power supply circuit of claim 1, wherein: the uninterruptible power supply (40) comprises a super capacitor controller (41) and a super capacitor (42), wherein the positive electrode output end of the transformer (10) is electrically connected with the positive electrode input end of the super capacitor controller (41), the negative electrode output end is electrically connected with the negative electrode input end of the super capacitor controller (41), one end of the coil (31) is electrically connected between the positive electrode output end of the transformer (10) and the positive electrode input end of the super capacitor controller (41), the other end of the coil is electrically connected between the negative electrode output end of the transformer (10) and the negative electrode input end of the super capacitor controller (41), the positive electrode output end of the super capacitor controller (41) is electrically connected with the positive electrode end of the load (200) through the normally closed contact (32), the negative electrode output end of the super capacitor controller (41) is electrically connected with the negative electrode output end of the switch power supply (20), and the super capacitor controller (41) is electrically connected with the super capacitor (42) for carrying out charge and discharge management on the super capacitor (42).
3. The switching power supply uninterruptible power supply circuit of claim 2, wherein: the super capacitor controller (41) is internally provided with a battery management chip, and the super capacitor controller (41) limits the super capacitor (42) to stop discharging when the discharge voltage reaches a discharge voltage threshold value.
4. The switching power supply uninterruptible power supply circuit of claim 1, wherein: the device further comprises a first safety unit (50), wherein the first safety unit (50) is connected in series between the positive electrode end of the load (200) and the normally-closed contact (32).
5. The switching power supply uninterruptible power supply circuit of claim 4, wherein: the power supply further comprises a second insurance unit (60), wherein the second insurance unit (60) is connected in series between the positive output end of the transformer (10) and the positive input end of the uninterruptible power supply (40).
6. The switching power supply uninterruptible power supply circuit of claim 5, wherein: the first safety unit (50) and the second safety unit (60) are both fuses.
7. The switching power supply uninterruptible power supply circuit of claim 1, wherein: the alternating current input voltage of the switching power supply (20) is 220V, and the direct current output voltage is 24V.
8. The switching power supply uninterruptible power supply circuit of claim 1, wherein: the external alternating current is 220V alternating current with the frequency of 50 Hz.
9. The switching power supply uninterruptible power supply circuit of claim 1, wherein: the uninterruptible power supply (40) is a storage battery.
10. The utility model provides a switching power supply uninterrupted power source which characterized in that: the uninterrupted power supply circuit (100) of the switching power supply, which comprises a load (200) and any one of claims 2-9, wherein the load (200) comprises a control unit (201) and a display unit (202), the positive electrode output end of a super capacitor controller (41) is electrically connected with the positive electrode end of the control unit (201) and the positive electrode end of the display unit (202) through a normally-closed contact (32) of a relay, the positive electrode output end of the switching power supply (20) is respectively electrically connected between the positive electrode end of the control unit (201) and the normally-closed contact (32) and between the positive electrode end of the display unit (202) and the normally-closed contact (32) through a normally-open contact (33) of the relay, and the control unit (201) is in communication connection with the display unit (202).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321987306.1U CN220421491U (en) | 2023-07-26 | 2023-07-26 | Uninterrupted power supply circuit of switching power supply and uninterrupted power supply device of switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321987306.1U CN220421491U (en) | 2023-07-26 | 2023-07-26 | Uninterrupted power supply circuit of switching power supply and uninterrupted power supply device of switching power supply |
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| Publication Number | Publication Date |
|---|---|
| CN220421491U true CN220421491U (en) | 2024-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321987306.1U Active CN220421491U (en) | 2023-07-26 | 2023-07-26 | Uninterrupted power supply circuit of switching power supply and uninterrupted power supply device of switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220421491U (en) |
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2023
- 2023-07-26 CN CN202321987306.1U patent/CN220421491U/en active Active
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