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.

Document Type

Patent

Patent Number

US 8,829,742 B2

Application Serial Number

14/146,059

Issue Date

9-9-2014

Current Assignee

Joint Assignment w/UCFRF: Maglev Energy, Inc.

Assignee at Issuance

Joint Assignment w/UCFRF: Maglev Energy, Inc.

College

College of Engineering and Computer Science (CECS)

Department

Electrical Engineering & Computer Science - ECE Division

Allowance Date

6-13-2014

Filing Date

1-2-2014

Assignee at Filing

Joint Assignment w/UCFRF: Maglev Energy, Inc.

Filing Type

Nonprovisional Application Record

Donated

no

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