CN219678112U - Open-phase protection system of AC fan - Google Patents
Open-phase protection system of AC fan Download PDFInfo
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- CN219678112U CN219678112U CN202320230017.0U CN202320230017U CN219678112U CN 219678112 U CN219678112 U CN 219678112U CN 202320230017 U CN202320230017 U CN 202320230017U CN 219678112 U CN219678112 U CN 219678112U
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- detection circuit
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- 238000001514 detection method Methods 0.000 claims abstract description 44
- 238000010586 diagram Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The utility model provides a phase-failure protection system of an AC fan, which comprises a current detection circuit, a main control module, a phase-failure display circuit and a terminal; the current detection circuit is connected with an alternating current power supply, and the open-phase display circuit and the main control module are connected with the current detection circuit; the main control module is communicated with the terminal, and the terminal is communicated with a corresponding equipment controller. According to the utility model, the three-phase current of the power supply circuit of the fan is obtained through the current detection circuit, and on one hand, the three-phase current is displayed through the open-phase display circuit, so that an intuitive working state is provided for technicians; on the other hand, when the phase failure occurs, the corresponding failure information can be transmitted to the terminal through the main control module, and the corresponding equipment is controlled by the terminal to respond in time, so that the fan is protected, and meanwhile, the damage to the equipment is avoided.
Description
Technical Field
The utility model relates to the field of AC fans, in particular to a phase-failure protection system of an AC fan.
Background
The AC fan is widely used in industries such as industrial ventilation, high-power equipment, and heat dissipation systems of energy storage equipment due to high reliability and low cost. In order to ensure reliable operation of the AC fan, protection devices such as a phase-loss protector, an AC contactor, a control switch and the like are required to be added at a power input end of the fan, so that the AC fan is prevented from being damaged when a phase-loss fault occurs, but the protection devices such as the phase-loss protector, the AC contactor, the control switch and the like are difficult to install simultaneously due to the limitation of the structural space of the device when the AC fan is actually applied, such as the actual use of energy storage charging and discharging equipment.
In addition, once the open-phase fault occurs, the fan can be effectively protected, but equipment using the fan can be damaged due to the fact that the fan stops working and heat is rapidly concentrated and rises.
Disclosure of Invention
In order to solve the problems, the utility model provides a phase-failure protection system of an AC fan.
The main content of the utility model comprises:
a phase-failure protection system of an AC fan comprises a control main board and a terminal; the corresponding equipment controller is connected with the control main board through the terminal; the control main board comprises a current detection circuit, a main control module and a phase-failure display circuit; the current detection circuit is connected with an alternating current power supply, and the open-phase display circuit and the main control module are connected with the current detection circuit; and the main control module is communicated with the terminal.
Preferably, the current detection circuit comprises three single-phase detection units, the single-phase detection units comprise a voltage transformer and a rectifier bridge, the rectifier bridge is connected to the secondary side of the voltage transformer, and an alternating current power supply is coupled with the primary side of the voltage transformer; the phase failure display circuit and the main control module are connected to the output end of the rectifier bridge.
Preferably, the open-phase display circuit comprises three single-phase display units, and the three single-phase display units are respectively connected with the corresponding unidirectional detection units.
Preferably, the single-phase display unit comprises a display triode, a current limiting resistor, a pull-down resistor, a pull-up resistor and a light emitting diode; one end of the current limiting resistor is connected with the output end of the rectifier bridge, the other end of the current limiting resistor is connected with the base electrode of the display triode, the collector electrode of the display triode is connected with a pull-up power supply through the pull-up resistor, the emitter electrode of the display triode is connected with the positive electrode of the light emitting diode, and the negative electrode of the light emitting diode is grounded; the pull-down resistor is connected between the base electrode and the emitter electrode of the display triode.
Preferably, the main control module comprises a fault detection circuit, an alarm switch and a communication unit; the fault detection circuit is connected with the output end of the rectifier bridge, and the communication unit is connected with the fault detection circuit through the alarm switch.
Preferably, the fault detection circuit comprises three single-phase acquisition units, a fault operational amplifier and a fault triode; the input end of the single-phase acquisition unit is connected with the corresponding single-phase detection unit; the output ends of the three single-phase acquisition units are connected with the input ends of the fault operational amplifier, the output ends of the fault operational amplifier are connected with the base electrode of the fault triode, the collector electrode of the fault triode is connected with the alarm switch, and the emitter electrode of the fault triode is grounded.
Preferably, the single-phase acquisition unit comprises an acquisition operational amplifier, the forward input end of the acquisition operational amplifier is connected with the corresponding single-phase detection unit, the reverse input end of the acquisition operational amplifier is connected with the reverse input end of the fault operational amplifier, and the output end of the acquisition operational amplifier is connected with the forward input end of the fault operational amplifier; and the positive input end of the fault operational amplifier is connected with a pull-up power supply through a fault pull-up resistor.
Preferably, the communication unit comprises one or more of a wireless network card, a 4G/5G module and an NB-IOT module.
The utility model has the beneficial effects that: the utility model provides a phase-loss protection system of an AC fan, which is characterized in that three-phase current of a power supply circuit of the fan is obtained through a current detection circuit, and on one hand, the three-phase current is displayed through a phase-loss display circuit, so that an intuitive working state is provided for technicians; on the other hand, when the phase failure occurs, the corresponding failure information can be transmitted to the terminal through the main control module, and the corresponding equipment is controlled by the terminal to respond in time, so that the fan is protected, and meanwhile, the damage to the equipment is avoided.
Drawings
FIG. 1 is a functional block diagram of the present utility model;
FIG. 2 is a circuit diagram of a control motherboard;
fig. 3 is a circuit diagram of a phase loss display circuit.
Detailed Description
The technical scheme protected by the utility model is specifically described below with reference to the accompanying drawings.
Please refer to fig. 1 to 3. The utility model provides a phase-failure protection system of an AC fan, which comprises a control main board and a terminal; the corresponding equipment controller is connected with the control main board through the terminal; when the phase failure occurs, the control main board can communicate with the terminal through the network, the terminal transmits a failure signal to the corresponding equipment controller, and the equipment controller makes a corresponding response to avoid damage to equipment; meanwhile, the control main board can display corresponding open-phase faults so as to help field technicians to quickly identify faults and make emergency treatment in time.
Specifically, the control main board includes a current detection circuit, a main control module 20, and a phase-failure display circuit; the current detection circuit is connected with an alternating current power supply and can acquire three-phase current of the alternating current power supply, and the open-phase display circuit and the main control module are connected with the current detection circuit; the main control module is used for communicating with the terminal.
In one embodiment, the current detection circuit comprises three single-phase detection units 10, wherein the single-phase detection units 10 comprise voltage transformers (CS 1, CS2 and CS 3) and a rectifier bridge 100, and specifically, the rectifier bridge 100 is connected to the secondary side of the voltage transformers, and an alternating current power supply is coupled to the primary side of the voltage transformers; the phase failure display circuit and the main control module are connected to the output end of the rectifier bridge.
Further, as shown in fig. 3, the open-phase display circuit includes three single-phase display units, and the three single-phase display units are respectively connected with the corresponding unidirectional detection units. Further, the unidirectional display unit is described in detail below by taking the first phase as an example, and as shown in the leftmost circuit diagram of fig. 3, the unidirectional display unit includes a display triode Q1, a current limiting resistor R17, a pull-down resistor R18, a pull-up resistor R19, and a light emitting diode LED1; one end of the current limiting resistor R17 is connected with the output end of the rectifier bridge 100, the other end of the current limiting resistor R17 is connected with the base electrode of the display triode Q1, the collector electrode of the display triode Q1 is connected with a pull-up power supply VCC through the pull-up resistor R19, the emitter electrode of the display triode Q1 is connected with the positive electrode of the light emitting diode LED1, and the negative electrode of the light emitting diode LED1 is grounded; the pull-down resistor R18 is connected between the base and emitter of the display transistor Q1.
And the main control module 20 includes a fault detection circuit, an alarm switch RY1, and a communication unit; preferably, the communication unit comprises one or more of a wireless network card, a 4G/5G module and an NB-IOT module.
The fault detection circuit is connected with the output end of the rectifier bridge, and the communication unit is connected with the fault detection circuit through the alarm switch RY 1. Specifically, the fault detection circuit comprises three single-phase acquisition units, a fault operational amplifier U1B and a fault triode Q4; the input end of the single-phase acquisition unit is connected with the corresponding single-phase detection unit; the output ends of the three single-phase acquisition units are connected with the input end of the fault operational amplifier U1B, the output end of the fault operational amplifier U1B is connected with the base electrode of the fault triode Q4, the collector electrode of the fault triode Q4 is connected with the alarm switch RY1, and the emitter electrode of the fault triode Q4 is grounded.
In one embodiment, the single-phase acquisition unit includes an acquisition op-amp U1A, U1C, U D, the positive input end of the acquisition op-amp U1A, U1C, U D is connected to the corresponding single-phase detection unit, the negative input end thereof is connected to the negative input end of the fault op-amp U1B, and the output end thereof is connected to the positive input end of the fault op-amp U1B; the positive input end of the fault operational amplifier U1B is connected with a pull-up power supply VCC through a fault pull-up resistor R11. When the detected phase current is smaller than a set threshold value (Vref), the phase failure is judged to occur, the communication unit is communicated with the terminal by controlling the communication of the alarm switch RY1, so that failure information is transmitted to the equipment controller, and the equipment controller controls equipment to perform corresponding treatment, so that damage to the equipment is avoided.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.
Claims (9)
1. The open-phase protection system of the AC fan is characterized by comprising a control main board and a terminal; the corresponding equipment controller is connected with the control main board through the terminal; the control main board comprises a current detection circuit, a main control module and a phase-failure display circuit; the current detection circuit is connected with an alternating current power supply, and the open-phase display circuit and the main control module are connected with the current detection circuit; and the main control module is communicated with the terminal.
2. The system of claim 1, wherein the current detection circuit comprises three single-phase detection units, the single-phase detection units comprise a voltage transformer and a rectifier bridge, the rectifier bridge is connected to the secondary side of the voltage transformer, and an AC power supply is coupled to the primary side of the voltage transformer; the phase failure display circuit and the main control module are connected to the output end of the rectifier bridge.
3. The system of claim 2, wherein the phase loss display circuit comprises three single-phase display units, each of the three single-phase display units being connected to a corresponding one-way detection unit.
4. The system of claim 3, wherein the single-phase display unit comprises a display transistor, a current limiting resistor, a pull-down resistor, a pull-up resistor, and a light emitting diode; one end of the current limiting resistor is connected with the output end of the rectifier bridge, the other end of the current limiting resistor is connected with the base electrode of the display triode, the collector electrode of the display triode is connected with a pull-up power supply through the pull-up resistor, the emitter electrode of the display triode is connected with the positive electrode of the light emitting diode, and the negative electrode of the light emitting diode is grounded; the pull-down resistor is connected between the base electrode and the emitter electrode of the display triode.
5. The system of claim 4, wherein the three leds are different in color.
6. The system of claim 2, wherein the main control module comprises a fault detection circuit, an alarm switch and a communication unit; the fault detection circuit is connected with the output end of the rectifier bridge, and the communication unit is connected with the fault detection circuit through the alarm switch.
7. The system of claim 6, wherein the fault detection circuit comprises three single-phase acquisition units, a fault op-amp and a fault triode; the input end of the single-phase acquisition unit is connected with the corresponding single-phase detection unit; the output ends of the three single-phase acquisition units are connected with the input ends of the fault operational amplifier, the output ends of the fault operational amplifier are connected with the base electrode of the fault triode, the collector electrode of the fault triode is connected with the alarm switch, and the emitter electrode of the fault triode is grounded.
8. The system of claim 7, wherein the single-phase collection unit comprises a collection op-amp, the positive input end of the collection op-amp is connected with the corresponding single-phase detection unit, the negative input end of the collection op-amp is connected with the negative input end of the fault op-amp, and the output end of the collection op-amp is connected with the positive input end of the fault op-amp; and the positive input end of the fault operational amplifier is connected with a pull-up power supply through a fault pull-up resistor.
9. The system of claim 6, wherein the communication unit comprises one or more of a wireless network card, a 4G/5G module, and an NB-IOT module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320230017.0U CN219678112U (en) | 2023-02-16 | 2023-02-16 | Open-phase protection system of AC fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320230017.0U CN219678112U (en) | 2023-02-16 | 2023-02-16 | Open-phase protection system of AC fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219678112U true CN219678112U (en) | 2023-09-12 |
Family
ID=87895013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320230017.0U Active CN219678112U (en) | 2023-02-16 | 2023-02-16 | Open-phase protection system of AC fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219678112U (en) |
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2023
- 2023-02-16 CN CN202320230017.0U patent/CN219678112U/en active Active
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