A Self-Bearing 8/6 Switched Reluctance Motor

Aino Manninen, Victor Mukherjee, Jenni Pippuri, Kari Tammi

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

    Abstract

    This paper describes a self-bearing 8/6 switched reluctance motor (SRM). The main challenge with such a motor is how to control both torque and radial forces. This task is particularly challenging because the double saliency of the machine type causes the characteristics of the motor to be highly nonlinear. In this paper, we first present a switching logic for the 8 stator coils. The current in the 8 phases is defined by using three current components and the rotor angle. After that, we propose a model that could be used in the closed loop control to solve the required stator currents from needed radial forces and torque. The force and torque models are based on first and second order polynomials, which are fitted to data that have been obtained by two-dimensional electromagnetic finite element analysis. In this paper we compare the performance of the analytical model with the finite element analysis data, and use the analytical model for direct open loop control. The results show that the proposed analytical model can be used to calculate the required stator currents that are needed to operate the self-bearing SRM. The models can be combined with closed loop control methods in order to properly control the machine.
    Original languageEnglish
    Title of host publicationProceedings of ISMB15
    Number of pages8
    Publication statusPublished - 2016
    MoE publication typeNot Eligible
    Event15th International Symposium on Magnetic Bearings, ISMB15 - Kitakyushu, Japan
    Duration: 3 Aug 20166 Aug 2016

    Conference

    Conference15th International Symposium on Magnetic Bearings, ISMB15
    Abbreviated titleISMB15
    CountryJapan
    CityKitakyushu
    Period3/08/166/08/16

    Fingerprint

    Bearings (structural)
    Reluctance motors
    Stators
    Analytical models
    Torque
    Finite element method
    Torque control
    Rotors
    Polynomials

    Keywords

    • switched reluctance machines
    • self-bearing machines
    • modelling
    • control
    • finite element method

    Cite this

    Manninen, A., Mukherjee, V., Pippuri, J., & Tammi, K. (2016). A Self-Bearing 8/6 Switched Reluctance Motor. In Proceedings of ISMB15
    Manninen, Aino ; Mukherjee, Victor ; Pippuri, Jenni ; Tammi, Kari. / A Self-Bearing 8/6 Switched Reluctance Motor. Proceedings of ISMB15. 2016.
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    title = "A Self-Bearing 8/6 Switched Reluctance Motor",
    abstract = "This paper describes a self-bearing 8/6 switched reluctance motor (SRM). The main challenge with such a motor is how to control both torque and radial forces. This task is particularly challenging because the double saliency of the machine type causes the characteristics of the motor to be highly nonlinear. In this paper, we first present a switching logic for the 8 stator coils. The current in the 8 phases is defined by using three current components and the rotor angle. After that, we propose a model that could be used in the closed loop control to solve the required stator currents from needed radial forces and torque. The force and torque models are based on first and second order polynomials, which are fitted to data that have been obtained by two-dimensional electromagnetic finite element analysis. In this paper we compare the performance of the analytical model with the finite element analysis data, and use the analytical model for direct open loop control. The results show that the proposed analytical model can be used to calculate the required stator currents that are needed to operate the self-bearing SRM. The models can be combined with closed loop control methods in order to properly control the machine.",
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    Manninen, A, Mukherjee, V, Pippuri, J & Tammi, K 2016, A Self-Bearing 8/6 Switched Reluctance Motor. in Proceedings of ISMB15. 15th International Symposium on Magnetic Bearings, ISMB15, Kitakyushu, Japan, 3/08/16.

    A Self-Bearing 8/6 Switched Reluctance Motor. / Manninen, Aino; Mukherjee, Victor; Pippuri, Jenni; Tammi, Kari.

    Proceedings of ISMB15. 2016.

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific

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    T1 - A Self-Bearing 8/6 Switched Reluctance Motor

    AU - Manninen, Aino

    AU - Mukherjee, Victor

    AU - Pippuri, Jenni

    AU - Tammi, Kari

    N1 - Project code: 101021 Registration required

    PY - 2016

    Y1 - 2016

    N2 - This paper describes a self-bearing 8/6 switched reluctance motor (SRM). The main challenge with such a motor is how to control both torque and radial forces. This task is particularly challenging because the double saliency of the machine type causes the characteristics of the motor to be highly nonlinear. In this paper, we first present a switching logic for the 8 stator coils. The current in the 8 phases is defined by using three current components and the rotor angle. After that, we propose a model that could be used in the closed loop control to solve the required stator currents from needed radial forces and torque. The force and torque models are based on first and second order polynomials, which are fitted to data that have been obtained by two-dimensional electromagnetic finite element analysis. In this paper we compare the performance of the analytical model with the finite element analysis data, and use the analytical model for direct open loop control. The results show that the proposed analytical model can be used to calculate the required stator currents that are needed to operate the self-bearing SRM. The models can be combined with closed loop control methods in order to properly control the machine.

    AB - This paper describes a self-bearing 8/6 switched reluctance motor (SRM). The main challenge with such a motor is how to control both torque and radial forces. This task is particularly challenging because the double saliency of the machine type causes the characteristics of the motor to be highly nonlinear. In this paper, we first present a switching logic for the 8 stator coils. The current in the 8 phases is defined by using three current components and the rotor angle. After that, we propose a model that could be used in the closed loop control to solve the required stator currents from needed radial forces and torque. The force and torque models are based on first and second order polynomials, which are fitted to data that have been obtained by two-dimensional electromagnetic finite element analysis. In this paper we compare the performance of the analytical model with the finite element analysis data, and use the analytical model for direct open loop control. The results show that the proposed analytical model can be used to calculate the required stator currents that are needed to operate the self-bearing SRM. The models can be combined with closed loop control methods in order to properly control the machine.

    KW - switched reluctance machines

    KW - self-bearing machines

    KW - modelling

    KW - control

    KW - finite element method

    M3 - Conference article in proceedings

    BT - Proceedings of ISMB15

    ER -

    Manninen A, Mukherjee V, Pippuri J, Tammi K. A Self-Bearing 8/6 Switched Reluctance Motor. In Proceedings of ISMB15. 2016