High Performance Slotless Brushless DC Servo Motors0 pages

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High Performance Slotless Brushless DC Servo Motors

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AMETEK slotless brushless motor designs offer many advantages over conventional slotted stator

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construction. Negligible magnetic cogging provides improved servo efficiency and enables extremely

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smooth, quiet motion. Low inductance and high current bandwidth provides precise control. Slotless

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construction also provides excellent winding heat transfer for high thermal efficiency and transient load

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capacity. These motors are smaller, lighter and more efficient than brush motors with comparable

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outputs.

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AMETEK slotless brushless motors have no teeth to attract the magnets, cogging is eliminated, and the

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motor produces smooth, quiet rotation. The absence of teeth also provides room for larger and more

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wire in the windings, which means that slotless moters can generate more torque without a corre-

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sponding increase in size. Additionally, the slotless design significantly reduces damping losses. In both

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slotted and slotless motors, eddy currents are induced as the magnets pass the stator. However, these

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currents are weaker in slottless motors, because the distance between the stack and the magnets is

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greater than in slotted motors. This makes slotless brushless motors more efficient than slotted motors.

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PÍTTMAÑ

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