Performance Improvement of Existing Three Phase Synchronous Reluctance Machine: Stator Upgrading to 5-Phase With Combined Star-Pentagon Winding

Tawfiq, Kotb B.; Ibrahim, Mohamed N.; El-Kholy, E. E.; Sergeant, Peter

doi:10.1109/access.2020.3014498

Cited by 23 publications

(16 citation statements)

References 34 publications

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“…Therefore, coupling with the rotor under this excitation can be neglected and the corresponding sequence circuit can be represented by a simple series RL circuit. The voltage equations of this subspace can then be written as in ( 10) and (11).…”

Section: Machine Voltage Equationsmentioning

confidence: 99%

“…The most up-to-date research has diligently continued to shed light on the numerous advantages of this promising technology in different applications. To this end, recent literature has addressed many of the challenges, including but not limit to: control [3]- [7], modelling [8]- [10], improved winding layout designs [11][12][13][14], and innovative applications [15], [16].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Winding Configuration on Six-Phase Induction Machine Parameters and Performance

2020

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Six-phase induction machines have mostly shown promise in high-power electric drive applications as well as wind energy conversion systems. Different winding configurations for six-phase stators have been published, namely, dual three-phase (D3P), symmetrical six-phase (S6P), and asymmetrical six-phase (A6P) winding layouts. Although a body of research investigating six-phase machines and their control for different six-phase winding arrangements exists, a thorough comparative study between these different arrangements in terms of machine parameters and performance, has not been done so far. This paper employs a 12-phase stator with a configurable terminal box to compare different six-phase configurations by simply reconnecting the stator terminals of the twelve phases in different manners to obtain an equivalent six-terminal stator. This way, the same stator machine dimensions and copper volume will be assumed for all connections. The comparative study focuses on the effect of winding connection on machine parameters of the different subspaces, phase current quality and machine characteristic curves. Experimental validation has been carried out using a 1kW prototype system.

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Section: Machine Voltage Equationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Winding Configuration on Six-Phase Induction Machine Parameters and Performance

2020

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“…This technique combines the duty cycles of the rectifier with the duty cycles of the five-phase VSI to produce the duty cycles for the five-phase MC. The transformation from the indirect architecture to the direct one is derived as in Equations (5)- (7), where K is the transfer function of the direct MC, E is the transfer function for the rectifier and N is the transfer function for the five-phase VSI. Figure 1c shows how to obtain the switching control pulse in the direct topology of the switch S aA from the obtained switching control pulses of the indirect topology.…”

Section: Indirect Svm For a Five-phase MCmentioning

confidence: 99%

“…The great interest of multiphase drive systems is thanks to their advantages when compared with three-phase drive systems, in terms of high torque density, small inverter rating and the property of fault tolerance [1][2][3]. These advantages help multiphase drives to be a strong candidate for safety-critical applications like traction drives, aircraft, ships, defense and hospital applications [4][5][6][7]. Various research articles have introduced in detail the development of multiphase machines, particularly five-phase systems [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Mathematical Modelling, Analysis and Control of a Three to Five-Phase Matrix Converter for Minimal Switching Losses

et al. 2021

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The interest in motor drive systems with a number of phases greater than three has increased, mainly in high-power industrial fields due to their advantages compared with three-phase drive systems. In this paper, comprehensive mathematical modeling of a five-phase matrix converter (MC) is introduced. Besides that, the direct and indirect space vector modulation (SVM) control methods are compared and analyzed. Furthermore, a mathematical model for the MC with the transformation between the indirect and direct topology is constructed. The indirect technique is used to control the five-phase MC with minimum switching losses. In this technique, SVM deals with a five-phase MC as a virtual two-stage converter with a virtual DC link (i.e., rectifier and inverter stages). The voltage gain is limited to a value of 0.79. Moreover, to analyze the effectiveness of the control technique and the advantages of the MC, a static R-L load is employed. However, the load can also be an industrial load, such as hospital pumping or vehicular applications. The presented analysis proves that the MC gives a wide range of output frequencies, and it has the ability to control the input displacement factor and the output voltage magnitude. In addition, the absence of the massive DC link capacitors is an essential feature for the MC, resulting in increased reliability and a reduced size converter. Eventually, an experimental validation is conducted on a static load to validate the presented model and the control method. It is observed that good matching between the simulation and the experimental results is achieved.

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“…Recently, interest in synchronous reluctance machines (SynRMs) has increased remarkably thanks to their advantages compared to other types of electrical machines [1][2][3][4][5]. They offer a good torque density, a high efficiency, and a wide range of operating speeds [6].…”

Section: Introductionmentioning

confidence: 99%

Optimal Rotor Design of Synchronous Reluctance Machines Considering the Effect of Current Angle

et al. 2021

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The torque density and efficiency of synchronous reluctance machines (SynRMs) are greatly affected by the geometry of the rotor. Hence, an optimal design of the SynRM rotor geometry is highly recommended to achieve optimal performance (i.e., torque density, efficiency, and power factor). This paper studies the impact of considering the current angle as a variable during the optimization process on the resulting optimal geometry of the SynRM rotor. Various cases are analyzed and compared for different ranges of current angles during the optimization process. The analysis is carried out using finite element magnetic simulation. The obtained optimal geometry is prototyped for validation purposes. It is observed that when considering the effect of the current angle during the optimization process, the output power of the optimal geometry is about 3.32% higher than that of a fixed current angle case. In addition, during the optimization process, the case which considers the current angle as a variable has reached the optimal rotor geometry faster than that of a fixed current angle case. Moreover, it is observed that for a fixed current angle case, the torque ripple is affected by the selected value of the current angle. The torque ripple is greatly decreased by about 34.20% with a current angle of 45° compared to a current angle of 56.50°, which was introduced in previous literature.

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Performance Improvement of Existing Three Phase Synchronous Reluctance Machine: Stator Upgrading to 5-Phase With Combined Star-Pentagon Winding

Cited by 23 publications

References 34 publications

Effect of Winding Configuration on Six-Phase Induction Machine Parameters and Performance

Effect of Winding Configuration on Six-Phase Induction Machine Parameters and Performance

Mathematical Modelling, Analysis and Control of a Three to Five-Phase Matrix Converter for Minimal Switching Losses

Optimal Rotor Design of Synchronous Reluctance Machines Considering the Effect of Current Angle

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