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Brushless DC (BLDC) Motor Fundamentals

From Microchip Technology, Inc.

Brushless Direct Current (BLDC) motors are one of the motor types rapidly gaining popularity. BLDC motors are used in industries such as Appliances, Automotive, Aerospace, Consumer, Medical, Industrial Automation Equipment and Instrumentation. As the name implies, BLDC motors do not use brushes for commutation; instead, they are electronically commutated. BLDC motors have many advantages over brushed DC motors and induction motors. In addition, the ratio of torque delivered to the size of the motor is higher, making it useful in applications where space and weight are critical factors. In this application note, we will discuss in detail the construction, working principle, characteristics and typical applications of BLDC motors.
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Product Announcements
KNF Neuberger, Inc. - Vacuum Pump/Piston Compressor Combination
Where independent functions are needed, KNF will match a variety of pumps together on a common motor to save cost and size. Driven by an electronically commutated DC (BLDC) motor, this custom pump... (read more)
ARC Systems, Inc. - Brushless Motors
ARC Systems, Inc. offers a variety of Brushless DC Motors. Many of the limitations of the classic DC motor are due to the need for brushes to run against the commutator, eventually wearing itself out. (read more)
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