Abstract – Negative sequence currents are induced in the rotor of a turbine generator when there is imbalance in the three phase armature currents. By adopting surface impedance boundary conditions to represent the rotor steel, three dimensional finite element methods can be used to determine the effect of barriers to the current flow caused by transverse balancing slits and gaps between slot wedges or dampers, with realistic computational resources.
Factory testing of a pioneering superconducting generator for hydroelectric applications from GE Power Conversion business has demonstrated a high correlation between the accuracy of the Opera electromagnetic simulation tool used during the design process, and the performance of the finished product. The proven fidelity of the simulation, for such a complex electrical machine with 28 poles, could help GE to create advanced solutions for numerous emergent superconducting applications in markets such as wind, wave and hydroelectric power generation, and electric motors for ship propulsion. Continue reading “Simulation accuracy helps pioneering Superconducting Generator developments” »
Radical new design aims to deliver a 20% reduction in the cost of wind generated electricity
Cobham Technical Services is helping Colorado-based Boulder Wind Power (BWP) accelerate development of a radical new permanent magnet generator through use of advanced electromagnetic design software. Based on a permanent magnet, direct drive design, BWP’s generator uses a unique axial flux, air-core architecture that increases efficiency and reliability, and will ultimately reduce the cost of wind generated electricity to compete at parity with fossil fuels.
Today’s designers of rotating electrical machines are being pressured to deliver more efficient, robust and innovative motors and generators in ever-shortening timescales. In this webinar Cobham Technical Services – Vector Fields Software will show how the Opera Suite can be used to deliver the accuracy of Finite Element Analysis (FEA) with the ease-of-use of analytical design packages.
Optimal design solutions to rotating electrical machine requirements can now be created in hours, by non specialists, using a new version of design automation software from Cobham Technical Services.
Cobham’s Machines Environment introduced a new level of user friendliness when it was launched by providing a design entry system that allows precision finite-element analysis (FEA) models of motors and generators to be created and solved in minutes. The two-dimensional (2D) version of the software has now been integrated with Cobham’s unique optimization tool which automatically finds the optimal solution within a design space – even for multiple or competing design objectives.
Making Rare Earth Magnets Rarer
Dr Charles Pollock and Dr Helen Pollock; Techneleck Ltd.
* ability to run 1000s of optimisation searches helps Siemens make breakthroughs such as permanent magnet generators.
Cobham Technical Services has been awarded a contract for its powerful Opera electromagnetic design tool by Siemens Wind Power, a leading supplier of wind turbines for onshore, offshore and coastal sites.
A major new release of the well-known Opera electromagnetic design software greatly improves the speed and accuracy of simulation by extending the flexibility of finite element analysis meshing. The software also includes numerous further enhancements, including an integrated graphical circuit editor for defining associated electrical circuitry such as motor drive components.
From PEMD 2010, Dr Neil Brown FIET, Chief Engineer Research and Technology, Alex Michaelides, Cobham Technical Services presents CYBERGEN: MODELLING THE DESIGN CHALLENGES FOR SMALL EMBEDDED SYNCHRONOUS GENERATORS CONNECTED TO INCREASINGLY UNSTABLE NETWORKS
Cobham Technical Services is launching a 3D version of its rapid electromagnetic design tool for rotating electrical machines – the Advanced Machines Environment. The new software combines the extreme accuracy of finite-element analysis (FEA) simulation with a design entry system that creates full 3D models of electric motors or generators within minutes.