• Title/Summary/Keyword: Synchronous Position Control

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Precision Position Control of PMSM using Load Torque Observer and Parameter Compensator (외란관측기와 파라미터 보상기를 이용한 PMSM의 정밀위치 제어)

  • 고종선;이태훈
    • The Transactions of the Korean Institute of Power Electronics
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    • v.9 no.1
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    • pp.42-49
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    • 2004
  • This paper presents a new method of external load disturbance compensation using deadbeat load torque observer and gain compensation by parameter estimator. The response of the permanent magnet synchronous motor(PMSM) follows the nominal plant. The load torque compensation method is composed of a deadbeat observer. To reduce the noise effect, the post-filter implemented by moving average(MA) process is adopted. The parameter compensator with recursive least square method(RLSM) parameter estimator is suggested to make the new system work as same as the name plate system which in used to take gains. The proposed estimator is combined with a high performance load torque observer to resolve the problems. As a result, the proposed control system has a robust and precise system against the load torque and the parameter variation. A stability and usefulness are verified by computer simulation and experiment.

Integrated Sliding-Mode Sensorless Driver with Pre-driver and Current Sensing Circuit for Accurate Speed Control of PMSM

  • Heo, Sewan;Oh, Jimin;Kim, Minki;Suk, Jung-Hee;Yang, Yil Suk;Park, Ki-Tae;Kim, Jinsung
    • ETRI Journal
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    • v.37 no.6
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    • pp.1154-1164
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    • 2015
  • This paper proposes a fully sensorless driver for a permanent magnet synchronous motor (PMSM) integrated with a digital motor controller and an analog pre-driver, including sensing circuits and estimators. In the motor controller, a position estimator estimates the back electromotive force and rotor position using a sliding-mode observer. In the pre-driver, drivers for the power devices are designed with a level shifter and isolation technique. In addition, a current sensing circuit measures a three-phase current. All of these circuits are integrated in a single chip such that the driver achieves control of the speed with high accuracy. Using an IC fabricated using a $0.18{\mu}m$ BCDMOS process, the performance was verified experimentally. The driver showed stable operation in spite of the variation in speed and load, a similar efficiency near 1% compared to a commercial driver, a low speed error of about 0.1%, and therefore good performance for the PMSM drive.

A Study on the Sliding Mode Control of PMLSM using the Slate Observer (상태관측기에 의한 영구자석 선형동기전동기의 슬라이딩모드제어에 관한 연구)

  • 황영민;신동률;최거승;조윤현;우정인
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.16 no.2
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    • pp.71-80
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    • 2002
  • According to the rapid growth of high speed and precise industry, the application of synchronous motor has been increased. In the application fields, these fast dynamic response is of prime importance. In particular, since the PMLSM(Permanent Magnet Linear Synchronous Motor) has characteristics of high speed, high thrust, it has been used in high-performance servo drive. From these reasons, it is recently used for high precise position control, and machine tool. In this paper, a study of the sliding mode with VSS (Variable Structure System) design for a PMLSM is presented. For fast and precise motion control of PMLSM, the compensation of disturbance and parameter variation is necessary. Hence we eliminate the reaching phase use of VSS that is changed to switching function and vector control using the state observer. And we proposed to sliding mode control algorithm so that realize fast response without overshoot, disturbance and parameter variation.

Improved Responsiveness of Model-Based Sensorless Control for Electric-Supercharger Motor using an Position Error Compensation (위치 오차 보상을 통한 전동식 슈퍼차저 모터의 모델 기반 센서리스 응답성 개선)

  • Park, Gui-Yeol;Hwang, Yo-Han;Heo, Nam;Lee, Ju
    • The Transactions of the Korean Institute of Power Electronics
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    • v.24 no.1
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    • pp.9-15
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    • 2019
  • Sensorless electric superchargers have recently been actively developed to provide a large amount of oxygen to engines in order assist the combustion process for miniaturizing the engines and improving fuel efficiency. The model-based sensorless method for surface-mounted permanent magnet synchronous motors has a disadvantage in that the system may become unstable due to parameter variations in low-speed operation and the rapid-acceleration section. An electric supercharger requires fast response to improve the engine response delay, such as the turbocharger turbo-rack. Therefore, the responsiveness must be improved to use the model-based sensorless system. The position compensation algorithm designed in this study is controlled by converting the position error into the beta, which is the angle formed by the d-axis and the stator current during sudden speed change. In this study, we improved the response of the model-based sensorless system through the algorithm and verified the algorithm validity by applying the algorithm to an actual dual-motor supercharger.

Sensorless Control for Interior Permanent Magnet Synchronous Motor (IPMSM) using Disturbance Observer with Variable Cut-off Frequency (가변 필터 관측기를 이용한 IPMSM 센서리스 제어)

  • Lee, Jun-Ho;Lee, Hwa-Choon;Lee, Sung-Ho;Jung, Tae-Uk;Park, Sung-Jun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.25 no.1
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    • pp.78-84
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    • 2011
  • Using sensors to detect current or voltage of motors is disadvantaged because motor is exposed to vibration, impacts, corrosion, high temperature and humidity in the machinery structure like HEV. In the case of IPMSM, position information is included not only in the flux or EMF term but also in the rotator inductance because of its saliency. To solve this problem, a new mathematical model of IPMSMs on fixed frame is proposed and an extended EMF includiing rotating position information is defined to estimate extended EMF. A strong low-pass filter through the variable cut-off frequency using velocity function was proposed. This makes it is possible to estimate extended EMF by least order disturbance observer. The proposed method was proved through the experiment.

Design of Driver and Controller for micro Brushless DC Motor (초소형 Brushless DC Motor의 구동 및 제어기 설계)

  • Lee, Jong-Bae;Jeong, In-Sung;Lim, Joon-Hong
    • Proceedings of the KIEE Conference
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    • 2002.11c
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    • pp.329-332
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    • 2002
  • Recently, most machineries have been small size and mobile type. Then the motors used in this field are developed in micro size such as about 2mm in diameter. The structure of this motor is similar to a general brushless DC motor but because of small sige there is no position sensor such as hall sensor. In this paper, we propose synchronous driving and control method for micro brushless DC motor without position sensor. We design and manufacture this controller and perform experiment to show the effectiveness of the proposed method.

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Development of a PMSM Drive System for Industrial Sewing Machine (침상침하용 재봉틀을 위한 PMSM 구동시스템 개발)

  • Kim, Sang-Hoon;Park, Nae-Chun
    • Journal of Industrial Technology
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    • v.31 no.A
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    • pp.129-133
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    • 2011
  • In this paper, a surface mounted permanent magnet synchronous motor(SPMSM) drive system for industrial sewing machine was developed. Even through a lowr-esolution encoder is used for a low cost, using a full order observer enables to estimate accurate speed and position. And it also compensates a disturbance torque caused by the belt between a load and a motor. In order to control precisely stop positions of a needle, a speed trajectory is calculated from the acceleration pattern which is obtained from the position reference. The performance of the developed system is verified by experimental results.

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A Study of Sensorless Driving for The Axial Type Double Rotor Brushless DC Motor (축방향 이중 회전자 브러시리스 직류 전동기의 센서리스 구동에 관한 연구)

  • Won, Jae-Son;Kang, Tae-Sam;Hong, Sun-Ki
    • Proceedings of the KIEE Conference
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    • 1998.11a
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    • pp.168-170
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    • 1998
  • In this paper a driving method using the microcomputer in safe driving the axial type double rotor brushless DC motor without shaft position sensor is studied. The rotor position is determined from the back-EMF passed though special filter. Starting technique which uses the motor as a synchronous motor at standstill are explained. The motor speed is controlled by changing the duty cycle of PWM. The test motor has Y-connected three-phase stator and 8-pole axial type double rotor. From the experiments, we got good performences of the proposed control system.

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Precision Speed Control of PMSM for Stimulation of the Vestibular System Using Rotatory Chair (전정기관 자극용 회전자극기를 취한 PMSM의 정밀 속도제어)

  • 고종선;이태호;박병림;전칠환
    • The Transactions of the Korean Institute of Power Electronics
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    • v.5 no.5
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    • pp.459-466
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    • 2000
  • A new control method for precision robust speed control of a PMSM(Permanent Magnet Synchronous Motor) using load torque observer is presented. Using this system, we can more precisely evacuate of vestibular function. Until now a rotating chair system, so called 2D-stimulator, which has vertical rotate axis is used to make dizziness. However, an inclined rotating chair system witch is called 3D-stimulator is needed to obtain the precise dizziness data. This 3D-stimulator include unbalanced load caused by unbalanced center of mass. In this case, new compensation method is considered to obtain robust speed control using load torque observer. To reduce the effect of this disturbance, we can use dead-beat observer that has high gain. The application of the load to torque observer is published in for position control. However, there is a problem of using speed information such as amplifying effect of noise. Therefore, we can reduce a noise effect by moving average process. The experimental results are depicted in this paper to show the effect of this proposed algorithm.

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MICROPROCESSOR BASED SENSORLESS SPEED CONTROL OF PERMANENT MAGNET SYNCHRONOUS MOTOR (마이크로 프로세서를 이용한 영구자석 동기전동기의 센서리스 속도제어)

  • Choi, J.Y.;Kim, S.H.;Shin, J.K.;Kwon, Y.A.
    • Proceedings of the KIEE Conference
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    • 1995.11a
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    • pp.33-35
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    • 1995
  • Permanent magnet brushless motor is widely used in industrial drive applications due to high efficiency, high power ratio, and easy maintenance. Position and speed sensors required in this dolor increase the drive cost, and reduce the application range. Some papers present the sensorless speed control using DSP with a high processing performance. However, DSP increases the cost, and makes the implementation difficult. This study has performed the sensorless speed control with a microprocessor system which can be easily accessed.

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