Turbine Load Set 조정을 위한 Digital Unit 개발

문용선,정호진,강성률,최형윤,Moon Yong-Seon,Jeong Ho-Jin,Kang Sung-Ryul,Choi Hyeong-Yoon 한국정보통신학회 2005 한국정보통신학회논문지 Vol.9 No.3

Turbine Load Set Motor장치는 노후화 된 화력 발전소에서 출력 부하를 결정하는 중요한 장치로서, Motor를 가변하면서 발전 출력 부하를 조정하게 된다. 이러한 종래 발전시스템에서는 Set Up Range를 운영자가 수동으로 조작한 Set Up값에 따라 Motor를 회전시키게 되며, Motor를 포함한 내부적 동작에 의해서 발전 출력 부하 결정이 이루어지게 된다. 따라서 본 논문에서는 수동적으로 출력부하를 작동되는 Turbine Motor Drive Unit를 대처할 수 있는 Digital Drive Unit 장치를 개발하여 기존 Turbine Load Set Motor 성능을 지닐 수 있는 장비를 구현한다. 또한 구현한 Digital Drive Unit을 바탕으로 발전 출력 부하를 결정하는 기본 기능을 기존 Motor Drive Unit과 연결하여 작동될 수 있도록 제어 알고리즘 구현과 구현된 제어 시스템을 통해 기존 Turbine Load Set Motor Drive와 연결 가능성을 확인한다. As important device that decide output load in superannuated thermoelectric power plant which do Turbine Load Set Motor device. This generation of electric power system operated Set Up Range Motor according to Set Up value that operator manufactures by hand circumvolve, and generation of electric power output load derision is consisted by internal action including Motor Therefore, in this research passively output load operated Turbine Motor Drive equipment that can have existing Turbine Load Set Motor Performance developing Digital Drive Unit device design. Also control algorithm implementation and existing Turbine Load Set Motor Drive and connection possibility through designed controlling system to connect basis function that decide development output load with Digital Drive Unit that designed also with existing Motor Drive Unit and can be operated.

MRAS Based Sensorless Control of a Series-Connected Five-Phase Two-Motor Drive System

M. Rizwan Khan,Atif Iqbal 대한전기학회 2008 Journal of Electrical Engineering & Technology Vol.3 No.2

Multi-phase machines can be used in variable speed drives. Their applications include electric ship propulsion, 'more-electric aircraft' and traction applications, electric vehicles, and hybrid electric vehicles. Multi-phase machines enable independent control of a few numbers of machines that are connected in series in a particular manner with their supply being fed from a single voltage source inverter (VSI). The idea was first implemented for a five-phase series-connected two-motor drive system, but is now applicable to any number of phases more than or equal to five-phase. The number of series-connected machines is a function of the phase number of VSI. Theoretical and simulation studies have already been reported for number of multi-phase multi-motor drive configurations of series-connection type. Variable speed induction motor drives without mechanical speed sensors at the motor shaft have the attractions of low cost and high reliability. To replace the sensor, information concerning the rotor speed is extracted from measured stator currents and voltages at motor terminals. Open-loop estimators or closed-loop observers are used for this purpose. They differ with respect to accuracy, robustness, and sensitivity against model parameter variations. This paper analyses operation of an MRAS estimator based sensorless control of a vector controlled series-connected two-motor five￢phase drive system with current control in the stationary reference frame. Results, obtained with fixed￢voltage, fixed-frequency supply, and hysteresis current control are presented for various operating conditions on the basis of simulation results. The purpose of this paper is to report the first ever simulation results on a sensorless control of a five-phase two-motor series-connected drive system. The operating principle is given followed by a description of the sensorless technique.

차세대 전동차 DDM 유지보수방안 연구

김영규(Kim young-kyu),박세영(Park se-young),이기수(Lee gi-su),송정훈(Song jeong-hun),이한민(Lee han-min) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월

Electric motor car's driving traction system for the latest train car has been developed from the DC series motor by resistance control and chopper control to the induction motor whose efficiency and maintenance are excellent by VVVF inverter control. In spite of this innovative development, as it is hard to expect more improvement than the existing system when it enters into technical maturity, Direct Drive Motor whose high maintenance free, efficiency, energy saving, low-noise and lightweight can be realized. This study examines and analyzes the maintenance system of existing electric motor car's traction motor operated by urban railway operation institutes and derives efficient maintenance methods through examining and analyzing the problems which can occur when applying maintenance method of next generation train's Direct Drive Motor.

Dynamic Performance Analysis for Different Vector-Controlled CSI- Fed Induction Motor Drives

Arul Prasanna Mark,Gerald Christopher Raj Irudaya,Rajasekaran Vairamani,Kaliamoorthy Mylsamy 전력전자학회 2014 JOURNAL OF POWER ELECTRONICS Vol.14 No.5

High-performance Current Source Inverter (CSI)- fed, variable speed alternating current drives are prepared for various industrial applications. CSI-fed Induction Motor (IM) drives are managed by using different control methods. Noteworthy methods include scalar Control (V/f), Input? Output Linearization (IOL) control, Field- Oriented Control (FOC), and Direct Torque Control (DTC). The objective of this work is to compare the dynamic performance of the aforementioned drive control methods for CSI-fed IM drives. The dynamic performance results of the proposed drives are individually analyzed through sensitivity tests. The tests selected for the comparison are step changes in the reference speed and torque of the motor drive. The operation and performance of different vector control methods are verified through simulations with MATLAB/Simulink and experimental results.

이중 상 동기전동기의 고효율 운전 전략

황대연,구본관 대한전기학회 2020 전기학회논문지 Vol.69 No.6

The dual three-phase permanent magnet synchronous motor drive system consist of dual three-phase inverter and dual three-phase stator winding set in motor. The dual drive-mode that utilizes dual stator winding set and dual three-phase inverter is commonly used for general operation. However, in order to improve the total efficiency of the drive system, it is also necessary to consider the efficiency of a single drive mode such as a conventional three-phase drive. In this paper, the high efficiency drive strategy of dual three-phase permanent magnet synchronous motor is proposed to utilize the highest efficiency point in each drive mode. Based on the analysis about efficiency for each drive-mode, the drive-mode changeover is proposed. The experimental results validate the proposed high efficiency drive strategy.

단일 스위치 기반의 4상한 운전 SRM 드라이브

하근수(Keunsoo Ha) 대한전기학회 2010 전기학회논문지 Vol.59 No.2

Low cost motor drives are being sought for high volume energy efficient home appliances. Key to the realization of such low cost motor drives is to reduce the power electronic converter in terms of its components, particularly the active devices, finding the motor with least complexity for manufacturing and a controller that could extract the desired performance from the machine and converter combination. These and other factors such as self-starting, speed control over a wide range and most of all the crowning aspect of a four quadrant operation with bare minimum number of controllable switch (or switches) remain as formidable challenges for low cost motor drive realization. In this paper, a four quadrant switched reluctance motor (SRM) drive with only one controllable switch is realized by using a two-phase machine. The theory and operation of the proposed four-quadrant SRM drive with the proposed control algorithm for its realization are described. The motor drive is modeled, simulated and analyzed to verify its feasibility for self-starting, speed control and for four quadrant operation and the simulation results are presented. Experimental results confirm the validity of the proposed control algorithm for four quadrant control of the SRM drive. The focus of the paper is mainly directed toward the control algorithm for realizing the four-quadrant operation of the two-phase SRM drive with a single controllable switch converter.

실시간 이더넷을 이용한 네트워크형 모터 드라이브의 구현 및 분석

성민영(Minyoung Sung),김강희(Kanghee Kim) 한국정보과학회 2011 정보과학회 컴퓨팅의 실제 논문지 Vol.17 No.8

실시간 이더넷은 고정밀 다중 모터 구동에 여러 가지 장점을 제공한다. 본 논문에서는 산업용 실시간 이더넷 표준인 EtherCAT을 이용한 모터 드라이브의 구현과 분석을 소개한다. 개발된 멀티태스크 소프트웨어와 네트워크 인터페이스의 특징을 고려하여 네트워크형 모터 드라이브의 모터 구동에 소요되는 지연시간을 분석한다. 그리고 이러한 지연 분석에 개발된 드라이브에서 실측한 태스크 실행시간을 입력하여 종단간 명령 지연과 비실시간 데이터 처리량을 분석하고 드라이브의 성능 특성을 논의한다. Real-time Ethernets offer several advantages for high-precision multi-motor actuation. This paper presents the implementation and analysis of a motor drive with EtherCAT, an industrial standard for real-time Ethernet. Considering the characteristics of the developed multitask software and the network interface, we analyze the delay of motor actuation for the networked motor drive. Using the delay analysis with the task execution times measured from the developed drive, we discuss the performance characteristics of the drive in respect of the end-to-end command delay and the maximum achievable throughput for non-realtime traffic.

Low Cost Motor Drive Technologies for ASEAN Electric Scooter

Tuan, Vu Tran,Kreuawan, Sangkla,Somsiri, Pakasit,Huy, Phuong Nguyen The Korean Institute of Electrical Engineers 2018 Journal of Electrical Engineering & Technology Vol.13 No.4

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.

Three‑phase and single‑phase motor drive system with single three‑phase two‑level inverter for independent speed control

Da-Hye Park,Min Kim,Wook-Jin Lee 전력전자학회 2022 JOURNAL OF POWER ELECTRONICS Vol.22 No.1

This paper presents a dual-motor drive system with a three-phase two-level inverter for independent speed control of a three-phase motor and a single-phase motor. The single-phase motor is connected in series between the neutral point of the three-phase motor and the midpoint of two split DC-link capacitors. As the single-phase motor current is a zero-sequence component flowing in the three-phase motor, it does not affect the operation of the three-phase motor. The proposed drive system can reduce the number of power switches compared with the conventional drive system that uses a single-phase and a three-phase inverter. Thus, the proposed system can reduce the cost of the drive system. Simulations and experiments are presented to verify the proposed drive system.

Low Cost Motor Drive Technologies for ASEAN Electric Scooter

V. Tran Tuan,S. Kreuawan,P. Somsiri,P. Nguyen Huy 대한전기학회 2018 Journal of Electrical Engineering & Technology Vol.13 No.4

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 escooter ranges are varied from 36 to 109 km depending on driving cycle, motor technology and number of passengers.