The Experts below are selected from a list of 2637 Experts worldwide ranked by ideXlab platform

Shigeru Okuma - One of the best experts on this subject based on the ideXlab platform.

  • an extended Electromotive Force model for sensorless control of interior permanent magnet synchronous motors
    IEEE Transactions on Industrial Electronics, 2003
    Co-Authors: Zhiqian Chen, Mutuwo Tomita, Shinji Doki, Shigeru Okuma
    Abstract:

    During the last decade, many sensorless control methods have been proposed for surface permanent-magnet synchronous motors (SPMSMs) based on the estimation of Electromotive Force (Emf) in which the motor's position information is contained. However, these methods cannot be applied to interior PMSMs (IPMSMs) directly, because the position information is contained in not only the Emf, but also the inductance of stators. In this paper, a new mathematical model for IPMSMs is proposed and an extended Emf is defined, which includes both position information from the Emf and the stator inductance. By using the newly proposed model, sensorless controls proposed for SPMSMs can easily be applied to IPMSMs. As an example, a disturbance observer is studied and the experimental results show that the proposed method on the proposed model is very effective.

  • sensorless control of interior permanent magnet synchronous motor by estimation of an extended Electromotive Force
    IEEE Industry Applications Society Annual Meeting, 2000
    Co-Authors: Zhiqian Chen, Mutuwo Tomita, Shinji Ichikawa, Shinji Doki, Shigeru Okuma
    Abstract:

    Recently, many methods have been proposed for surface permanent magnet synchronous motor (SPMSM) sensorless control based on an estimation of Electromotive Force (Emf), in which the motor's position information is included. However, these methods cannot be applied to internal permanent magnet synchronous motors (IPMSMs) directly, because the position information is included in not only the Emf but also the inductance of stator. In this paper, a new mathematical model for IPMSMs is proposed and an extended Emf is defined, which includes both position information from the Emf and the stator inductance. As a result sensorless controls for SPMSMs can easily be applied to IPMSMs. As an example, a disturbance observer is studied and the experimental results show that the proposed method is very effective.

Changliang Xia - One of the best experts on this subject based on the ideXlab platform.

  • new sliding mode observer for position sensorless control of permanent magnet synchronous motor
    IEEE Transactions on Industrial Electronics, 2013
    Co-Authors: Zhaowei Qiao, Tingna Shi, Yindong Wang, Yan Yan, Changliang Xia
    Abstract:

    This paper proposes a novel sliding-mode observer (SMO) to achieve the sensorless control of permanent-magnet synchronous motor (PMSM). An observer is built according to the back Electromotive Force (Emf) model after the back Emf equivalent signal is obtained. In this way, not only are low-pass filter and phase compensation module eliminated, but also estimation accuracy is improved. Numerical simulations and experiments with an 11-kW low-speed PMSM are carried out. The results demonstrate that the novel SMO can effectively estimate rotor position and speed and achieve good static and dynamic performance.

Z Q Zhu - One of the best experts on this subject based on the ideXlab platform.

  • analytical on load subdomain field model of permanent magnet vernier machines
    IEEE Transactions on Industrial Electronics, 2016
    Co-Authors: Yasemin Oner, Z Q Zhu, Hanlin Zhan, J T Chen
    Abstract:

    Permanent-magnet vernier machine (PMVM) is a relatively new type of PM machines. An analytical subdomain model accounting for tooth-tips and flux modulation poles is developed to accurately predict on-load field distributions in PMVMs. Based on two-dimensional (2-D) polar coordinate and magnetic vector potential, this method solves the Maxwell’s equations in slot, air-gap, flux modulation pole slot (FMPS), and PM regions. Consequently, the electromagnetic performance such as cogging torque, back-Electromotive Force (Emf), electromagnetic torque, power factor, and magnet loss are calculated. In addition, the model can also be used for the evaluation of demagnetization withstand capability. The finite-element analysis (FEA) and experimental results validate the accuracy of the developed analytical model.

  • analytical modeling of surface mounted pm machines accounting for magnet shaping and varied magnet property distribution
    IEEE Transactions on Magnetics, 2014
    Co-Authors: Z Q Zhu
    Abstract:

    This paper develops an analytical model for predicting the magnetic field, back-Electromotive Force (Emf), and electromagnetic torque of surface-mounted permanent magnet machines accounting for magnet geometrical shaping and varied magnet property distribution. The magnets on the rotor are represented by the remanence, thickness, and magnetization direction functions. They are finitely segmented into magnet pieces of simple regular shape and uniform magnet property. The magnetic field of the machine is obtained by the superposition of the magnetic field due to each segment. The back-Emf and electromagnetic torque are also calculated. Using the developed model, the technique of mixed magnet material is investigated on a four-pole/six-slot machine. The analytical predictions are verified by both finite element and experimental results.

  • winding configurations and optimal stator and rotor pole combination of flux switching pm brushless ac machines
    IEEE Transactions on Energy Conversion, 2010
    Co-Authors: J T Chen, Z Q Zhu
    Abstract:

    A simple analytical method is developed to compare the combinations of stator and rotor pole numbers in flux-switching permanent magnet (PM) machines in terms of back Electromotive Force (Emf) and electromagnetic torque. The winding connections and winding factors of machines having all poles and alternate poles wound, and different numbers of phases, from two to six, are determined by the coil-Emf vectors. Their differences from analyzing the conventional fractional-slot PM machines with concentrated nonoverlapping windings are highlighted. The general conditions are established for balanced symmetrical back-Emf waveform. It shows that the optimized rotor pole number should be close to the number of stator poles, whereas larger torque can be obtained by the machine with relatively higher rotor pole number. The analysis is validated by finite-element analyses and experiment.

Zhiqian Chen - One of the best experts on this subject based on the ideXlab platform.

  • an extended Electromotive Force model for sensorless control of interior permanent magnet synchronous motors
    IEEE Transactions on Industrial Electronics, 2003
    Co-Authors: Zhiqian Chen, Mutuwo Tomita, Shinji Doki, Shigeru Okuma
    Abstract:

    During the last decade, many sensorless control methods have been proposed for surface permanent-magnet synchronous motors (SPMSMs) based on the estimation of Electromotive Force (Emf) in which the motor's position information is contained. However, these methods cannot be applied to interior PMSMs (IPMSMs) directly, because the position information is contained in not only the Emf, but also the inductance of stators. In this paper, a new mathematical model for IPMSMs is proposed and an extended Emf is defined, which includes both position information from the Emf and the stator inductance. By using the newly proposed model, sensorless controls proposed for SPMSMs can easily be applied to IPMSMs. As an example, a disturbance observer is studied and the experimental results show that the proposed method on the proposed model is very effective.

  • sensorless control of interior permanent magnet synchronous motor by estimation of an extended Electromotive Force
    IEEE Industry Applications Society Annual Meeting, 2000
    Co-Authors: Zhiqian Chen, Mutuwo Tomita, Shinji Ichikawa, Shinji Doki, Shigeru Okuma
    Abstract:

    Recently, many methods have been proposed for surface permanent magnet synchronous motor (SPMSM) sensorless control based on an estimation of Electromotive Force (Emf), in which the motor's position information is included. However, these methods cannot be applied to internal permanent magnet synchronous motors (IPMSMs) directly, because the position information is included in not only the Emf but also the inductance of stator. In this paper, a new mathematical model for IPMSMs is proposed and an extended Emf is defined, which includes both position information from the Emf and the stator inductance. As a result sensorless controls for SPMSMs can easily be applied to IPMSMs. As an example, a disturbance observer is studied and the experimental results show that the proposed method is very effective.

Siyuan Liu - One of the best experts on this subject based on the ideXlab platform.

  • sensorless control of ship propulsion interior permanent magnet synchronous motor based on a new sliding mode observer
    Isa Transactions, 2015
    Co-Authors: Junjie Ren, Yancheng Liu, Ning Wang, Siyuan Liu
    Abstract:

    Abstract This paper proposes a sensorless speed control strategy for ship propulsion interior permanent magnet synchronous motor (IPMSM) based on a new sliding-mode observer (SMO). In the SMO the low-pass filter and the method of arc-tangent calculation of extended Electromotive Force (Emf) or phase-locked loop (PLL) technique are not used. The calculation of the rotor speed is deduced from the Lyapunov function stability analysis. In order to reduce system chattering, sigmoid functions with switching gains being adaptively updated by fuzzy logic systems are innovatively incorporated into the SMO. Finally, simulation results for a 4.088 MW ship propulsion IPMSM and experimental results from a 7.5 kW IPMSM drive are provided to verify the effectiveness of the proposed SMO method.