Abstract
Background/ Objectives: This paper aims to reliably evaluate the torque ripple of an optimal designed 3-phase induction motor using the measurement uncertainty theory. Methods/ Statistical analysis: The measurement uncertainty theory is statistically applied to the actual test. To apply the measurement uncertainty theory to the simulation result such as torque ripple, the type-A standard uncertainty can be calculated through the periodical calculation of torque ripple and the type-B standard uncertainty expressing non-statistical factors such as measurement environment, instrument or method is regarded as 0 in the uncertainty evaluation process. Findings: The general expression of torque ripple of an optimal designed 3-phase induction motor is not dependable because of the fluctuating torque at steady state. Therefore, in this paper, the uncertainty of the torque ripple is evaluated by using the type-A and the type-B standard uncertainty which is regarded as 0. As a result, the torque ripples before and after the optimal design are reliably evaluated in a specific confidence level. Also, it is known that the uncertainty can be easily applied to the torque ripple as well as other motor parameters such as power loss, output power density and so on. Improvements/ Applications: Since this paper deals with evaluation method of torque ripple of a 3-phase induction motor with respectively low torque ripple, it could be applied to motors with large torque ripple.
Highlights
Many papers and studies have dealt with the optimal design to reduce the torque ripple of motor [1, 2]
The 3-phase induction motor is selected to perform the optimal design for minimum torque ripple
In the FEM, type-B standard uncertainty can be regarded as 0 because accuracy of program is indubitable and there are no uncertain factors affecting the motor analysis except for dispersion of torque ripple, which is expressed by the type-A standard uncertainty
Summary
Many papers and studies have dealt with the optimal design to reduce the torque ripple of motor [1, 2]. The reduced torque ripple is the evaluation factor of the optimal design, and usually may not be same in the repeated measurement. Additional index is needed to ensure the reliability of expressing the torque ripple. For this purpose, the measurement uncertainty theory is applied in this paper. This paper presents a method to reliably evaluate the torque ripple of an optimal designed motor by applying the measurement uncertainty theory to the FEM. The torque ripple of the optimal designed 3-phase induction motor is evaluated using the presented method
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
