An Approach to Maximize Torque Density in a Brushless Doubly Fed Reluctance Machine

Agrawal, Shivang; Province, Alexander; Banerjee, Arijit

doi:10.1109/tia.2020.3005887

Cited by 20 publications

(4 citation statements)

References 14 publications

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“…This rotor type was first developed and patented by Vagati [19,23,24] and is nowadays the reference rotor type for SynRMs. The DR figures in many proposed BDFRM designs [7,[25][26][27]. The ducted segmental rotor (DSR), which is receiving growing attention [18,22,[28][29][30][31][32], is closely related to the DR and is a combination of the SR and the DR.…”

Section: Radially Laminatedmentioning

confidence: 99%

“…This section will detail the derivation of Equation ( 8), based on Equations ( 5) and ( 6), for a an original MMF wave that is described by a cosine function as in Equation (7). First, the pulse function is rewritten as a complex Fourier series Equation (A5) and injected in the expression for the modulated MMF Equation (A6).…”

Section: Conflicts Of Interestmentioning

confidence: 99%

“…This makes these machine types attractive for variable speed applications such as pumps [2], wind power applications [3,4] and heating, ventilation and air conditioning (HVAC). Previous studies proposed the BDFRM in a variety of power ranges, from 45 kW to 320 kW for pumps and small wind turbines [5,6], up to 1.5-2 MW for larger wind turbines and even turbo-electric propulsion systems [3,7].…”

Section: Introduction 1literature Reviewmentioning

confidence: 99%

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On Analytical Modeling of the Air Gap Field Modulation in the Brushless Doubly Fed Reluctance Machine

et al. 2021

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The brushless doubly fed reluctance machine (BDFRM) is receiving an increased amount of attention from the research community thanks to its potential as an alternative drive for variable speed applications, both as motor and generator. Currently, the sizing of the BDFRM in the literature is based on the model of an ideal axially laminated rotor (ALR) and discrepancies are hidden in compensation factors which are in turn tuned with a finite element analysis (FEA). This paper proposes an analytical framework to accurately model the air gap field modulation, and by extension the torque density, of the BDFRM with ducted segmental rotor (DSR) and salient pole rotor (SPR). The results are verified with FEA and validated on a BDFRM prototype.

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Section: Radially Laminatedmentioning

confidence: 99%

Section: Conflicts Of Interestmentioning

confidence: 99%

Section: Introduction 1literature Reviewmentioning

confidence: 99%

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On Analytical Modeling of the Air Gap Field Modulation in the Brushless Doubly Fed Reluctance Machine

et al. 2021

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“…To adjust magnetic fields flexibly while maintaining high torque density, doubly-fed hybrid-excitation machines, which installs both PM materials and field control windings, have become popular [5], [6]. With the new technology, as compared with the pure PM-excited single-port counterparts, the fluxregulation capability of the doubly-fed hybrid-excited machines is relatively easier.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Brushless Doubly-Fed Dual-Stator Machines for Traction Applications

Zeng

Shen

Zhao

et al. 2023

IEEE Trans. Transp. Electrific.

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Two brushless doubly-fed dual-stator machines with different inner-stator field windings, namely AC and DC field windings, are proposed and investigated. It is shown the proposed machine with AC field windings exhibits advantages of higher torque density and wider flux-regulation range compared with its DC field winding counterpart. Unlike conventional doubly-fed hybrid-excited machines, the proposed machine consists of AC field windings and hence resulting in more flexible field current control. Its armature and field windings are separately placed in two stators, which can alleviate the space competition between the field and armature slots, as well as significantly enhance the space utilization. Consequently, both flux-regulation capability and torque density can be effectively improved. The topology, operating principle, and mathematical model of the proposed machines are introduced. Then, a sectored fluxweakening control method is proposed and elaborated. Based on finite element method (FEM), the main electromagnetic performances of the proposed machines are comprehensively evaluated. The FEM results manifest the proposed machine with AC field windings shows greatly improved flux-regulation range, higher torque, and output power under the proposed sectored flux-weakening method over the whole speed range. Finally, prototype machine of the proposed machine is fabricated, and experimental verifications are performed to validate the feasibility of the proposed machines.

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Performance Evaluation of Electrical Machines Based on General Airgap Field Modulation Theory

2022

General Airgap Field Modulation Theory for Electrical Machines

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An Approach to Maximize Torque Density in a Brushless Doubly Fed Reluctance Machine

Cited by 20 publications

References 14 publications

On Analytical Modeling of the Air Gap Field Modulation in the Brushless Doubly Fed Reluctance Machine

On Analytical Modeling of the Air Gap Field Modulation in the Brushless Doubly Fed Reluctance Machine

Investigation of Brushless Doubly-Fed Dual-Stator Machines for Traction Applications

Performance Evaluation of Electrical Machines Based on General Airgap Field Modulation Theory

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