한국해양대학교

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개선된 직접토크제어에 의한 유도전동기의 센서리스 속도제어에 관한 연구

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dc.contributor.author 김덕기 -
dc.date.accessioned 2017-02-22T05:21:29Z -
dc.date.available 2017-02-22T05:21:29Z -
dc.date.issued 2009 -
dc.date.submitted 56904-11-11 -
dc.identifier.uri http://kmou.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002174540 ko_KR
dc.identifier.uri http://repository.kmou.ac.kr/handle/2014.oak/8585 -
dc.description.abstract Recent years, there is a great increase in application of Field Oriented Control(FOC) for speed and torque of industrial induction motor drives. This trend can be seen in various industries like Steel, paper and also various machinery tools etc. Among the various method of drive controls, Direct Torque Control (DTC) and Vector Control are considered most high performance induction motor drives. An induction motor based on DTC is being increasingly used in various industrial applications. DTC offers faster torque response, better speed control and lesser hardware costs in compared with vector controlled drives. However, the conventional DTC suffers from high torque ripple, current harmonics and low performance during torque transients. In this paper, an improved direct torque control technique of induction motor is presented. In comparison with the conventional DTC technique, a well-developed Space Vector Modulation(SVM) technique is applied for more accurate current control. The torque and flux magnitude are under control using each PI controller, thereby generating the voltage command for inverter control. To control the speed and torque for induction motor, the system usually necessitates an information of speed or flux of the motor. However, there are many problems in case of using speed or flux sensors. A sensor requires a mounting space on the motor, reduces the reliability, and increases cost of the drive system. Therefore the various sensorless control algorithms have been proposed for the elimination of speed or flux sensors. For most of those sensorless methods, the control performance in high speed range is good, but it is difficult to obtain satisfactory result in low speed region. This paper presents sensorless speed control system for induction motor drive with an improved DTC method. The system consists of closed loop stator flux and torque controller, speed and torque estimators, PI controllers, PWM(Pulse width modulation) technique, IGBT(Insulated gate bipolar transistor) voltage source inverter, and micro-processor. The motor speed is estimated by using differential operator based on flux calculator. The simulation and experimental results based on an improved DTC technique indicated good speed and load response from the low speed range to the high speed range. The torque and speed ripple could be reduced in comparison with the conventional switching table DTC method. -
dc.description.tableofcontents 1. 서론 = 1 1.1 연구배경 및 동향 = 1 1.2 연구 목적과 구성 = 4 2. 유도전동기의 수학적 모델 및 제어기법 = 6 2.1 유도전동기의 전압방정식 = 6 2.1.1 3상 좌표계에서의 유도전동기 전압방정식 = 7 2.1.2 동기 회전좌표계에서의 유도전동기 전압방정식 = 11 2.2 벡터제어 = 16 2.2.1 직접벡터제어 = 17 2.2.2 간접벡터제어 = 19 2.3 직접토크제어 = 24 2.3.1 직접토크제어 알고리즘 = 24 2.3.2 직접토크제어의 기본 개념과 이론 = 27 3. 유도전동기 센서리스 속도제어 방식 = 34 3.1 속도추정기에 의한 방식 = 34 3.2 모델기준적응제어에 의한 방식 = 36 3.3 칼만필터에 의한 방식 = 38 3.4 슬롯고조파 분석에 의한 방식 = 40 3.5 상태궤환 선형화 기법에 의한 방식 = 42 3.6 신경회로망을 이용한 방식 = 47 3.7 고주파 신호주입을 이용한 방식 = 50 4. 개선된 직접토크제어방식에 의한 센서리스 속도제어 시스템 = 54 4.1 공간벡터 PWM 전류제어기 = 54 4.2 제어 알고리즘 = 62 4.3 기존 직접토크제어방식과 개선된 직접토크제어방식 비교 = 65 5. 컴퓨터 시뮬레이션 = 73 5.1 개선된 직접토크제어방식의 시뮬레이션 = 73 5.2 시뮬레이션 결과 검토 = 75 6. 실험장치의 구성과 실험결과 = 79 6.1 구동시스템의 하드웨어 구성 = 79 6.2 실험결과 및 검토 = 84 7. 결론 = 90 참고문헌 = 92 -
dc.language kor -
dc.publisher 한국해양대학교 대학원 -
dc.title 개선된 직접토크제어에 의한 유도전동기의 센서리스 속도제어에 관한 연구 -
dc.title.alternative A Study on the Sensorless Speed Control of Induction Motor by an Improved Direct Torque Control Technique -
dc.type Thesis -
dc.date.awarded 2009-02 -
dc.contributor.alternativeName Kim -
dc.contributor.alternativeName Deok-Ki -
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기관시스템공학과 > Thesis
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