CN220042975U - Surge-proof circuit of uninterrupted power source - Google Patents
Surge-proof circuit of uninterrupted power source Download PDFInfo
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- CN220042975U CN220042975U CN202321615627.9U CN202321615627U CN220042975U CN 220042975 U CN220042975 U CN 220042975U CN 202321615627 U CN202321615627 U CN 202321615627U CN 220042975 U CN220042975 U CN 220042975U
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- 239000003990 capacitor Substances 0.000 claims description 27
- 238000004804 winding Methods 0.000 claims description 12
- 239000003381 stabilizer Substances 0.000 claims description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The utility model relates to the technical field of protection circuits, in particular to an anti-surge circuit of an uninterruptible power supply, which comprises an input unit, a protection unit and a load unit. In the utility model, when the intermittent power supply is started, the trigger module provides power supply voltage for the soft start module, the soft start module limits surge impact current generated when the uninterrupted power supply is started so as to protect normal operation of the uninterrupted power supply and a circuit, and short circuit and open circuit protection of the uninterrupted power supply and the circuit are realized through the short circuit protection module and the open circuit protection module.
Description
Technical Field
The utility model relates to the technical field of protection circuits, in particular to an anti-surge circuit of an uninterruptible power supply.
Background
The uninterrupted power supply is a power supply with an energy storage device, and is mainly used for providing uninterrupted power supply for equipment with high requirements on power stability, and surge current refers to peak current or overload current which is far greater than steady-state current and is generated at the moment of power on or under the condition of abnormal circuit occurrence, so that the uninterrupted power supply is damaged.
For example, CN115313339a relates to a lightning protection and surge protection circuit, the varistor in the prior art is replaced by an inductance of 2-3 microhenries or a milliohm-level resistor, the resistance or the inductance ensures that the residual voltage of the whole protection circuit is lower due to smaller impedance when lightning waves or surges pass, and the normal power frequency voltage lifts the circuit of the protection circuit due to the effect of the resistance or the inductance after the surges disappear, so that the discharge tube is caused to be extinguished and turned off, thereby achieving the purpose of blocking the freewheels, and the space of a PCB board is hardly occupied additionally in application.
In order to avoid circuit damage caused by surge, an anti-surge circuit of an uninterruptible power supply is provided.
Disclosure of Invention
The utility model aims to provide an anti-surge circuit of an uninterruptible power supply, which solves the problems in the background technology.
In order to achieve the above object, the present utility model provides an anti-surge circuit of an uninterruptible power supply, which comprises an input unit, a protection unit and a load unit, wherein the input unit comprises a trigger module and a soft start module, the protection unit comprises a short-circuit protection module and a circuit breaking protection module, the trigger module is connected with the soft start module, the soft start module is connected with the short-circuit protection module and the circuit breaking protection module, and the short-circuit protection module and the circuit breaking protection module are connected with the load unit;
the triggering module is used for providing power supply voltage for the soft starting module, and the soft starting module is used for limiting surge impact current and supplying power for the load unit through the short circuit protection module and the circuit breaking protection module.
As a further improvement of the technical scheme, the trigger module comprises an integrated voltage stabilizer, a steady-state trigger and a zero-crossing trigger circuit.
As a further improvement of the technical proposal, the soft start module comprises thyristors SCR, triodes VT1 and VT2,
the thyristor SCR is connected with a resistor R5 in parallel, the resistor R5 is connected with one end of a main winding of the transformer T1, the resistor R4 is connected with the transformer T1, and the other end of the resistor R4 is connected with diodes D1 and D2;
the base electrode of the triode VT1 is connected with a capacitor C1 and connected with resistors R1 and R2 in parallel, the resistor R1 is connected with a diode D5 and D6, the diode D5 is connected with a diode D3, the other end of the diode D1 is connected with the trigger module in parallel, the diode D6 is connected with a diode D4, the other end of the diode D2 is connected with the trigger module in parallel, the capacitor C1 is connected with the other end of the resistor R2, the other end of the diode D3 is connected with the other end of the diode D4 in parallel, the collector electrode of the triode VT1 is connected with the base electrode of the triode VT2 in parallel with the resistor R3, the emitter electrode of the triode VT1 is connected with the other end of the capacitor C1 and connected with the emitter electrode of the triode VT2 in parallel, and the base electrode of the triode VT2 is connected with the other end of the main winding of the transformer T1;
one end of the secondary winding of the transformer T1 is connected with a diode D7, the other end of the secondary winding of the transformer T1 is connected with a diode D8 in parallel, the diode D8 is connected with an inductor L1 in parallel and connected with the other end of the diode D7, and the capacitor C3 is connected with the other end of the inductor L1.
As a further improvement of the technical proposal, the short-circuit protection module comprises a relay J1,
one end of the relay J1 is connected with the diode D1 and the resistor R6 in parallel connection with the capacitor C5, the capacitor C5 is connected with the capacitor C3 in parallel connection with the other end of the resistor R6 and the contact J1-1, the other end of the relay J1 is connected with the other end of the diode VD1 and the resistor R7 in parallel connection with the other end of the capacitor C3, and the resistor R7 is connected with the contact J1-1.
As a further improvement of the technical scheme, the short-circuit protection module further comprises a light emitting diode (LED 1), wherein one end of the light emitting diode (LED 1) is connected with the other end of the relay (J1), and the other end of the light emitting diode (LED 1) is connected with the resistor (R7).
Compared with the prior art, the utility model has the beneficial effects that:
in the anti-surge circuit of the uninterruptible power supply, when the uninterruptible power supply is started, the trigger module provides power supply voltage for the soft start module, the soft start module limits surge impact current generated when the uninterruptible power supply is started so as to protect the normal operation of the uninterruptible power supply and the circuit, and short circuit and open circuit protection of the uninterruptible power supply and the circuit are realized through the short circuit protection module and the open circuit protection module.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present utility model;
FIG. 2 is a circuit diagram of a soft start module of the present utility model;
fig. 3 is a circuit diagram of the short-circuit protection module of the present utility model.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
Referring to fig. 1-3, the present embodiment provides an anti-surge circuit of an uninterruptible power supply, which includes an input unit, a protection unit and a load unit, wherein the input unit includes a trigger module and a soft start module, the protection unit includes a short-circuit protection module and a circuit break protection module, the trigger module is connected with the soft start module, the soft start module is connected with the short-circuit protection module and the circuit break protection module, and the short-circuit protection module and the circuit break protection module are connected with the load unit;
the triggering module provides power supply voltage for the soft starting module, and the soft starting module is used for limiting surge impact current and supplying power for the load unit through the short-circuit protection module and the open-circuit protection module.
Principle of: when the uninterruptible power supply is started, the trigger module provides power supply voltage for the soft start module, the soft start module limits surge impact current generated when the uninterruptible power supply is started so as to protect normal operation of the uninterruptible power supply and a circuit, and short circuit and open circuit protection of the uninterruptible power supply and the circuit are realized through the short circuit protection module and the open circuit protection module.
In order to provide power supply voltage for the soft start module, the trigger module comprises an integrated voltage stabilizer, a steady-state trigger and a zero-crossing trigger circuit, wherein the integrated voltage stabilizer is used for outputting stable power supply voltage for the soft start module, and when the power supply voltage crosses zero, the zero-crossing trigger circuit cuts off output low level, and the steady-state trigger works.
The soft start module comprises thyristors SCR, triodes VT1, VT2,
the thyristor SCR is connected with a resistor R5, the thyristor SCR is connected with a resistor R4 in parallel, the resistor R5 is connected with one end of a main winding of the transformer T1, the resistor R4 is connected with the transformer T1, and the other end of the resistor R4 is connected with diodes D1 and D2;
the base electrode of the triode VT1 is connected with the capacitor C1 and connected with the resistors R1 and R2 in parallel, the resistor R1 is connected with the diodes D5 and D6, the diode D5 is connected with the diode D3, the other end of the diode D1 is connected with the trigger module in parallel, the diode D6 is connected with the diode D4, the other end of the diode D2 is connected with the trigger module in parallel, the capacitor C1 is connected with the other end of the resistor R2, the other end of the diode D3 is connected with the other end of the diode D4 in parallel, the collector electrode of the triode VT1 is connected with the base electrode of the triode VT2 in parallel with the resistor R3, the emitter electrode of the triode VT1 is connected with the other end of the capacitor C1 in parallel with the emitter electrode of the triode VT2, and the base electrode of the triode VT2 is connected with the other end of the main winding of the transformer T1;
one end of the secondary winding of the transformer T1 is connected with a diode D7, the other end of the secondary winding of the transformer T1 is connected with a diode D8 in parallel, the diode D8 is connected with the inductor L1 in parallel, the other end of the diode D7 is connected with the capacitor C3, and the other end of the inductor L1 is connected with the capacitor C3.
In the circuit, diodes D5 and D6, triodes VT1, resistors 2 and C2 form an instantaneous power-off detection circuit, the selection of time constants R2 and C2 is slightly larger than half period, when the input is subjected to instantaneous power-off, a detection signal obtained by the detection circuit turns off a driving signal of a power switch triode VT2, and a gate trigger signal of a thyristor SCR is cut off, so that the protection against impact current is ensured when the power supply is turned on again.
In order to avoid possible short-circuit situations of the load unit, the short-circuit protection module comprises a relay J1,
one end of the relay J1 is connected with the diode D1, the resistor R6 and the capacitor C5 in parallel, the capacitor C5 is connected with the capacitor C3 and the other end of the resistor R6 in parallel, and the contact J1-1, the other end of the relay J1 is connected with the other end of the diode VD1, the resistor R7 and the other end of the capacitor C3 in parallel, and the resistor R7 contacts the contact J1-1.
When the circuit is electrified, the instantaneous pulse charges the capacitor C5 through the relay J1, the relay J1 is electrified and attracted, the load unit is electrified, when the load unit is in short circuit, the working voltage of the relay J1 is reduced, the relay J1 is released, the contact J1-1 is disconnected, and the load unit is powered off, so that the short circuit protection of the circuit is realized.
In order to facilitate the understanding of the cause of the interruption of the circuit, the short-circuit protection module further comprises a light emitting diode LED1, one end of the light emitting diode LED1 is connected with the other end of the relay J1, the other end of the light emitting diode LED1 is connected with a resistor R7,
when the light emitting diode LED1 is lighted, it can be clarified that the current circuit is an interruption caused by a short circuit of the load unit, thereby facilitating quick troubleshooting of the cause of the fault.
When the circuit is electrified, transient pulses charge a capacitor C5 through a relay J1, the relay J1 is electrified and is attracted, a load unit is electrified and works, when the load unit is in short circuit, the working voltage of the relay J1 is reduced, the relay J1 is released, a contact J1-1 is disconnected, the load unit is powered off, and the circuit is protected by short circuit.
The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. An anti-surge circuit of an uninterruptible power supply, which is characterized in that: the device comprises an input unit, a protection unit and a load unit, wherein the input unit comprises a trigger module and a soft start module, the protection unit comprises a short circuit protection module and a circuit breaking protection module, the trigger module is connected with the soft start module, the soft start module is connected with the short circuit protection module and the circuit breaking protection module, and the short circuit protection module and the circuit breaking protection module are connected with the load unit;
the triggering module is used for providing power supply voltage for the soft starting module, and the soft starting module is used for limiting surge impact current and supplying power for the load unit through the short circuit protection module and the circuit breaking protection module.
2. The anti-surge circuit of an uninterruptible power supply of claim 1, wherein: the trigger module comprises an integrated voltage stabilizer, a steady-state trigger and a zero-crossing trigger circuit.
3. The anti-surge circuit of an uninterruptible power supply of claim 1, wherein: the soft start module comprises thyristors SCR, triodes VT1 and VT2,
the thyristor SCR is connected with a resistor R5 in parallel, the resistor R5 is connected with one end of a main winding of the transformer T1, the resistor R4 is connected with the transformer T1, and the other end of the resistor R4 is connected with diodes D1 and D2;
the base electrode of the triode VT1 is connected with a capacitor C1 and connected with resistors R1 and R2 in parallel, the resistor R1 is connected with a diode D5 and D6, the diode D5 is connected with a diode D3, the other end of the diode D1 is connected with the trigger module in parallel, the diode D6 is connected with a diode D4, the other end of the diode D2 is connected with the trigger module in parallel, the capacitor C1 is connected with the other end of the resistor R2, the other end of the diode D3 is connected with the other end of the diode D4 in parallel, the collector electrode of the triode VT1 is connected with the base electrode of the triode VT2 in parallel with the resistor R3, the emitter electrode of the triode VT1 is connected with the other end of the capacitor C1 and connected with the emitter electrode of the triode VT2 in parallel, and the base electrode of the triode VT2 is connected with the other end of the main winding of the transformer T1;
one end of the secondary winding of the transformer T1 is connected with a diode D7, the other end of the secondary winding of the transformer T1 is connected with a diode D8 in parallel, the diode D8 is connected with an inductor L1 in parallel and connected with the other end of the diode D7, and the capacitor C3 is connected with the other end of the inductor L1.
4. The anti-surge circuit of an uninterruptible power supply of claim 3, wherein: the short-circuit protection module comprises a relay J1,
one end of the relay J1 is connected with the diode D1 and the resistor R6 in parallel connection with the capacitor C5, the capacitor C5 is connected with the capacitor C3 in parallel connection with the other end of the resistor R6 and the contact J1-1, the other end of the relay J1 is connected with the other end of the diode VD1 and the resistor R7 in parallel connection with the other end of the capacitor C3, and the resistor R7 is connected with the contact J1-1.
5. The anti-surge circuit of uninterruptible power supply of claim 4, wherein: the short-circuit protection module further comprises a Light Emitting Diode (LED) 1, one end of the LED1 is connected with the other end of the relay J1, and the other end of the LED1 is connected with the resistor R7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321615627.9U CN220042975U (en) | 2023-06-25 | 2023-06-25 | Surge-proof circuit of uninterrupted power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321615627.9U CN220042975U (en) | 2023-06-25 | 2023-06-25 | Surge-proof circuit of uninterrupted power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220042975U true CN220042975U (en) | 2023-11-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321615627.9U Active CN220042975U (en) | 2023-06-25 | 2023-06-25 | Surge-proof circuit of uninterrupted power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220042975U (en) |
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2023
- 2023-06-25 CN CN202321615627.9U patent/CN220042975U/en active Active
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| GR01 | Patent grant | ||
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Effective date of registration: 20241011 Address after: 230000 b-1018, Woye Garden commercial office building, 81 Ganquan Road, Shushan District, Hefei City, Anhui Province Patentee after: HEFEI WISDOM DRAGON MACHINERY DESIGN Co.,Ltd. Country or region after: China Address before: 210017 No. 41 North Wei Road, Jiangsu, Nanjing Patentee before: NANJING XIAOZHUANG University Country or region before: China |