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Accurate speed and slip measurement of induction motors


Ho, YS and Langman, RA, Accurate speed and slip measurement of induction motors, Journal of Electrical and Electronic Engineering Australia, 16, (1) pp. 73-79. ISSN 0725-2986 (1996) [Refereed Article]


Two alternative hardware circuits, for the accurate measurement of low slip in cage induction motors, are discussed. Both circuits compare the periods of the fundamental of the supply frequency and pulses from a shaft-connected toothed-wheel. The better of the two achieves accuracy to 0.5% of slip over the range 0.1 to 0.005, or better than 0.001% of speed over the range. This method is considered useful for slip measurement of motors supplied by either constant frequency mains or variable speed controllers with PWM waveforms. It is demonstrated that accurate slip measurement supports the conclusions of work previously done on the detection of broken rotor bars.

Item Details

Item Type:Refereed Article
Research Division:Engineering
Research Group:Control engineering, mechatronics and robotics
Research Field:Field robotics
Objective Division:Manufacturing
Objective Group:Machinery and equipment
Objective Field:Machinery and equipment not elsewhere classified
UTAS Author:Ho, YS (Mr Yiu Sum Ho)
UTAS Author:Langman, RA (Mr Richard Langman)
ID Code:7462
Year Published:1996
Deposited By:Electrical and Electronic Engineering
Deposited On:1996-08-01
Last Modified:2011-08-19

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