Brushless DC Motor (BLDC) Controller and Driver

Brushless DC (BLDC) motor overcomes the requirements for the mechanical commutator by changing the structure of the motor. The winding becomes the stator and the permanent magnet becomes part of the rotor. Brushless DC motors are widely used because electronic commutation replaces the traditional mechanics of brush friction on commutator to supply power to windings in armature of DC motor. Electronic commutation provides greater efficiency over conventional DC motors with improvements of 20 to 30% for motors running at the same speed and load.
Further, the BLDC motor is more durable. It retains its high performance while the efficiency and power of an equivalent conventional motor declines due to wear, causing poor brush contact, arcing between the brushes and the commutator dissipating energy, and dirt compromising electrical conductivity.

Brushless DC motor systems combine compact yet powerful brushless DC motors and high performance drivers to offer excellent energy savings and speed stability as well as a wide speed control range. With brushless DC motors you can downsize your application as the motors have slim bodies and provide high power due to permanent magnets being used in the rotor.

The brushless DC (BLDC) motor is also referred to as an electronically commutated motor. There are no brushes on the rotor and commutation is performed electronically at certain rotor positions. The stator magnetic circuit is usually made from magnetic steel sheets. One of the recently popular brushless motor control techniques is Field Oriented Control (FOC).