![]() ![]() ![]() The controller adjusts the phase and amplitude of the DC current pulses to control the speed and torque of the motor. ![]() It uses an electronic closed loop controller to switch DC currents to the motor windings producing magnetic fields which effectively rotate in space and which the permanent magnet rotor follows. ![]() The two coils on the printed circuit board interact with six round permanent magnets in the fan assembly.Ī brushless DC electric motor ( BLDC motor or BL motor), also known as an electronically commutated motor ( ECM or EC motor) or synchronous DC motor, is a synchronous motor using a direct current (DC) electric power supply.
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