• Title, Summary, Keyword: In-wheel motor

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Parallel Running of Induction Motor by Anti-slip Controller of Inertia Conversion (관성변화시의 Anti-slip 제어기에 의한 유도전동기 병렬운전)

  • Jeon, Kee-Young;Kim, Jung-Gyo
    • Proceedings of the KIEE Conference
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    • pp.877-878
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    • 2006
  • In electric motor coaches, the rolling stocks move by the adhesive effort between rail and driving wheel. Generally, the adhesive effort is defined by the function of both the weight of electric motor coach and the adhesive effort between rails and driving wheel. The characteristics of adhesive effort is strongly affected by the conditions between rails and driving wheel. When the adhesive effort decreases suddenly, inertia conversion the electric motor coach has slip phenomena. This paper proposes a anti-slip control algorithm which uses the maximum adhesive effort by instantaneous estimation of adhesion force using load torque disturbance observer. Based on this estimated adhesive effort, the anti-slip control is performed to obtain the maximum transfer of the tractive effort.

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A Study on Shape Optimization of Cooling Channel in Hollow Shaft for In-wheel Motor (대용량 인휠 모터용 중공축 냉각유로의 형상 최적화에 관한 연구)

  • Lim, Dong Hyun;Kim, Dong-Hyun;Kim, Sung Chul
    • Transactions of the Korean Society of Automotive Engineers
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    • v.21 no.6
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    • pp.72-80
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    • 2013
  • For the proper cooling of in-wheel motor, the cooling channel should have the characteristics which are low pressure drop and adequate cooling oil supply to motor part. In this study, the flow performance of cooling channel for in-wheel motor was evaluated and the shape of the channel was optimized. First, the pressure drop and flow distribution characteristics of the initial channel model were evaluated using numerical analysis. Also, by the result of analysis and design modification, 4 design parameters of the channel were selected. Second, using the Taguchi optimal method, the cooling channel was optimized. In the method, nine models with different levels of the design parameters were generated and the flow characteristics of each models was estimated. Base on the result, the main effect of the design parameters was founded and optimized model was obtained. For the optimized model, the pressure drop and oil flow rate were about 0.196 bar and 0.207 L/min, respectively. The pressure drop decreased by about 0.3 bar and the oil flow rate to the motor part increased by about 0.2 L/min compared to the initial model.

Dynamic Performance Analyzing of In-wheel Vehicle considering the Real Driving Conditions and Development of Derivation System for Applying Dynamometer Using Drive Motor's Dynamic Load Torque (실차 주행 조건을 고려한 인휠 차량 거동 해석 및 동력 시험계 부하 토크 인가를 위한 구동 모터의 동적 부하 도출시스템 개발)

  • Son, Seungwan;Kim, Kiyoung;Cha, Suk Won;Lim, Won Sik;Kim, Jungyun
    • Transactions of the Korean Society of Automotive Engineers
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    • v.24 no.3
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    • pp.294-301
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    • 2016
  • This paper discusses about analyzing in-wheel vehicle's dynamic motion and load torque. Since in-wheel vehicle controls each left and right driving wheels, it is dangerous if vehicle's wheels are not in a cooperative control. First, this study builds the main wheel control logic using PID control theory and evaluates the stability. Using Carsim-Matlab/Simulink, vehicle dynamic motion is simulated in virtual 3D driving road. Through this, in-wheel vehicle's driving performance can be analyzed. The target vehicle is a rear-wheel drive in D-class sedan. Second, by using the first In-wheel vehicle's performance results, it derivate the drive motor's dynamic load torque for applying the dynamometer. Extracted load torque impute to dynamometer's load motor, linear experiment in dynamometer can replicated the 3-D road driving status. Also it, will be able to evaluate the more accurate performance analysis and stability, as a previous step of actual vehicle experiment.

A Study on the Evaluation of Machining States in the Cylindrical Plunge Grinding using the Current Signals of a Spindle Motor (주축모터전류신호를 이용한 원통 연삭시 가공 상태 평가에 관한 연구)

  • 송지복;이은상;김남훈
    • Journal of the Korean Society for Precision Engineering
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    • v.17 no.6
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    • pp.76-82
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    • 2000
  • This paper describes the machining characteristics of cylindrical plunge grinding. The study investigates the process using the current signals of a spindle motor through a hall sensor. Grinding experiments were conducted under various conditions such as wheel speeds, workpiece speeds and infeed rates with a conventional vitrified bonded wheel. Analyzing the current signal of the spindle motor, a relationship between current signals and the metal removal rate in terms of the in(red rate is induced. It was also shown that a hall sensor has similar capabilities in evaluation of grinding behavior compared to the AE signals, which are useful far monitoring the grinding process.

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BITSE Filter Wheel Assembly using a Piezo-ceramic module

  • Yang, Heesu;Choi, Seong-hwan;Kim, Jihun;Park, Jongyeob;Baek, Jihye;Kim, Yeon-Han;Newmark, Jeffrey;Gopalswamy, Nat
    • The Bulletin of The Korean Astronomical Society
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    • v.44 no.2
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    • pp.57.3-57.3
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    • 2019
  • Space applications of the motion have been served with DC motors for decades. But their functionality with a gearbox and lubricants and their weights are always an issue for its application. A piezo-motor has an advantage on the direct driving with higher accuracy, smaller size, and no-EMI. We use the piezo-motor to rotate a filter wheel directly in a balloon-borne coronagraph launched on September 2019. The piezo-motor works well in a temperature range from -10 to 40 Celsius with high reliability and high positioning / tilt accuracy (~0.1degree) with a photo-encoder. We verify its functionality for 7 days. In this talk, we report the design, test processes of the filter wheel including its balloon flight result.

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A control algorithm for driving stability improvement of in-wheel motors vehicle (인휠모터 차량의 주행 안정화 제어 알고리즘 연구)

  • Choe, Seung-Hoe;Kim, Jin-Sung;Heo, Hoon
    • Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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    • pp.206-211
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    • 2011
  • In this paper, a control algorithm for the improvement of yaw and velocity stability of electrical vehicle with two or four in-wheel motors is proposed. The vehicle is modeled with independently operative in-wheel motor wheels. Different frictions on the wheels are regarded as disturbances, which causes driving instability. In this situation the proposed algorithm enables stabilizing the yaw motion and velocity of vehicle simultaneously. The proposed PID controller is composed with two techniques, which enhance the disturbance reject and point tracking performances. One is nonlinear gain function and the other one is improved integral controller operating as time based weight function. Simulation is conducted to reveal its efficient performance.

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Optimal Design of an In-Wheel Permanent Magnet Synchronous Motor Using a Design of Experiment and Kriging Model (크리깅 기법을 이용한 휠인 영구자석 동기전동기의 최적 설계)

  • Jang, Eun-Young;Hwang, Kyu-Yun;Rhyu, Se-Hyun;Kwon, Byung-Il
    • Proceedings of the KIEE Conference
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    • pp.852-853
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    • 2008
  • This paper proposes an optimal design method for the shape optimization of the permanent magnets (PM) of an in-wheel permanent magnet synchronous motor (PMSM) to reduce the cogging torque considering a total harmonic distortion (THD) and a root mean square (RMS) value of back-EMF. In this method, the Kriging model based on a design of experiment (DOE) is applied to interpolate the objective function in the spaces of design parameters. The optimal design method for the PM of an in-wheel PMSM has to consider multi-variable and multi-objective functions. The developed design method is applied to the optimization for the PM of an in-wheel PMSM.

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Study on Maximum Adhesive Effort Estimation using Disturbance Observer (외란관측기를 이용한 최대 점착력 추정에 관한 연구)

  • Jun, K.Y.;Lee, S.H.;Oh, B.H.;Kang, S.U.;Lee, H.G.;Kim, Y.J.;Han, K.H.
    • Proceedings of the KIEE Conference
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    • pp.1120-1122
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    • 2001
  • In electric motor coaches, the rolling stocks move by the adhesive effort between rail and driving wheel. Generally, the adhesive effort is defined by the function of both the weight of electric motor coach and the adhesive effort between rails and driving wheel. The characteristics of adhesive effort is strongly affected by the conditions between rails and driving wheel. When the adhesive effort decreases suddenly, the electric motor coach has slip phenomena. This paper proposes a re-adhesion control algorithm which uses the maximum adhesive effort by instantaneous estimation of adhesion force using disturbance observer. Based on this estimated adhesive effort, the re-adhesion control is performed to obtain the maximum transfer of the tractive effort.

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A Study on Maximum Traction Effort Control with the Adhesive Effort Estimation (점착력 추정에 의한 최대 견인력 제어에 관한 연구)

  • Jun, K.Y.;Chung, J.H.;Kim, S.N.;Lee, S.H.;Oh, B.H.;Lee, H.G.;Kim, Y.J.;Han, K.H.
    • Proceedings of the KIEE Conference
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    • pp.1000-1002
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    • 2002
  • In electric motor coaches, the rolling stocks move by the adhesive effort between rail and driving wheel. Generally, the adhesive effort is defined by the function of both the weight of electric motor coach and the adhesive effort between rails and driving wheel. The characteristics of adhesive effort is strongly affected by the conditions between rails and driving wheel. When the adhesive effort decreases suddenly, the electric motor coach has slip phenomena. This paper proposes a re-adhesion control algorithm which uses the maximum adhesive effort by instantaneous estimation of adhesion force using disturbance observer. Based on this estimated adhesive effort, the re-adhesion control is performed to obtain the maximum transfer of the tractive effort.

  • PDF