Bldc Motor

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Pages: 11

Category: Science and Technology

Date Submitted: 09/12/2016 07:34 PM

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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 here space and eight are critical factors.



The objective of the project as to design and built a quarter horsepower, brushless, direct current (BLDC), permanent magnet, three phase electric motor. Using knowledge acquired from various magnetic design and power classes the motor would be built using these theories and practices. This project required a lot of research as to the extent of what was possible and hat could be achieved within two quarters. The primary goal and focus was to be able to make a fully functioning motor.




A DC motor is a mechanically commutated electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore its current. The current in the rotor is switched by the commutator to also be stationary in space. This is how the relative angle between the stator and rotor magnetic flux is maintained near 90 degrees, which generates the maximum torque.

DC motors have a rotating armature winding (winding in which a voltage is induced) but non-rotating armature magnetic field and a static field winding (winding that produce the main magnetic flux) or permanent magnet. Different connections of the field and armature winding provide different inherent speed/torque regulation characteristics. The speed of a DC motor can be controlled by changing the voltage applied...