Design methodology for a special single winding based bearingless switched reluctance motor

Choudhury, Madhurjya Dev; Ahmed, Firdausa; Kumar, Gaurav; Kalita, Karuna; Tammi, Kari

doi:10.1049/joe.2016.0368

Cited by 16 publications

(7 citation statements)

References 18 publications

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“…The finite element results are compared with the ones predicted by equation (26). The mismatch between finite element and analytical results is mainly caused by the reluctance force, not included in the presented model.…”

Section: Case Study: Radial Forces In a Triple-three-phase Multi-smentioning

confidence: 99%

“…During the power-sharing operation the q-axis components of the inverter currents are generally controlled to different set points. The radial force that results from this unbalanced operation is represented by the second contribution in (25), highlighted in (26), and it cannot be altered. Therefore, the control of the radial force must be implemented by exploiting the d-axis components of the inverters' currents in the most efficient manner.…”

Section: Bearingless Control With Power-sharing Algorithm For Permentioning

confidence: 99%

“…Among the combined winding it is worth mentioning also bridge and parallel path layouts. These configurations have the potential advantage of being "novoltage" designs, since the suspension terminals do not see an induced voltage by the rotor flux (motional electromotive force) [26], [27]. The multiphase solution is chosen in this paper, instead of a separate winding arrangement, because the stator slot area hosting the suspension winding can cover about 25-40% of the available space.…”

Section: Introductionmentioning

confidence: 99%

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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: Case Study: Radial Forces In a Triple-three-phase Multi-smentioning

confidence: 99%

Section: Bearingless Control With Power-sharing Algorithm For Permentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…Bearing switched reluctance motor (BSRM) combines the properties of magnetic bearing and switched reluctance motor (SRM) to realize the suspension of motor rotor, which has the advantages of high speed, high output power, low cost, and low loss [1][2][3]. These features make it have a good prospect in high speed flywheel energy storage and other applications.…”

Section: Introductionmentioning

confidence: 99%

Direct Suspension Force Control of Hybrid Stator Bear-Ingless Switched Reluctance Motor Based on Quasi-Continuous Three-Order Sliding Mode

Huang¹,

Shi²,

Yuan³

et al. 2019

PIER M

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In order to solve the problem of strong coupling between torque and suspension force of bearingless switching motor and the strong chattering of sliding mode control, a direct suspension force control method for hybrid stator bearingless switched reluctance motor based on quasi-continuous thirdorder sliding mode is proposed. According to the special structure of hybrid stator bearingless switched reluctance motor, the direct decoupling of torque and suspension force is realized. The suspension force control system adopts the direct suspension force control of the third-order sliding mode. By comparing with the second-order sliding mode control system under the condition of interference source and non-interference source, the results show that the designed control strategy has high precision, strong robustness, fast convergence speed, and it can effectively decrease vibration.

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“…Recently, Rajadurai et al [14] analyzed the queueing system with optional re-service under modified vacation policy. Most recently, Choudhury and Chandi Ram Kalita [6] studied the queueing model with two types of service and optional repeated service. For this model, they derived the joint distribution of state of the server and queue size by considering both elapsed and remaining service time.…”

Section: Introductionmentioning

confidence: 99%

Analysis of an $M^{[X]}/ G_{1}(a,b),G_{2}(a,b)/1$ unreliable G-queue with optional re-service, Bernoulli vacation, delay time to two phase of repair

Ayyappan¹,

Supraja²

2018

Malaya J. Mat.

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In this paper, we consider the queueing system where the batch of customers arrive at the system according to the compound Poisson process and two types of service, each of which has an optional reservice is provided to the server under Bernoulli vacation. After completion of each type of service, the customer may go for reservice of the same type of service without joining the tail of the queue or they may depart the system. An unpredictable breakdown may occur at any moment during the functioning of the server with any type of service or re-service and at that situation, the service channel will breakoff for a short period of time. A breakdown in a busy server is represented by the arrival of a negative customer which consequently leads to the loss of the customer who is in service. Delay time is referred to as the waiting time of the server for the two phase of repair to start. By considering elapsed service time as the supplementary variable, the PGF of the number of customers in the queue at a random epoch is derived and this PGF is further used to establish explicitly some of the following performance measures namely various states of the system, the mean queue length, and the mean waiting time in the queue. At last, some particular cases are discussed and the numerical illustrations are provided.

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Design methodology for a special single winding based bearingless switched reluctance motor

Cited by 16 publications

References 18 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

Direct Suspension Force Control of Hybrid Stator Bear-Ingless Switched Reluctance Motor Based on Quasi-Continuous Three-Order Sliding Mode

Analysis of an $M^{[X]}/ G_{1}(a,b),G_{2}(a,b)/1$ unreliable G-queue with optional re-service, Bernoulli vacation, delay time to two phase of repair

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