Analysis of high speed induction motor for spindle made by copper die casting process

International Journal of Precision Engineering and Manufacturing volume 13, pages2251–2257 (2012)Cite this article

Abstract

This paper deals with the analysis techniques of a high speed and high efficiency 10 kW, 30,000 rpm rated induction motor. The induction motor has been analyzed by time-varying magnetic finite element method and the test results show that there is a possibility that the motor could be used in a high speed spindle system application. All performances of the prototype are successfully verified. All analysis techniques are introduced to develop a high speed and high efficiency induction motor of copper die casting. The analysis techniques are composed of an electrical technique (magnetic analysis), and a mechanical technique (casting analysis, structural analysis, critical speed analysis and unbalance response analysis). Simulation results are compared with the experiment, and are within a 3% deviation.

Abstract Korea

본 논문은 10kW, 30,000rpm 정격의 유도전동기에 대한 고속·고효율의 해석기법을 다룬다. 유도 전동기는 시변 자기 유한 요소법으로 해석되었으며 시험 결과 고속 스핀들 시스템 응용 분야에서 전동기가 사용될 가능성이 있음을 보여줍니다. 프로토타입의 모든 성능이 성공적으로 검증되었습니다. 구리 다이캐스팅의 고속, 고효율 유도 전동기를 개발하기 위해 모든 해석 기술이 도입되었습니다. 해석기법은 전기적 기법(자기해석)과 기계적 기법(주조해석, 구조해석, 임계속도해석, 불평형응답해석)으로 구성된다. 시뮬레이션 결과는 실험과 비교되며 3% 편차 이내입니다.

Fig. 1 The several techniques for copper die casting induction motor
Fig. 1 The several techniques for copper die casting induction motor
Fig. 2 Rotor model (bearing stiffness, left: 1e8N/m, right: 8e7N/m)
Fig. 2 Rotor model (bearing stiffness, left: 1e8N/m, right: 8e7N/m)
Fig. 3 Prototype and thermal-fluid analysis
Fig. 3 Prototype and thermal-fluid analysis
Fig. 4 The analysis results according to plunger-low speed
Fig. 4 The analysis results according to plunger-low speed
Fig. 5 CT scan and lathe work
Fig. 5 CT scan and lathe work
Fig. 6 The flux line and the magnetic flux density distribution
Fig. 6 The flux line and the magnetic flux density distribution
Fig. 7 The output power analysis result of induction motor by 2D finite element method
Fig. 7 The output power analysis result of induction motor by 2D finite element method
Fig. 8 The torque analysis result of induction motor by 2D finite element method
Fig. 8 The torque analysis result of induction motor by 2D finite element method
Fig. 9 The three phase current analysis result of induction motor by 2D finite element method (each color show the three current)
Fig. 9 The three phase current analysis result of induction motor by 2D finite element method (each color show the three current)
Fig. 10 The dynamo-system setup for motor performance test
Fig. 10 The dynamo-system setup for motor performance test
Fig. 15 von-Mises stress (σeqv) distribution (60,000 rpm)
Fig. 15 von-Mises stress (σeqv) distribution (60,000 rpm)

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Keywords

  • Casting analysis
  • Magnetic analysis
  • CT scan
  • Copper die casting high speed Induction motor for spindle
  • Critical speed analysis
  • Unbalance response analysis
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