Analysis and control of seven-phase permanent-magnet bearingless motor with single set of half-coiled winding

Li, Bingnan; Huang, Jin; Liu, He; Hou, Zhaowen

doi:10.1109/isie.2014.6864938

Cited by 4 publications

(3 citation statements)

References 21 publications

(23 reference statements)

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“…where k is the number of the slot where each phase appears following the slots clockwise, i k is the current in the k th slot and ϕ k is equal to 2π 18 (k − 1). The expression of the resultant force vector can be written as follows, observing (11) and (12), and considering the pole pairs number of the machine (p = 3):…”

Section: B Theoretical Description Of the Torque And Radial Force Control Methodsmentioning

confidence: 99%

Space Vectors and Pseudoinverse Matrix Methods for the Radial Force Control in Bearingless Multisector Permanent Magnet Machines

Sala

Valente

Formentini

et al. 2018

IEEE Trans. Ind. Electron.

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Two different approaches to characterize the torque and radial force production in a Bearingless Multi-Sector Permanent Magnet (BMSPM) machine are presented in this work. The first method consists of modelling the motor in terms of torque and force production as a function of the stationary reference frame α − β currents. The current control reference signals are then evaluated adopting the Joule losses minimization as constrain by means of the pseudo inverse matrix. The second method is based on the control of the magnetic field harmonics in the airgap through the current Space Vector (SV) technique. Once the magnetic field harmonics involved in the torque and force production are determined, the SV transformation can be defined to obtain the reference current space vectors. The methods are validated by numerical simulations, Finite Element Analysis (FEA) and experimental tests. The differences in terms of two Degrees of Freedom (DOF) levitation performance and efficiency are highlighted in order to give the reader an indepth comparison of the two methods.

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Section: B Theoretical Description Of the Torque And Radial Force Control Methodsmentioning

confidence: 99%

Space Vectors and Pseudoinverse Matrix Methods for the Radial Force Control in Bearingless Multisector Permanent Magnet Machines

Sala

Valente

Formentini

et al. 2018

IEEE Trans. Ind. Electron.

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“…For the sake of brevity only the analytical expression of the reference d − q axis current of sector 1 is reported in (17).…”

Section: Post-processing Analysismentioning

confidence: 99%

“…As a matter of facts, adopting an ad hoc winding arrangement, it is possible to embed the force and torque capabilities in multiple winding structures. Fiveand seven-phase bearingless motors are analysed in [16], [17] where multiple orthogonal d-q planes are employed for torque and suspension force production. In [18] the force and torque produced in a six-phase slice permanent magnet bearingless motor are controlled by solving an optimization problem that minimizes the Joule losses in the machine.…”

mentioning

confidence: 99%

Radial Force Control of Multisector Permanent-Magnet Machines for Vibration Suppression

Valente

Papini

Formentini

et al. 2018

IEEE Trans. Ind. Electron.

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Abstract-Radial force control in electrical machines has been widely investigated for a variety of bearingless machines as well as for conventional structures featuring mechanical bearings. This work takes advantage of the spatial distribution of the winding sets within the stator structure in Multi-Sector Permanent Magnet machine towards achieving a controllable radial force. An alternative force control technique for Multi-Sector Permanent Magnet machines is presented. The mathematical model of the machine and the theoretical investigation of the force production principle are provided. A novel force control methodology based on the minimization of the copper losses is described and adopted to calculate the d-q axis current references. The predicted performances of the considered machine are benchmarked against Finite Element Analysis. Experimental validation of the proposed control strategy is presented focusing on the suppression of selected vibration frequencies for different rotational speeds.

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Overmodulation of seven-phase systems using minimum infinity norm

Komrska

Glasberger

Peroutka

2017

2017 IEEE 12th International Conference on Power Electronics and Drive Systems (PEDS)

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Analysis and control of seven-phase permanent-magnet bearingless motor with single set of half-coiled winding

Cited by 4 publications

References 21 publications

Space Vectors and Pseudoinverse Matrix Methods for the Radial Force Control in Bearingless Multisector Permanent Magnet Machines

Space Vectors and Pseudoinverse Matrix Methods for the Radial Force Control in Bearingless Multisector Permanent Magnet Machines

Radial Force Control of Multisector Permanent-Magnet Machines for Vibration Suppression

Overmodulation of seven-phase systems using minimum infinity norm

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