CN108571461B - Fan control device, fan system and frequency converter system - Google Patents
Fan control device, fan system and frequency converter system Download PDFInfo
- Publication number
- CN108571461B CN108571461B CN201810551988.9A CN201810551988A CN108571461B CN 108571461 B CN108571461 B CN 108571461B CN 201810551988 A CN201810551988 A CN 201810551988A CN 108571461 B CN108571461 B CN 108571461B
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- intermediate relay
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- 230000017525 heat dissipation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
- H05K7/20909—Forced ventilation, e.g. on heat dissipaters coupled to components
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention relates to a fan control device, a fan system and a frequency converter system, wherein the fan control device comprises four control branches led out by a power supply, a start switch, a stop switch and a control coil of a first intermediate relay are arranged on a first control branch in series, a main normally open contact of the first intermediate relay is arranged on a power supply line of a heat-dissipating device in series, an auxiliary normally closed contact of the first intermediate relay and a control coil of a time relay are arranged on a second control branch in series, a time delay closing contact of the time relay and a control coil of a second intermediate relay are arranged on a third control branch in series, and an auxiliary normally closed contact of the second intermediate relay and a fan are arranged on a fourth control branch in series. Therefore, the device has the advantages of simple structure, reliable control, automatic start and delay stop control realization, energy saving, practicability and stability. In addition, the scheme has reasonable design and wide application range, and meets the requirements of safety, reliability and unattended operation.
Description
Technical Field
The invention relates to a fan control device, a fan system and a frequency converter system.
Background
The frequency conversion cabinet is a control cabinet for dragging the power device by using the frequency converter, and becomes a power dragging mode which is currently popularized due to good starting performance, speed regulation performance and energy saving effect. In the power distribution produced in the industrial field, when the motor control cabinet is used for the frequency converter, a great amount of heat is generated by the frequency converter in the working process, so that the temperature in the switch cabinet rises to exceed a preset standard, the working performance of the frequency converter and various insulating parts is damaged, the service life of a facility is shortened, and the like, and a fan is added into a cabinet body to achieve the purpose of heat dissipation, so that the frequency converter dissipates heat. The fan is required to be reliably controlled, excessive heat generated is timely discharged, and the influence on safe production is reduced, however, the existing fan control device is complex in control process or circuit structure, and the control reliability is low.
Disclosure of Invention
The invention aims to provide a fan control device which is used for solving the problem that the circuit structure of the existing fan control device is complex. The invention also provides a fan system and a frequency converter system.
In order to achieve the above object, the present invention includes the following technical solutions.
The utility model provides a fan controlling means, includes four control branch ways that draw forth by power supply, and the cluster is equipped with start switch, stop switch and first intermediate relay's control coil on the first control branch way, and the cluster is equipped with on the second control branch way auxiliary normally closed contact and the time relay's of first intermediate relay control coil, and the cluster is equipped with on the third control branch way time relay's time delay closed contact and the control coil of second intermediate relay, and the cluster is equipped with on the fourth control branch way auxiliary normally closed contact of second intermediate relay, the fan is used for the cluster to establish on the fourth control branch way.
When the power supply supplies power, the four control branches are electrified and operate the starting switch, the control coil of the first intermediate relay is electrified, the auxiliary normally-closed contact of the first intermediate relay is disconnected, the control coil of the time relay is in a power failure state, the auxiliary normally-closed contact of the second intermediate relay is in a closed state, and the fan is electrified and started; when the stop switch is operated, the control coil of the first intermediate relay is powered off, the auxiliary normally-closed contact is closed, the control coil of the time relay is powered on, the delay closing contact of the time relay is closed for a certain time, namely, the control coil of the second intermediate relay is powered on after a certain time delay, the auxiliary normally-closed contact of the second intermediate relay is disconnected, the fan is powered off and stopped, and the purpose that the fan is stopped after the residual heat of the heat-dissipating equipment is thoroughly removed is achieved. Therefore, the fan control device can realize automatic start and delay stop control of the fan. And the delay time of the time relay is adjustable, so that flexible control of delay stopping of the fan is realized. Therefore, the circuit has the advantages of simple structure, reliable control, energy saving, practicability and reliable stability, solves the problem of fan control, realizes automatic starting and delay stopping control. In addition, the scheme has reasonable and convenient design and wide application range, and meets the requirements of safety, reliability and unattended operation.
Further, the starting switch is a starting button, the stopping switch is a stopping button, and the starting button is connected with the auxiliary normally open contact of the first intermediate relay in parallel.
The fan system comprises a fan and a fan control device, wherein the fan control device comprises four control branches led out by a power supply, a start switch, a stop switch and a control coil of a first intermediate relay are arranged on a first control branch in series, an auxiliary normally-closed contact of the first intermediate relay and a control coil of a time relay are arranged on a second control branch in series, a delay closed contact of the time relay and a control coil of a second intermediate relay are arranged on a third control branch in series, and an auxiliary normally-closed contact of the second intermediate relay and the fan are arranged on a fourth control branch in series.
When the power supply supplies power, the four control branches are electrified and operate the starting switch, the control coil of the first intermediate relay is electrified, the auxiliary normally-closed contact of the first intermediate relay is disconnected, the control coil of the time relay is in a power failure state, the auxiliary normally-closed contact of the second intermediate relay is in a closed state, and the fan is electrified and started; when the stop switch is operated, the control coil of the first intermediate relay is powered off, the auxiliary normally-closed contact is closed, the control coil of the time relay is powered on, the delay closing contact of the time relay is closed for a certain time, namely, the control coil of the second intermediate relay is powered on after a certain time delay, the auxiliary normally-closed contact of the second intermediate relay is disconnected, the fan is powered off and stopped, and the purpose that the fan is stopped after the residual heat of the heat-dissipating equipment is thoroughly removed is achieved. Therefore, the fan control device can realize automatic start and delay stop control of the fan. And the delay time of the time relay is adjustable, so that flexible control of delay stopping of the fan is realized.
Further, the starting switch is a starting button, the stopping switch is a stopping button, and the starting button is connected with the auxiliary normally open contact of the first intermediate relay in parallel.
The utility model provides a converter system, includes converter and fan system, fan system includes fan and fan controlling means, fan controlling means includes four control branch ways that draw forth by the power supply of converter, and the cluster is equipped with the control coil of start switch, stop switch and first intermediate relay on the first control branch way, the main normally open contact cluster of first intermediate relay is established on the power supply line of converter, and the cluster is equipped with on the second control branch way auxiliary normally closed contact and the control coil of time relay of first intermediate relay, and the cluster is equipped with on the third control branch way time delay closed contact and the control coil of second intermediate relay of time relay, and the cluster is equipped with on the fourth control branch way auxiliary normally closed contact and the fan of second intermediate relay.
When the power supply of the frequency converter supplies power, namely after the power supply inlet end side of the frequency converter is electrified, four control branches are electrified, and a starting switch is operated, a control coil of the first intermediate relay is electrified, a main normally open contact of the first intermediate relay is closed, the frequency converter is electrified and started, an auxiliary normally closed contact of the first intermediate relay is disconnected, the control coil of the time relay is in a power failure state, an auxiliary normally closed contact of the second intermediate relay is in a closed state, and the fan is electrified and started, namely the frequency converter and the fan are started simultaneously. When the stop switch is operated, the control coil of the first intermediate relay is powered off, the main normally open contact is opened, the frequency converter is powered off and stopped, the auxiliary normally closed contact is closed, the control coil of the time relay is powered on, the time delay closing contact of the time relay is delayed for a certain time to be closed, namely, the control coil of the second intermediate relay is powered on after a certain time delay, the auxiliary normally closed contact of the second intermediate relay is opened, and the fan is powered off and stopped. Therefore, the fan control device can realize that the frequency converter and the fan are started simultaneously, and after the frequency converter is stopped, the fan continues to run for a period of time and then stops, so that the purpose that the fan stops after the residual heat of the frequency converter is thoroughly removed is realized. And the delay time of the time relay is adjustable, so that flexible control of delay stopping of the fan is realized.
Further, the starting switch is a starting button, the stopping switch is a stopping button, and the starting button is connected with the auxiliary normally open contact of the first intermediate relay in parallel.
Drawings
Fig. 1 is a control circuit diagram of a frequency converter system.
Detailed Description
Frequency converter system embodiments
The embodiment provides a frequency converter system, including frequency converter and fan system, fan system is used for dispeling the heat to the frequency converter, because the frequency converter belongs to prior art, consequently, the protection point of this frequency converter system is fan system. Moreover, the fan system comprises a fan and a fan control device, and the fan belongs to the prior art, so that the protection point of the fan system is the fan control device. Therefore, the protection points of the frequency converter system and the fan system are both fan control devices, and then the application object of the fan system, namely the application object of the fan control device, is not limited to the frequency converter, and other equipment to be cooled can be other than the frequency converter.
Fig. 1 is a control circuit diagram of a frequency converter system, as shown in fig. 1, a fan control device includes four control branches, and power supplies of the four control branches are power supplies of the frequency converter, and when the power supplies of the frequency converter supply power, electric energy is provided for the four control branches. As a specific embodiment, as shown in fig. 1, the breaker inlet A, N is the total ac power source that provides power to the frequency converter and four control branches. START is a frequency converter START control button, simply called a START button, STOP is a frequency converter STOP control button, simply called a STOP button. The relay KA1 is a first intermediate relay, this embodiment names it as a frequency converter control relay, the relay KA2 is a second intermediate relay, this embodiment names it as a fan control relay, and FU is a fuse.
As shown in fig. 1, a control coil of a START button START, a STOP button STOP and a relay KA1 is connected in series on the first control branch, and the START button START is connected in parallel with an auxiliary normally open contact of the relay KA 1; the second control branch is connected with an auxiliary normally-closed contact of a relay KA1 and a control coil of a time relay KT in series; the third control branch is connected with a delay closing contact of the time relay KT and a control coil of the relay KA2 in series; the fourth control branch is connected with an auxiliary normally closed contact of the relay KA2 in series, and the fan is also connected with the fourth control branch in series. The main normally open contact of the relay KA1 is connected in series to the power supply line of the inverter.
When the power supply of converter is supplied with power, namely after the circuit breaker inlet end A, N is electrified, the power supply supplies power for four control branches, the START command of the converter is sent by a START button START, the START button START is pressed, the control coil of the relay KA1 is electrified, the main normally open contact of the relay KA1 is closed, the converter is electrified and started, the auxiliary normally closed contact of the relay KA1 is disconnected, the control coil of the time relay KT is powered off, the auxiliary normally closed contact of the relay KA2 is in a closed state, the fan is electrified and operated, and the aim that the converter and the fan are operated simultaneously is achieved. The power-on time of the incoming line terminal A, N of the circuit breaker and the time when the START button START is pressed are generally the same time, and may be: the incoming line end A, N of the circuit breaker is just electrified, and then the START button START is pressed down, and the incoming line end A, N of the circuit breaker is not greatly different in time.
When a STOP command is sent, namely when a STOP button STOP is pressed, a control coil of the relay KA1 is powered off, a main normally-open contact is opened, a frequency converter is powered off and stopped, an auxiliary normally-closed contact of the relay KA1 is closed, a control coil of the time relay KT is powered on, a time-delay closed contact of the time relay KT is closed after a certain time delay, namely the control coil of the relay KA2 is powered on after a certain time delay, an auxiliary normally-closed contact of the relay KA2 is opened, a fan is powered off and stopped, namely an auxiliary normally-closed contact of the relay KA2 is opened in a time delay manner, and the fan is powered off and stopped in a time delay manner. Therefore, the fan control device can realize that the frequency converter and the fan are started simultaneously, and after the frequency converter is stopped, the fan continues to run for a period of time and then stops, so that the purpose that the fan stops after the residual heat of the frequency converter is thoroughly removed is realized. And the delay time of the time relay KT is adjustable, so that flexible control of delay stopping of the fan is realized.
Therefore, the intermediate relay and the time relay are adopted to realize the start and stop control of the heat dissipation fan, the intermediate relay controls the operation of the frequency converter to stop, and the intermediate relay and the time relay realize the automatic start and the delay stop of the fan.
As another embodiment, if the START button START is a START switch (for example, a knife switch) that can be held in the post-operation state, and the STOP button STOP is a STOP switch (for example, a knife switch) that can be held in the post-operation state, the START switch does not need to be connected in parallel with the auxiliary normally open contact of the relay KA 1.
Specific embodiments are given above, but the invention is not limited to the described embodiments. The basic idea of the invention is that the above basic scheme, it is not necessary for a person skilled in the art to design various modified models, formulas, parameters according to the teaching of the invention to take creative effort. Variations, modifications, substitutions and alterations are also possible in the embodiments without departing from the principles and spirit of the present invention.
Blower system embodiments
The embodiment provides a fan system, which comprises a fan and a fan control device. In the above-mentioned embodiment of the inverter system, the main normally open contact of the relay KA1 is serially arranged on the power supply line of the inverter, and of course, for the fan control device, the specific position of the main normally open contact of the relay KA1 is not a technical feature of the fan control device, and the setting position is not limited. Then, the fan control device is only used for controlling the automatic start and delay stop of the fan, and the control of the start and stop of the equipment to be cooled is not limited. Since the circuit configuration of the fan control apparatus has been described in detail in the above-described inverter system embodiment, this embodiment will not be described in detail.
Then, when the power supply supplies power, the four control branches are electrified, and the START button START is pressed, the control coil of the relay KA1 is electrified, the auxiliary normally-closed contact of the relay KA1 is disconnected, the control coil of the time relay KT is deenergized, the auxiliary normally-closed contact of the relay KA2 is in a closed state, and the fan is electrified and operated. As in the above-described embodiment of the inverter system, the time when the power supply supplies power and the time when the START button START is pressed are generally the same time, and may be: the power supply just supplies power, and then the START button START is pressed, the two are not much different in time.
When STOP command is sent, namely when the STOP button STOP is pressed down, the control coil of the relay KA1 is powered off, the auxiliary normally closed contact of the relay KA1 is closed, the control coil of the time relay KT is powered on, the delay closed contact of the time relay KT is closed after a certain time delay, namely the control coil of the relay KA2 is powered on after a certain time delay, the auxiliary normally closed contact of the relay KA2 is opened, the fan is powered off and stopped, namely the auxiliary normally closed contact of the relay KA2 is opened in a delay mode, and the fan is powered off and stopped in a delay mode, so that the purpose that the fan is stopped after the residual heat of heat dissipation equipment is thoroughly eliminated is achieved. Therefore, the fan control device can realize automatic start and delay stop control of the fan. And the delay time of the time relay KT is adjustable, so that flexible control of delay stopping of the fan is realized.
Fan control apparatus embodiment
The present embodiment provides a fan control apparatus, and since the fan control apparatus has been described in detail in the above-described fan system embodiments, the present embodiment will not be described in detail.
Claims (6)
1. The fan control device is characterized by comprising four control branches led out by a power supply, wherein a start switch, a stop switch and a control coil of a first intermediate relay are arranged on a first control branch in series, an auxiliary normally-closed contact of the first intermediate relay and a control coil of a time relay are arranged on a second control branch in series, a delay closed contact of the time relay and a control coil of a second intermediate relay are arranged on a third control branch in series, an auxiliary normally-closed contact of the second intermediate relay is arranged on a fourth control branch in series, and a fan is arranged on a fourth control branch in series.
2. The fan control apparatus of claim 1, wherein the start switch is a start button and the stop switch is a stop button, the start button being connected in parallel with the auxiliary normally open contact of the first intermediate relay.
3. The fan system comprises a fan and a fan control device, and is characterized in that the fan control device comprises four control branches led out by a power supply, a start switch, a stop switch and a control coil of a first intermediate relay are arranged on a first control branch in series, an auxiliary normally-closed contact of the first intermediate relay and a control coil of a time relay are arranged on a second control branch in series, a delay closed contact of the time relay and a control coil of a second intermediate relay are arranged on a third control branch in series, and an auxiliary normally-closed contact of the second intermediate relay and the fan are arranged on a fourth control branch in series.
4. The fan system of claim 3, wherein the start switch is a start button and the stop switch is a stop button, the start button being connected in parallel with the auxiliary normally open contact of the first intermediate relay.
5. The utility model provides a converter system, its characterized in that includes converter and fan system, fan system includes fan and fan controlling means, fan controlling means includes four control branch ways that draw forth by the power supply of converter, and the cluster is equipped with the control coil of start switch, stop switch and first intermediate relay on the first control branch way, the main normally open contact cluster of first intermediate relay is established on the power supply line of converter, and the second control branch way is equipped with the auxiliary normally closed contact of first intermediate relay and the control coil of time relay, and the cluster is equipped with on the third control branch way time delay closed contact of time relay and the control coil of second intermediate relay, and the cluster is equipped with on the fourth control branch way auxiliary normally closed contact of second intermediate relay and fan.
6. The frequency converter system of claim 5, wherein the start switch is a start button and the stop switch is a stop button, the start button being connected in parallel with an auxiliary normally open contact of the first intermediate relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810551988.9A CN108571461B (en) | 2018-05-31 | 2018-05-31 | Fan control device, fan system and frequency converter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810551988.9A CN108571461B (en) | 2018-05-31 | 2018-05-31 | Fan control device, fan system and frequency converter system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108571461A CN108571461A (en) | 2018-09-25 |
| CN108571461B true CN108571461B (en) | 2023-11-21 |
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| CN201810551988.9A Active CN108571461B (en) | 2018-05-31 | 2018-05-31 | Fan control device, fan system and frequency converter system |
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| CN112261843B (en) * | 2020-10-27 | 2024-05-28 | 国网福建省电力有限公司石狮市供电公司 | Power-off and power-on heat dissipation device for power distribution automation terminal and working method thereof |
| CN112242800B (en) * | 2020-11-20 | 2022-05-17 | 中船华南船舶机械有限公司 | Multi-motor electric control system |
| CN112634554A (en) * | 2020-12-28 | 2021-04-09 | 刘晓磊 | Air switch safety operation signboard in electrical switch cabinet and method |
| CN113395019A (en) * | 2021-06-25 | 2021-09-14 | 安徽海螺建材设计研究院有限责任公司 | Variable frequency motor and remote linkage control system and method for cooling fan of variable frequency motor |
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