• Title, Summary, Keyword: Flux linkage model

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A MRAS Speed and Stator Flux Linkage Estimator for Permanent Magnet Synchronous Motor drives with parameter identification (파라미터 산정과 영구자석 동기전동기 제어를 위한 MRAS Speed 와 Stator Flux Linkage 추정량)

  • Lin, Hai;Kwon, Byung-Il
    • Proceedings of the KIEE Conference
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    • pp.830-831
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    • 2011
  • The paper makes an investigation on a speed and stator flux linkage estimator for permanent magnet synchronous motor (PMSM) sensorless drives using the technology of model reference adaptive system (MRAS). The designed estimator including two models and two adaptive estimating laws is proved to be stable by the Popov hyper-stability theory. The speed, the stator flux linkage and the resistance are estimated accurately by the proposed estimator while overcoming the shortcoming of the traditional one. The experiment results demonstrate its effectiveness.

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Indirect Detection of Rotor Position of Switched Reluctance Motor Based on Flux Linkage Analytic Model

  • Zhou, Yongqin;Hu, Bo;Wang, Hang;Jin, Ningzhi;Zhou, Meilan
    • Journal of Electrical Engineering and Technology
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    • v.13 no.2
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    • pp.829-837
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    • 2018
  • In this paper, a flux linkage model based on four magnetization curves fitting is proposed for three-phase 12/8 switched reluctance motor (SRM), with the analysis of the basic principle of flux detection method and function analysis method. In the model, the single value function mapping relationship between position angle and flux is established, which can achieve a direct estimation of rotor position. The realization scheme of SRM indirect position detection system is presented. It is proved by simulation and experiment that the proposed scheme is suitable for rotor position detection of SRM, and has high accuracy of position estimation.

Field Winding Optimization of Superconducting Motor for Flux-linkage Enhancement (초전도모터 쇄교자속 향상을 위한 계자권선 최적 설계)

  • 강준선;이준호;박일한;나완수;주진호;권영길;손명환;김석환
    • Proceedings of the Korea Institute of Applied Superconductivity and Cryogenics Conference
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    • pp.280-283
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    • 2003
  • To enhance the performance of superconducting motor, the flux which links the stator windings needs to be increased as much as possible. In this paper we redistributed the field winding to increase the flux-linkage. This paper introduces an algorithm that modifies the rotor winding shape to increase the flux-linkage to stator winding, satisfying both the constant superconductor volume and HTS tape characteristic (I$_{c}$-B curve) constraints. To check the validness of the proposed algorithm, it was applied to the 100 Hp HTS motor model, and about 21 % increase of flux-linkage was confirmed depending on the initial winding shape.e.

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An Improved Flux Observer for Sensorless Permanent Magnet Synchronous Motor Drives with Parameter Identification

  • Lin, Hai;Hwang, Kyu-Yun;Kwon, Byung-Il
    • Journal of Electrical Engineering and Technology
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    • v.8 no.3
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    • pp.516-523
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    • 2013
  • This paper investigates an improved stator flux linkage observer for sensorless permanent magnet synchronous motor (PMSM) drives using a voltage-based flux linkage model and an adaptive sliding mode variable structure. We propose a new observer design that employs an improved sliding mode reaching law to achieve better estimation accuracy. The design includes two models and two adaptive estimating laws, and we illustrate that the design is stable using the Popov hyper-stability theory. Simulation and experimental results demonstrate that the proposed estimator accurately calculates the speed, the stator flux linkage, and the resistance while overcoming the shortcomings of traditional estimators.

Variable Characteristics of Inductance Profile and Flux Linkage for SRM (SRM의 인덕턴스 및 쇄교자속 변화 특성)

  • Choi, Kyeong-Ho;Back, Won-Sik;Kim, Dong-Hee;Kim, Min-Huei
    • Proceedings of the KIEE Conference
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    • pp.156-159
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    • 2001
  • This Paper analysis variable characteristics of inductance profiles and basic magnetic fields for Switched Reluctance Motors(SRM). The varying Inductance and flux linkage on operating control condition are very important for developing control algorithm and SRM accurate drive system. Therefore, we have analytical model for varying inductance and flux linkage with simulation and experimental mothed, and to find an analytical expression for the SRM coenergy. There are shown some good results that comparison of simulated and analytical inductance, flux linkage and current waves.

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Calculation method of d,q axis linkage flux considering ripple characteristics in multilayer-buried IPMSM (다층 매입형 영구자석 전동기의 리플현상을 고려한 d,q축 쇄교자속 계산)

  • Woo, Dong-Kyun;Kwak, Sang-Yeop;Seo, Jang-Ho;Jung, Hyun-Kyo
    • Proceedings of the KIEE Conference
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    • pp.776-777
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    • 2008
  • It is important to understand the relationship accurately between linkage flux distributions and machine characteristics for better design of multilayer-buried interior permanent magnet synchronous machines(IPMSM). This paper presents a improved calculation method for linkage flux of multilayer-buried IPMSM. From the analysis result, The proposed method shows that the calculated d,q linkage flux reflects a electromagnetic characteristic well in analysis model.

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Instantaneous Torque Control of Brushless Direct Drive Motor With Linkage Flux Estimation (쇄교자속 추정에 의한 브러쉬없는 직접 구동용 전동기의 순시 토오크제어)

  • Kim, Hyun-Soo;Chung, Se-Kyo;Kim, Kyeong-Hwa;Youn, Myung-Joong
    • Proceedings of the KIEE Conference
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    • pp.574-577
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    • 1996
  • In order to reduce the torque pulsation caused by non-sinusoidal flux distribution of the brushless direct drive motor(BLDDM), a new torque control technique is proposed. The linkage flux of the BLDDM is first estimated by using the model reference adaptive system (MRAS) technique and the instantaneous torque of the BLDDM is then estimated from the mathematical model including this estimated linkage flux. By using the estimated instantaneous torque of the BLDDM, the minor torque control loop to suppress the undesirable torque pulsation is designed. To show the effectiveness of the proposed control scheme, the simulations and experiments are carried out for the DSP-based BLDDM drive system with a power rate of 120W. It is well demonstrated from these results that the torque and speed control performance of the BLDDM is much improved by employing the proposed control scheme.

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Torque Ripple Reduction based on Flux Linkage Harmonics Observer for an Interior PM Synchronous Motor including Back EMF Harmonics (왜곡된 역기전력을 갖는 매입형 영구자석 동기전동기의 쇄교자속 고조파 관측기를 이용한 토크리플 저감)

  • Jin, Yong-Sin;Kim, Hag-Wone;Cho, Kwan-Yuhl;Lim, Byung-Kuk
    • The Transactions of the Korean Institute of Power Electronics
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    • v.18 no.4
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    • pp.367-375
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    • 2013
  • The mechanical vibration of a PM synchronous motor at low speeds due to the back emf harmonics may be serious problems in some application such as MDPS(Motor driven power steering), electric vehicles. In this paper, torque ripple reduction for an interior PM synchronous motor including back emf harmonics is proposed. The dq flux linkage harmonics of the permanent magnet are estimated on real time by using the dq currents of the real system and the model of the MRAS observer. Based on the estimated flux linkage harmonics, the dq harmonic currents for reducing the torque ripples are compensated on the dq reference currents. The estimation of the flux linkage harmonics by the MRAS observer and the torque ripple reduction of the proposed algorithm was verified by the simulation and experiment.

Adaptive Flux Observer with On-line Inductance Estimation of an Interior PM Synchronous Machine Considering Magnetic Saturation

  • Jeong, Yu-Seok;Lee, Jun-Young
    • Journal of Power Electronics
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    • v.9 no.2
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    • pp.188-197
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    • 2009
  • This paper presents an adaptive flux observer to estimate stator flux linkage and stator inductances of an interior permanent-magnet synchronous machine considering magnetic saturation. The concept of static and dynamic inductances due to saturation is introduced in the machine model to describe the relationship between current and flux linkage and the relationship between their time derivatives. A flux observer designed in the stationary reference frame with constant inductance is analyzed in the rotor reference frame by a frequency-response characteristic. An adaptive algorithm for an on-line inductance estimation is proposed and a Lyapunov-based analysis is given to discuss its stability. The dynamic inductances are estimated by using Taylor approximation based on the static inductances estimated by the adaptive method. The simulation and experimental results show the feasibility and performance of the proposed technique.

A Operation Characteristic Analysis of SRM with Nonlinear Magnetic Circuit Effect (자기회로의 비선형성을 고려한 SRM의 운전 특성 해석)

  • Choi Kyeong-Ho;Baik Won-Sik;Kim Dong-Hee;Kim Min-Huei
    • Proceedings of the KIPE Conference
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    • pp.940-943
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    • 2004
  • This Paper analysis variable characteristics of inductance profiles and basic magnetic fields for Switched Reluctance Motors(SRM). The varying Inductance and flux linkage on operating control condition are very important for developing control algorithm and SRM accurate drive system. Therefore, we have analytical model for varying inductance and flux linkage with simulation and experimental method, and to find an analytical expression for the SRM coenergy. There are shown some good results that comparison of simulated and analytical inductance, flux linkage and current waves.

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