Winding and Connection of Four Slots Brushless DC Motor for Computer Chassis Fan

The four-slot brushless DC motor windings of the fan in the computer case are mostly in two groups, with the opposite group in opposite phase and the opposite slot in the same phase. Or the four slot windings are wound by ABAB. Most of the four-legged components use a model 276 driver IC with a built-in Hall sensor. Literally in their own direction, the pins are 1 power supply, 2 winding A, 3 winding B and 4 grounding in turn; The two windings are connected to the first leg (i.e. the power supply end). Related pictures Baidu find: brushless motor IC276.