Cost-Effective Single-Inverter-Controlled Brushless Technique for Wound Rotor Synchronous Machines

Bukhari, Syed Sabir Hussain; Sirewal, Ghulam Jawad; Madanzadeh, Sadjad; Ro, Jong‐Suk

doi:10.1109/access.2020.3037116

Cited by 5 publications

(7 citation statements)

References 19 publications

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“…Researchers have made various efforts to develop simpler, cost-effective, and more convenient excitation methods for the rotor field of WRSMs as compared to the traditional field excitation techniques which involve brushes, sliprings, exciters, and pilot exciters regardless of the power rating of the machine [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Brushless Wound Rotor Synchronous Machine Based on a Consequent-Pole Rotor Structure with Better Torque Attributes

Bukhari

Shah

et al. 2022

International Transactions on Electrical Energy Systems

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This paper presents a subharmonic-based brushless wound rotor synchronous machine (BL-WRSM) topology with permanent magnet-assisted (PMA) and consequent-pole (CP) rotor structures to achieve better torque characteristics as compared to the conventional subharmonic-based brushless WRSM. The proposed topologies use the conventional high-efficient subharmonic field excitation technique to achieve a brushless operation and a lower volume of permanent magnet (PM) to achieve better average, starting, maximum, and minimum torques and lower torque ripple. A four-pole, twenty-four-slot (4-pole/24-slot) machine with conventional, PM-assisted (PMA), and consequent-pole (CP) rotor structures are developed in a JMAG-Designer 20.1 environment to carry out two-dimensional finite element analysis (2D-FEA). The developed machines are used to validate the operation and achieve electromagnetic and electromechanical performances of the proposed subharmonic-based BL-WRSM topologies with better torque attributes.

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Section: Introductionmentioning

confidence: 99%

Brushless Wound Rotor Synchronous Machine Based on a Consequent-Pole Rotor Structure with Better Torque Attributes

Bukhari

Shah

et al. 2022

International Transactions on Electrical Energy Systems

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“…Permanent magnet (PM) machines except for those using ferrite magnets are not a preferred choice for the electrical machine manufacturing industry, especially when considering the low-power density applications [1]. The cost of rare-earth materials has recently hit new highs [2]- [3]. This motivated researchers to explore other options that require no magnets.…”

Section: Introductionmentioning

confidence: 99%

Simplified Brushless Wound Field Synchronous Machine Topology Based on a Three-Phase Rectifier

et al. 2021

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“…In [12][13][14][15][16], higher harmonics were generated in the airgap through input armature currents. These higher harmonics were utilized to produce a harmonic current in the harmonic winding which was later rectified to provide DC to the field winding of the rotor to attain brushless and exciter-less operation for WRSMs.…”

Section: Introductionmentioning

confidence: 99%

“…The generated MMF is utilized to produce a harmonic current of the harmonic winding. In [16], a BL-WRSM topology built on the principle of injecting a distinctive current shape for the armature winding was proposed. This unique current shape is comprised of the fundamental and 3rd-harmonic current components.…”

Section: Introductionmentioning

confidence: 99%

High-Efficient Brushless Wound Rotor Synchronous Machine Topology Based on Sub-Harmonic Field-Excitation Technique

et al. 2021

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This paper presents a new high-efficient three-phase brushless wound rotor synchronous machine (BL-WRSM) based on a sub-harmonic field excitation technique. In the proposed machine topology, the stator is equipped with two different three-phase windings: (1) main armature winding, and (2) additional armature winding. The main armature winding is based on a 4-pole winding configuration, whereas the additional armature winding is based on a 2-pole winding configuration. Both windings are supplied current from two different inverters, i.e., inverter-1, inverter-2, and simultaneously. Inverter-1 provides the regular input current to the main armature winding, whereas inverter-2 provides a three-phase current of low magnitude to the 2-pole additional armature winding. This generates an additional sub-harmonic component of MMF in the airgap beside the fundamental MMF. On the other side, the rotor is equipped with (1) harmonic, and (2) field windings. These windings are electrically coupled via a rectifier. The fundamental component of MMF produces the main rotating magnetic field, whereas the sub-harmonic MMF gets induced in the harmonic winding to produce harmonic current. This current is rectified to give DC to the rotor field winding to attain brushless operation. To authenticate the operation and analyze its performance, the proposed BL-WRSM topology is supported using 2-D finite element analysis (FEA) in JMAG-Designer. Later on, the performance of the proposed brushless topology is compared with the customary BL-WRSM topology to verify its high efficiency, high output torque, low torque ripple, and low unbalanced radial force on the rotor.

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Cost-Effective Single-Inverter-Controlled Brushless Technique for Wound Rotor Synchronous Machines

Cited by 5 publications

References 19 publications

Brushless Wound Rotor Synchronous Machine Based on a Consequent-Pole Rotor Structure with Better Torque Attributes

Brushless Wound Rotor Synchronous Machine Based on a Consequent-Pole Rotor Structure with Better Torque Attributes

Simplified Brushless Wound Field Synchronous Machine Topology Based on a Three-Phase Rectifier

High-Efficient Brushless Wound Rotor Synchronous Machine Topology Based on Sub-Harmonic Field-Excitation Technique

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