The Experts below are selected from a list of 116190 Experts worldwide ranked by ideXlab platform

Zlatko Hanic - One of the best experts on this subject based on the ideXlab platform.

  • on load analysis of saturated surface permanent magnet machines using conformal mapping and magnetic Equivalent Circuits
    IEEE Transactions on Energy Conversion, 2018
    Co-Authors: Ana Hanic, Dami Zarko, Dalibo Kuhinek, Zlatko Hanic
    Abstract:

    This paper presents an iterative method based on conformal mapping and magnetic Equivalent Circuits for on-load analysis of saturated surface permanent magnet machines with integer slot and fractional slot windings. Magnetic saturation is taken into account by defining additional point wires in the stator slots and interpolar region between the magnets. The added point wires create magnetomotive force equal to the magnetic voltage drops across iron core flux tubes that are calculated using magnetic Equivalent circuit. An improved stator tooth model has been introduced that enables more accurate field calculations for tooth geometries with highly saturated tooth tips. The model also takes into account variation of permanent magnet magnetization due to external magnetic field. The proposed method has been implemented on a saturated 12 slot, 10 pole surface permanent magnet machine with nonoverlapping concentrated winding and shows a very good agreement with finite element calculations in terms of flux density, back electromotive force, and torque waveforms as well as $d$ - and $q$ -axis inductances, cross-saturation inductance, and permanent magnet flux linkage in both axes.

  • a novel method for no load magnetic field analysis of saturated surface permanent magnet machines using conformal mapping and magnetic Equivalent Circuits
    IEEE Transactions on Energy Conversion, 2016
    Co-Authors: Ana Hanic, Dami Zarko, Zlatko Hanic
    Abstract:

    The paper presents a method for calculating the back electromotive force and cogging torque waveforms of surface permanent-magnet motors using a model based on conformal mapping and magnetic Equivalent Circuits. The model takes into account the saturation of the iron core and its variation due to rotor movement. Because of the shorter execution time and achieved accuracy, it represents a good alternative to time-consuming finite-element-based models, especially in an initial stage of motor design. The proposed method has been implemented and evaluated on selected examples of 36-slot / 6-pole motors with different levels of saturation in teeth and stator yoke, and shows excellent agreement with the results obtained using finite-element method.

Longcheng Tan - One of the best experts on this subject based on the ideXlab platform.

  • Equivalent Circuits for single sided linear induction motors
    Energy Conversion Congress and Exposition, 2009
    Co-Authors: Jianguo Zhu, Yongchang Zhang, Yi Wang, Youguang Guo, Longcheng Tan
    Abstract:

    Single-sided linear induction motors (SLIMs) have lately been applied in transportation system traction drives, especially in the intermediate speed range. They have merits such as the ability to exert thrust on the secondary without mechanical contact, high acceleration or deceleration, less wheel wear, small turning circle radius and flexible road line. The theory of operation for these machines can be directly derived from rotary induction motors, but several issues involving the transversal edge and the longitudinal end effects, and half-filled slots at the primary ends, need to be investigated. In this paper, a T model Equivalent circuit is proposed which is based on one-dimensional magnetic equations of the air-gap, where half-filled slots are considered by an Equivalent pole number. Then, it deduces two-axis Equivalent Circuits to study the SLIM dynamic performance. The theoretical analyses have been validated by experimental results on SLIM prototypes.

Ana Hanic - One of the best experts on this subject based on the ideXlab platform.

  • on load analysis of saturated surface permanent magnet machines using conformal mapping and magnetic Equivalent Circuits
    IEEE Transactions on Energy Conversion, 2018
    Co-Authors: Ana Hanic, Dami Zarko, Dalibo Kuhinek, Zlatko Hanic
    Abstract:

    This paper presents an iterative method based on conformal mapping and magnetic Equivalent Circuits for on-load analysis of saturated surface permanent magnet machines with integer slot and fractional slot windings. Magnetic saturation is taken into account by defining additional point wires in the stator slots and interpolar region between the magnets. The added point wires create magnetomotive force equal to the magnetic voltage drops across iron core flux tubes that are calculated using magnetic Equivalent circuit. An improved stator tooth model has been introduced that enables more accurate field calculations for tooth geometries with highly saturated tooth tips. The model also takes into account variation of permanent magnet magnetization due to external magnetic field. The proposed method has been implemented on a saturated 12 slot, 10 pole surface permanent magnet machine with nonoverlapping concentrated winding and shows a very good agreement with finite element calculations in terms of flux density, back electromotive force, and torque waveforms as well as $d$ - and $q$ -axis inductances, cross-saturation inductance, and permanent magnet flux linkage in both axes.

  • a novel method for no load magnetic field analysis of saturated surface permanent magnet machines using conformal mapping and magnetic Equivalent Circuits
    IEEE Transactions on Energy Conversion, 2016
    Co-Authors: Ana Hanic, Dami Zarko, Zlatko Hanic
    Abstract:

    The paper presents a method for calculating the back electromotive force and cogging torque waveforms of surface permanent-magnet motors using a model based on conformal mapping and magnetic Equivalent Circuits. The model takes into account the saturation of the iron core and its variation due to rotor movement. Because of the shorter execution time and achieved accuracy, it represents a good alternative to time-consuming finite-element-based models, especially in an initial stage of motor design. The proposed method has been implemented and evaluated on selected examples of 36-slot / 6-pole motors with different levels of saturation in teeth and stator yoke, and shows excellent agreement with the results obtained using finite-element method.

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

  • Equivalent Circuits for single sided linear induction motors
    Energy Conversion Congress and Exposition, 2009
    Co-Authors: Jianguo Zhu, Yongchang Zhang, Yi Wang, Youguang Guo, Longcheng Tan
    Abstract:

    Single-sided linear induction motors (SLIMs) have lately been applied in transportation system traction drives, especially in the intermediate speed range. They have merits such as the ability to exert thrust on the secondary without mechanical contact, high acceleration or deceleration, less wheel wear, small turning circle radius and flexible road line. The theory of operation for these machines can be directly derived from rotary induction motors, but several issues involving the transversal edge and the longitudinal end effects, and half-filled slots at the primary ends, need to be investigated. In this paper, a T model Equivalent circuit is proposed which is based on one-dimensional magnetic equations of the air-gap, where half-filled slots are considered by an Equivalent pole number. Then, it deduces two-axis Equivalent Circuits to study the SLIM dynamic performance. The theoretical analyses have been validated by experimental results on SLIM prototypes.

Yongchang Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Equivalent Circuits for single sided linear induction motors
    IEEE Transactions on Industry Applications, 2010
    Co-Authors: Wei Xu, Yongchang Zhang, Zixin Li, Yaohua Li, Yi Wang, Yongjian Li
    Abstract:

    Single-sided linear induction motors (SLIMs) have lately been applied in transportation system traction drives, particularly in the intermediate speed range. This is because they have merits, such as the ability to exert thrust on the secondary without mechanical contact, high acceleration or deceleration, less wheel wear, small turning circle radius, and flexible road line. The theory of operation for these machines can be directly derived from rotary induction motors (RIMs). However, while the cut-open primary magnetic circuit has many inherent characteristics of the RIM Equivalent Circuits, several issues involving the transversal edge and longitudinal end effects and the half-filled slots at the primary ends need to be investigated. In this paper, a T-model Equivalent circuit is proposed which is based on the 1-D magnetic equations of the air gap, where half-filled slots are considered by an Equivalent pole number. Among the main five parameters, namely, the primary resistance, primary leakage inductance, mutual inductance, secondary resistance, and secondary inductance, the mutual inductance and the secondary resistance are influenced by the edge and end effects greatly, which can be revised by four relative coefficients, i.e., Kr, Kx, Cr, and Cx. Moreover, two-axis Equivalent Circuits (dq or αβ) according to the T-model Equivalent circuit are obtained using the power conversion rule, which are analogous with those of the RIM in a two-axis coordinate system. The linear induction motor dynamic performance, particularly the mutual inductance and the secondary resistance, can be analyzed by the four coefficients. Experimental verification indicates that both the T-model and the new two-axis Circuits are reasonable for describing the steady and dynamic performance of the SLIM. These two models can provide good guidance for the electromagnetic design and control scheme implementation for SLIM applications.

  • Equivalent Circuits for single sided linear induction motors
    Energy Conversion Congress and Exposition, 2009
    Co-Authors: Jianguo Zhu, Yongchang Zhang, Yi Wang, Youguang Guo, Longcheng Tan
    Abstract:

    Single-sided linear induction motors (SLIMs) have lately been applied in transportation system traction drives, especially in the intermediate speed range. They have merits such as the ability to exert thrust on the secondary without mechanical contact, high acceleration or deceleration, less wheel wear, small turning circle radius and flexible road line. The theory of operation for these machines can be directly derived from rotary induction motors, but several issues involving the transversal edge and the longitudinal end effects, and half-filled slots at the primary ends, need to be investigated. In this paper, a T model Equivalent circuit is proposed which is based on one-dimensional magnetic equations of the air-gap, where half-filled slots are considered by an Equivalent pole number. Then, it deduces two-axis Equivalent Circuits to study the SLIM dynamic performance. The theoretical analyses have been validated by experimental results on SLIM prototypes.