Machine Design

Permanent-Magnet Motors And Drives

The Ecoheart family of high-efficiency permanent-magnet motors and drives achieve 10% higher efficiency because internal power loss is reduced by 50%.

The high-performance magnets and a new method for winding the stator reduce motor volume by 50% and weight by 35%. The motors/drives employ sinusoidal motor-current waveform, instead of trapezoidal waveform, to achieve low-torque ripple, low vibration and acoustic noise, and reduced harmonics.

Hitachi America Ltd., Power and Industrial Div., 50 Prospect Ave., Tarrytown, NY 10591, (914) 631-0600, hitachi.us

TAGS: Technologies
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