• Title/Summary/Keyword: 회전속도 제어

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A Study on the Effect of the Motor Drive in Simulation Analysis by Induction Motor Parameters Using a Matlab & PSPICE (Matlab과 PSPICE를 이용한 유도전동기 파라미터에 의해 전동기 운전에 미치는 영향 분석에 관한 연구)

  • Na, Seung-Kwon;Ku, Gi-Jun
    • Journal of Advanced Navigation Technology
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    • v.16 no.6
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    • pp.1005-1013
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    • 2012
  • In this paper, the induction motor in indirect vector control method modeling, from indirect vector control method it undergoes an influence to the $1/{\tau}$. When changing a rotor resistance because being like this quality Matlab/Simulink where it will make what kind of effect in speed presumption it led proposed control system used microprosser TMS320C31 DSP for high speed processing. The effectiveness of the proposed system is verified by simulation and experimental results. This result shows highly characteristic speed estimation and robust character of load regulation. and the flux which it follows in change of parameter and speed presumption it was under simulation and get the good result which it comes to get it analyzed.

The Control Method of In-Wheel PMSM for Electric Scooter using Speed Observer (속도 관측기를 이용한 전기스쿠터용 IN-WHEEL 영구자석 동기 전동기의 제어 방법)

  • Son, Tae-Sik;Lee, Yong-Kyun;Kim, Hag-Wone;Cho, Kwan-Yuhl;Mok, Hyung-Soo
    • The Transactions of the Korean Institute of Power Electronics
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    • v.16 no.2
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    • pp.130-136
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    • 2011
  • This paper presents the torque control algorithm of a permanent magnet synchronous motor(PMSM) for an electric scooter. The volume of the in-wheel type motor is restricted due to the complicated mechanical structure in wheel of an electric scooter, so the hall sensors instead of resolver and encoder for the rotor position sensors are installed. In this paper, the rotor speed and position are estimated from the speed estimator for vector control of a PMSM with hall sensors. The motor starts to rotate at standstill in BLDC mode with 120 degree conduction. After start up, the operating mode is changed to the vector control with maximum torque per ampere(MTPA) operation at low speeds and flux weakening control at high speeds. The performance of the proposed control algorithm is verified through the experiment in the electric scooter.

Comparative Study of Performance of Switching Control and Synchronous Notch Filter Control for Active Magnetic Bearings (능동 자기 베어링을 위한 동기 노치필터 제어기와 스위칭 제어기의 성능 비교 연구)

  • Yoo, Seong Yeol;Noh, Myounggyu
    • Transactions of the Korean Society of Mechanical Engineers A
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    • v.37 no.4
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    • pp.511-519
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    • 2013
  • Switching controllers for active magnetic bearings are claimed to minimize the copper losses because they do not use bias currents. In this study, we compare the performances of the switching controller with those of the widely used proportional-derivative (PD) controller. The PD controller is combined with a synchronous notch filter to reduce the effect of the unbalance disturbance. For a fair and objective comparison, the PD controller is designed systematically. The switching controller is designed so that the dynamics of the two controllers are almost identical. A system model is developed. This model includes the flexible modes of the rotor and the dynamics of the sensors and amplifiers. The simulation results show that the switching controller indeed reduces the copper loss at lower speeds. However, it fails to operate around the speed close to the bending mode of the rotor.

A Study on the Identification and Speed Control of Diesel Engines Using Neural Networks (신경회로망을 이용한 디젤기관의 동정과 속도제어에 관한 연구)

  • K-Y kim;Y-H Yu
    • Journal of Advanced Marine Engineering and Technology
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    • v.26 no.6
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    • pp.705-711
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    • 2002
  • 디젤기관은 실린더 내경의 크기, 실린더 수 및 회전수에 따라 착화지연, 연소지연 및 디젤기관의 각종 정수가 달라지므로 비선형이 심한 시스템이다. 본 연구에서는 신경회로망을 이용하여 발전기를 구동하는 디젤 기관의 속도를 제어하는 디젤기관 신경회로망 디지털조속기를 제안한다. 이를 위하여 3상 50㎾ 발전기를 구동하는 4행정 4실린더, 1800 rpm ISUTSU 디젤기관의 실제 운전데이터로부터 뉴럴에뮬레이터를 구한다. 최적치 뉴럴에뮬레이터 구성을 위하여 다양한 역전파알고리즘으로 학습을 행하고 결과를 비교한다. 또한 디젤기관의 역으로부터 뉴럴 제어기를 구성하고 뉴럴에뮬레이터로 시뮬레이션을 행한다. 외란이 존재하는 경우에도 효과적인 뉴럴제어기를 구성하기 위하여 선택적 뉴럴제어 기의 사용을 제안한다. 또한 응답성을 향상하고 정확한 목표치추종을 위하여 PI제어기를 보조제어기로 사용하는 하이브리드제어기를 구성하여 시뮬레이션을 통하여 성능이 향상됨을 보인다.

PMSM Sensorless Vector Control for Flywheel Energy Storage System (플라이휠 에너지저장시스템용 영구자석 동기전동기 센서리스 벡터 제어)

  • Jo, Hyeungil;Baek, SeoungGil;An, Hyunsung;Cha, Hanju
    • Proceedings of the KIPE Conference
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    • 2015.07a
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    • pp.491-492
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    • 2015
  • 본 논문에서는 영구자석 동기 전동기(PMSM)의 수학적 모델을 기반으로 한 플라이휠 에너지 저장 시스템을 매트랩/시뮬링크를 사용하여 모델링 하였다. PMSM의 센서리스 벡터 제어를 위해 속도 및 전류 제어기를 구현하였으며, PI형 상태 관측기를 이용한 역기전압 추정기와 PLL 기반의 위치/속도 추정기를 구현하였다. 초기 기동시 역기전압 추정기반 센서리스 제어 방식은 회전자의 위치를 정확히 추종 할 수 없어 Open-Loop 알고리즘을 통하여 동기 전동기를 구동시킨다. 플라이휠 에너지 저장 시스템의 센서리스 제어 알고리즘은 충전 모드와 발전 모드에서의 시뮬레이션을 통해 성능을 확인하였다.

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Operation of Brushless DC Motor without a Rotor Magnet Position Sensor (회전자극 위치센서 없는 Brushless DC전동기의 운전에 관한 연구)

  • 서석훈;엄우용
    • Journal of the Korean Institute of Telematics and Electronics T
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    • v.36T no.3
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    • pp.50-55
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    • 1999
  • Brushless DC Motor(BLDCM) has high efficiency. But this type of motor needs a rotor sensor which complicates the motor configuration. Rotor position sensor degrades system reliability in the severe environmental condition. In this paper, we study a controller which permits the determination of the rotor position by the back EMF to eliminate the rotor position sensor Also, since the back EMF is zero at standstill, a starting technique which permits the starting of an asynchronous motor without a sensor is described. The controller is implemented using microcontroller for minimal external component.

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Development of a frequency-to-voltage transducer in a motor (모터의 회전수-전압 변환장치 개발)

  • 김강철
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.5 no.3
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    • pp.563-572
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    • 2001
  • A conventional motor in a crane has a taco generator to feed back the number of turns to a main controller. The taco generator is contacted to a motor shaft through the coupling. Errors in a crane have often occurred because the coupling has worn out while the motor is turning. In this paper, we design the device of the frequency to voltage transducer in a motor. The device is composed of a rotary encoder, a speed measurement using PIC16F84 controller, a display, and a direction-decision block. The rotation of a motor is recognized by the rotary encoder and microcontroller counts the number of turns of a motor. The emergency signal is generated if the frequency goes over or below the speed limit of a motor. And the device can acknowledge the rotation direction of the motor after 6。 rotation. The simulation results and the test for a implemented device have shown that the transducer of a frequency to a voltage can replace a taco generator in a crane.

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Numerical Study on Flow Characteristics and Classification Performance of Circulating Air Classifier (수치해석을 이용한 순환형공기분급기 유동특성 및 분급성능 연구)

  • Yoon, Jong-Hwan;Cheong, Jun-Gyo
    • Transactions of the Korean Society of Mechanical Engineers B
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    • v.41 no.3
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    • pp.211-219
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    • 2017
  • In this study, we performed numerical simulations on a circulating air classifier using a commercial computational fluid dynamics program. The variations in the grade efficiency, the cut-size and the cut-sharpness were calculated and discussed. By controlling the rotating speed of the main fan, the cut-size could be rapidly increased. However the linearity of the cut-size variation with respect to the main fan speed was not sufficient for application to contaminated soil classification processes. On the other hand, by varying the rotating speed of the classifying fan, the cut-size gradually decreased and could be precisely adjusted. Using both the main fan and the classifying fan, we could achieve larger cut-sharpness values and better classifying performances.

Simple Kinematic Model Generation by Learning Control Inputs and Velocity Outputs of a Ship (선박의 제어 입력과 속도 출력 학습에 의한 단순 운동학 모델 생성)

  • Kim, Dong Jin;Yun, Kunhang
    • Journal of Navigation and Port Research
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    • v.45 no.6
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    • pp.284-297
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    • 2021
  • A simple kinematic model for the prediction of ship manoeuvres based on trial data is proposed in this study. The model consists of first order differential equations in surge, sway, and yaw directions which simulate the time series of each velocity component. Actually instead of sea trial data, dynamic model simulations are conducted with randomly varied control inputs such as propeller revolution rates and rudder angles. Based on learning of control inputs and velocity outputs of dynamic model simulations in sufficient time, kinematic model coefficients are optimized so that the kinematic model can be approximately reproduce the velocity outputs of dynamic model simulations with arbitrary control inputs. The resultant kinematic model is verified with new dynamic simulation sets.

A Speed Sensorless for IPMSM based on an Adaptive Integral Binary Observer in the Field-Weakening Region (약계자 영역에서의 적응적분바이너리 관측기를 이용한 매입형 영구자석 동기전동기의 센서리스 속도제어)

  • Lee Hyoung;Kang Hyoung-Seok;Kim Young-Seok
    • Proceedings of the KIPE Conference
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    • 2006.06a
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    • pp.13-15
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    • 2006
  • 센서리스 제어를 위한 상태 관측기의 설계시 기존의 바이너리 관측기의 성능을 향상시키기 위해 스위칭 평면에 적분항을 추가함으로서 정상상태의 성능을 향상시킬 수 있다. 또한 전동기의 관성계수나 마찰계수와 같은 운동방정식의 파라미터들은 계측하기 어려우며 관측기의 성능저하를 야기하므로 실제구현에서도 많은 제약이 따른다. 이러한 문제를 해결하기 위해 적응 적분바이리 관측기를 제안하다. 그리고 정격속도 이상으로 구동하기 위해서 약계자 영역에서의 센서리스 제안한다. IPMSM이 w가 보다 높은 속도에서 운전되기 위해서는 정격전압이상의 입력이 요구되어진다. 그러나 정격전압에서 d축 전류가 회전자 자속을 감소시키는 방향으로 주입된다면 더 높은 속도에서 운전되어질 수 있다.

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