Invention Grant
- Patent Title: High efficiency permanent magnet machine
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Application No.: US14449208Application Date: 2014-08-01
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Publication No.: US09780608B2Publication Date: 2017-10-03
- Inventor: Xinzhang Wu , Hanzhou Liu , Yang Hu , Louis Chow , Jon Harms , Martin Epstein , Wei Wu
- Applicant: Xinzhang Wu , Hanzhou Liu , Yang Hu , Louis Chow , Jon Harms , Martin Epstein , Wei Wu
- Agency: Smith & Hopen, P.A.
- Agent Nicholas Pfeifer
- Main IPC: H02K21/16
- IPC: H02K21/16 ; H02K1/16 ; H02K1/27 ; H02K3/12 ; H02K3/28 ; H02K21/14 ; H02P6/182 ; H02P6/15

Abstract:
The present invention is a high efficiency permanent magnet machine capable of maintaining high power density. The machine is operable over a wide range of power output. The improved efficiency is due in part to copper wires with a current density lower than traditional designs and larger permanent magnets coupled with a large air gap. In a certain embodiment wide stator teeth are used to provide additional improved efficiency through significantly reducing magnetic saturation resulting in lower current. The machine also has a much smaller torque angle than that in traditional design at rated load and thus has a higher overload handling capability and improved efficiency. In addition, when the machine is used as a motor, an adaptive phase lag compensation scheme helps the sensorless field oriented control (FOC) scheme to perform more accurately.
Public/Granted literature
- US20140340011A1 HIGH EFFICIENCY PERMANENT MAGNET MACHINE Public/Granted day:2014-11-20
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