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Brushless Motors

A brushless DC (BLDC) motor derives its "brushless" distinction from the motor's unique design, which requires no point of electrical or mechanical contact between the source voltage and the rotating component of the motor. Because there is no point of electromechanical contact in brushless motors they are virtually maintenance free, and motor life is limited only by the life of the rotor bearings. Additionally, because there is very low or no electromagnetic interference (EMI) or radio frequency interference (RFI), brushless motors can be utilized in sensitive or explosive environments.

What is slotless ???

Most brushless DC motors are designed using the conventional 'slotted' stator. The slotted stator is a lamination that has a series of teeth, with slots between the teeth into which the stator windings are inserted. The slotless design consists of a basket winding inserted into a ring lamination containing no teeth or slots.

Advantages of slotless motors are:

• Design yields smooth rotation, virtually eliminating cogging
• Better motor response
• 54% less weight than slotted design
• Smooth rotation
• Flexible designs support 'plug-and-play' capabilities
• Lower internal resistance - no "cogging" effect
• Electrically more efficient design (less voltage is required to achieve the same amount of power)
• Lower magnetic losses, thus lower heat
• Lighter design