USE FAULTY HARD DISKS AS BRUSHLESS MOTOR, OPERATING PC HARD DISK MOTOR WITH ESC
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Brushless direct current motors are synchronous motors powered by direct current electricity through an inverter or switching power supply, which generates electricity in the form of alternating current to drive each phase of the motor through a closed loop controller. The controller supplies current pulses to the motor windings that control the speed and torque of the motor. This control system replaces the commutator used in many conventional electric motors.
The advantages of brushless motors over brushed motors are high power-to-weight ratio, high speed, almost instantaneous speed and torque control, high efficiency and low maintenance. Brushless motors are used in computer peripherals (disk drives, printers), handheld power tools, and vehicles ranging from model airplanes to automobiles. In modern washing machines, brushless DC motors have led to the replacement of rubber belts and gearboxes with a direct-drive design,
The brushed DC motor was invented in the 19th century and is still common. Brushless DC motors became possible with the development of solid state electronics in the 1960s.
The electric motor creates torque by keeping the magnetic fields of the rotor (the rotating part of the machine) and the stator (the stationary part of the machine) misaligned. One or both groups of magnets are electromagnets made of coil wire wrapped around an iron core. DC creates a magnetic field and gives the power to run the motor. Misalignment produces a torque that tries to realign the fields. As the rotor moves and the fields align, it is necessary to move the field of the rotor or stator to maintain misalignment and maintain torque and motion. The device that moves the fields according to the position of the rotor is called a commutator.
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