• Title, Summary, Keyword: AC-SERVO motor

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Digital Control System Of PMSM Type AC Servo Motor Using Micro-Processor (마이크로 프로세서에 의한 영구자석 동기 전동기형 AC 서보 전동기 디지탈 제어계 설계)

  • Yoon, Byung-Do;Kim, Eel-Hwan;Lee, Nae-Yong
    • Proceedings of the KIEE Conference
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    • pp.321-324
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    • 1988
  • This paper presents the result of driving performance analysis of PMSM type AC servo motor based on control system using a microprocessor. The experiment using the microprocessor is tested with a 120[v], 200[w] PMSM type AC servo motor. The PWM signal generated in the microprocessor for the servo motor voltage is chapped by power transistor modules to change the AC servo motor speed. The torque of the AC servo motor with a permanent magnet can be easily controlled over a wide range by changing the AC servo motor current.

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A study on the torque characteristic of AC servo system by phase advance control (진상각 제어에 따른 AC 서보 모터의 토오크 특성에 관한 연구)

  • 임윤택;손명훈;허욱열
    • 제어로봇시스템학회:학술대회논문집
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    • pp.393-400
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    • 1992
  • The DC(Direct-Current) servo motor has widely used for many application areas, FA(Factory Automation), OA(Office Automation) and home applications. But DC servo motor needs periodical inspection because it has brush and commutator. Recently, AC servo motor has expanded it's application areas due to for the development of the power semi-conductor and control technology. But it has large torque ripple for it's small number of commutation. And it also has cogging torque due to permanent magenet rotor. Therefore it can't run balence rotarion. Many torque ripple reduction methods are published. In this paper, phase advanced method adopted for torque ripple reduction of AC servo motor. In this research, AC servo motor torque characteristic variation surveied under the phase advance control through the computer simulation. Under the simulation, the load inertia varied from 0.0001[Kg.m$^{2}$] to 0.0314[Kg.m$^{2}$]. The result os nonlinear simulation, torque and speed ripple of AC servo motor under the phase advance control reduced approximately 50[%] and 10[%]. And maximum torque of AC servo motor under phase advance control condition increased about 5[%] as compare with fixed switching time.

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Design of a Fuzzy-Tuning High Gain Observer for Speed-Sensorless Control of an AC Servo Motor (교류 서보 전동기 속도센서리스 제어를 위한 퍼지 동조 고이득 관측기 설계)

  • Kim, Sang-Hoon;Kim, Lark-Kyo
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.54 no.12
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    • pp.705-712
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    • 2005
  • This paper deals with speed-sensorless control of an AC servo motor using Fuzzy-Tuning High Gain Observer(FTHGO). Resolver or encoder can be used to measure a rotor speed, but it has a limit to detect motor speed precisely. To solve this problem, it is studied to measure a speed of an AC servo motor without sensor. In this paper, the gain of an observer to estimate motor speed is properly set up and designed using the fuzzy control theory. It calculates the differentiation of the rotor current of the AC motor and estimates the rotor speed using it. Proposed speed sensorless control is performed using the estimated speed as the control variable. Designed FTHGO is applied to AC servo motor to verify the feasibility of the proposed observer. Feasibility of the FTHGO proposed in this paper is proven comparing the experimental results with/without the speed sensor.

DEVELOPMENT OF AC SERVO MOTOR CONTROLLER FOR INDUSTRIAL ROBOT AND CNC MACHINE SYSTEM (산업용 ROBOT와 공작기계를 위한 AC SERVO MOTOR 제어기 개발)

  • Lim, Sang-Gwon;Lee, Jin-Won;Moon, Yong-Ky;Jeon, Dong-Lyeol;Jin, Sang-Hyun;Oh, In-Hwan;Kim, Dong-Il;Kim, Sung-Kwun
    • Proceedings of the KIEE Conference
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    • pp.1211-1214
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    • 1992
  • AC servo motor drives, Fara DS series, proposed in this paper can be effectively used in robots, CNC machine tools, and FA system with AC servo motors as actuators. The inverter of the AC servo drive consists of IGBT (Insulated Gate Bipolar Transistor) which have high switching frequency. Noises and vibrations generated in variable speed control of AC servo motors can be greatly reduced due to their high switching frequencies. In the developed servo drive, maximum torque is always generated in the whole speed range by compensating phase shift, which results from the nonlinearies of the AC servo motor during abrupt acceleration and deceleration. Abundant protection functions are provided to prevent abnormal state of the servo motor, and furthermore diverse user options are considered provided for the effective application. The proposed AC servo motor drive is designed to minimize velocity variation with respect to external load, supply voltage, environmental temperature, and humidity, so can be widely used in the fields of factory automation including robots and CNC msachine tools.

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A Study on Improvement of Structural Sliding Method Using AC Induction Motor Servo Control Device (AC유도전동기 서보제어장치를 이용한 구조물 슬라이딩공법)

  • Cho, Young-nam;Han, Jae-woong;Jang, Won-tae
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.235-237
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    • 2018
  • In spite of the superiority of the sliding method in the building construction field, the AC induction motor servo control device is used as the power control technology in the building construction field in order to improve the problems of the hydraulic power control method, thereby contributing to the precision control and the productivity improvement. Based on Induction Motor Servo Controller, we proposed the development of a mobile sliding method using a complex combination of PC and MITY (MS) Servo.

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Speed control of AC Servo motor using neural network (뉴럴네트웤을 이용한 AC 서보 전동기의 속도제어)

  • Ban, Gi-Jong;Yun, Gwang-Ho;Choe, Seong-Dae;Nam, Moon-Hyon;Kim, Lark-Kyo
    • Proceedings of the KIEE Conference
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    • pp.2747-2749
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    • 2005
  • This paper presents an intelligent control system for an ac servo motor dirve to track periodic commands using a neural network. AC servo motor drive system is rather similar to a linear system. However, the uncertainties, such as machanical parametric variation, external disturbance, uncertainty due to nonideal in transient state. therefore an intelligent control system that isan on-line trained neural network controller with adaptive learning rates.

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Study for Performance Evaluations of the AC Servo Motor Made in Korea (국산 AC 서보모터의 성능평가를 위한 연구)

  • Kong, Jae-Hyang;Park, Kwang-Ho;Yoon, Joon-Yong;Kwon, Woo-Chul
    • Transactions of the Korean Society of Machine Tool Engineers
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    • v.16 no.1
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    • pp.19-25
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    • 2007
  • Items and methods of synchronous type AC servo motor's performance evaluation were researched. Through the research, nine items of performance evaluations were selected from study of IEC standards and domestic technical reports. Using the proposed evaluation items and methods, performance evaluations were carried out into two domestic products and one foreign product for analysis of what results means. The results show that the proposed items of performance evaluations are reasonable and proper for performance evaluations of AC servo motors.

A Ringing Surge Clamper Type Active Auxiliary Edge-Resonant DC Link Snubber-Assisted Three-Phase Soft-Switching Inverter using IGBT-IPM for AC Servo Driver

  • Yoshitsugu, Junji;Yoshida, Masanobu;Hiraki, Eiji;Inoue, Kenji;Ahmed, Tarek;Nakaoka, Mutsuo
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.2B no.3
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    • pp.115-124
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    • 2002
  • This paper presents an active auxiliary edge-resonant DC link snubber with a ringing surge damper and a three-phase voltage source type zero voltage soft-switching inverter with the resonat snubber treated here for the AC servo motor driver applications. The operation of the active auxiliary edge-resonant DC link snubber circuit with PWM voltage is described, together with the practical design method to select its circuit parameters. The three-phase voltage source type soft-switching inverter with a single edge-resonant DC link snubber treated here is evaluated and discussed for the small-scale permanent magnet (PM) type-AC servo motor driver from an experimental point of view. In addition to these, the AC motor stator current and its motor speed response for the proposed three-phase soft-switching inverter employing Intelligent Power Module(IPM) based on IGBTS are compared with those of the conventional three-phase hard-switching inverter using IPM. The practical effectiveness of the three-phase soft-switching inverter-fed permanent magnet type AC motor speed tracking servo driver is proven on the basis of the common mode current in a novel type three-phase soft-switching inverter-fed AC motor side and the conductive noise on the mains terminal interface voltage as compared with those of the conventional three-phase hard-switching inverter-fed permanent magnet type AC servo motor driver for the speed tracking applications.

Vector control of AC servo motor using high Performance DSP (고성능 DSP를 이용한 AC 서보 모터의 벡터제어)

  • Choi, Chi-Young;Hong, Sun-Gi
    • Proceedings of the KIEE Conference
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    • pp.258-261
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    • 2003
  • This paper is a studying of the vector control of AC servo motor using a high performance DSP(TMX320F2812). This DSP has many special peripheral circuits to drive a AC Servo motor as AD converter, QEP and so on. It makes us reduce the time of developing a control system and also can be simple size controller. We use vector control algorithm for instantaneous torque control and SVPWM algorithm by offset voltage methods.

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Speed Control of AC Servo Motor Using Adaptive Fuzzy-Sliding Observer (적응 퍼지-슬라이딩 관측기를 이용한 교류 서보 전동기 속도제어)

  • Kim, Sang-Hoon;Yoon, Kwang-Ho;Ko, Bong-Woon;Kim, Won-Tae;Kim, Gi-Nam;Nam, Moon-Hyon;Kim, Lark-Kyo
    • Proceedings of the KIEE Conference
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    • pp.726-728
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    • 2004
  • In this paper, the gain of the observer is properly set up using the fuzzy control and Fuzzy-Sliding observer(FSQ) that have a superior transient characteristic and is easy to implement compared to the existing method is designed. It estimate the differentiation of the armature current directly using the armature current measured in the AC motor. It estimate the speed of the rotor using the differentiation. It is proposed speed sensorless control method using the estimated speed. Optimal gain of speed observer(Luenberger observer) was set up using the fuzzy control and adapted speed control of AC servo motor. To verify the performance of designed Fuzzy-Sliding observer, simulation compared with fixed speed observer gain of G.B Wang and S.S Peng's sliding observer is performed. Also, it was proved the excellence and feasibility of the proposed observer from the comparison test with a speed sensor and without a speed sensor which used a highly efficient drive and 400W AC servo motor starting system.

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