• Title, Summary, Keyword: Motor Point

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MPPT Control of PV Water Pumping Using BLDC Motor-Inverter (BLDC 모터용 인버터를 이용한 PV 양수펌프의 MPPT 제어)

  • 김성남;백승길;조정민;이승환;오봉환;이훈구;한경희
    • The Transactions of the Korean Institute of Power Electronics
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    • v.6 no.6
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    • pp.498-505
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    • 2001
  • This paper shows how to design a global control of water pumping system using PV array, and tracked maximum power point of PV array only the inverter using the vector control of BLDC motor, and finding the relationships among the DC magnitudes and AC ones in order to omit the DC/DC converter. Conventional MPPT controller was unstable of reason of the ripple-current of DC link in three-phase invertor. Thus, in this paper the control algorithm of BLDC motor using $i_qs$ current is composed to improve the insecurity of conventional MPPT controller To prove the excellence of the proposed method, the contents of this paper is analyzed by means of simulation and testing for the results applying the method that J. A Domfnguez had applied to asynchronous motor to BLDC motor and that of the proposed method in this paper.

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

  • 이충환;김상봉;하주식
    • 제어로봇시스템학회:학술대회논문집
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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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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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    • 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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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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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].

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.

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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    • 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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Characteristics Analysis of a Synchronous Reluctance Motor according to the Flux Barrier Variation (동기형 릴럭턴스 전동기의 자속장벽 변화에 따른 특성 해석)

  • Shin, Jeong-Min;Yun, Jun-Bo;Kim, Sol;Choi, Jae-Hack;Lee, Ju
    • Proceedings of the KIEE Conference
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    • pp.927-929
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    • 2003
  • The rib in synchronous reluctance motor(SynRM), which has segment type rotor, is mechanical weak Point. To make up for the weak point, a web has inserted in the flux barrier. However, the inductance in the q-axis is increased and then the motor performance has been decreased because of the inserted web. This paper presents a model, which has permanent magnets on the both side of the web, to decrease the inductance in the q-axis. The finite element method is applied to analyze the characteristics.

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The F/S Concept Design for Solid Motor Thrust Vector Control (고체모터 추력제어를 위한 F/S 개념 설계)

  • Kim, Byung-Hun;Kwon, Tae-Hoon;Cho, In-Hyun
    • Aerospace Engineering and Technology
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    • v.7 no.1
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    • pp.170-176
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    • 2008
  • The concept design of Flexible Seal for thrust vector control of solid motor was performed. Through the concept design, the optimum pivot point of flexible seal, cross-section configuration of flexible seal and thermal protection system from combustion gas was decided. The pivot point of flexible seal has aft pivot type and cross-section view is conical type. For satisfying a spring torque rate, the shear modulus of rubber has the value of under about 0.6MPa and failure shear stress has over about 2.5MPa.

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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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