• Title, Summary, Keyword: In-wheel motor

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Drive System of 25kW In Wheel Type IPMSM for Electric Vehicle (25kW급 EV용 InWheel Type IPMSM의 구동장치)

  • Kim, Y.K.;Yeom, J.H.;Lee, J.J.;Lee, J.J.;Hong, J.P.;Mok, H.S.
    • Proceedings of the KIPE Conference
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    • pp.518-519
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    • 2010
  • 본 논문에서는 EV용 25kW급 In Wheel Type의 IPMSM을 제어 할 수 있는 구동장치를 제작하였다. 여기서 In Wheel Motor는 고성능의 전기모터를 Wheel에 직접 장착하여 파워트레인 요소를 모두 제거함으로써 차량 시스템의 효율을 높이고, 친환경 차량에 적용할 수 있는 신개념의 플랫폼을 제공할 수 있는 고효율, 고성능 차량 시스템이다. 따라서 본 논문에서는 EV용 In Wheel Motor와 이를 제어하기 위한 구동장치에 대한 제어시스템을 제안하고 이를 실험을 통해 검증하였다.

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Optimal Power Distribution for an Electric Vehicle with Front In-line Rear In-wheel Motors (전륜 인라인 후륜 인휠 모터 적용 전기자동차의 최적 동력 분배)

  • Kim, Jeongmin
    • Transactions of the Korean Society of Automotive Engineers
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    • v.22 no.2
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    • pp.76-82
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    • 2014
  • In this paper, an optimal power distribution algorithm is proposed for the small electric vehicle with front in-line and rear in-wheel motors. First, it is assumed that the vehicle driving torque and velocity are given conditions. And, an optimal problem is defined that finding the front and rear motor torques which minimizes the battery power. From the above optimization problem, the optimized front-rear motor torque distribution map is obtained. And, the vehicle simulations are performed to verify the performance of the optimal power distribution algorithm which is proposed in this study. The simulations are performed based on the federal urban driving schedule for two cases which are constant ratio power distribution, and optimal power distribution. From the simulation results, it is found that the optimal power distribution shows the 6.3% smaller battery energy consumption than the constant ratio power distribution.

Slip Detection and Control Algorithm to Improve Path Tracking Performance of Four-Wheel Independently Actuated Farming Platform (4륜 독립구동형 농업용 플랫폼의 주행 궤적 추종 성능 향상을 위한 휠 슬립 검출 및 보상제어 알고리즘 연구)

  • Kim, Bongsang;Cho, Sungwoo;Moon, Heechang
    • The Journal of Korea Robotics Society
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    • v.15 no.3
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    • pp.221-232
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    • 2020
  • In a four-wheel independent drive platform, four wheels and motors are connected directly, and the rotation of the motors generates the power of the platform. It uses a skid steering system that steers based on the difference in rotational power between wheel motors. The platform can control the speed of each wheel individually and has excellent mobility on dirt roads. However, the difficulty of the straight-running is caused due to torque distribution variation in each wheel's motor, and the direction of rotation of the wheel, and moving direction of the platform, and the difference of the platform's target direction. This paper describes an algorithm to detect the slip generated on each wheel when a four-wheel independent drive platform is traveling in a harsh environment. When the slip is detected, a compensation control algorithm is activated to compensate the torque of the motor mounted on the platform to improve the trajectory tracking performance of the platform. The four-wheel independent drive platform developed for this study verified the algorithm. The wheel slip detection and the compensation control algorithm of the platform are expected to improve the stability of trajectory tracking.

Parallel Running of Induction Motor using Anti-slip Controller (Anti-slip 제어기를 이용한 유도전동기 병렬운전)

  • Kim, Jung-Gyo;Lee, Ju
    • The Transactions of the Korean Institute of Electrical Engineers P
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    • v.55 no.1
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    • pp.41-46
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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, 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.

Steering Wheel Torque Control of Electric Power Steering by PD-Control

  • Pang, Du-Yeol;Jang, Bong-Choon;Lee, Seong-Cheol
    • 제어로봇시스템학회:학술대회논문집
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    • pp.1366-1370
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    • 2005
  • As the development of microprocessor technology, electric power steering (EPS) system which uses an electric motor came to use a few years ago. It can solve the problems associated with hydraulic power steering. The motor only operates when steering assistance is needed, so it can save fuel and can reduce weight and cost by eliminating hydraulic pump and piping. As one of performance criteria of EPS systems, the transmissibility from road wheel load to steering wheel torque is considered in the paper. The transmissibility can be studied by fixing the steering wheel and calculating the torque needed to hold the steering wheel from road wheel load. A proportion-plus-derivative control is needed for EPS systems to generate desired static torque boost and avoid transmissibility of fluctuation. A pure proportion control can't satisfy both requirements.

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Analysis of Vibration Noise Spectrum in Motor-Driven Power Steering System (Motor-Driven Power Steering 시스템의 진동 소음 스펙트럼 분석)

  • Park, Han Young;Kim, Jin Young;Kang, Joonhee
    • Journal of Sensor Science and Technology
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    • v.27 no.2
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    • pp.126-131
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    • 2018
  • Unlike the hydraulic power steering (HPS) system, which operates by the high pressure of a fluid obtained from the engine power, the motor-driven power steering (MDPS) system uses an electric motor to steer the wheel without consuming engine power. To steer the wheel with an electric motor, a worm wheel and a worm gear rotating between the steering shaft and motor are required. Any imperfection during the construction of an MDPS system or in a composing part creates noise and vibration, which can be sensed by a driver. To solve the noise and vibration problems, each part must be designed to not resonate with other parts. In this work, we developed the measurement and analysis systems to obtain the noise and the vibration of an automobile MDPS system. A signal analyzer was equipped with a 96 kHz, 24-bit ADC and a 150 MHz digital signal processor. The predetermined threshold value of the vibration in the MDPS system was used to determine the pass/fail, and the results were displayed on the screen. Our system can be used in the fabrication line to swiftly determine any imperfections in the MDPS system construction.

Design of Outer Rotor Type In-Wheel SRM for Welfare Neighborhood Electric Vehicle (복지형 NEV용 외전형 In-Wheel SRM 설계)

  • Jeong, Kwang-Il;Lee, Dong-Hee;Ahn, Jin-Woo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.2
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    • pp.309-314
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    • 2011
  • Outer rotor type in-wheel switched reluctance motor for Welfare neighborhood electric vehicle is researched. In-wheel system is to drive the electric vehicle without mechanical transmission, shaft, differential gears or other mechanical system. To calculate drive power for each wheels, the elder's and disable's safety driving conditions are considered. The designed outer rotor SRM has a 6-stator and 8-rotor pole. The determined dimensions as well as the stator and rotor pole arc are simulated and tested with CAD and finite element analysis to verify the performance of the proposed motor.

Study on Motor Characteristics due to Deviation of the Wheel Diameters with Parallel Operation

  • Lee, Hyung-Woo
    • Journal of Electrical Engineering and Technology
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    • v.8 no.1
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    • pp.106-109
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    • 2013
  • It is desirable and advantageous to feed parallel propulsion with induction motors by a single voltage source inverter. However, effects of deviation of the wheel diameters on motor current, rotor speed and torque should be also considered for parallel operation. In order to understand the behavior and characteristics, a simple simulation model is developed by using a commercial Matlab Simulink. From the results, it is clear to manage the diameter deviation of the wheels which are connected to traction motors.