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Third wire signal wire of cooling fan

返回列表 Browse:315 Release date:2021-07-03 18:25:48【

The switching drive circuit design of the fan provides the measurement of speed: the fan motor has three wires (red wire: +, black wire: -, yellow wire: the third signal transmission wire)

The company provides the following two signal types

Type R (operation detector)

Type F (square wave generator)

The relationship between rotation and the output pulses of the third wire is as follows according to different products:

(a)1Rotation=2 Pulses(4 poles' motor)

(b)1Rotation=3 Pulses(6 poles' motor)

(c)1Rotation=4 Pulses(8 poles' motor)

remarks:

The normal 8-pole motor should be 1rotation=4 pulses; However, if there is a frequency division circuit design, it will be 1rotation=2pulses after frequency division

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