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DC Fan function test
Date：2020/4/1 Views：1548 【BACK】
We know that the common DC fan has a variety of special functions, can detect, protect and control the fan. The common DC fan hot fan has the soft start function, the alarm function, the PWM speed regulation function. Here's how these functions are implemented. We take a DC fan in Dongxingyue as an example. Dongxing Yue fan has 2 lines for red positive and black negative, three lines of red positive, black negative, gray alarm RD signal, four lines red positive, black negative, gray alarm RD signal, blue line PWM intelligent speed regulation. Soft start function for example, DF1225B48L-AF42SRP7-V0 is a type of standard fan, SS means the fan has soft start function. Soft start is anti-shock current protection IR function, soft start function refers to the fan power, speed from zero slowly rise to rated speed, about 3-10 seconds, the current is also from zero slowly rise to rated current range. 2, Rd alarm function RD operation signal pin output low level, when the rotor block output high level; RDb (RDL) the opposite. The peripheral equipment detects high and low levels to determine whether the wind is in operation or not. R is usually used in the model. For example, DF1225B48L-AF42SRP7-V0.3, PWM speed control function pulse width speed regulation, frequency from 20HZ-30KHZ. The high-level voltage range can range from 2.5 V-20V, and the low-level range is less than 0.5 v. The speed regulation is through a fixed frequency pulse, adjust its width to change the fan speed, 6 common curve mode as shown in the following figure, of course, can also be customized, duty ratio VS speed relationship. The above is the introduction of the DC fan function test, if you need a DC fan can understand the Dongxingyue. To learn more about DC FANS, click: http://www.dxymotors.com
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