• Title/Summary/Keyword: Current Vector Control

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Design of neuro-fuzzy for robust control of induction motor (유도전동기의 강인 제어를 위한 뉴로-퍼지 설계)

  • 송윤재;강두영;김형권;안태천
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2004.04a
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    • pp.454-457
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    • 2004
  • In this paper, control method proposed for effective speed control of the induction motor indirect vector control. For the induction motor drive, indirect vector control scheme that controls torque current and flux current of the stator current independently so that it can have improved dynamics. Also, neuro-fuzzy algorithm employed for torque current control in order to optimal speed control The proposed neuro-fuzzy algorithm can be applied to the precise speed control of an induction motor drive system or the field of any other power systems.

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An Implementation of Vector Control of AC Servo Motor based on Optical-EtherCAT Network (광-ETherCAT 네트워크 기반 PMSM의 벡터제어 구현)

  • Kim, Yong-Jin;Kim, Kwang-Heon;Bae, Young-Chul
    • The Journal of the Korea institute of electronic communication sciences
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    • v.8 no.4
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    • pp.583-588
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    • 2013
  • In this paper we propose implement technique of vector current control in order to verify performance of an AC servo driver that is able to easy control of motion with multi-axis in the robot. In doing do, we have developed the AC servo driver to driving PMSM, and then we confirm that this driver whether operating or not normally by controlling of vector current. The vector current control was performed at the no load condition in PMSM. Then we compare command control and tracking control. As a result of verification, we recognize we get a satisfactory result.

Rotor Time Constant Compensation of Vector Controlled Induction Motor Using Stator Current and Flux Error (고정자 전류와 자속의 오차를 이용한 벡터제어 유도전동기의 회전자 시정수 보상)

  • 김우현;박철우;임성운;권우현
    • Journal of Institute of Control, Robotics and Systems
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    • v.6 no.5
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    • pp.367-375
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    • 2000
  • It is proposed that the rotor time constant and inductance are compensated at the same time in the indirect vector control method of an induction motor. The proposed scheme compensates the rotor time constant using the difference between the Q-axis real stator current and estimated current that is calculated from the terminal voltage and current, and compensates inductance by using the difference between the D-axis real stator flux and estimated stator flux in the synchronous rotating reference frame. Although the rotor time constant and inductance vary at once, the proposed method compensates the rotor time constant and inductance with accuracy. In addition to, two variables can be compensated not only at the steady state condition, but also at the transient state, where the torque varies in a rectangular pulse waveform. Therefore, the performance of vector control is greatly improved as verified by experiment.

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Generalized Vector Control with Reactive Power Control for Brushless Doubly-Fed Induction Machines

  • Duan, Qiwei;Liu, Shi;Schlaberg, H. Inaki;Long, Teng
    • Journal of Power Electronics
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    • v.18 no.3
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    • pp.817-825
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    • 2018
  • In this paper, a current hysteresis control with good decoupling properties for doubly-fed brushless induction machines (BDFIMs) has been proposed based on a generalized vector model. The independent control of the reactive power and speed for BDFIMs has been achieved by controlling the d-axis and the q-axis current of the control windings (CW). The proposed vector control method has been developed for the power winding (PW) flux frame. Experimental verification of a type Y180M-4 BDFIM prototype with 1/4 pole-pairs has been presented. Evidence of its good performance has been shown through experimental results.

Vector Controlled Induction Motor Drives Fed by PWM CSI Using Space Current Vectors (공간 전류벡터를 이용한 PWM CSI 구동 유도전동기의 벡터제어)

  • Lee, Dong-Choon;Ko, Sung-Beom;Ro, Chae-Gyun
    • Proceedings of the KIEE Conference
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    • 1995.07a
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    • pp.357-359
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    • 1995
  • In this paper, vector control of induction motor drives using space current vector PWM is presented. The scheme gives advantages, besides robustness to inverter arm-shoot, sinusoidal input current and voltage for induction motors. In addition, space vector PWM for CSI produces faster transient response than conventional pattern PWM. Also, a modulation index control is proposed.

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Vector Control for the Rotor Resistance Compensation of Induction Motor (유도전동기 회전자 저항 보상을 위한 벡터제어)

  • Park, Hyun-Chul;Lee, Su-Woon;Kim, Yeong-Min;Hwang, Jong-Sun
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 2001.11b
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    • pp.65-68
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    • 2001
  • In the vector control methods of induction motor, the stator current is divided into the flux and torque component current. By controlling these components respectively, the methods control independently flux and torque as in the DC motor and improve the control effects. To apply the vector control methods, the position of the rotor current is identified. The indirect vector control use the parameters of the machine to identify the position of rotor flux. But due to the temperature rise during machine operation, the variation of rotor resistance degrades the vector control. To solve the problem, the q-axis is aligned to reference frame without phase difference by comparing the real flux component with the reference flux component. Then to compensate the slip, PI controller is used. The proposed method keeps a constant slip by compensating the gain of direct slip frequency when the rotor resistance of induction motor varies. To prove the validations of the proposed algorithm in the paper, computer simulations is executed.

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Sensorless Induction Motor Vector Control Using Stator Current-based MRAC (고정자 전류 기반의 모델 기준 적응 제어를 애용한 유도전동기의 센서리스 벡터제어)

  • 박철우;최병태;권우현
    • Journal of Institute of Control, Robotics and Systems
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    • v.9 no.9
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    • pp.692-699
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    • 2003
  • A novel rotor speed estimation method using Model Reference Adaptive Control(MRAC) is proposed to improve the performance of a sensorless vector controller. In the proposed mettled, the stator current is used as the model variable for estimating the speed. In conventional MRAC methods, the relation between the two model errors and the speed estmation error is unclear. Yet, in the proposed method, the stator current error is represented as a function of the first degree for the error value in the speed estimation. Therefore, the proposed method can produce a fast speed estimation and is robust to the parameters error In addition, the proposed method of offers a considerable improvement in the performance of a sensorless vector controller at a low speed. The superiority of the proposed method is verified by simulation and experiment in a low speed region and at a zero-speed.

Vector Control of an Induction Motor with Forced Commutated Cycloconverter (강제전류 싸이크로콘버터에 의한 유도전동기 벡터제어)

  • Gi Taek Kim
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.32B no.9
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    • pp.1239-1246
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    • 1995
  • A forced commutated cycloconverter (FCC) is a direct ac-ac converter capable of providing simultaneous voltage and frequency transformations. In this paper, vector control of an induction motor controlling stator current with forced commutated cycloconverter is presented. The advantage of current control is that the stator dynamics are eliminated and high performance vector control can be achieved. A novel modulation method based on dq transformation techniques is presented. Proposed modulation strategy generates the low frequency modulation function by the instantaneous value of the desired output voltages not by the steady state values of output magnitude and output frequency. PI control and predictive control algorithm for current control are applied, and the validity of proposed method is confirmed through digital simulations. Simulation results of step response and torque distubance and current control are presented.

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Analysis of the Transient Phenomena of a Squirrel-Cage Induction Motor by means of the Spiral Vector method and the Phase Segregation method (감쇠회전 벡터법과 상 분리법에 의한 농형 유도 전동기의 과도현상해석)

  • Jeong, Jong-Ho;Lee, Eun-Woong;Choi, Jae-Young
    • Proceedings of the KIEE Conference
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    • 2000.07b
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    • pp.644-646
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    • 2000
  • An induction motor can be controlled like a separately excited do motor by field oriented control(or vector control). In vector control, Because the transformation of the stator's 3-phase current into two orthogonal current is required. the control scheme is complicated. But, Yamamura proposed a field acceleration method(FAM) without the phase transformation. FAM simplify an implementation control scheme for induction motors. In this paper, the analysis of transient phenomena of a squirrel-cage induction motor was achieved by the spiral vector method and the phase segregation method. It simplified control schemes more than those of vector control.

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Development of Vector Controlled Traction System (벡터제어를 이용한 전동차 구동 시스템)

  • 배본호;설승기;김상훈;이일호;한성수
    • Proceedings of the KSR Conference
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    • 1999.11a
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    • pp.288-295
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    • 1999
  • This paper presents an application of vector control strategy for 1.2MVA IGBT traction drive for electric railway vehicle. The vector control requires the control of the phase and amplitude of output voltage vector[5]. But in case of traction system far railway vehicle, the one-pulse mode is used in order to utilize the link voltage fully[8]. So it is impossible to control the flux axis current and the torque axis current instantaneously and independently. So this paper proposes the vector control strategy with slip-frequency control at one-pulse mode. And precise switching technique between the two different control structures has been proposed. And the strategy was verified by experimental result with 1.2MVA IGBT inverter with four 210㎾ induction motors.

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