Design and testing of a 250 kW medium-speed brushless DFIG

Llano

et al. 2017

J. eng.

In this work, a large-scale Brushless Doubly Fed Machine (BDFM) built in frame size D400 is tested at different operating conditions in order to examine its noise and vibration levels. A series of measurements were conducted on the machine to establish the main modes of excitation of vibration and noise developed by the machine. The harmonic spectrums of the vibration amplitudes are presented at two different rotor speeds at which the vibration level is highest, in order to determine the vibration components frequencies existed in the vibration spectrum. A harmonic analysis of the BDFM is then proposed in order to assess the sources of vibration in the machine.

Section: Prototype Machine Considered In This Studymentioning

confidence: 99%

Experimental analysis of noise and vibration for large brushless doubly fed machines

Llano

et al. 2017

J. eng.

“…A 250kW has been designed and tested in [113]. The B-DFIG eliminates the need of brushes and slip rings.…”

Section: ) Magnetic Stator Wedgesmentioning

confidence: 99%

A Review of Methods to Increase the Availability of Wind Turbine Generator Systems

Shipurkar¹,

Polinder²,

Ferreira³

2016

CPSS TPEA

Abstract-Availability is an important factor to be considered when designing wind turbine generator systems. The quest for increased availability is based on the following five design approaches -design for component reliability, active control for reliability, design for fault tolerance, prognostics, and design for maintainability. This paper reviews methods focussing on the first three, i.e. component reliability, active control, and fault tolerance. The paper further identifies some promising directions for further research.

“…Both stator windings were connected in delta. The rotor comprises six sets of nests each consisting of a number of concentric loops [19], the conductors being solid bars with one common end ring [20]. The magnetic properties for the iron were provided by the machine manufacturer.…”

Section: Prototype Machine Considered In This Studymentioning

confidence: 99%

“…Using (20) and from the frequency of the current harmonics in a stator coil, the possible combinations of f i r and p j r can be obtained.…”

Section: Undesirable Time Harmonics In Stator Windings Due To Rotomentioning

confidence: 99%

See 1 more Smart Citation

A Study of Unbalanced Magnetic Pull in Brushless Doubly Fed Machines

IEEE Trans. Energy Convers.

McMahon

2015

This paper studies the unbalanced magnetic pull in the brushless doubly fed machine (BDFM) caused by both static and dynamic rotor eccentricities. Several parallel winding designs for the two stator windings are proposed, and the practicality of such designs is discussed with respect to direct coupling between the stator windings and with rotor undesirable harmonic fields. Once practical parallel winding designs are established, their effects on reducing deflection as a result of static and dynamic eccentricities are shown and compared with series wound stator. This study has been carried out on a prototype D400 250-kW BDFM. Index Terms-Brushless doubly fed machine (BDFM), finiteelement (FE) analysis, parallel winding, rotor eccentricity, unbalanced magnetic pull (UMP). 0885-8969