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Complete Set of DC Fan Speed Control Methods
Release time:
2020-01-08
First of all,DC FanExternal terminal voltage speed regulation: This speed regulation method is widely used in the earliest speed regulation scheme. Speed regulation is possible mainly because the DC fan has a wide voltage adaptation range. The DC fan has a wide voltage adaptation range and can work normally when the rated voltage is 50%, and the terminal voltage determines the speed. Therefore, most of the early speed control is like this. At the same time, this speed regulation method is simple and low cost.
Two isDC FanInternal logic control circuit speed control: add speed control signal to the DC fan to achieve speed control. The speed control signal may be a pulse width modulation signal, a Vsp signal, an adjustable resistor, a temperature control resistor, etc. This speed adjustment is up-to-date.
The advantages and disadvantages of the 3. two speed control modes are compared:
1. The advantages of terminal voltage speed regulation: the circuit is simple, only need to change the terminal voltage to achieve speed regulation, good speed regulation performance, low cost
2. Disadvantages of terminal voltage speed regulation: limited speed regulation range. The terminal voltage adjustment range must ensure the normal operating range of the DC fan (generally within 50% of the rated value). In many occasions where a wide speed range is required, this method cannot meet the speed regulation requirements.
The invention has the advantages of wide speed regulation range, basically can realize the speed regulation of the DC fan from 0 to the highest speed range, and will not affect the normal operation of the DC fan at the lowest speed.
4. The shortcomings of the internal logic control speed control method of the DC fan: the circuit structure is complex and the cost is high. Typically, the interface circuit will be designed integrally with the client circuit.
4. DC fan internal logic control speed control signal type: speed control signal input mainly includes pulse width modulation signal, voltage source voltage (VSP) speed control signal, adjustable resistor, temperature control resistor and other inputs. The specific type of input signal to be selected depends on the signal that can be given by the customer control system. Shenzhen Jiangshanlai Electronic Technology Co., Ltd. is a professional DC fan, cooling fan, brushless fan, bracket fan, supercharged cooling fan, micro cooling fan, blower and non-standard customized fan R & D, manufacturing, sales and service in one Large-scale enterprise, DC fan manufacturer, DC fan supplier wholesale. Products sell well in Guangdong, Shenzhen, Guangzhou, Dongguan, Fujian, Zhejiang, Jiangsu and other places.
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