CN213144838U - Stepless speed regulating device for low-voltage frequency converter fan - Google Patents
Stepless speed regulating device for low-voltage frequency converter fan Download PDFInfo
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- CN213144838U CN213144838U CN202021773269.0U CN202021773269U CN213144838U CN 213144838 U CN213144838 U CN 213144838U CN 202021773269 U CN202021773269 U CN 202021773269U CN 213144838 U CN213144838 U CN 213144838U
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Abstract
The utility model relates to a stepless speed adjusting device for low-voltage inverter fan, this system comprises power supply unit, rectification filtering unit, contravariant unit, load, main control system unit, speed governing unit, cooling fan and operating panel. The operation panel is in communication connection with a main control panel of the main control system unit, the power supply unit outputs direct current to the inverter unit after supplying power to the rectifying and filtering unit, meanwhile, the bus end of the rectifying and filtering unit supplies power to the main control system unit, a pulse signal is sent by a chip on the main control panel to control the on-off of the IGBT of the variable unit and output SPWM pulse modulation, and then the output SPWM pulse modulation is supplied to a load, meanwhile, the main control system unit supplies power to the speed regulation unit and then the cooling fan runs, the main control system unit regulates the effective value of output voltage by controlling the pulse duty ratio of the output voltage or the phase angle of a thyristor according to the temperature change of.
Description
Technical Field
The utility model relates to a stepless speed adjusting device for low-voltage inverter fan, output direct current after giving the power supply of rectification filtering unit including the power supply unit and being connected to the contravariant unit, rectification filtering unit bus end supplies power for main control system unit simultaneously.
Background
In recent years, with the emphasis of the country on energy conservation and emission reduction, various production enterprises put forward higher requirements on production efficiency, energy conservation and the like, and the low-voltage frequency converter for energy conservation and speed regulation is widely applied to important fields of electric power, chemical industry, medical instruments and the like.
Radiator fan plays absolute effect in the low-voltage inverter, along with the long-time operation of low-voltage inverter, bus-bar capacitance, main device temperatures such as contravariant module all rise gradually, because radiator fan is constantly moving for each main device temperature of converter is all in normal range, but long-time rated power operation radiator fan, not only the energy consumption is higher, and cause great influence to fan life, very big reduction converter cooling system's stability and reliability.
Disclosure of Invention
To above problem, the utility model provides a stepless speed adjusting device for low-voltage inverter fan reaches energy saving and consumption reduction's purpose through the electrodeless rotational speed of speed governing unit automatically regulated cooling fan.
For solving the technical problem, the utility model discloses a stepless speed adjusting device for low-voltage inverter fan includes that power supply unit exports direct current after giving the power supply of rectification filter unit and is connected to the contravariant unit, and rectification filter unit bus-bar end supplies power for the major system unit simultaneously, still includes to adopt the communication to be connected between the main control panel of major system unit and the operating panel. The main control board sends a signal to the speed regulating unit through the internal chip to regulate the rotating speed of the cooling fan, and meanwhile, the chip on the main control board sends a pulse signal to control the on and off of the IGBT of the inversion unit and output SPWM pulse modulated waves to a load.
The stepless speed regulation unit of the stepless speed regulation device realizes stepless speed regulation of the direct-current cooling fan by regulating the pulse width duty ratio of the driving circuit, or realizes stepless speed regulation of the alternating-current cooling fan by regulating the conduction phase angle of the thyristor. The speed regulating unit also controls the wind speed of the heat radiation fan by regulating the effective value of the output voltage according to the load factor of the system equipment or the real-time temperature of the radiator, thereby realizing stepless speed regulation.
After the device is adopted, the heat radiation fan detects the input voltage and the wind speed in real time, the chip carries out comparison calculation, whether the actual wind quantity of the heat radiation fan is matched with the wind quantity set in advance by a control command or not is judged, and if the deviation exceeds the preset threshold value, the main control panel receives a signal and gives an alarm prompt through the operation panel.
The utility model discloses cooling fan input voltage all slowly rises to fan rated voltage from low to high, starts no impulse current in the twinkling of an eye, realizes smooth start, and the cooling fan input need not starting electric capacity, has reduced the damage that the starting transient current overshoots and causes cooling fan, has practiced thrift the hardware cost simultaneously. The controllable direct current fan of this device and exchange fan can realize the switching of direct current output and interchange output through operating panel, and easy operation is convenient, and can look over the matching value between the real-time temperature of radiator and amount of wind and the voltage through operating panel, has improved system stability and reliability.
Drawings
The invention will be described in further detail with reference to the accompanying drawings and the control system structure and principle embodiments:
fig. 1 is a block diagram of the stepless speed regulation device for the low-voltage frequency converter fan.
Detailed Description
Fig. 1 can see when cooling fan 7 starts, power supply unit 1 exports direct current to contravariant unit 3 behind the intercommunication rectification filter unit 2, rectification filter unit 2 supplies power for main control system unit 5 simultaneously, main control system unit 5 contains the master control board, the master control board sends the signal through internal chip and supplies load 4 for contravariant unit 3, simultaneously main control system unit 5 is for cooling fan 7 operation behind the power supply of speed governing unit 6, according to cooling fan 7 parameter, through 8 changeable direct current fan control of operating panel or alternating current fan control, high durability and convenient use and easy operation. When the cooling fan 7 is a direct current fan, the output voltage of the speed regulating unit 6 is the starting voltage of the cooling fan 7 after power is supplied, so that the reduced-voltage starting is realized; when the cooling fan 7 is an alternating current fan, the power supply unit 1 supplies power to the speed regulating unit 6, and the thyristor conduction phase angle is regulated by the speed regulating unit 6, so that the voltage of the cooling fan 7 slowly rises, and smooth starting is realized.
In the operation process of the cooling fan 7, the thermocouple collects the real-time temperature of the radiator and uploads the temperature to the main control system unit 5, the temperature is calculated into a data form and transmitted to the speed regulating unit 6, and when the cooling fan 7 is a direct current fan, the speed regulating unit 6 controls the wind speed of the cooling fan 7 by regulating the duty ratio of output voltage according to the load rate of system equipment or the change of the real-time temperature of the radiator, so that the stepless speed regulation of the direct current fan is realized; when the cooling fan 7 is an alternating current fan, the phase conduction angle of the thyristor is controlled through the speed regulating unit 6, the effective value of the output voltage is regulated, and stepless speed regulation of the alternating current fan is realized. The energy consumption is reduced, the service life of the cooling fan 7 is prolonged, and the stability and the reliability of the low-voltage frequency converter are improved.
This device real-time supervision radiator fan 7 output voltage, radiator temperature and amount of wind are compared by the internal chip of master control board and are calculated, judge whether the actual amount of wind of radiator fan 7 matches with the amount of wind that the control command set for in advance, if the deviation surpassed the threshold value that sets for in advance, then give the warning suggestion through operating panel 8 after the master control board received the signal, make things convenient for customer and after-sales personnel in time to know radiator fan 7 and circuit board operating condition.
The above description is only the preferred embodiment of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several variations and modifications can be made, and these should also be considered as belonging to the protection scope of the present invention.
Claims (4)
1. The utility model provides a stepless speed regulation device for low-voltage inverter fan, includes power supply unit (1) and gives rectification filter unit (2) power supply back, exports direct current and is connected to inverter unit (3), and main control system unit (5) power supply is given to rectification filter unit (2) bus end simultaneously, its characterized in that: still include adopt the communication to be connected between the main control board of major control system unit (5) and operating panel (8), the main control board sends the signal through inside chip and adjusts radiator fan (7) rotational speed for speed governing unit (6), and the chip sends switching on of pulse signal control contravariant unit (3) IGBT and cuts off simultaneously on the main control board, and the output SPWM pulse modulation back of the wave provides load (4).
2. The stepless speed regulation device for the fan of the low-voltage frequency converter according to claim 1 is characterized in that: the speed regulation unit (6) realizes stepless speed regulation of the direct current heat dissipation fan (7) by regulating the pulse width duty ratio of the driving circuit, or realizes stepless speed regulation of the alternating current heat dissipation fan (7) by regulating the conduction phase angle of the thyristor.
3. The stepless speed regulation device for the low-voltage frequency converter fan according to claim 1 or 2 is characterized in that: the speed regulating unit (6) controls the wind speed of the heat radiation fan (7) by regulating the effective value of the output voltage according to the load factor of the system equipment or the real-time temperature of the radiator.
4. The stepless speed regulation device for the fan of the low-voltage frequency converter according to claim 1 is characterized in that: and the main control system unit (5) detects the input voltage and the wind speed of the cooling fan (7) in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021773269.0U CN213144838U (en) | 2020-08-24 | 2020-08-24 | Stepless speed regulating device for low-voltage frequency converter fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021773269.0U CN213144838U (en) | 2020-08-24 | 2020-08-24 | Stepless speed regulating device for low-voltage frequency converter fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213144838U true CN213144838U (en) | 2021-05-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021773269.0U Active CN213144838U (en) | 2020-08-24 | 2020-08-24 | Stepless speed regulating device for low-voltage frequency converter fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213144838U (en) |
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2020
- 2020-08-24 CN CN202021773269.0U patent/CN213144838U/en active Active
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