Nature and measurements of torque ripple of permanent-magnet adjustable-speed motors

Conference · Tue Aug 01 00:00:00 EDT 1995

OSTI ID:100261

Hsu, J S; Scoggins, B P; Scudiere, M B; Marlino, L D; Adams, D J; Pillay, P

Torque ripple of permanent-magnet motors can be classified into four types depending on the nature of their origin. The four types are pulsating torque, fluctuating torque, reluctance cogging torque, and inertia and mechanical system torque. Pulsating torques are inherently produced by the trapezoidal back-emf`s and trapezoidal currents used in certain permanent-magnet adjustable-speed motors. The torque ripples caused by pulsating torques may be reduced by purposely produced fluctuating counter torques. Air-gap torque measurements are conducted on a sample motor. Experimental results agree with theoretical expectations.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 100261
• Report Number(s): CONF-9503180-1; ON: DE95016358
• Resource Relation: Conference: Applied power and electronics conference and exposition, Dallas, TX (United States), 5-9 Mar 1995; Other Information: PBD: [1995]
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
ELECTRIC MOTORS
PERMANENT MAGNETS
TORQUE
MEASURING METHODS
ELECTROMOTIVE FORCE
CALCULATION METHODS