Effect of rotor barrier pitch angle on torque ripple production in synchronous reluctance machines
- Muteba, Mbika, Twala, Bhekisipho, Nicolae, Dan-Valentin
- Authors: Muteba, Mbika , Twala, Bhekisipho , Nicolae, Dan-Valentin
- Date: 2016
- Subjects: Barrier pitch angle , Synchronous reluctance machines , Torque density
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/123832 , uj:20841 , Citation: Muteba, M., Twala, B & Nicolae, D.V. 2016. Effect of rotor barrier pitch angle on torque ripple production in synchronous reluctance machines.
- Description: Abstract: This paper analyses the effect of rotor barrier pitch angles on torque ripple production in Synchronous Reluctance Machines (SynRMs), with the objective to reduce torque ripple contents in medium size ground Electric Vehicles (EVs). While keeping major-design parameters constant, the barrier pitch angle is varied by a quarter of the stator slot pitch. Three SynRMs having different rotor barrier pitch angles are designed and modeled using 2D Finite Element Method (FEM). The specifications of a traditional 5.5 kW, three-phase, 50 Hz, induction machine are used to design and model the SynRMs. Torque ripple reduction of ± 48 % is achieved for barrier pitch angles of 15o and 17.5o mech, when the machines operate at current space phasor angle of 45o electric.
- Full Text:
- Authors: Muteba, Mbika , Twala, Bhekisipho , Nicolae, Dan-Valentin
- Date: 2016
- Subjects: Barrier pitch angle , Synchronous reluctance machines , Torque density
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/123832 , uj:20841 , Citation: Muteba, M., Twala, B & Nicolae, D.V. 2016. Effect of rotor barrier pitch angle on torque ripple production in synchronous reluctance machines.
- Description: Abstract: This paper analyses the effect of rotor barrier pitch angles on torque ripple production in Synchronous Reluctance Machines (SynRMs), with the objective to reduce torque ripple contents in medium size ground Electric Vehicles (EVs). While keeping major-design parameters constant, the barrier pitch angle is varied by a quarter of the stator slot pitch. Three SynRMs having different rotor barrier pitch angles are designed and modeled using 2D Finite Element Method (FEM). The specifications of a traditional 5.5 kW, three-phase, 50 Hz, induction machine are used to design and model the SynRMs. Torque ripple reduction of ± 48 % is achieved for barrier pitch angles of 15o and 17.5o mech, when the machines operate at current space phasor angle of 45o electric.
- Full Text:
Evaluation of rotor design parameters for minimising torque ripple on a synchronous reluctance machine using multifactor ANOVA
- Authors: Muteba, M. , Doorsamy, W.
- Date: 2017
- Subjects: Synchronous reluctance machines , Rotors - Design and construction , Analysis of variance , Finite element method
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/219393 , uj:21895 , Citation: Muteba, M. & Doorsamy, W. 2017. Evaluation of rotor design parameters for minimising torque ripple on a synchronous reluctance machine using multifactor ANOVA.
- Description: Abstract: This paper presents a method for evaluating, both qualitatively and quantitatively, the effects of specific rotor design parameters on the performance of a synchronous reluctance machine. The method uses multi-factor experimental design, with Analysis of Variance (ANOVA), and Finite Element Analysis (FEA) to determine the optimal rotor design parameter according to a specific objective. Using this method, two factors - rotor flux barrier pitch angle and barrier width - are selected at simultaneously varied levels for assessment with the aim of minimising the response variable, which is, the torque ripple. Results from the investigation show that the influence of the rotor flux barrier pitch angle on the torque ripple is more statistically significant than the influence of the barrier width. However, the effect of the barrier width on the actual torque is more significant.
- Full Text:
- Authors: Muteba, M. , Doorsamy, W.
- Date: 2017
- Subjects: Synchronous reluctance machines , Rotors - Design and construction , Analysis of variance , Finite element method
- Language: English
- Type: Conference proceedings
- Identifier: http://hdl.handle.net/10210/219393 , uj:21895 , Citation: Muteba, M. & Doorsamy, W. 2017. Evaluation of rotor design parameters for minimising torque ripple on a synchronous reluctance machine using multifactor ANOVA.
- Description: Abstract: This paper presents a method for evaluating, both qualitatively and quantitatively, the effects of specific rotor design parameters on the performance of a synchronous reluctance machine. The method uses multi-factor experimental design, with Analysis of Variance (ANOVA), and Finite Element Analysis (FEA) to determine the optimal rotor design parameter according to a specific objective. Using this method, two factors - rotor flux barrier pitch angle and barrier width - are selected at simultaneously varied levels for assessment with the aim of minimising the response variable, which is, the torque ripple. Results from the investigation show that the influence of the rotor flux barrier pitch angle on the torque ripple is more statistically significant than the influence of the barrier width. However, the effect of the barrier width on the actual torque is more significant.
- Full Text:
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