Implementation of a PI phase angle controller for finite element analysis of the BDFM

Mathekga, Mmamolatelo E.; Shiyi, S.; Logan, Thomas; McMahon, R.A.

doi:10.1049/cp.2012.0293

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…The implementation of BDFM synchronous operation in FE is particularly challenging because the CW excitation voltage required to set a specific load condition cannot be predetermined as the machine is not stable in open loop. Therefore, a closed-loop controller was implemented with details described in [28]. The PW and CW voltage sources used in simulations only included the fundamental frequencies and did not contain time harmonics.…”

Section: Finite Element Analysis Of Bdfm Magnetic Fieldsmentioning

confidence: 99%

Vibration Analysis of Brushless Doubly Fed Machines in the Presence of Rotor Eccentricity

Abdi

Toshani

et al. 2020

IEEE Trans. Energy Convers.

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In this work, an analytical study has been performed on the Brushless Doubly Fed Machine's (BDFM) vibration due to the interaction of its fundamental magnetic fields, exerting bending forces in the back iron. The effects of rotor eccentricity on exacerbating the machine's vibration have been considered by assessing the stator back iron displacement function in the presence of rotor eccentricity. Finite element analysis is carried out for a 250 kW BDFM built in frame size D400 to validate the analytical methods. The stator back iron displacement is determined for an ideally-constructed machine as well as when the rotor has static and dynamic eccentricity. In addition, the prototype BDFM was tested at different operating conditions in order to examine its noise and vibration levels. A set of measurements was conducted to assess the main vibration component frequencies developed by the machine at different rotor speeds. It is shown that the main vibration components are created by bending setup in the back iron, rotor eccentricity, and the components with time and space harmonic natures. The results obtained from finite element analysis and experimentally agree with the analytical theory of BDFM vibration.

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Section: Finite Element Analysis Of Bdfm Magnetic Fieldsmentioning

confidence: 99%

Vibration Analysis of Brushless Doubly Fed Machines in the Presence of Rotor Eccentricity

Abdi

Toshani

et al. 2020

IEEE Trans. Energy Convers.

View full text Add to dashboard Cite

show abstract

“…The implementation of BDFIG synchronous operation in FE is particularly challenging because the CW excitation voltage required to set a specific load condition cannot be predetermined as the machine is not stable in open loop. Therefore, a closed‐loop controller was implemented with details described in [18].…”

Section: Fe Modelmentioning

confidence: 99%

Experimental and finite element studies of a 250 kW brushless doubly fed induction generator

Abdi

McMahon

2019

J. eng.

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“…This latter characteristic is shown for the case satisfying section III-C by comparing the negative and positive peak flux density values computed across similar locations on different stator teeth and stator core back sections using a time-stepping finite element model of a prototype frame size D180 BDFIM operating at a speed with f 2 = f 1 /2. The time-stepping finite element simulation was performed following the approach in [15] and the flux densities, B, in the teeth and core back section were computed using the following equation:…”

Section: A Stator Reference Frame Field Distribution Characteristicsmentioning

confidence: 99%

Brushless Doubly Fed Machine Magnetic Field Distribution Characteristics and Their Impact on the Analysis and Design

Mathekga

Ademi

McMahon

2019

IEEE Trans. Energy Convers.

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This paper contributes to the characterisation of the brushless doubly fed induction machine (BDFIM), which is attractive as a variable speed generator in applications (offshore wind turbine) with minimum maintenance requirements. The BDFIM has two three-phase stator windings of different pole numbers housed within the same stator slots and a shortcircuited rotor winding capable of coupling fields of different pole numbers. The stator windings and rotor winding create a magnetic field distribution with a range of characteristics different to those of conventional induction machines. This paper presents an analysis to identify the field characteristics and discusses their impact on the analysis and design of the BDFIM. The characteristics are determined from an analysis of the sum of two rotating sinusoidal field waveforms and confirmed by comparison with time-stepping finite element results and measured magnetic flux density data.Index Terms-Brushless doubly fed machine (BDFM), flux density, field distribution, rotor design, core loss, standing wave.

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Implementation of a PI phase angle controller for finite element analysis of the BDFM

Cited by 5 publications

References 2 publications

Vibration Analysis of Brushless Doubly Fed Machines in the Presence of Rotor Eccentricity

Vibration Analysis of Brushless Doubly Fed Machines in the Presence of Rotor Eccentricity

Experimental and finite element studies of a 250 kW brushless doubly fed induction generator

Brushless Doubly Fed Machine Magnetic Field Distribution Characteristics and Their Impact on the Analysis and Design

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