Brushless DC motors have lower power consumption, long life, low noise, compact dimensions and low weight characteristics. Nidec is a world leader in the development and production of these high-performance motors. Commutator DC motors have a number of advantages, such as high efficiency, shrinkage potential, mains operation capability and low production costs. However, these motors have a number of disadvantages, such as brush friction noise, sparks, electrical noise, and limited brush wear life. The development of a brushless DC motor has solved all these problems. In an AC DC motor, the permanent magnet rotor is driven by the magnetic force of the stator circuit winding. While the DC motor uses a brush and commutator for current switching, the brushless DC motor uses a sensor and electronic circuit for current switching. The development of this motor was made possible by the development of semiconductors and peripherals. The motor has the characteristics of DC motors (current and voltage are proportional to the torque and speed of rotation) of its AC motors. Features of the brushless DC motor include compact size, high performance, long life, no sparks generated and noise: They are used in a wide range of applications from computers to home appliances.