title: Unbalance response analysis and experimental validation of an ultra high speed motor-generator for microturbine generators considering balancing.
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.
authors.affiliation: Electric Motor Research Center, Korea Electrotechnology Research Institute, Boolmosangil 70, Changwon 641-120, Korea. dkhong@keri.re.kr.
authors.forename: Do-Kwan
authors.initials: DK
authors.lastname: Hong
authors.affiliation: Electric Motor Research Center, Korea Electrotechnology Research Institute, Boolmosangil 70, Changwon 641-120, Korea. june@keri.re.kr.
authors.forename: Dae-Suk
authors.initials: DS
authors.lastname: Joo
authors.affiliation: Electric Motor Research Center, Korea Electrotechnology Research Institute, Boolmosangil 70, Changwon 641-120, Korea. bcwoo@keri.re.kr.
authors.forename: Byung-Chul
authors.initials: BC
authors.lastname: Woo
authors.affiliation: Electric Motor Research Center, Korea Electrotechnology Research Institute, Boolmosangil 70, Changwon 641-120, Korea. dhk371@keri.re.kr.
authors.forename: Dae-Hyun
authors.initials: DH
authors.lastname: Koo
authors.affiliation: Department of Mechanical Engineering, Dong-A University, Saha-gu, Busan 604-714, Korea. cwahn@dau.ac.kr.
authors.forename: Chan-Woo
authors.initials: CW
authors.lastname: Ahn