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The Motor Selection

The Motor Selection. Liping Zheng University of Central Florida. Motor Specifications. Must have high reliability. Efficiency is most important, volume and weight are also important. Alternative Motor Types (I). Permanent Magnet Synchronous Motor (PMSM)

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The Motor Selection

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  1. The Motor Selection Liping Zheng University of Central Florida

  2. MotorSpecifications • Must have high reliability. • Efficiency is most important, volume and weight are also important.

  3. AlternativeMotorTypes (I) • Permanent Magnet Synchronous Motor (PMSM) • Has high power density and high efficiency. • Can obtain high efficiency due to no copper loss associated with motor excitation. • Requires rotor position measurement for high efficiency operation. • Brushless DC Motor (BLDC) • Also has high power density and no copper loss associated with motor excitation. • Has high iron loss at high speed comparing with PMSM.

  4. AlternativeMotorTypes (II) • Wound-Field Synchronous Motor • High power application. Not good for speed higher than 25krpm because of rotating windings, slip rings, and brushes. • Switched Reluctance Motor (SRM) • Provides fault tolerance. Has high losses and low efficiency at high speed. • Induction Motor (IM) • Low cost alternative to PMSM. Larger in size than PM motor but close to PMSM in efficiency. • Asynchronous motor, need speed control.

  5. Motors available • Turbocor • PMSM with magnetic bearing • 140hp (104kW) @ 48Krpm • Electrodynamics associates inc. • Induction motor. Under development. • 200kw @ 62Krpm (160kw @ 50Krpm) • Efficiency >95%.

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