• Title/Summary/Keyword: Drive motor

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Driving System of 7-Phase BLDC Motor Speed Control by Fuzzy Controller (Fuzzy 제어기를 이용한 7상 BLDC 전동기 속도제어 구동시스템)

  • Yoon, Yong-Ho
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.11
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    • pp.1663-1668
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    • 2017
  • A BLDC motor with higher number of phases has several advantages, compared to the conventional three-phase BLDC motors. It can reduce the commutation torque ripple and the iron loss without increasing the voltage per phase and increase the reliability and power density. Higher number of phases increase the torque-per-ampere ratio for the same machine volume and output power by widening the electrical conduction period. In this paper, the proposed seven-phase BLDC motor drive system is made into several functional modular blocks, so that it can be easily extended to other ac motor applications: back-EMF block, hysteresis current control block, pwm inverter block, phase current block, and speed/torque control block. Also in a system of BLDC motor drive, the PI controller has been widely used in the speed controller because of the simple implementation. To obtain a good speed response in a general drive system using the PI controller, the high bandwidth of a controller is established. therefore, in this paper, a Fuzzy controller is applied to the 7-phase BLDC motor drive system in order to improve the speed control performance. The Fuzzy controller is compared with a conventional PI controller through the experiment with respect to speed dynamic responses. These experimental results show that the Fuzzy controller of the 7-phase BLDC motor drive system is superior over the conventional PI controller. The algorithm using the Fuzzy controller can improve a comfortable ride in the field of high performance 7-phase BLDC motor drive applications.

A Study on a Flux Switching Motor Drive for Fan Application

  • Kim, Nam-Hun
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.7
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    • pp.49-56
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    • 2009
  • A new class of electronically commutated brushless motors, the flux-switching motor (FSM), is gradually emerging for use in power tools and household appliances especially fan and pump application thanks to green policies, This motor offers such advantages as high-power density and relatively high efficiency compare to induction motors, and low cost and simple motor structure compare to the BLDC motor. This paper presents the principle of the FSM and design of the 12/6 pole FSM drive system for fan application. Test results of the prototype motor are provided to verify the validity of the fan application with a TMS320F2812 DSP and inverter.

A Study on the Feed Rate Optimization of a Linear Motored Feed Drive System for Minimum Vibrations (Linear Motor 이송계의 진동 최소화를 위한 이송속도 최적화)

  • 최영휴;홍진현;최응영;김태형;최원선
    • Proceedings of the Korean Society of Machine Tool Engineers Conference
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    • 2004.10a
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    • pp.321-325
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    • 2004
  • Linear motor feed drive systems have been broadly used in machine tools or precision automatic feed systems. Recently, modem machine tools require high speed and high precision feed drive system to achieve high productivity. Unfortunately, a feed drive system, even though it was optimum designed, may experience severe transient vibrations during high-speed operation if its feed rate control is unsuitable. A rough feed rate curve having discontinuity in its acceleration profile causes a serious vibration problem in the feed slides system. This paper presents a feed rate optimization of a machine tool feed slide system, which is driven by a linear motor, for its minimum vibrations. Firstly, a 4-degree-of-freedom lumped parameter model is proposed for the vibration analysis of a linear motor driven machine tool feed drive system. Next, a feed rate optimization of the feed slide is carried out for minimum vibrations. The feed rate curve optimization strategy is to find out the most appropriate acceleration profile with jerk continuity. Of course, the optimized feed rate should approximate to the desired one as possible. A genetic algorithm with variable penalty function was used in this feed rate optimization.

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Sensorless Starting of Direct Drive Horizontal Axis Washing Machines

  • Dianov, Anton;Kim, Nam Su;Lim, Seung Moo
    • Journal of international Conference on Electrical Machines and Systems
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    • v.3 no.2
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    • pp.148-154
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    • 2014
  • This paper describes problems of the sensorless starting of horizontal axis washing machines with direct drive and suggests solution, which was experimentally verified. Horizontal axis washing machines have very difficult conditions for the drive starting, especially at full load. Inertia of the tub and water, torque from the laundry make load torque at starting higher than rated one and sometimes even higher than the maximum torque of the motor, which makes sensorless starting extremely challenging task. This paper suggests modified open-loop starting, where control system is closed shortly after beginning at low speed and rotates the drum until laundry restructuring. To ensure proper work of the sensorless algorithm at low speed additional measures for increasing of the estimation algorithm performance have been taken. These measures include special algorithm for the drive parameters estimation, which has been developed and verified by the experimental results.

DSP based SRM Drive System for EPS Application (DSP 기반의 EPS용 SRM 구동 시스템 개발)

  • Kim, Bong-Chul;Ahn, Young-Ju;Ahn, Jin-Woo
    • Proceedings of the KIEE Conference
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    • 2003.04a
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    • pp.13-15
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    • 2003
  • This paper presents a design and characteristics analysis of a SRM drive for EPS application. A rack mounted EFS system is considered in this paper. A conventional driving room space and mechanical structure are suggested in design stage. In the restricted design conditions, motor parameters are determined for sufficient torque and speed. For the smooth torque generation and simple circuit of power system, 12/8 motor drive is considered. With FEM and magnetic circuit analysis designed motor is simulated to meet the requirement of specifications. Effectiveness of the suggested SRM drive for EPS application is verified by the manufactured prototype motor drive tests.

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Speed Control of Induction Motor Drive for FCU Using TMS320LF2406 DSP controller (TMS320LF2406 DSP를 이용한 FCU용 유도 전동기 속도제어)

  • Choi Woo-Suk;Kim Lee-Hun;Park Kyu-Hyun;Won Chung-Yuen;Lee Sang-Suk;Choi Chang-Young
    • Proceedings of the KIPE Conference
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    • 2001.12a
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    • pp.3-6
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    • 2001
  • This paper designs a drive for high efficiency of the 3-phase IM (induction motor) for FCU(Fan Coil Unit). The speed control system of 3-phase IM for FCU has been implemented by a TMS320LF2406 DSP chip. The DSP TMS320LF2406, which include the most peripheral circuit for control of the Industrial motor suitable for AC motor drive. This type of the controller can be obtained low cost and high reliance. The proposed drive system of the 3-phase IM for the FCU is verified by simulation. The results show the speed control characteristics of the control strategy Proposed for 3-Phase IM drive.

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Sensorless control of Switched Reluctance Motor for Electric AC Compressors of Electrical Vehicles (전기자동차 용 전동식 컴프레서를 위한 스위치드 릴럭턴스 모터의 센서리스 제어)

  • Jeon, Yong-Hee;Kim, Jaehyuck
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.28 no.10
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    • pp.37-42
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    • 2014
  • This paper discusses study of sensorless control of a variable speed switched reluctance motor (SRM) for electric AC compressors on electrical vehicles. A typical SRM drive requires a position sensor such as an encoder or hall sensor to measure the angular rotor position. However, harsh environment in electrical AC compressors for electric vehicles makes it difficult to use the position sensor in their motor drive system. Therefore, a sensorless control scheme for electric compressor motors utilizing magnetic characteristics of SRM with respect to position angle and phase current is proposed. The overall variable speed SRM drive with position sensorless control scheme has been modeled using Matlab/Simulink software and closed loop current control simulation is presented to validate the proposed sensorless drive control.

SRM Drive System for EPS (EPS용 SR 구동시스템)

  • Kim Bong-Chul;Lee Dong-Hee;Ahn Jin-Woo
    • Proceedings of the KIPE Conference
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    • 2004.07b
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    • pp.914-917
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    • 2004
  • This paper presents a design and characteristics analysis of a SRM drive for EPS application. A rack mounted EPS system is considered in this paper. A conventional driving room space and mechanical structure are suggested in design stage. In the restricted design conditions, motor parameters are determined for sufficient torque and speed. For the smooth torque generation and simple circuit of power system, 12/8 motor drive is considered. With FEM and magnetic circuit analysis, designed motor is simulated to meet the requirement of specifications. Effectiveness of the suggested SRM drive for EPS application is verified by the manufactured prototype motor drive tests.

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Design and Drive Characteristics of SRM for EPS Application (EPS용 SRM의 설계 및 운전특성)

  • 안진우;손익진;이동희
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.52 no.12
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    • pp.587-594
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    • 2003
  • This paper presents a design and characteristic analysis of an SRM drive for EPS(Electrically Power Steering) application. A rack mounted EPS system is considered in this paper. A conventional driving room space and mechanical structure are considered in a design stage. In the restricted design conditions, motor parameters are determined for sufficient torque and speed. For the smooth torque generation and simple circuit of power system, 12/8 motor drive is considered. With FEM and magnetic circuit analysis, designed motor is simulated to meet the requirement of specifications. Effectiveness of the suggested SRM drive for EPS application is studied by the drive tests of a prototype motor.

A Drive Method of SRM for EPS with High Efficiency & Low Torque Ripple (EPS용 SRM의 고효율 저토크리플 구동방식)

  • Hwang H.J.;Moon J.W.;Kim J.K.;Ahn J.W.
    • Proceedings of the KIPE Conference
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    • 2003.07b
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    • pp.832-835
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    • 2003
  • This paper presents a design and characteristics analysis of a SRM drive for EPS(Electrically Power Steering) application. A conventional driving room space and mechanical structure are suggested in design stage. In the restricted design conditions, motor parameters are determined for sufficient torque and speed. For the smooth torque generation and simple circuit of power system, 12/8 motor drive is considered. With FEM and magnetic circuit analysis, designed motor is simulated to meet the requirement of specifications. Effectiveness of the suggested SRM drive for EPS application is verified by the manufactured prototype motor drive tests.

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