CN216486081U - Brushless electronic fan controller - Google Patents
Brushless electronic fan controller Download PDFInfo
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- CN216486081U CN216486081U CN202123344238.0U CN202123344238U CN216486081U CN 216486081 U CN216486081 U CN 216486081U CN 202123344238 U CN202123344238 U CN 202123344238U CN 216486081 U CN216486081 U CN 216486081U
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Abstract
The utility model relates to the technical field of brushless fan controllers, and discloses a brushless electronic fan controller, which comprises a microcontroller, a first analog signal generating unit, a second analog signal generating unit, an AD converting unit, a power interface, a first voltage reducing unit, a second voltage reducing unit, a PWM driving unit, an output interface, a current sampling unit, a temperature signal input interface and an optical coupling isolating unit, wherein when the brushless electronic fan controller is in actual use, the utility model sets the output voltage of the PWM driving unit through the first analog signal generating unit, can continuously adjust the rotating speed of the brushless electronic fan, sets a maximum temperature value through the second analog signal generating unit, converts an analog quantity signal at the temperature signal input interface into a digital quantity signal through the AD converting unit, and sends the digital quantity signal to the microcontroller to enable the microcontroller to obtain a detection temperature, when the detection temperature is higher than the maximum temperature value, the microcontroller can maximize the output voltage of the PWM driving unit, so that the rotating speed of the brushless electronic fan is fastest, and the heat dissipation is accelerated.
Description
Technical Field
The utility model relates to a brushless fan controller technical field, concretely relates to brushless electronic fan controller.
Background
Fans used in automobiles are largely classified into brush fans and brushless fans, wherein the difference between brush and brushless fans is whether the fan has a carbon brush or not. The brush fan has a short life span due to the loss of the carbon brush, while the brushless fan rotates the fan by changing the direction of the current, and has a long life span. At present, the wind power regulation of most brushless electronic fan controllers is regulated step by step, cannot be continuously regulated, cannot realize maximum wind power regulation when the temperature is too high, and cannot dissipate heat in time.
SUMMERY OF THE UTILITY MODEL
In view of the deficiencies of the background art, the utility model provides a brushless electronic fan controller, the technical problem that solve is that current brushless electronic fan's wind-force is adjusted step by step, can not continuous regulation, and can not realize the biggest wind-force when the high temperature again and adjust.
For solving the technical problem, the utility model provides a following technical scheme: a brushless electronic fan controller comprises a microcontroller, a first analog signal generating unit, a second analog signal generating unit, an AD (analog-to-digital) conversion unit, a power interface, a first voltage reducing unit, a second voltage reducing unit, a PWM (pulse-width modulation) driving unit, an output interface, a current sampling unit, a temperature signal input interface and an optical coupling isolation unit;
the first analog signal generating unit and the second analog signal generating unit are both electrically connected with the AD conversion unit, analog quantity signals are input into the AD conversion unit, the AD conversion unit converts the input analog quantity signals into digital quantity signals, and the converted digital quantity signals are sent to the controller;
the temperature signal input interface is respectively and electrically connected with the AD conversion unit and the input end of the optical coupling isolation unit, and the output end of the optical coupling isolation unit is electrically connected with the microcontroller;
the power interface is respectively and electrically connected with the first voltage reduction unit and the second voltage reduction unit, the output voltage of the first voltage reduction unit is respectively input into the microcontroller, the first analog signal generation unit, the second analog signal generation unit, the AD conversion unit and the optical coupling isolation unit, the output voltage of the second voltage reduction unit is input into the PWM driving unit, the voltage output end of the PWM driving unit is electrically connected with the output interface, the microcontroller inputs a PWM control signal to the PWM driving unit, and the PWM control signal is used for adjusting the output voltage of the PWM driving unit;
the current sampling unit is configured to collect the magnitude of the output current of the PWM driving unit and input a detection signal to the microcontroller.
In actual use, the first analog signal generating unit is used for setting a rotating speed value of the brushless electronic fan, and after the microcontroller receives the corresponding digital value from the AD conversion unit, the rotating speed of the brushless electronic fan is enabled to be the same as the set value by adjusting the output voltage of the PWM driving unit.
When the brushless electronic fan is actually used, the second analog signal generating unit is used for setting a maximum temperature value, the microcontroller receives analog quantity temperature signals output by the peripheral temperature sensor through the temperature signal input interface and obtains a detected temperature through analog-to-digital conversion of the AD conversion unit, and when the detected temperature is higher than the maximum temperature value, the microcontroller drives the brushless electronic fan to rotate at the maximum speed through the PWM driving unit so as to accelerate heat dissipation. In addition, through the optical coupling isolation unit, when a voltage signal exists at the temperature signal input interface, the microcontroller can receive a low level signal, and at the moment, the microcontroller reads a corresponding digital quantity temperature signal from the AD conversion unit, so that the operation quantity of the microprocessor is reduced, the digital quantity temperature signal does not need to be read from the AD conversion unit all the time, and the operation speed of the microcontroller is improved.
In one embodiment, the microcontroller is further electrically connected with an RS232 communication unit and a CAN communication unit. In actual use, if the temperature sensor for detecting temperature does not output analog quantity signals, but transmits temperature detection data in a communication mode, the microcontroller can receive the temperature data through the RS232 communication unit. In addition, the microcontroller CAN interact with other control devices supporting CAN communication via the CAN communication unit.
In a certain embodiment, the power interface is further electrically connected to a power filter and an overcurrent protection unit in sequence, and an output end of the overcurrent protection unit is electrically connected to the first voltage reduction unit and the second voltage reduction unit respectively. When in actual use, can carry out the filtering to the power of power kneck input through power filter, avoid interference signal or protruding thorn in the power to influence the utility model discloses a normal use can realize overcurrent protection when the electric current of power is unusual through overcurrent protection unit.
In one embodiment, the first analog signal generating unit and the second analog signal generating unit respectively include a resistor R1 and a knob type slide rheostat R2, one end of the resistor R1 is electrically connected to the first voltage-dropping unit, the other end of the resistor R1 is electrically connected to the adjusting end of the knob type slide rheostat and the AD converting unit, and one fixed end of the knob type slide rheostat is grounded.
In a certain embodiment, the optical coupling isolation unit includes a photocoupler U1, a resistor R3, a resistor R4, and a resistor R5, the temperature signal input interface is electrically connected to an input terminal of an input side of the photocoupler U1, an output terminal of an input side of the photocoupler U1 is grounded through the resistor R3, an input terminal of an output side of the photocoupler U1 is electrically connected to the resistor R4 and the microcontroller, the other end of the resistor R4 is electrically connected to the first voltage reduction unit, and an output terminal of an output side of the photocoupler U1 is grounded through a resistor R5. In practical use, the temperature voltage at the temperature signal input interface T1 can be prevented from influencing the normal use of the microcontroller through the isolation of the optical coupling isolation unit.
In a certain embodiment, a voltage output end of the first voltage reduction unit is electrically connected to a voltage stabilization unit, and a voltage output end of the voltage stabilization unit is electrically connected to the microcontroller, the first analog signal generation unit, the second analog signal generation unit, the AD conversion unit, and the optical coupling isolation unit, respectively. When in actual use, the voltage input to the microcontroller, the first analog signal generation unit, the second analog signal generation unit, the AD conversion unit and the optical coupling isolation unit by the first voltage reduction unit can be more stable through the voltage stabilization unit.
In one embodiment, a voltage output end of the second voltage reduction unit is electrically connected to a second voltage stabilization unit, and a voltage output end of the second voltage stabilization unit is electrically connected to the PWM driving unit. In actual use, the voltage input to the PWM driving unit by the second voltage stabilizing unit may be more stable by the second voltage stabilizing unit.
Compared with the prior art, the utility model beneficial effect who has is: the output voltage of the PWM driving unit is set through the first analog signal generating unit, the rotating speed of the brushless electronic fan can be continuously adjusted, in addition, the maximum temperature value is set through the second analog signal generating unit, the analog quantity signal at the temperature signal input interface is converted into the digital quantity signal through the AD conversion unit and is sent to the microcontroller, the microcontroller acquires the detection temperature, when the detection temperature is higher than the maximum temperature value, the microcontroller can maximize the output voltage of the PWM driving unit, the rotating speed of the brushless electronic fan is fastest, and the heat dissipation is accelerated.
Drawings
Fig. 1 is a schematic structural diagram of the present invention in an embodiment;
fig. 2 is a schematic structural diagram of a further embodiment of the present invention in an embodiment;
FIG. 3 is a circuit diagram of a first analog signal generating unit in the embodiment;
fig. 4 is a circuit diagram of the optical coupling isolation unit in the embodiment.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, a brushless electronic fan controller includes a microcontroller, a first analog signal generating unit, a second analog signal generating unit, an AD converting unit, a power interface P1, a first voltage dropping unit, a second voltage dropping unit, a PWM driving unit, an output interface V1, a current sampling unit, a temperature signal input interface T1, and an optical coupling isolation unit;
the first analog signal generating unit and the second analog signal generating unit are both electrically connected with the AD conversion unit, and input analog quantity signals to the AD conversion unit, and the AD conversion unit converts the input analog quantity signals into digital quantity signals and sends the converted digital quantity signals to the controller;
the temperature signal input interface T1 is respectively and electrically connected with the input ends of the AD conversion unit and the optical coupling isolation unit, and the output end of the optical coupling isolation unit is electrically connected with the microcontroller;
the power supply interface P1 is respectively and electrically connected with the first voltage reduction unit and the second voltage reduction unit, the output voltage of the first voltage reduction unit is respectively input into the microcontroller, the first analog signal generation unit, the second analog signal generation unit, the AD conversion unit and the optical coupling isolation unit, the output voltage of the second voltage reduction unit is input into the PWM driving unit, the voltage output end of the PWM driving unit is electrically connected with the output interface V1, the microcontroller inputs a PWM control signal to the PWM driving unit, and the PWM control signal is used for adjusting the output voltage of the PWM driving unit;
the current sampling unit is configured to acquire the output current of the PWM driving unit and input a detection signal to the microcontroller. When the brushless electronic fan is actually used, when the current sampling unit detects that the output current of the PWM driving unit is abnormal, the microcontroller stops outputting voltage of the PWM driving unit, and the use safety of the brushless electronic fan is ensured.
In practical use, the microcontroller can adopt a single chip microcomputer.
In actual use, the first analog signal generating unit is used for setting a rotating speed value of the brushless electronic fan, and after the microcontroller receives the corresponding digital value from the AD conversion unit, the rotating speed of the brushless electronic fan is enabled to be the same as the set value by adjusting the output voltage of the PWM driving unit.
When the brushless electronic fan is actually used, the second analog signal generating unit is used for setting a maximum temperature value, the microcontroller receives an analog quantity temperature signal output by the peripheral temperature sensor through the temperature signal input interface T1 and obtains a detected temperature through analog-to-digital conversion of the AD conversion unit, and when the detected temperature is higher than the maximum temperature value, the microcontroller drives the brushless electronic fan to rotate at the maximum speed through the PWM driving unit so as to accelerate heat dissipation. In addition, through the optical coupling isolation unit, when a voltage signal exists at the temperature signal input interface, the microcontroller can receive a low level signal, and at the moment, the microcontroller reads a corresponding digital quantity temperature signal from the AD conversion unit, so that the operation quantity of the microprocessor is reduced, the digital quantity temperature signal does not need to be read from the AD conversion unit all the time, and the operation speed of the microcontroller is improved.
In practical use, the microcontroller adjusts the output voltage of the PWM driving unit to realize the rotation speed of the brushless electronic fan.
As a further technical solution, as shown in fig. 2, the microcontroller is further electrically connected with an RS232 communication unit and a CAN communication unit. In actual use, if the temperature sensor for detecting temperature does not output analog quantity signals, but transmits temperature detection data in a communication mode, the microcontroller can receive the temperature data through the RS232 communication unit. In addition, the microcontroller CAN interact with other control devices supporting CAN communication via the CAN communication unit.
As can be further seen from fig. 2, the power interface P1 is further electrically connected to a power filter and an overcurrent protection unit in turn, and an output end of the overcurrent protection unit is electrically connected to the first voltage reduction unit and the second voltage reduction unit respectively. When in actual use, can locate the power of input to power source P1 through power filter and filter, avoid interfering signal in the power or protruding thorn influence the utility model discloses a normal use can realize overcurrent protection when the electric current of power is unusual through overcurrent protection unit.
Furthermore, the voltage output end of the first voltage reduction unit is electrically connected with a voltage stabilization unit, and the voltage output end of the voltage stabilization unit is electrically connected with the microcontroller, the first analog signal generation unit, the second analog signal generation unit, the AD conversion unit and the optical coupling isolation unit respectively. When in actual use, the voltage input to the microcontroller, the first analog signal generation unit, the second analog signal generation unit, the AD conversion unit and the optical coupling isolation unit by the first voltage reduction unit can be more stable through the voltage stabilization unit. Specifically, in this embodiment, the voltage input to the microcontroller, the first analog signal generating unit, the second analog signal generating unit, the AD converting unit, and the optical coupling isolating unit by the voltage stabilizing unit is 5V.
Furthermore, the voltage output end of the second voltage reduction unit is electrically connected with a second voltage stabilization unit, and the voltage output end of the second voltage stabilization unit is electrically connected with the PWM driving unit. In actual use, the voltage input to the PWM driving unit by the second voltage stabilizing unit may be more stable by the second voltage stabilizing unit. Specifically, in the present embodiment, the voltage input to the PWM driving unit by the second voltage stabilizing unit is 24V.
In practical use, the voltage stabilizing unit and the second voltage stabilizing unit can adopt voltage stabilizing diodes.
As shown in fig. 4, the first analog signal generating unit and the second analog signal generating unit in this embodiment respectively include a resistor R1 and a knob type slide rheostat R2, one end of the resistor R1 is electrically connected to the first voltage-dropping unit, the other end of the resistor R1 is electrically connected to the adjusting end of the knob type slide rheostat R2 and the AD converting unit, and one fixed end of the knob type slide rheostat R2 is grounded. In practical use, the voltage input to the AD conversion unit by the first analog signal generation unit and the second analog signal generation unit can be adjusted by adjusting the resistance of the knob type slide rheostat R2.
As shown in fig. 3, in this embodiment, the optical coupling isolation unit includes a photocoupler U1, a resistor R3, a resistor R4, and a resistor R5, the temperature signal input interface T1 is electrically connected to an input terminal I1 on the input side of the photocoupler U1, an output terminal on the input side of the photocoupler U1 is grounded through the resistor R3, an input terminal O1 on the output side of the photocoupler U1 is electrically connected to the resistor R4 and the microcontroller, the other end of the resistor R4 is electrically connected to the first voltage reduction unit, and an output terminal on the output side of the photocoupler U1 is grounded through the resistor R5. When in actual use, the temperature voltage at the temperature input interface can be prevented from influencing the normal use of the microcontroller through the isolation of the optical coupling isolation unit.
To sum up, the utility model discloses an output voltage size that first analog signal produces the unit and sets up PWM drive unit, can continuous regulation brushless electronic fan's rotational speed, produce the unit through the second analog signal in addition and set up the maximum temperature value, AD converting unit truns into the analog signal of temperature signal input kneck into the digital signal and sends for microcontroller, let microcontroller acquire the detection temperature, when detection temperature is greater than the maximum temperature value, microcontroller can let PWM drive unit's output voltage be the biggest, make brushless electronic fan's rotational speed the fastest, dispel the heat with higher speed.
In light of the above, the present invention is not limited to the above embodiments, and various changes and modifications can be made by the worker without departing from the scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. A brushless electronic fan controller is characterized by comprising a microcontroller, a first analog signal generating unit, a second analog signal generating unit, an AD (analog-to-digital) conversion unit, a power interface, a first voltage reduction unit, a second voltage reduction unit, a PWM (pulse width modulation) driving unit, an output interface, a current sampling unit, a temperature signal input interface and an optical coupling isolation unit;
the first analog signal generating unit and the second analog signal generating unit are both electrically connected with the AD conversion unit, analog quantity signals are input into the AD conversion unit, the AD conversion unit converts the input analog quantity signals into digital quantity signals, and the converted digital quantity signals are sent to the controller;
the temperature signal input interface is respectively and electrically connected with the AD conversion unit and the input end of the optical coupling isolation unit, and the output end of the optical coupling isolation unit is electrically connected with the microcontroller;
the power interface is respectively and electrically connected with the first voltage reduction unit and the second voltage reduction unit, the output voltage of the first voltage reduction unit is respectively input into the microcontroller, the first analog signal generation unit, the second analog signal generation unit, the AD conversion unit and the optical coupling isolation unit, the output voltage of the second voltage reduction unit is input into the PWM driving unit, the voltage output end of the PWM driving unit is electrically connected with the output interface, the microcontroller inputs a PWM control signal to the PWM driving unit, and the PWM control signal is used for adjusting the output voltage of the PWM driving unit;
the current sampling unit is configured to collect the magnitude of the output current of the PWM driving unit and input a detection signal to the microcontroller.
2. A brushless electronic fan controller according to claim 1, wherein the microcontroller is further electrically connected to an RS232 communication unit and a CAN communication unit.
3. The brushless electronic fan controller according to claim 1, wherein the power interface is further electrically connected to a power filter and an overcurrent protection unit in turn, and an output terminal of the overcurrent protection unit is electrically connected to the first voltage reduction unit and the second voltage reduction unit, respectively.
4. The brushless electronic fan controller as claimed in claim 1, wherein the first and second analog signal generating units respectively comprise a resistor R1 and a knob-type slide rheostat R2, one end of the resistor R1 is electrically connected to the first voltage dropping unit, the other end of the resistor R1 is electrically connected to the adjusting terminal of the knob-type slide rheostat R2 and the AD conversion unit, and one fixed end of the knob-type slide rheostat R2 is grounded.
5. The brushless electronic fan controller according to claim 1, wherein the optical coupling isolation unit comprises a photocoupler U1, a resistor R3, a resistor R4 and a resistor R5, the temperature signal input interface is electrically connected to an input end of an input side of the photocoupler U1, an output end of an input side of the photocoupler U1 is grounded through the resistor R3, an input end of an output side of the photocoupler U1 is electrically connected to the resistor R4 and the microcontroller, the other end of the resistor R4 is electrically connected to the first voltage reduction unit, and an output end of an output side of the photocoupler U1 is grounded through the resistor R5.
6. The brushless electronic fan controller according to claim 1, wherein the voltage output terminal of the first voltage-reducing unit is electrically connected to a voltage-stabilizing unit, and the voltage output terminal of the voltage-stabilizing unit is electrically connected to the microcontroller, the first analog signal generating unit, the second analog signal generating unit, the AD converting unit, and the optical coupling isolating unit, respectively.
7. The brushless electronic fan controller according to claim 1, wherein a voltage output terminal of the second voltage-reducing unit is electrically connected to a second voltage-stabilizing unit, and a voltage output terminal of the second voltage-stabilizing unit is electrically connected to the PWM driving unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123344238.0U CN216486081U (en) | 2021-12-28 | 2021-12-28 | Brushless electronic fan controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123344238.0U CN216486081U (en) | 2021-12-28 | 2021-12-28 | Brushless electronic fan controller |
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| Publication Number | Publication Date |
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| CN216486081U true CN216486081U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123344238.0U Active CN216486081U (en) | 2021-12-28 | 2021-12-28 | Brushless electronic fan controller |
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| CN (1) | CN216486081U (en) |
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- 2021-12-28 CN CN202123344238.0U patent/CN216486081U/en active Active
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