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Fan control system using a microcontroller

A micro-processing unit, fan speed technology, applied in the direction of single motor speed/torque control, starting device, single-phase motor control, etc., can solve the problems of not being able to provide voltage, increasing manufacturing costs, and increasing the volume of the fan control system circuit

Inactive Publication Date: 2006-01-18
DELTA ELECTRONICS INC
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Problems solved by technology

However, the power supply provided by some fan systems may exceed the maximum voltage value. At this time, the input voltage must be controlled below point B by means of cut-off voltage to avoid damage to the fan motor.
This method not only increases the manufacturing cost and time, but also cannot provide a stable voltage by cutting off the voltage, so that the fan motor may still be damaged
[0013] In addition, in the above-mentioned known fan control systems, if the function of detecting the rotating speed and alarming is added to alarm or interrupt the operation of the fan when the rotating speed is too high, additional circuit components must be added, which increases the manufacturing cost and makes the fan control system more complicated. The volume of the circuit is further increased, causing inconvenience

Method used

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Embodiment Construction

[0068] The fan speed control device of the present invention uses a micro-processing unit (Micro controller) to replace each circuit assembly in the known technology; since the micro-processing unit has a programmable characteristic, it is easy to modify its function, and the volume is small, and it has an acceptable The function of converting the digital / analog (A / D) signal can therefore achieve the purpose of solving various problems of the known technology. Each embodiment of the fan speed control device of the present invention will be described respectively below.

[0069] Please refer to Figure 4 , illustrating the fan speed control device according to an embodiment of the present invention. In the present invention, the same part as the known device is that the fan 100 also receives an operating voltage Vcc and the drive of the fan motor also utilizes a fan drive unit, such as Figure 4 The fan drive circuit 110 in. The part different from the prior art adopts a mic...

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Abstract

A fan control system. The fan control system has a programmable microcontroller to receive an input signal and a rotation speed signal corresponding to the actual rotation speed of the fan motor, determining an output signal according to the input signal and the rotation speed signal, and outputting the output signal; and a fan-driving unit to receive the output signal and adjusting the rotation speed for driving the fan motor according to the output signal. The rotation speed is in a relation of a multi-stage function to the input signal.

Description

technical field [0001] The present invention relates to a fan speed control device, and more particularly to a fan speed control device using a microcontroller to control a fan motor. Background technique [0002] Generally speaking, the known fan control system can be controlled by using a complex circuit composed of various circuit components according to different functions required. For example, Figure 1a , Figure 1b , Figure 1c , Figure 2a as well as Figure 2b Represents well known fan control systems for various functions. These known fan control systems are described below respectively. [0003] First, known fan control systems can be used to control the speed of the fan. For example, Figure 1a It is a schematic diagram showing the external variable DC voltage signal control in the known fan control system. Figure 1a The fan 500 in the fan 500 receives an operating voltage Vcc, and uses a comparator 520 to generate a pulse modulation (PulseWidth Modulatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D27/00G06F1/20F04D27/02
CPCF04D27/02H02P29/00H02P6/08H02P6/20H02P6/008F04D27/00F04D27/004G06F1/206F01P7/048H02P7/29G06F1/20H05K7/20H02P6/26Y02B30/70
Inventor 马文川郭柏村蔡明熹黄文喜
Owner DELTA ELECTRONICS INC
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