CN211880305U - Frequency converter circuit and cooling system - Google Patents
Frequency converter circuit and cooling system Download PDFInfo
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- CN211880305U CN211880305U CN202020665324.8U CN202020665324U CN211880305U CN 211880305 U CN211880305 U CN 211880305U CN 202020665324 U CN202020665324 U CN 202020665324U CN 211880305 U CN211880305 U CN 211880305U
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- 238000001816 cooling Methods 0.000 title claims abstract description 88
- 238000006243 chemical reaction Methods 0.000 claims abstract description 75
- 230000005611 electricity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 10
- 238000001914 filtration Methods 0.000 description 10
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The utility model provides a frequency converter circuit, frequency converter circuit includes: the power supply input end is used for being electrically connected with a power frequency power supply; the main circuit comprises a circuit breaker and a frequency conversion module, and the input end of the circuit breaker is electrically connected with the power supply input end; the power supply output end is used for being electrically connected with the cooling device; the interlocking module comprises a first switch and a second switch, the input end of the first switch is electrically connected with the output end of the frequency conversion module, and the input end of the second switch is electrically connected with the power supply input end; the output end of the first switch and the output end of the second switch are respectively electrically connected with the power output end, wherein when the first switch is closed, the second switch is opened, and when the first switch is opened, the second switch is closed. Furthermore, the utility model also provides a cooling system.
Description
Technical Field
The utility model relates to a frequency conversion technology field especially relates to a converter circuit and cooling system.
Background
Large-scale equipment such as a generator set or a motor train tractor and the like can generate huge heat in the operation process, so that the large-scale equipment such as the generator set or the motor train tractor and the like is provided with a cooling fan for heat dissipation. The existing cooling fans are powered by power frequency, namely the rotating speed of the cooling fan is constant. When the speed of the motor car is greater than a certain preset value, the cooling fan enters a high-speed running state and keeps running at a high speed all the time; when the speed of the motor car is less than another preset value, the cooling fan enters a low-speed running state and keeps running at a low speed all the time. However, the existing cooling fan working mode cannot accurately dissipate heat of the motor train tractor, and wastes electric energy.
At present, a converter is introduced into part of the cooling fans, and the operation state of the cooling fans is adjusted by changing the voltage, the frequency and the like of a power supply. However, when the converter is introduced, an additional control system is required, and the circuit system is complicated.
Therefore, the circuit system is a problem to be solved.
SUMMERY OF THE UTILITY MODEL
The utility model provides a converter circuit and cooling system, steerable cooling device carry out frequency conversion work.
In a first aspect, an embodiment of the present invention provides a frequency converter circuit, the frequency converter circuit includes:
the power supply input end is used for being electrically connected with a power frequency power supply;
the main circuit comprises a circuit breaker and a frequency conversion module, and the input end of the circuit breaker is electrically connected with the power supply input end;
the power supply output end is used for being electrically connected with the cooling device;
the interlocking module comprises a first switch and a second switch, the input end of the first switch is electrically connected with the output end of the frequency conversion module, and the input end of the second switch is electrically connected with the power supply input end; the output end of the first switch and the output end of the second switch are respectively electrically connected with the power output end, wherein when the first switch is closed, the second switch is opened, and when the first switch is opened, the second switch is closed.
In a second aspect, embodiments of the present invention provide a cooling system, which includes:
a cooling device for cooling an external apparatus;
the frequency converter is provided with a frequency converter circuit, the frequency converter circuit comprises a power input end, a main circuit, a power output end and an interlocking module, the power input end is electrically connected with a power frequency power supply, the power output end is electrically connected with the cooling device, the main circuit comprises a circuit breaker and a frequency conversion module, the input end of the circuit breaker is electrically connected with the power input end, the interlocking module comprises a first switch and a second switch, the input end of the first switch is electrically connected with the output end of the frequency conversion module, the input end of the second switch is electrically connected with the power input end, the output end of the first switch and the output end of the second switch are respectively electrically connected with the power output end, the interlocking module is used for controlling the cooling device to carry out power frequency work or frequency conversion work, wherein when the first switch is closed, the second switch is open, and when the first switch is open, the second switch is closed;
and the temperature sensor is electrically connected with the frequency conversion module, and when the cooling device works in a frequency conversion mode, the frequency conversion module regulates and controls the cooling device according to the temperature acquired by the temperature sensor.
Above-mentioned converter circuit and cooling system, through the interlocking of first switch and second switch, control cooling device carries out frequency conversion work or power frequency work, and circuit system is simple simultaneously.
Drawings
Fig. 1 is a circuit diagram of a frequency converter circuit provided in an embodiment of the present invention.
Fig. 2 is a schematic diagram of a frequency converter circuit provided in an embodiment of the present invention.
Fig. 3 is a circuit diagram of an interlock module according to an embodiment of the present invention.
Fig. 4 is a schematic connection diagram of the frequency conversion module provided in the embodiment of the present invention.
Fig. 5 is a schematic connection diagram of a cooling system according to an embodiment of the present invention.
Detailed Description
For a clearer and more accurate understanding of the present invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings. Description of drawings the accompanying drawings illustrate examples of embodiments of the present invention, in which like reference numerals refer to like elements. It is to be understood that the drawings are not to scale as the actual practice of the invention, but are for illustrative purposes and are not drawn to scale.
Please refer to fig. 1, fig. 2, fig. 3 and fig. 4, which are a circuit diagram of a converter circuit, a schematic diagram of a converter circuit, a circuit diagram of an interlock module and a connection schematic diagram of a converter module according to an embodiment of the present invention. The frequency converter circuit comprises a power input 10, a main circuit 20, a power output 40, and an interlock module 30. Wherein the power input terminal 10 is used for electrically connecting with a power frequency power supply (not shown), and the power output terminal 40 is used for electrically connecting with a cooling device (not shown). When the frequency converter circuit is electrically connected with the cooling device, the frequency converter circuit can control the cooling device to carry out frequency conversion work. In this embodiment, cooling device is cooling blower, and cooling blower is used for producing the large-scale equipment of a large amount of heats and cooling when functioning for generating set, tractor etc.. In some possible embodiments, the cooling device may also be other devices requiring variable frequency regulation, and will not be described herein.
The main circuit 20 includes a cut-off switch 21, a frequency conversion module 22, and a filtering module 23. The input end of the cut-off switch 21 is electrically connected to the power input end 10, the input end of the filter module 23 is electrically connected to the output end of the cut-off switch 21, and the output end of the filter module 23 is electrically connected to the input end 224 of the frequency conversion module 22. The disconnection switch 21 is used to protect the frequency conversion module 22. Specifically, when the power frequency power supply passing through the frequency conversion module 22 is abnormal, so that the frequency conversion module 22 is overloaded, over-voltage, over-current, and the like, the cut-off switch 21 is automatically turned off, so that the frequency conversion module 22 does not work any more. When the frequency conversion module 22 is in an abnormal condition such as short circuit or overheating, the cut-off switch 21 is also automatically turned off to protect the frequency conversion module 22. In the present embodiment, the cut-off switch 21 is a circuit breaker. The filtering module 23 is used for harmonic filtering. Specifically, when the power frequency power supply enters the frequency converter circuit from the power input terminal 10, it enters the filtering module 23 after passing through the cut-off switch 21. The filtering module 23 performs harmonic filtering on the power frequency power supply to ensure that the quality of the power supply entering the frequency conversion module 22 after passing through the filtering module 23 can meet the requirement. Meanwhile, the filtering module 23 can also filter the harmonic generated when the frequency conversion module 22 controls the cooling device to perform frequency conversion operation, so as to prevent the filtering generated in the frequency conversion process from being transmitted upwards to the power frequency power supply, and ensure that the quality of the power frequency power supply is not affected by the frequency conversion module 22. The frequency conversion module 22 includes an IGBT module 221, a filter capacitor 222, and a control chip 223. When the power frequency power supply enters the frequency conversion module 22 through the filtering module 23, the IGBT module 221 in the frequency conversion module 22 converts the ac power of the power supply into dc power. The filter capacitor 222 filters the dc power rectified by the IGBT module 221. After being filtered by the filter capacitor 222, the quality of the direct current is improved, and the requirement of the cooling device on the quality of the power supply is met. Finally, the control chip 223 converts the dc power into ac power, and outputs the ac power from the output terminal 225 of the frequency conversion module 22.
The interlock module 30 includes a first switch 31 and a second switch 32. Wherein, the input end of the first switch 31 is electrically connected with the output end 225 of the frequency conversion module 22, and the input end of the second switch 32 is electrically connected with the power input end 10. The output terminal of the first switch 31 and the output terminal of the second switch 32 are electrically connected to the power supply output terminal 40, respectively. The interlocking module 30 is used for controlling the cooling device to perform power frequency work or frequency conversion work. Wherein, when the first switch 31 is closed, the second switch 32 is opened; when the first switch 31 is open, the second switch 32 is closed. Specifically, the first switch 31 is used to control the opening and closing of the passage between the inverter module 22 and the cooling device, and when the first switch 31 is closed and the second switch 32 is opened, the cooling device performs the inverter operation. The second switch 32 is used to control the opening and closing of the passage between the commercial power supply and the cooling device, and when the first switch 31 is turned off and the second switch 32 is turned on, the cooling device performs commercial operation.
In the present embodiment, the first switch 31 includes a first normally open contact 311, a first normally closed contact 312, and a first coil 313, and the second switch 32 includes a second normally open contact 321, a second normally closed contact 322, and a second coil 323. The first normally-open contact 311 and the second normally-open contact 321 are relays, respectively, and the first normally-closed contact 312 and the first coil 313, and the second normally-closed contact 322 and the second coil 323 are ac contactors, respectively. Specifically, the first normally open contact 311, the second normally closed contact 322, and the first coil 313 are sequentially connected in series, the second normally open contact 321, the first normally closed contact 312, and the second coil 323 are sequentially connected in series, and the first normally open contact 311 and the second normally open contact 321 are electrically connected with the frequency conversion module 22 respectively. When the power frequency power supply enters the frequency converter circuit, the frequency conversion module 22 outputs a low level to trigger the second normally open contact 321 to be closed, and the second switch 32 is in a conducting state because the first normally closed contact 312 is closed. At this time, the second coil 323 is energized to control the second normally closed contact 322 to open. Since the first normally open contact 311 is also open, the first switch 31 is in an open state. And starting the cooling device at power frequency. Then, the frequency conversion module 22 outputs a high level to trigger the second normally open contact 321 to open and the first normally open contact 311 to close, respectively, so that the second switch 32 is in an open state. When the second switch 32 is open and the second coil 323 is not energized, the second normally closed contact 322 is closed. Since the first normally open contact 311 is closed, the first switch 31 is in a conducting state, and the cooling device performs a variable frequency operation. When the disconnecting switch 21 is turned off, the frequency conversion module 22 outputs a low level to trigger the first normally open contact 311 to be opened and the second normally open contact 321 to be closed, respectively, so that the first switch 31 is in an open state. When the first switch 31 is opened and the first coil 313 is not energized, the first normally closed contact 312 is closed. Since the second normally-open contact 321 and the first normally-closed contact 312 are both closed, the second switch 32 is turned on, and the cooling device operates at power frequency. In some possible embodiments, the manner of triggering the first normally-open contact 311 and the second normally-open contact 321 by the output level of the frequency conversion module 22 is not limited thereto, and will not be described herein again.
The frequency converter circuit further includes a fault indicator light 70, the fault indicator light 70 being electrically connected to the frequency conversion module 22. When the frequency conversion module 22 fails, the fault indicator lamp 70 is turned on. Specifically, when an abnormal condition such as a short circuit or overheating occurs in the inverter module 22 and the inverter operation of the cooling device is not performed, the fault indicator lamp 70 is turned on. The illuminated fault indicator light 70 is used to prompt maintenance on the malfunctioning frequency conversion module 22.
The frequency converter circuit further comprises a temperature sensor 90, the temperature sensor 90 being electrically connected to the frequency conversion module 22. Preferably, the temperature sensor 90 is used to collect the temperature of the equipment to be cooled (not shown). In some possible embodiments, the temperature sensor 90 may also be used to collect the ambient temperature, which is not described herein. The frequency conversion module 22 regulates and controls the cooling device according to the temperature collected by the temperature sensor 90. Specifically, when the collected temperature is high, the frequency conversion module 22 outputs a power supply with high frequency to enable the cooling device to operate at high speed, so as to accelerate the cooling speed of the equipment to be cooled; when the collected temperature is low, the frequency conversion module 22 outputs a power supply with low frequency to enable the cooling device to operate at low speed, and the cooling speed of the equipment to be cooled is reduced. The control chip 223 monitors the collected temperature in real time and regulates and controls the cooling device in real time according to the collected temperature, so that the stepless speed regulation of the cooling device is realized.
The frequency converter circuit further comprises a control panel 80, the control panel 80 being electrically connected to the frequency conversion module 22. The control panel 80 is used for inputting temperature parameters, and the frequency conversion module 22 regulates and controls the cooling device according to the temperature parameters input by the control panel 80. When a fault occurs in the temperature sensor 90 or a problem occurs in the electrical connection between the temperature sensor 90 and the inverter module 22, the temperature parameter may be manually input through the control panel 80. After receiving the input temperature parameter, the control chip 223 controls the cooling device according to the temperature parameter, thereby avoiding that the frequency conversion control cannot be performed on the cooling device due to the problem of the temperature sensor 90.
Please refer to fig. 5, which is a schematic connection diagram of a cooling system 99 according to an embodiment of the present invention. The cooling system 99 includes a cooling device 91, a frequency converter 92, and a temperature sensor 90. Specifically, the cooling device 91 is used to cool the external device 1000. The output terminal of the cooling device 91 is electrically connected to the external apparatus 1000. The frequency converter 92 is provided with a frequency converter circuit (not shown). The input of the frequency converter circuit is electrically connected to the power frequency power supply 2000, and the output of the frequency converter circuit is electrically connected to the input of the cooling device 91. The frequency converter circuit comprises a frequency conversion module and an interlocking module. Wherein the interlock module is used to control the cooling device 92 to perform power frequency operation or variable frequency operation. The temperature sensor 90 is electrically connected to the frequency conversion module. When the cooling device 91 performs frequency conversion, the frequency conversion module regulates and controls the cooling device 91 according to the temperature collected by the temperature sensor 90.
In the above embodiment, regulate and control cooling device through the converter for cooling device can carry out frequency conversion work, and cooling device treats and has saved the electric energy when cooling device carries out accurate cooling. Meanwhile, the whole circuit system is simple and clear. Because first switch and second switch constitute the interlocking module, first normally open contact and second normally open contact wherein all can be controlled by frequency conversion module, then the converter need not the manual opening just can automatic start carry out work. When the frequency conversion module in the frequency converter breaks down, the cooling device can be controlled to work at power frequency through the interlocking module, and the cooling of the equipment to be cooled is ensured to be uninterrupted. Meanwhile, the frequency converter can automatically regulate the speed of the cooling device through the temperature collected by the temperature sensor, and also can receive the temperature parameters input by the control panel to manually regulate the speed of the cooling device, thereby realizing the diversification of control.
It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, to the extent that such modifications and variations fall within the scope of the invention and the equivalent techniques thereof, it is intended that the present invention also encompass such modifications and variations.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the following claims.
Claims (10)
1. A frequency converter circuit, characterized in that the frequency converter circuit comprises:
the power supply input end is used for being electrically connected with a power frequency power supply;
the main circuit comprises a circuit breaker and a frequency conversion module, and the input end of the circuit breaker is electrically connected with the power supply input end;
the power supply output end is used for being electrically connected with the cooling device;
the interlocking module comprises a first switch and a second switch, the input end of the first switch is electrically connected with the output end of the frequency conversion module, and the input end of the second switch is electrically connected with the power supply input end; the output end of the first switch and the output end of the second switch are respectively electrically connected with the power supply output end, wherein when the first switch is closed, the second switch is disconnected; the second switch is closed when the first switch is open.
2. The frequency converter circuit according to claim 1, wherein the main circuit further comprises a filter module, an input of the filter module being electrically connected to an output of the circuit breaker, an output of the filter module being electrically connected to an input of the frequency conversion module.
3. The frequency converter circuit of claim 1, further comprising a temperature sensor electrically connected to the frequency conversion module; and the frequency conversion module regulates and controls the cooling device according to the temperature information acquired by the temperature sensor.
4. The frequency converter circuit of claim 3, further comprising a control panel electrically connected to the frequency conversion module; and the frequency conversion module regulates and controls the cooling device according to the temperature parameters input by the control panel.
5. The frequency converter circuit of claim 1, further comprising a fault indicator light electrically connected to the frequency conversion module; and when the frequency conversion module has a fault, the fault indicator lamp is turned on.
6. The frequency converter circuit of claim 1, wherein the circuit breaker is a circuit breaker; the first switch and the second switch are both alternating current contactors.
7. The frequency converter circuit of claim 6, wherein the first switch comprises a first normally open contact, a first normally closed contact, and a first coil, and the second switch comprises a second normally open contact, a second normally closed contact, and a second coil; first normally open contact second normally closed contact and first coil establish ties in proper order, second normally open contact first normally closed contact and second coil establish ties in proper order, first normally open contact and second normally open contact respectively with the frequency conversion module electricity is connected.
8. A cooling system, characterized in that the cooling system comprises:
a cooling device for cooling an external apparatus;
the frequency converter is provided with a frequency converter circuit, the frequency converter circuit comprises a power input end, a main circuit, a power output end and an interlocking module, the power input end is electrically connected with a power frequency power supply, the power output end is electrically connected with the cooling device, the main circuit comprises a circuit breaker and a frequency conversion module, the input end of the circuit breaker is electrically connected with the power input end, the interlocking module comprises a first switch and a second switch, the input end of the first switch is electrically connected with the output end of the frequency conversion module, the input end of the second switch is electrically connected with the power input end, the output end of the first switch and the output end of the second switch are respectively electrically connected with the power output end, the interlocking module is used for controlling the cooling device to carry out power frequency work or frequency conversion work, wherein when the first switch is closed, the second switch is open, and when the first switch is open, the second switch is closed;
and the temperature sensor is electrically connected with the frequency conversion module, and when the cooling device works in a frequency conversion mode, the frequency conversion module regulates and controls the cooling device according to the temperature acquired by the temperature sensor.
9. The cooling system of claim 8, wherein the inverter circuit further comprises a control panel electrically connected to the inverter module; when the cooling device works in a frequency conversion mode, the frequency conversion module regulates and controls the cooling device according to the temperature parameters input by the control panel.
10. The cooling system of claim 8, wherein the inverter circuit further comprises a fault indicator light, the fault indicator light electrically connected to the inverter module; and when the frequency conversion module has a fault, the fault indicator lamp is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020665324.8U CN211880305U (en) | 2020-04-27 | 2020-04-27 | Frequency converter circuit and cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020665324.8U CN211880305U (en) | 2020-04-27 | 2020-04-27 | Frequency converter circuit and cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211880305U true CN211880305U (en) | 2020-11-06 |
Family
ID=73233774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020665324.8U Expired - Fee Related CN211880305U (en) | 2020-04-27 | 2020-04-27 | Frequency converter circuit and cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211880305U (en) |
-
2020
- 2020-04-27 CN CN202020665324.8U patent/CN211880305U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201106 |
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| CF01 | Termination of patent right due to non-payment of annual fee |