• Title/Summary/Keyword: PMSM Vector Control

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A Robust Dynamic Decoupling Control Scheme for PMSM Current Loops Based on Improved Sliding Mode Observer

  • Shen, Hanlin;Luo, Xin;Liang, Guilin;Shen, Anwen
    • Journal of Power Electronics
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    • v.18 no.6
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    • pp.1708-1719
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    • 2018
  • A complete current loop decoupling control strategy based on a sliding mode observer (SMO) is proposed to eliminate the influence of current dynamic coupling and back electromotive force (EMF) in the vector control of permanent magnet synchronous motors. With this strategy, current dynamic decoupling and back EMF compensation can be simultaneously achieved. Unlike conventional methods, the proposed strategy can avoid the disturbances caused by the parametric variations of motor systems and maintain the advantages of proportional integral (PI) controllers, which are robust and easy to operate. An improved SMO, which uses a special PI regulator other than a linear saturation function as the equivalent control law in the boundary layer of a sliding surface, is proposed to eliminate the estimated errors caused by the quasi-sliding mode and obtain a satisfactory decoupling performance. The stability and parameter robustness of the proposed strategy are also analyzed. Physical experimental results are presented to verify the validity of the method.

A Control for 2-axis Gimbaled Millimeter Wave Seeker using Space Vector PWM of PMSM (영구 자석형 동기전동기의 공간전압벡터 PWM 기법을 적용한 밀리미터 웨이브 탐색기 2축 김발 구동 제어)

  • Lee, Sung-Yong;Lee, Jung-Suk
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.12
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    • pp.2386-2391
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    • 2011
  • Tracking and detecting targets by the millimeter wave seeker is affected by moving of platform. In order to perform the tracking performance, stabilization of a millimeter wave seeker which consists of 2-axis gimbals was considered in this study. The feasibility of the analysis and the 2-axis gimbal servo system modeling design were verified along with some simulation results.

Sensorless Control of PM Synchronous Motor Using Adaptive Observer (적응 관측기를 이용한 영구자석 동기전동기의 센서리스 제어)

  • 홍찬호;윤명중
    • Proceedings of the KIPE Conference
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    • 1997.07a
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    • pp.60-63
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    • 1997
  • A new approach to the position sensor elimination of PM synchronous motor drives is presented in this study. Using the position sensing characteristics of PMSM itself, the actual rotor position as well as the machine speed can be estimated by adaptive flux observer and used as the feedback signal for the vector controlled PMSM drive. The adaptive speed estimation is achieved by model reference adaptive technique. The adaptive laws are derived by the Popov's hyperstability theory and the positivity concept. In order to verify the effectiveness of the proposed scheme, computer simulations are carried out for the actual parameters of a PM synchronous motor and the results well demonstrate that the proposed scheme provides a good estimation value of the rotor speed without mechanical sensor. It is also shown that the actual rotor position as well as the machine speed can be achieved under the variation of the magnet flux linkage. Since the flux linkages are estimated by the adaptive flux observer and used for the identification of the rotor speed, robust estimation of the rotor speed can be performed.

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Analysis of Phase Current Ripple and Torque Ripple of a 6-Phase PMSM Controlled by Interleaved PWM (인터리브드 PWM 방식의 6상 영구자석 동기전동기 전류 맥동 및 토크 맥동 분석)

  • Jang, Won-Jin;Kim, Seong-Hoon;Jun, Bo-Sung;Kim, Hag-Wone;Cho, Kwan-Yuhl
    • The Transactions of the Korean Institute of Power Electronics
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    • v.27 no.4
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    • pp.305-315
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    • 2022
  • In this paper, phase current ripples and torque ripples of six-phase PM synchronous motor controlled by interleaved PWM are analyzed. The cause of the increase of phase current ripple in the interleaved PWM was mathematically analyzed based on the mutual inductance of stator windings and effective voltage vector. Simulation and experiment verified that the DQ current ripple and torque ripple can be reduced by interleaved PWM control. The FFT analysis of torque waveform confirmed that the magnitude of harmonic torque corresponding to double the PWM frequency was reduced.

Improvement of Initial Rotor Position Detection for Permanent-Magnet Synchronous Motor Using Magnetic Position Sensor (영구자석형 동기전동기에서 자기식 위치 센서를 사용한 초기 회전자 위치 검출 성능의 개선)

  • Park, Mun-Su;Yoon, Duck-Yong
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.22 no.6
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    • pp.398-404
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    • 2021
  • This paper proposes a method of using a magnetic position sensor to detect accurately the rotor position required to perform vector control of a permanent-magnet synchronous motor, particularly the initial rotor position at startup. In the existing vector control systems, the initial rotor position was determined using the output signals of the Hall sensors, or the control was performed in a sensorless method without using such a sensor. On the other hand, the accuracy is degraded due to the occurrence of a position detection error, and the practicality was not satisfactory. This paper attempts to detect the initial rotor position using a magnetic position sensor to solve this problem. This method is used to solve the deteriorating starting characteristics of the motor in the vector control system. In addition, to lower the price of a low-power vector control inverter, this paper proposes a method of integrating the existing sensors and reducing the price to less than half using a magnetic position sensor for speed and position detection.

Thermal Analysis of High Density Permanent Magnet Synchronous Motor Based on Multi Physical Domain Coupling Simulation

  • Chen, ShiJun;Zhang, Qi;He, Biao;Huang, SuRong;Hui, Dou-Dou
    • Journal of Electrical Engineering and Technology
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    • v.12 no.1
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    • pp.91-99
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    • 2017
  • In order to meet the thermal performance analysis accuracy requirements of high density permanent magnet synchronous motor (PMSM), a method of multi physical domain coupling thermal analysis based on control circuit, electromagnetic and thermal is presented. The circuit, electromagnetic, fluid, temperature and other physical domain are integrated and the temperature rise calculation method that considers the harmonic loss on the frequency conversion control as well as the loss non-uniformly distributed and directly mapped to the temperature field is closer to the actual situation. The key is to obtain the motor parameters, the realization of the vector control circuit and the accurate calculation and mapping of the loss. Taking a 48 slots 8 poles high density PMSM as an example, the temperature rise distribution of the key components is simulated, and the experimental platform is built. The temperature of the key components of the prototype machine is tested, which is in agreement with the simulation results. The validity and accuracy of the multi physical domain coupling thermal analysis method are verified.

Rotor Position Estimating Algorithm for PMSM Vector Control Using Rectangular 2 Hall Sensors (구형파 2-Hall Sensor를 이용한 영구자석형 동기전동기 벡터 제어의 정역회전을 위한 회전자 위치 추정 알고리즘)

  • Kong, Tae-Woong;Lee, Jung-Hyo;Yu, Jae-Sung;Lee, Won-Chul;Won, Chung-Yuen
    • Proceedings of the KIPE Conference
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    • 2007.11a
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    • pp.154-156
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    • 2007
  • This paper proposes new vector control method that using two rectangular hall sensors instead of using the expensive encoder and resolver. The proposed method is similar to T-method. But the proposed method measures the speed using two hall sensors signals instead of encoder signal. The proposed new speed estimation method is stable under the rated speed range. This algorithm will be able to moderate prices of the whole system and apply for the unfit place for use encoder and resolver.

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Vector Control of a Permanent Magnet Synchronous Motor for Elevators Using Fuzzy Controller (퍼지제어기를 이용한 엘리베이터용 영구자석형 동기 전동기 벡터제어)

  • Yu Jae-Sung;Hwang Sun-Mo;Won Chung-Yuen;Kim Sang-Hoon
    • The Transactions of the Korean Institute of Power Electronics
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    • v.10 no.6
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    • pp.534-542
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    • 2005
  • This paper proposes the fuzzy logic based vector control method for a Surface Mounted Permanent Magnet Synchronous Motor(SMPMSM) used in the elevators. The gain of a conventional PI speed controller in the elevator drive system can not be usually set high due to mechanical resonances, therefore its performance becomes deteriorated. There have been many methods to solve above problems such as an acceleration feedback in the speed controller. However, the above methods have defects that parameter information is demanded. In this paper', a Fuzzy controller(FC) is adopted in the elevator drive system. The performance of a fuzzy controller is compared with a PI controller in the no load and load conditions by simulation and experiments.

A Speed Sensorless Vector Control for Permanent Magnet Synchronous Motors based on an Adaptive Integral Binary Observer

  • Choi Yang-Kwang;Kim Young-Seok;Han Yoon-SeoK
    • KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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    • v.5B no.1
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    • pp.70-77
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    • 2005
  • This paper presents sensorless speed control of a cylindrical permanent magnet synchronous motor (PMSM) using the adaptive integral binary observer. In view of the composition with a main loop regulator and an auxiliary loop regulator, the normal binary observer has the feature of chattering alleviation in the constant boundary layer. However, the steady state estimation accuracy and robustness are dependent upon the thickness of the constant boundary layer. In order to improve the steady state performance of the binary observer, a new binary observer is formed by the addition of extra integral dynamics to the existing switching hyperplane equation. Also, because the parameters of the dynamic equations such as machine inertia or viscosity friction coefficient are not well known and these values can be changed during normal operations, there are many restrictions in the actual implementation. The proposed adaptive integral binary observer applies an adaptive scheme so that the observer may overcome the problems caused by using dynamic equations. The rotor speed is constructed by using the Lyapunov function. The observer structure and its design method are described. The experimental results of the proposed algorithm are presented to prove the effectiveness of the approach.

Torque Ripple Reduction of Interior Permanent-Magnet Synchronous Motors Driven by Torque Predictive Control (토크예측제어를 이용한 매입형 영구자석 동기전동기의 토크리플저감기법)

  • Kim, Hyunseob;Han, Jungho;Song, Joong-Ho
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.27 no.2
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    • pp.102-109
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    • 2013
  • In this paper, a new torque predictive control method of interior permanent magnet synchronous motor is developed based on an extended rotor flux. Also, a duty ratio prediction method is proposed and allows the duty ratio of the active stator voltage vector to be continuously calculated. The proposed method makes it possible to relatively reduce the torque ripple under the steady state as well as to remain the good dynamic response in the transient state. With the duty ratio prediction method, the magnitude and time interval of the active stator voltage vector applied can be continuously controlled against the varying operation conditions. This paper shows a comparative study among the switching table direct torque control(DTC), the SVM-DTC, conventional torque predictive control, and the proposed torque predictive control. Simulation results show validity and effectiveness of this work.