16,000-rpm Interior Permanent Magnet Reluctance Machine with Brushless Field Excitation

Conference · Mon Dec 31 23:00:00 EST 2007

OSTI ID:945333

Hsu, John S ^[1]; Burress, Timothy A ^[1]; Lee, Seong T ^[1]; Wiles, Randy H ^[1]; Coomer, Chester ^[1]; McKeever, John W ^[1]; Adams, Donald J ^[1]

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1. ORNL

This paper introduces a high speed brushless field excitation (BFE) machine that offers high torque per ampere (A) per core length at low speed and weakened flux at high speed. Lower core losses at high speeds, are attained by reducing the field excitation. Safety and reliability are increased by weakening the field when a winding short-circuit fault occurs. For a high-speed motor the bridges that link the rotor punching segments together must be thickened for mechanical integrity; BFE can ensure sufficient rotor flux when needed. Projected efficiency map including losses of the excitation coils confirms the advantage of this technology.

• Research Organization: Oak Ridge National Laboratory (ORNL); Power Electronics and Electric Machinery Research Facility
• Sponsoring Organization: EE USDOE - Office of Energy Efficiency and Renewable Energy (EE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 945333
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DESIGN
EXCITATION
MOTORS
PERFORMANCE
PERMANENT MAGNETS
RELIABILITY
ROTORS
SAFETY
TORQUE