• Title/Summary/Keyword: Synchronous Control

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Optimization of PI Controller Gain for Simplified Vector Control on PMSM Using Genetic Algorithm

  • Jeong, Seok-Kwon;Wibowo, Wahyu Kunto
    • Journal of Power System Engineering
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    • v.17 no.5
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    • pp.86-93
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    • 2013
  • This paper proposes the used of genetic algorithm for optimizing PI controller and describes the dynamic modeling simulation for the permanent magnet synchronous motor driven by simplified vector control with the aid of MATLAB-Simulink environment. Furthermore, three kinds of error criterion minimization, integral absolute error, integral square error, and integral time absolute error, are used as objective function in the genetic algorithm. The modeling procedures and simulation results are described and presented in this paper. Computer simulation results indicate that the genetic algorithm was able to optimize the PI controller and gives good control performance of the system. Moreover, simplified vector control on permanent magnet synchronous motor does not need to regulate the direct axis component current. This makes simplified vector control of the permanent magnet synchronous motor very useful for some special applications that need simple control structure and low cost performance.

Sensorless Control of a Surface Mounted PM Synchronous Motor in Over Modulation Regions by Detecting Phase Voltages (영구자석 표면부착형 동기전동기의 과변조 영역에서 상전압 검출에 의한 센서리스 제어)

  • Choi, Hae-Jun;Lee, Han-Sol;Cho, Kwan-Yuhl;Kim, Hag-Wone
    • The Transactions of the Korean Institute of Power Electronics
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    • v.22 no.1
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    • pp.53-59
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    • 2017
  • The information on the actual voltages and actual currents of the motor is required for the sensorless control of a permanent magnet synchronous motor without rotor position sensors. In the model-based rotor position estimator of a PM synchronous motor, the reference voltages, which are the outputs of the current controller, are commonly used. The reference voltages in over-modulation regions for high-speed operation differ from the actual voltages applied to the motor. Consequently, the estimated rotor position and rotor speed may fail to track the real rotor position and real rotor speed. In this paper, the sensorless control for a PM synchronous motor in over-modulation regions for high-speed operation is proposed. The three-phase voltages applied to the motor are measured by using additional voltage detection circuits, and the performance of the rotor position estimator based on the measured three-phase voltages is validated through the experimental results.

Robust Synchronous Control of a Two-Axes Driving System using Coupling Structure (커플링구조를 이용한 2축 구동시스템의 강인한 위치동기제어)

    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 2002.05a
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    • pp.248-252
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    • 2002
  • In this study, a synchronous controller which can be applied to two-axes position synchronization has been developed. The synchronous control system based on coupling structure has been composed of speed and synchronous controller. The speed controller has been designed to fellow speed reference. And the synchronous controller has been designed in the view point of accurate synchronization and robust stability by $H_{\infty}$ approach. The effectiveness of the designed synchronous controller has been demonstrated by experiment.

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Speed Control of Permanent Magnet Synchronous Motors using an Adaptive Controller (적응제어기를 이용한 영구자석 동기전동기의 속도 제어)

  • Jung, Jin-Woo;Kim, Tae-Heoung
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.5
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    • pp.977-983
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    • 2011
  • This paper proposes a new adaptive speed controller to achieve a robust speed control of a permanent magnet synchronous motor(PMSM). The proposed adaptive regulator does not require any information on the motor parameter and load torque values, so it is very insensitive to model parameter and load torque variations. Also, the stability of the proposed adaptive control system is proven. To validate the robustness of the proposed adaptive speed controller, both simulation and experimental results are provided under motor parameter and load torque variations. It is clearly demonstrated that the proposed adaptive regulator can accurately control the speed of permanent magnet synchronous motors.

Fuzzy Speed Regulator based on a Fuzzy Acceleration Observer for Vector Control of Permanent Magnet Synchronous Motors (영구자석 동기전동기의 벡터 제어를 위한 퍼지 각가속도 관측기 기반의 퍼지 속도제어기)

  • Jung, Jin-Woo
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.2
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    • pp.330-337
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    • 2011
  • This paper presents a new fuzzy speed controller based on a fuzzy angular acceleration observer to realize a robust speed control of permanent magnet synchronous motors(PMSM). The proposed speed controller needs the information of the angular acceleration, thus the first-order fuzzy acceleration observer is designed. The LMI existence condition is given for the proposed fuzzy speed controller, and the gain matrices of the controller are calculated. It is verified that the augmented control system consisting of the fuzzy speed controller and the fuzzy acceleration observer is mathematically stable. To validate the effectiveness of the proposed acceleration observer-based fuzzy speed controller, the simulation and experimental results are shown under motor parameter variations. It is definitely proven that the proposed control scheme can precisely track the speed of a permanent magnet synchronous motor.

Synchronous Motion Control of Multi-Climbing Hydraulic Robots for High-Rise Building Construction Automation (고층건물 시공자동화를 위한 다중 클라이밍 유압로봇의 운동 동기제어)

  • Hong, Yun-Suk;Chang, Hyo-Whan
    • Journal of the Korean Society for Precision Engineering
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    • v.26 no.9
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    • pp.103-111
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    • 2009
  • Multi-climbing hydraulic robots are used to lift construction factory (CF) synchronously for applications in the automation of a high-rise building construction. In this study, synchronous motion controller is proposed for the hydraulic robots, whose strategy is not only to make each robot follow the reference path basically by sliding-mode control, but also to synchronize motions of two adjacent cent robots consecutively by cross-coupled control technique. Simulations are performed by using SIMULINK for a system similar to a practical application that includes unbalance in CF and wind disturbance. The results show that the proposed controller significantly reduces synchronous errors, compared to the individual controller for each hydraulic robot.

The Synchronous Control System Design of a Dual Electric Propulsion System for Small Boats (소형 선박용 듀얼 전기추진시스템의 동기제어시스템 설계)

  • Byun, Jung-Hwan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.12 no.1
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    • pp.85-92
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    • 2017
  • Recently, electric propulsion systems are used for unmanned surface vehicle, fish finder boat, etc. Some of these propulsion systems can be constructed of two electric motors and propellers for advanced impellent force. In this case, the speed difference generated between two propellers, namely, the synchronous error has a bad influence on the energy efficiency and course error. In this study, a synchronous control system is designed to restrain synchronous error caused by disturbance and mismatched dynamic characteristics. The control system is composed of the reference model, pre-filters, speed controllers, and synchronous controllers. The reference model is used for calculating the decoupled synchronous error and control input for each propulsion system. The pre-filters and speed controllers are designed in order that the propulsion system may follow the reference signal without overshoot and input saturation. And the synchronous controllers are designed from the viewpoint of stable and quick synchronization through root locus mothed approach. Finally, the simulation results show that the designed control system is effective for the disturbance.

Sensorless Control of the Synchronous Reluctance Machine

  • Kilthau, A.;Pacas, J.M.
    • Journal of Power Electronics
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    • v.2 no.2
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    • pp.95-103
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    • 2002
  • The paper deals with the control of the synchronous reluctance machine without position senser. A method for the computation of the transformation angle out of terminal voltages and currents is presented. The injection of test signals allows operation at zero speed. Fundamental for this control scheme is the angle estimation method over the whole operating range including field-weakening is discussed in detail. The implementation of the angle estimation method in a rotor-oriented control scheme and practical results are demonstrated.

A Study on The Synchronous Control of Dual Electric Propulsion System Based on the Coupling Structure (커플링구조에 기초한 전기추진시스템의 동기제어에 관한 연구)

  • Yang, Kyong-Uk;Byun, Jung-Hwan
    • The Journal of the Korea institute of electronic communication sciences
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    • v.13 no.2
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    • pp.349-356
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    • 2018
  • In this study, the synchronous control system is designed to restrain the speed difference generated between two propellers, namely, synchronous error in a dual electric propulsion system of unmanned surface vehicle, fish finder boat, etc. The control system based on coupling structure is composed of pre-filters and speed controllers for each propulsion system and a synchronous controller cross-coupled between two propulsion systems. The pre-filter and speed controller are designed in order that the propulsion system may follow the speed reference without overshoot and input saturation. And the synchronous controller is designed in consideration of damping and quickness of the synchronous controller system after analyzing effect of the skew disturbance and mismatched dynamic characteristics on synchronous error. Finally, the simulation results show that the designed control system is effective for elimination of synchronous error.

Parallel Control of Synchronous Buck Converter Using DSP (DSP를 이용한 Synchronous Buck Converter의 병렬 제어)

  • Kim Jeong-Hoon;Lim Jeong-Gyu;Shin Hwi-Beom;Chung Se-Kyo;Lee Hyun-Woo
    • Proceedings of the KIPE Conference
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    • 2006.06a
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    • pp.140-142
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    • 2006
  • This paper represents a digital parallel control of a synchronous buck converter using a digital signal processor (DSP). The digital PWM and load sharing controller is implemented in the DSP TMS320F2812 and the experimental results are provided to show the feasibility of the digital synchronous buck regulator.

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