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

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

doi:10.1109/tie.2017.2780039

Cited by 54 publications

(18 citation statements)

References 29 publications

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“…Only 1 PSM is running, the stator deformation is the biggest and asymmetric distribution, but vibration displacement value is small can be neglected. Even if the unbalanced radial electromagnetic force causes an asymmetric air-gap in a PSM, the stator current of the PSM can be detected through a frequency converter and controlled within a reasonable operating range [24], so as to ensure independent and stable operation of the SMCPMSM.…”

Section: B Electromagnetic Vibration Of Different Psmsmentioning

confidence: 99%

Analysis of Unwinding Stator Module Combined Permanent Magnet Synchronous Machine

Zhang

Guo

2020

IEEE Access

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The large permanent magnet synchronous machine(PMSM) usually adopts modularity technique to facilitate the manufacture and maintenance. In order to avoid the contact of adjacent coils between modules, a novel unwinding stator module combined permanent magnet synchronous machine (SMCPMSM) is proposed, in which each modular can operate independently. The number of input modules can be flexibly selected according to the torque requirement in the SMCPMSM of mill wrapping around to realize the optimal control of mill system efficiency. In this paper, the unwinding block method and its mathematical model of the SMCPMSM are described. The electromagnetic performance of the SMCPMSM and the operation performance of different power supply modules (PSMs) are analyzed, the radial force and electromagnetic vibration of the PSM in asymmetric operation is studied, which provides a reasonable basis for the part of PSM operation of the SMCPMSM in accordance with torque requirements.

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Section: B Electromagnetic Vibration Of Different Psmsmentioning

confidence: 99%

Analysis of Unwinding Stator Module Combined Permanent Magnet Synchronous Machine

Zhang

Guo

2020

IEEE Access

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“…Each sector is supplied by an independent inverter to achieve independently suspension force and torque control. The structure and main dimensions of the machine are described more in detail in [11]- [13]. Furthermore, in the same paper the force and torque generation principles are described.…”

Section: A Force and Torque Generationmentioning

confidence: 99%

“…Each sector is connected to an independent three-phase inverter. One machine sector occupies one third of the stator circumference and there is no overlapping between them [11]- [13]. Drive systems reliability requirements depend on the application, however, for a bearingless machine, especially when operating at high speed, the shaft touch down could be fatal, hence it has to be avoided.…”

Section: Introductionmentioning

confidence: 99%

Smart Current Limitation Technique for a Multiphase Bearingless Machine with Combined Winding System

Wen

Valente

Formentini

et al. 2019

2019 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper presents a current limitation technique for a multiphase bearingless machine featuring a combined winding system. This winding structure allows each machine phase to produce both suspension force and motoring torque. Compared to more conventional systems where two separate windings are adopted for the force and torque generation, the combined winding one leads to higher compactness and simpler manufacture. The main challenges with the combined winding configuration consist of decoupling the force and torque generation and designing a proper current limitation algorithm. The former topic has been already tackled and presented in previous publications, instead the latter will be addressed in this paper. In particular, the so called smart limitation technique will allow to prioritize either the suspension force or the torque generation. In this paper the priority is given to the rotor levitation, hence the suspension force rather than the torque is essential. The technique can be extended to give priority to the torque generation in further work and can be applied to any multiphase bearingless machine with similar winding structures. Finally, simulation results and experiment validation are provided.

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“…For instance, [25] shows that the high-frequency torque harmonics are mitigated by choosing appropriate carrier angles in dual three-phase drive systems. The high-frequency PWM-related current harmonics are known as the source of the high-frequency flux linkage harmonics, torque ripple, vibration and noise [26,27]. Therefore, it is of importance to reduce the equivalent current harmonics of the multiphase drive systems by considering the effect the CPWM technique.…”

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

Cited by 54 publications

References 29 publications

Analysis of Unwinding Stator Module Combined Permanent Magnet Synchronous Machine

Analysis of Unwinding Stator Module Combined Permanent Magnet Synchronous Machine

Smart Current Limitation Technique for a Multiphase Bearingless Machine with Combined Winding System

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

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