Frequency-adjusting and speed-adjusting interface circuit, fan and fan speed adjusting system and method
An interface circuit and speed regulation technology, applied in the direction of machine/engine, mechanical equipment, pump control, etc., can solve the problems of different speeds, inconsistent target speeds, affecting fan output speed, etc., to avoid the influence of temperature and good speed regulation The effect of precision and high precision fan speed regulation
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Embodiment 1
[0024] figure 1 It is a structural schematic diagram of a frequency modulation and speed regulation interface circuit provided by Embodiment 1 of the present invention. Such as figure 1 As shown, the embodiment of the present invention provides an interface circuit for frequency modulation and speed regulation. By using different frequency changes of the pulse signal to set the speed, a detection point of the frequency of the pulse signal is provided, so that the micro-control unit can detect the frequency of the pulse signal at the detection point. , match the speed regulation value corresponding to the frequency, adjust the speed of the fan, and solve the problem of unstable speed regulation accuracy of the fan at different temperatures.
[0025] The frequency modulation and speed regulation interface circuit is connected between the user input device and the micro control unit, and the user input device performs speed regulation value input to the micro control unit throug...
Embodiment 2
[0033] see figure 2 , the embodiment of the present invention provides a fan, including a micro-control unit 22, and also includes the frequency and speed regulation interface circuit 21 provided in the first embodiment above;
[0034] The frequency modulation and speed regulation interface circuit 21 is connected to the micro control unit 22 for processing the pulse signal from the user input device, and transmitting the processed pulse signal to the micro control unit 22;
[0035] The micro control unit 22 is used to determine the frequency of the processed pulse signal, and match the corresponding speed regulation value according to the frequency, so as to adjust the speed of the fan.
[0036] On the basis of the above technical solution, preferably, the fan provided in this embodiment further includes a motor.
[0037] The micro control unit is connected with the motor. After the micro control unit obtains the speed regulation value required by the user according to the ...
Embodiment 3
[0040] see image 3 , the embodiment of the present invention provides a fan speed regulation system, including a user input device 31, and also includes the fan 32 provided in the second embodiment above.
[0041] Preferably, the fan speed regulation system also includes an external power supply;
[0042] The external power supply is connected with the speed regulating system of the fan, and is used to provide electric energy for the whole system.
[0043] It should be noted that the external power supply may be a stable 220V household AC or a DC battery pack, depending on actual needs.
[0044] The fan speed control system provided by the embodiment of the present invention uses different frequency changes of the pulse signal to set the speed, and provides the detection point of the frequency of the pulse signal, so that the micro-control unit can detect the frequency of the pulse signal at the detection point and match the frequency of the pulse signal. The speed regulati...
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