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Sensors 2014, 14(9), 16117-16127; doi:10.3390/s140916117

Unbalance Response Analysis and Experimental Validation of an Ultra High Speed Motor-Generator for Microturbine Generators Considering Balancing

1
Electric Motor Research Center, Korea Electrotechnology Research Institute, Boolmosangil 70, Changwon 641-120, Korea
2
Department of Mechanical Engineering, Dong-A University, Saha-gu, Busan 604-714, Korea
*
Author to whom correspondence should be addressed.
Received: 1 April 2014 / Revised: 19 July 2014 / Accepted: 25 August 2014 / Published: 29 August 2014
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Abstract

The objective of the present study was to deal with the rotordynamics of the rotor of an ultra-high speed PM type synchronous motor-generator for a 500 W rated micro gas turbine generator. This paper introduces dynamic analysis, and experiments on the motor-generator. The focus is placed on an analytical approach considering the mechanical dynamic problems. It is essential to deal with dynamic stability at ultra-high speeds. Unbalance response analysis is performed by calculating the unbalance with and without balancing using a balancing machine. Critical speed analysis is performed to determine the operating speed with sufficient separation margin. The unbalance response analysis is compared with the experimental results considering the balancing grade (ISO 1940-1) and predicted vibration displacement with and without balancing. Based on these results, a high-speed motor-generator was successfully developed. View Full-Text
Keywords: motor-generator for micro turbine; unbalance response analysis; orbit diagram; critical speed; with and without balancing; rotor dynamics motor-generator for micro turbine; unbalance response analysis; orbit diagram; critical speed; with and without balancing; rotor dynamics
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Hong, D.-K.; Joo, D.-S.; Woo, B.-C.; Koo, D.-H.; Ahn, C.-W. Unbalance Response Analysis and Experimental Validation of an Ultra High Speed Motor-Generator for Microturbine Generators Considering Balancing. Sensors 2014, 14, 16117-16127.

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