• Title/Summary/Keyword: Electric Drive

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Dynamic response for electromechanical integrated toroidal drive to electric excitation

  • Xu, Lizhong;Hao, Xiuhong
    • Structural Engineering and Mechanics
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    • v.26 no.6
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    • pp.635-650
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    • 2007
  • In this paper, the equivalent exciting force caused by electric excitation is derived. By dividing load and displacement vectors into mean values and time-varying ones, the dynamic equations of the system are transformed into linear ones for time-varying portion of the displacements. The analytical equations of the forced time responses of the drive system to electric excitations are obtained. Using the Laplace transformation, the transfer function of the drive system is obtained. These equations are used to analyze the time and frequency responses of the drive system to the electric excitation. It is known that electric excitation can cause forced responses of the drive system, the total dynamic responses are decided by three phase exciting voltages, exciting frequency and natural frequencies of the drive system, and the drive parameters have obvious influence on the time and frequency responses.

Development of traction drives for electric machine (전동머신을 위한 마찰 드라이브 개발)

  • 노수영;김배진;오세훈;전한수;김진남
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2004.10a
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    • pp.101-105
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    • 2004
  • The traction drive have a high power transmission efficiency and small size, a light weight, a low noise. So it is expected that alternative drive part of engine. Because it is necessary stillness that essential condition of drive part used moving tool in a room, it has many-sided in field of application. This traction drive is better suitable than other speed reducer as drive part of electric wheelchair. Also it is sufficiently necessary capacity of existing advanced product as apply traction drive to electric wheelchair.

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Sensorless control of Switched Reluctance Motor for Electric AC Compressors of Electrical Vehicles (전기자동차 용 전동식 컴프레서를 위한 스위치드 릴럭턴스 모터의 센서리스 제어)

  • Jeon, Yong-Hee;Kim, Jaehyuck
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.28 no.10
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    • pp.37-42
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    • 2014
  • This paper discusses study of sensorless control of a variable speed switched reluctance motor (SRM) for electric AC compressors on electrical vehicles. A typical SRM drive requires a position sensor such as an encoder or hall sensor to measure the angular rotor position. However, harsh environment in electrical AC compressors for electric vehicles makes it difficult to use the position sensor in their motor drive system. Therefore, a sensorless control scheme for electric compressor motors utilizing magnetic characteristics of SRM with respect to position angle and phase current is proposed. The overall variable speed SRM drive with position sensorless control scheme has been modeled using Matlab/Simulink software and closed loop current control simulation is presented to validate the proposed sensorless drive control.

Trend of the Recent Technology for the Vehicle with Motor Power Train (최근의 전동기 구동시스템을 가진 자동차의 기술개발 추이)

  • Ha, Hoi-Doo
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.1027-1029
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    • 2000
  • Electric vehicle(EV), hybrid electric vehicle(HEV) and fuel cell electric vehicle(FEV) are seen as one way of reducing the harmful effects of traffic and of improving energy efficiency. Therefore the status and developing trend of the EV, HEV and FEV are given in this paper. A major aspect of alternative drive trains is the electric drive train. The automotive aspect in developing electric drive trains is emphasized.

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Dynamics of electric system for electromechanical integrated toroidal drive under mechanical disturbance

  • Hao, Xiuhong;Xu, Lizhong
    • Interaction and multiscale mechanics
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    • v.2 no.2
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    • pp.189-207
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    • 2009
  • Dynamics of the electric system for the toroidal drive under mechanical disturbance is presented. Using the method of perturbation, free vibrations of the electric system under mechanical disturbance are studied. The forced responses of the electric system to voltage excitation under mechanical disturbance are also presented. We show that as the time grows, the resonance vibration caused by voltage excitation still exists and the vibrations caused by mechanical disturbance are enlarged. The coupled resonance vibration caused by mechanical disturbance and voltage excitation is discussed. The conditions of the occurrence of coupled resonance are studied.

Low Cost Motor Drive Technologies for ASEAN Electric Scooter

  • Tuan, Vu Tran;Kreuawan, Sangkla;Somsiri, Pakasit;Huy, Phuong Nguyen
    • Journal of Electrical Engineering and Technology
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    • v.13 no.4
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    • pp.1578-1585
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    • 2018
  • This work investigates two different motor drive technologies, switched reluctance motor (SRM) and induction motor (IM). They are designed optimally to meet the desired performances for electric scooters. The comparison of both motors is described in terms of performances and material cost. With the similar constraint, induction motor performs slightly better than switched reluctance motor. But this must be traded-off with higher weight and cost. Both drive systems are, however, suitable for electric scooter application. Finally, the range simulations are conducted on a European urban driving cycle, ECE15 driving cycle and a more realistic cycle, Bangkok driving cycle. The e-scooter ranges are varied from 36 to 109 km depending on driving cycle, motor technology and number of passengers.

Influence of Applied Electric Fields and Drive Frequencies on The Actuating Displacement of a Plate-type Piezoelectric Composite Actuator (평판형 압전 복합재료 작동기의 작동 변위에 미치는 인가전압 및 구동주파수의 영향)

  • Goo Nam-Seo;Woo Sung-Choong
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.30 no.5 s.248
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    • pp.576-584
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    • 2006
  • The actuating performance test of plate-type piezoelectric composite actuators having different lay-up sequences was experimentally carried out at simply supported and fixed-free boundary conditions. The actuating displacement of manufactured plate-type piezoelectric composite actuator (PCA) was measured using a non-contact laser displacement measurement system. Our results revealed that the actuating displacement with increasing applied electric field at a drive frequency of 1Hz increased non-linearly at the simply supported boundary condition whereas it almost linearly increased at the fixed-free boundary condition. On the other hand, the actuating displacement of piezoelectric composite actuator depended on the applied electric field in a drive frequency range from 1Hz to 10Hz, but its behavior was different in higher drive frequencies beyond 15Hz due to the occurrence of resonance. On the basis of the above experimental results, the bending characteristics of PCAs revealed different behavior depending on applied electric fields, drive frequencies as well as boundary conditions. Therefore, by investigating drive frequencies together with applied electric fields, actuating performance can be easily controlled and PCAs which were fabricated for this study will be sufficiently applied to pumping devices.

Motor Drive System Development of Hybrid Electric Air-con Compressor for HEV (하이브리드 차량을 위한 하이브리드 전동식 압축기 모터 드라이브 시스템 개발)

  • Jung, Tae-Uk;Park, Sung-Jun;Kim, Sung-Il;Hong, Jung-Pyo;Yun, Cheol-Ho;Cha, Hyun-Rok;Kim, Hyung-Mo
    • Proceedings of the KIEE Conference
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    • 2007.07a
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    • pp.1075-1076
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    • 2007
  • The HEV (Hybrid Electrical Vehicle) becomes commercialized recently because of high fuel efficiency and low air pollution. The highest output power system except the traction motor is an air conditioner compressor in HEV system. The full or hybrid electric compressor is applied for HEV. The general HEC (Hybrid Electric Compressor) requires the half power motor and drive system of the full electric compressor because the rated output power of motor drive system is designed to charge the minimum cooling capacity at the time of idle stop. Therefore, this hybrid electric is more economical and practical solution. In this paper, we studied about the motor drive system of hybrid electric compressor for HEV. The applied voltage specification is 42 V, an IPMSM (Interior Permanent Magnet Synchronous Motor) is designed and applied as the compressor drive motor.

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An examples of a 6-inch GTO inverter drive system applied for rougher mills

  • Kawasaki, Muneo;Okayama, Hideo;Koyama, Masato;Mitsuhashi, Masamichi;Masuda, Hiroyuki
    • 제어로봇시스템학회:학술대회논문집
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    • 1996.10a
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    • pp.25-28
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    • 1996
  • Recently, AC variable-speed motors are used for many steel rolling mill drive systems, because of their low maintenance and enhanced control performance. We have been applied GTO inverters for these AC motor drive systems since 1993. We have developed world largest 6-inch diameter GTO and large capacity 3-level GTO inverter up to 20000(kVA). As an example, in this paper, we describe the main circuit, system arrangement and control features of the 6-inches GTO inverters to drive rougher mills for hot strip mill of Pohang Iron & Steel Co., Ltd. The motor capacity is 6000(kW), and it's overload is 250(%).

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Development of a Simulation Model for an 80 kW-class Electric All-Wheel-Drive (AWD) Tractor using Agricultural Workload (농작업 부하 데이터를 활용한 80 kW급 전기구동 AWD 트랙터의 시뮬레이션 모델 개발)

  • Baek, Seung Yun;Kim, Wan Soo;Kim, Yeon Soo;Kim, Yong Joo;Park, Cheol Gyu;An, Su Cheol;Moon, Hee Chang;Kim, Bong Sang
    • Journal of Drive and Control
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    • v.17 no.1
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    • pp.27-36
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    • 2020
  • The aim of this study is to design a simulation model for an electric All-Wheel-Drive (AWD) tractor to evaluate the performance of the selected component and agricultural work ability. The electric AWD tractor consists of four motors independently for each drive wheel, and each motor is combined with an engine generator, a battery pack, and reducers. The torque data of a 78 kW-class tractor was measured during plow tillage and driving operation to develop a workload cycle. A simulation model was developed by using commercial software, Simulation X, and it used the workload as the simulation condition. As a result of simulation analysis, the drive system, including an electric motor and reducers, was able to cope with high load during plow tillage. The SOC (State of Charge) level was influenced by the output power of the motor, and it was maintained in the range of 50~80%. The fuel consumed by the engine was about 18.23 L during working on a total of 8 fields. The electric AWD tractor was able to perform agricultural work for about 7 hours. In the future study, the electric AWD tractor will be developed reflecting the simulation condition. Research on the comparison between the simulation model and the electric AWD tractor should be performed.