Failure Modes of Brushless Excitation System and Refurbishment Approach for Life Extension

2021 ◽  
Author(s):  
P. G. S. Kumar ◽  
Reddy K Malla
Keyword(s):  
Failure Modes ◽  
Life Extension ◽  
Excitation System ◽  
Brushless Excitation

Design of a brushless excitation system utilizing pot cores

2015 ◽  
Vol 34 (6) ◽  
pp. 1740-1757
Author(s):  
Julian Veitengruber ◽  
Frank Rinderknecht ◽  
Horst E. Friedrich
Keyword(s):  
Design Methodology ◽  
Measured Data ◽  
Prototype System ◽  
Transfer System ◽  
Excitation System ◽  
Inductive Power Transfer ◽  
Content Type ◽  
Slip Rings ◽  
Brushless Excitation ◽  
System Compensation

Purpose – The purpose of this paper is to devote the optimal substitution of slip rings through an inductive power transfer system for field winding supply of generators or motors with a wound rotor. By a rotational pot-core transformer approach, the rotor-side energizing of the excitation windings can be provided isolated and free of wear. Design/methodology/approach – For design purpose, an analytical model of the inductive link and the compensation network elements is shown. Based on a pot-core transformer approach, possible types of compensation networks regarding motor-specific constraints were carried out and compared among themselves by parameter studies. The analytical parts of the model were subsequently validated with measured data of an appropriate core and accompanying FEM calculations. On the basis of an experimental prototype system, the approach has been tested both stationary and transient. Findings – The publication exemplifies how a brushless excitation system for generators and motors can be inexpensively designed and implemented. Originality/value – This paper systematically presents a comprehensive analytical approach for brushless excitation systems as well as a prototypical system. Compensation network elements regarding motor-specific constraints were carried out and compared among themselves by parameter studies.

Fully Superconducting AC Generator with Brushless Excitation System

1990 ◽  
pp. 568-573 ◽  
Author(s):  
I. Muta ◽  
H. Tsukiji ◽  
Y. Tsutsui ◽  
T. Hoshino ◽  
E. Mukai ◽  
...  
Keyword(s):  
Excitation System ◽  
Brushless Excitation

Integrity Management and Life Extension for a CALM Buoy Oil Export Terminal

2016 ◽  
Author(s):  
Robert B. Gordon ◽  
Juan Carlos Ruiz-Rico ◽  
Michiel Peter Hein Brongers ◽  
Julian Gomez
Keyword(s):  
Failure Modes ◽  
State Of The Art ◽  
Life Extension ◽  
Remaining Life ◽  
Integrity Assessment ◽  
Design Life ◽  
Oil Export ◽  
Integrity Management ◽  
Inspection And Maintenance ◽  
Future Risk

This paper applies state-of-the-art integrity management and life extension methodologies to address degradation and failure modes specific to CALM buoy export terminals. The main objectives are to (1) classify the components of the export terminal according to their criticality, (2) establish risk-based inspection and maintenance plans to reduce or mitigate risk to acceptable levels and (3) assess remaining life. The method is applied to a CALM buoy operating off the coast of Colombia. This buoy serves as the oil export terminal for all crude oil transmitted by the Ocensa pipeline, which has a capacity of 560 kBPD or around 60% of total Colombia oil production. The buoy is nearing the end of its design life, and options for life extension have been investigated based on an integrity assessment of the current condition of the equipment. As part of the assessment, detailed plans for future Risk Based Inspections (RBI) and Mitigation, Intervention, and Repair (MIR) have been developed.

Field Tests and Simulation of a High Initial Response Brushless Excitation System

1986 ◽  
Vol PER-6 (3) ◽  
pp. 26-27
Author(s):  
C. A. Stigers ◽  
J. D. Hurley ◽  
D. I. Gorden ◽  
D. M. Callanan
Keyword(s):  
Field Tests ◽  
Initial Response ◽  
Excitation System ◽  
Brushless Excitation
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