#Dell 4 pin fan pinout Pc#

This fan is designed to be controlled with a PWM signal and increase or decrease its RPM. No matter what color the cable has, it will be plugged in the same motherboard connector! So, as you look from the key-side of the connector, number 1 is the most left pin: Thus, instead of using the colors to distinguish the function, better go with the connector that is standard. Two fans with 3-wire connectors may not have the same wire colors. It seems that for once more, the manufacturers did not have the same wire provider, or their wire providers did not have the same colored-plastic provider. The internal diagram of a typical three-wire fan is as follows: From the third wire, the motherboard can 'read' the tacho of the fan and see if the fan is running and with how many RPMs! It is a great innovation! If the motherboard sees no pulses or very low rpm, then the characteristic buzzer sounds to inform the operator that something is not ok. The fan is then connected to the motherboard. This output generates 2 pulses per one revolution of a fan. The third wire, comes directly from the output of the Hall sensor. The first two wires are the power supply of the fan. These fans introduced the 'tacho' for the first time.

#Dell 4 pin fan pinout Pc#

Yet another 3-wire PC fan with different wire colorsР”Р„ very common type of PC fan. Those with a 2-pin connector, those with a 3-pin connector and those with a 4-pin connector. There are actually 3 different types of PC fans. Instead, i will categorize them with the most obvious characteristic: their connector. So the motor type would not be the proper way to categorize PC fans. There are several reasons that a brushless motor should be used, among them is the reliability, the power efficiency and the rpm feedback. You can find it in the ' Theory of operation of brushless motors' page.Р”Р„s long as the motor is concerned, i suppose that all PC fans use brushless motors. I have written a detailed theory about brushless motors. It has the permanent magnets fixed on the rotor, the stator carries the coils, there are no brushes, it has a controller. It is more than obvious that the PC fan is not rotated from a simple DC motor. Removing the fins from the housing, the controller is revealed Anyway, let's see what's inside a PC fan: I suppose that the fan i chosen (and maybe many others) are NOT to be disassembled and re-assembled. Still i did not find any way of easy disassembling. During the disassembling, i broke some parts of the housing and a fin. I am not the right person to disassemble something for the first time due to lack of patience. Then i will explain some other common fans.Р”Р‡irst of all i had to disassemble the fan. The fan that i study is a 3-wire 4 coils 80mm fan rotating at 2200 rpm.

In this article, i will explain the basic and most common fan type. There are may types of PC fans that are assembled in different ways. Read the following article to learn how the BLDC PC Fans operates. They carry the heavy load to keep your PC cool and functional, either by providing fresh air in the box, or by forcing the hot air to leave a hot surface by pushing cool air. The vast majority of PCs has at least one of them.

Author: Giorgos Lazaridis How PC Fans Work