Fan rotating speed controlling circuit
A technology of fan speed and control circuit, applied in pump control, non-variable-capacity pump, machine/engine, etc., can solve the problems of inconvenience and general products without suitable structure
Inactive Publication Date: 2014-12-10
ADDA
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Problems solved by technology
[0003] It can be seen that the above-mentioned existing fan speed control circuit obviously still has inconvenience and defects in structure and use, and needs to be further improved urgently.
In order to solve the above-mentioned problems, the relevant manufacturers have tried their best to find a solution, but for a long time no suitable design has been developed, and the general product has no suitable structure to solve the above-mentioned problems. This is obviously the relevant industry. Urgent problem
Method used
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[0046] In order to further explain the technical means and effects of the present invention to achieve the intended purpose of the invention, the specific implementation, structure, characteristics and effects of the fan speed control circuit proposed according to the present invention will be described below in conjunction with the accompanying drawings and preferred embodiments. , as detailed below.
[0047] see figure 1 As shown, it is a preferred embodiment of the present invention, a fan speed control circuit 100, which is used to control the speed of a fan, the fan speed control circuit 100 includes a driver IC10 and an electrical connection to the driver IC10 The temperature control module 20, the driver IC 10 is used to drive a fan and the temperature control module 20, the temperature control module 20 includes a comparator 21, a first switch circuit 22 and a second switch circuit 23, the comparator 21 can output a first comparison signal or a second comparison sign...
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The invention relates to a fan rotating speed controlling circuit for controlling the rotating speed of a fan. The fan rotating speed controlling circuit comprises a driving integrated circuit (IC) and a temperature controlling module electrically connected with the driving IC, wherein the temperature controlling module comprises a comparator, a first switching circuit and a second switching circuit; the comparator can output a first comparison signal or a second comparison signal; the first switching circuit is provided with a first thermistor which is electrically connected with the comparator and the driving IC; the second switching circuit is electrically connected with the comparator, the driving IC and the first switching circuit; when the comparator outputs the first comparison signal, the first switching circuit is connected, and the second switching circuit is cut off, so that the fan generates a first fan rotating speed; and when the comparator outputs the second comparison signal, the second switching circuit is connected, and the first switching circuit is cut off, so that the fan generates a second fan rotating speed, wherein the second fan rotating speed is higher than the first fan rotating speed.
Description
technical field [0001] The invention relates to a fan speed control circuit, in particular to a fan speed control circuit capable of controlling the fan speed in sections. Background technique [0002] see Figure 6 As shown, it shows a conventional fan speed control circuit 200, the fan speed control circuit 200 is used to receive a target speed signal Starget to control the speed of a fan 300, the fan speed control circuit 200 includes a temperature measurement module 210, A speed regulation module 220 electrically connected to the temperature measurement module 210 and a fan drive module 230 electrically connected to the speed regulation module 220, the temperature measurement module 210 can be a sensing element (such as a thermistor ) to measure the temperature of the environment where the fan 300 is located to generate a temperature value, and the impedance of the thermistor changes with the system or ambient temperature to change the drive power input to the fan. The s...
Claims
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IPC IPC(8): F04D27/00
Inventor 马竞成洪国富
Owner ADDA