• Title/Summary/Keyword: Motor Point

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Shock analysis of a new ultrasonic motor subjected to half-sine acceleration pulses

  • Hou, Xiaoyan;Lee, Heow Pueh;Ong, Chong Jin;Lim, Siak Piang
    • Advances in Computational Design
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    • v.1 no.4
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    • pp.357-370
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    • 2016
  • This paper aims to examine the dynamic response of a newly designed ultrasonic motor under half-sine shock impulses. Impact shock was applied to the motor along x, y or z axis respectively with different pulse widths to check the sensitivity of the motor to the shocks in different directions. Finite Element Analysis (FEA) with the ANSYS software was conducted to obtain the relative displacement of a key point of the motor. Numerical results show that the maximum relative displacement is of micro meter level and the maximum stress is five orders smaller than the Young's modulus of the piezo material, which proves the robustness of the motor.

The Analysis of Strength and Driving Characteristic according to Design of Traction Motor for 8200 Electric Locomotive Series (8200호대 전기기관차 견인전동기의 설계에 따른 강도 및 운전특성 해석)

  • Lim, Chae-Woong;Yun, Cha-Jung;Kim, Jae-Moon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.64 no.1
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    • pp.165-170
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    • 2015
  • In this paper, The strength and driving characteristics of it were investigated according to developing the traction motor for 8200 electric locomotive series. For this purpose, Flux density strength was analyzed and then structural strength was investigated such as a stator frame, design of the rotor shaft bearing according to the design process. In addition, the traction motor operating point was analyzed according to slip frequency variation at a power source frequency. As the results of analysis on torque-speed characteristic curve, we was confirmed that traction motor was controlled as torque control prior to motor speed 1610[rpm], power control between 1610[rpm] and 2500[rpm] and breakdown torque control more than motor speed 2500[rpm].

Speed control of a induction motor system using digital control method (유도전동기의 디지탈 속도 제어)

  • 이충환;김상봉;하주식
    • 제어로봇시스템학회:학술대회논문집
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    • 1992.10a
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    • pp.987-992
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    • 1992
  • In recent years, induction motor is applied for several industrial actuatung parts instead of direct current motor because of the robust construction, nonexpensive and maintenance-free actuator etc. and having capability of speed control according to development of power electrounics and microprocessor techniques. In the paper, a microprocessor-based digital control approach for spped control of induction motor system is presented by considering a simple modelling equation as the system expression equation of induction motor and using the self tuning control and torque effdforward control method. As the model equation of the induction motor system, we use a second order differential equation which is well known in the modeling equation is induced form the control theory stand point such tath we can describe usually the motor system connected by inverter, generator and load etc. The effectiveness of the control system composed by the above mentioned design concept is illustrated by the expermental result in the presence of step reference change and generator load variation.

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Sensorless Speed Control of Induction Motor Using Observation Technique (관측기관을 이용한 유도전동기의 센서리스 속도제어)

  • 이충환
    • Journal of Advanced Marine Engineering and Technology
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    • v.23 no.1
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    • pp.96-102
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    • 1999
  • Sensorless speed estimation in induction motor systems is one of the most control engineers. Based on the estimated speed the vector control has been applied to the high precision torque control however most speed estimation methods use adaptive scheme so that it takes long time to estimate the speed. Thus the adaptive estimation scheme is not effective to the induction motor which requires short sampling time. In this paper a new linearized equation of induction motor system is proposed and a sensorless speed estimation algorithm based on observation techniques is developed. First the nonlinear induction motor equation is linearized at an equilibrium point. Second a proportional integral(PI) observer is applied to estimate the speed state in the induction motor system. Finally simulation results will assure the effectiveness of the new linearized equation and the sensorless estimation algorithm by using PI observer in the nonlinear induction motor system.

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A study on weight reduction design of induction motor for high speed train with driving pattern variations (운전패턴변화에 따른 고속전철용 견인전동기의 경량화설계에 관한 연구)

  • 김근웅;배동진;윤종학;이기호;한성수
    • Proceedings of the KSR Conference
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    • 1998.05a
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    • pp.458-465
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    • 1998
  • This paper presents an inverter-driven induction motor used as the traction motor for a high speed drive system that is required safety, reliability and performance and so on, In the respect of traction motor design, it is mainly showed the weight reduction inclination and characteristic investigation due to V/f driving pattern variation of inverter. Particularly, the reduction of V/f ratio pattern effects on the weight of traction motor and badly on the increase of phase current of traction motor in starting point. This method of weight reduction design have to be reached the decision with not only motor but also the consideration of inverter system because of the heat capacity, weight and material cost of inverter according to the increase of current.

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Excessive Condition Interpretation of a Exciter Circuit to Prevent Starting Failure of Large Synchronous Motor (대형 동기 전동기 기동실패방지를 위한 여자기회로 과도현상 해석)

  • Park, Jin-Hun;Cho, Ne-Su;Kwon, Woo-Hyen;Im, Soung-Hun;Yoon, Kyoung-Seop;Kim, Woo-Hyen
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.739-740
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    • 2006
  • According to the rapid growth of high speed and precise industry, the application of synchronous motor has been increased. In the application fields, the large synchronous motor is not a self-starting motor. The rotor is heavy and, from a dead stop, it is impossible to bring the rotor into magnetic lock with the rotating magnetic field for this reason, all synchronous motor have some kinds of starting device. A simple starter is another motor which brings the rotor up to approximately 96 percent of it synchronous speed. The starting motor is disconnected and the rotor locks in step with the rotating field. The more commony used starting method is to have the rotor to include a squirrel cage indution winding. This indution winding brings the rotor almost to synchronous speed as an induction motor. So, this paper describes excessive condition interpretation of a exciter circuit to prevent starting failure of large synchronous motor. the large synchronous motor needs safety of it in accordance with operating frequent start and stop. the operating Problem point of synchronous motor appears potential element damage of Exciter circuit because synchronous motor is caused synchronous separation. hence we eliminate it and improve starting toque.

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A Simplified Analysis Approach on the Rotor Position Detection Error in Sensorless Interior Permanent Magnet Brushless DC Motor Drives (센서리스 매입형 영구자석 브러시리스 직류전동기 구동장치에서 단순화된 회전자 위치검출 오차 분석 방법)

  • Lee, Kwang-Woon;Park, Tae-Sik
    • The Transactions of the Korean Institute of Power Electronics
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    • v.21 no.5
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    • pp.449-452
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    • 2016
  • This paper presents a simplified analysis on the rotor position detection error in sensorless interior permanent magnet brushless DC motor (BLDCM) drives, wherein terminal voltage sensing based on the back-electromotive force (back-EMF) zero-crossing point detecting circuitry is employed. The effect of a rotor saliency on the back-EMF's zero-crossing point detection is analyzed using the extended EMF-based voltage equation of the interior permanent BLDCM in a stationary reference frame, and thus the overall analysis is considerably simplified compared to the conventional one. Simulation results are provided to verify the effectiveness of the proposed method.

A Simulation of I-PDA Controller for Induction Motor

  • Choo, Yeon-Cyu;Kim, Seung-Cheol;Lee, Ihn-Yong;Cho, Yong-Sung
    • 제어로봇시스템학회:학술대회논문집
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    • 2005.06a
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    • pp.1521-1523
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    • 2005
  • PID controller is applied mostly to two-order system. In third-order or higher- system, it's impossible to get high response quality because of having more zero point than the number of zero point being in the PID controller. To solve those, Jung & Dorf suggested a new type of PIDA controller and solved problen of a third-order system.. But, as the result of getting step response using PIDA controller, rising time is very quickly but wide overshoot is happened. Beside designing PIDA controller with using CDM(Coefficient Diagram Method) of Shunji Manabe decreases overshoot to desired but rising time is very slow. Therefore this paper suggest a I-PDA controller for low overshoot and fast responsibility. This paper applied designed PD-PIDA controller to position control of 3-Phase induction motor.

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Effect of the Nano Ceria Slurry Characteristics on end Point Detection Technology for STI CMP (STI CMP용 가공종점 검출기술에서 나노 세리아 슬러리 특성이 미치는 영향)

  • 김성준;강현구;김민석;백운규;박재근
    • Journal of the Semiconductor & Display Technology
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    • v.3 no.1
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    • pp.15-20
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    • 2004
  • Through shallow trench isolation (STI) chemical mechanical polishing (CMP) tests, we investigated the dependence of pad surface temperature on the abrasive and additive concentrations in ceria slurry under varying pressure using blanket film wafers. The pad surface temperature after CMP increased with the abrasive concentration and decreased with the additive concentration in slurries for the constant down pressure. A possible mechanism is that the additive adsorbed on the film surfaces during polishing decreases the friction coefficient, hence the pad surface temperature gets lower with increasing the additive concentration. This difference in temperature was more remarkable for the higher concentration of abrasives. In addition, in-situ measurement of spindle motor was carried out during oxide and nitride polishing. The averaged motor current for oxide film was higher than that for nitride film, meaning the higher friction coefficient.

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Study on Water Pumping System using PV Array (태양전지를 이용한 Water Pumping 시스템 적용에 대한 연구)

  • Choi, Seong-Ho;Jho, Jeong-Min;Lee, Seung-Hwan;Lee, Sang-Jip;Kim, Sung-Nam;Han, Kyung-Hee
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.1251-1253
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    • 2000
  • This paper describes control of water pumping system using PV array. An integral part of the system with various system components be constructed PV array. maximum power point tracker BLDC motor and pump. BLDC motor has the quality of torque output and efficiency, has been more widely used in a field for multifarious application. However pumping system using PV array has limited for application because output characteristics of solar cell are greatly fluctuate on the variations of insolation, temperature and loads. For this reson, in this paper each parts efficiently contoroled by the maximum power point tracker, the vector control method of BLDC motor and the pressure PI controller using TMS320C- 31.

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