Performance Improvement of Bearingless Multisector PMSM With Optimal Robust Position Control

Valente, Giorgio; Formentini, Andrea; Papini, Luca; Gerada, Christopher; Zanchetta, Pericle

doi:10.1109/tpel.2018.2853038

Cited by 26 publications

(12 citation statements)

References 24 publications

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“…Further investigations on bearingless machines have been carried out in terms of machine design [20], [21], [28], [29], control performance [30], [31] and fault tolerant operation [32], [33]. Bearingless systems have been proposed for commercial applications such as compressors, spindles, drills, flywheels, and turbine generators, where high and ultra-high rotation speed is a requirement [34].…”

Section: Introductionmentioning

confidence: 99%

Power-Sharing Control in Bearingless Multi-Sector and Multi-Three-Phase Permanent Magnet Machines

Sala

Valente

Nardo

et al. 2021

IEEE Trans. Ind. Electron.

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This paper deals with the power-sharing control of bearingless multi-sector and multi-three-phase permanent magnet machines. The proposed control strategy allows to distribute the power flows among the three-phase inverters supplying the machine during bearingless operation of the drive. The control technique is based on the extension of the vector space decomposition modeling approach. The components producing the electromagnetic torque, i.e. the q-axis currents, are controlled independently from the d-axis ones, also with the aim of managing the power flows among the three-phase systems. Conversely, the d-axis currents are exploited for the generation of the radial forces needed to levitate the rotor, while considering the compensation of the forces caused by the q-axis currents in case of unbalanced power sharing strategy. The validity of the proposed method is confirmed by simulations and experimental tests on a prototyped bearingless multisector permanent magnet synchronous machine. The proposed approach is a contribution to the development of advanced control systems employing multiphase drives in the field of bearingless and multiport applications. Index Terms-Bearingless machines, force control, machine vector control, magnetic levitation, multiphase drives, permanent magnet machines, power-sharing, variable speed drives. NOMENCLATURE Pole pair number. Subscript used to identify the sub-windings under the same P th sector (= 1,2, … ,). Number of three-phase star connected windings located under each pole pair (sector). T Subscript used to distinguish the sub-windings under the same P th sector (= 1,2, … ,). ̅ , Current space vector of each T th three-phase sub-winding under the P th sector.

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Section: Introductionmentioning

confidence: 99%

Power-Sharing Control in Bearingless Multi-Sector and Multi-Three-Phase Permanent Magnet Machines

Sala

Valente

Nardo

et al. 2021

IEEE Trans. Ind. Electron.

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“…The machine can be connected to the power converters rather than directly connected to the three-phase power supply. Therefore, an arbitrary phase machine can be used as long as the phase number of the machine matches the phase number of the power converter, especially for the application of electric propulsion [2][3][4][5]. There are several reasons why the multiphase machine attracts a wide range of interest in the research community.…”

Section: Introductionmentioning

confidence: 99%

Equivalent Phase Current Harmonic Elimination in Quadruple Three-Phase Drives Based on Carrier Phase Shift Method

et al. 2020

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Multiphase drives are entering the spotlight of the research community for transportation applications with their high power density and the possibility of high fault tolerance. The multi three-phase drive is one of the main types of multiphase drives that allows for the direct adoption of commercial three-phase converters and high control flexibility. The elimination of high-frequency current harmonics will reduce the flux linkage harmonics, torque ripple, vibration and noise in machine drives. Therefore, this work introduces a new method to the modelling of equivalent phase current in multi three-phase drives with the double integral Fourier analysis method. A new carrier-based pulse-width modulation (CPWM) method is introduced to reduce the equivalent phase current harmonics by applying proper carrier phase angle to each subsystem in the multi three-phase drives. The proposed angles of carrier signals are analyzed for quadruple three-phase drives, and the corresponding experimental results confirm the significance of the proposed phase-shifted CPWM method to eliminate the equivalent phase current harmonics.

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“…[13], [14], but only a few of these methods take properly into account both the effects of magnetic saturation and airgap variation [14]. Moreover, systematic design rules for levitation control of bearingless motors are not available, apart from a recent work [15]. However, the levitation control design in [15] is based on applying a linear motor model.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, systematic design rules for levitation control of bearingless motors are not available, apart from a recent work [15]. However, the levitation control design in [15] is based on applying a linear motor model. Instead of systematically synthesizing the levitation control system, proportional-derivative (PD) or PID controllers, with trial-and-error tuning, are used [13], [16]- [18].…”

Section: Introductionmentioning

confidence: 99%

Levitation Control for a Double-Sided Bearingless Linear Motor Based on Feedback Linearization

Saarakkala

Соколов

Hosseinzadeh

et al. 2019

2019 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper deals with levitation control for a doublesided bearingless linear-motor system. Analytical design rules for a state-feedback gain and a state observer are derived. To decouple the production of forces in thrust-and normal-force directions, feedback-linearizing control based on the magnetic model is proposed. The proposed control design is tested in an experimental system consisting of four individually supplied linear-motor units in a double-sided configuration. The results from time-domain simulations and experimental tests suggest that the proposed control design can successfully provide smooth transition to contactless operation and retain the stable levitation during the movement in the thrust-force direction.

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Performance Improvement of Bearingless Multisector PMSM With Optimal Robust Position Control

Cited by 26 publications

References 24 publications

Power-Sharing Control in Bearingless Multi-Sector and Multi-Three-Phase Permanent Magnet Machines

Power-Sharing Control in Bearingless Multi-Sector and Multi-Three-Phase Permanent Magnet Machines

Equivalent Phase Current Harmonic Elimination in Quadruple Three-Phase Drives Based on Carrier Phase Shift Method

Levitation Control for a Double-Sided Bearingless Linear Motor Based on Feedback Linearization

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