Characterising lifecycle behaviour of permanent magnets is critical to emergent electrical machine applications

Permanent magnet materials are now being used in many designs of new electrical machine applications, and a lot of this equipment will be expected to have long lifecycles. If performance and lifecycle targets are to be met, then detailed characterisation at the design stage using advanced electromagnetic and multiphysics simulation technology will be critical, according to Cobham Technical Services.

High field strength, rare earth permanent magnets are key components in many of the new electrical machine designs now appearing on the market. Typical long-life applications for such technology include wave and wind power generators, and the traction motors for hybrid and electric vehicles.

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Negative Sequence Losses in Turbine Generator Rotors

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.

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Simulation accuracy helps pioneering Superconducting Generator developments

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” »

Webinar: Software requirements and practical limitations of multi-physics and multi-discipline simulations for electrical machines

Electromagnetic designers of electrical motors and generators in industrial organizations are increasingly examining the behaviour of the machine in multi-physics and multi-discipline scenarios.

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Cobham Technical Services and Boulder Wind Power collaborate to accelerate development of revolutionary wind turbine technology

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.

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Webinar: Multiphysics Simulation in Opera

Cobham Technical Services – Vector Fields Software and its product Opera have been at the forefront of finite element electromagnetic analysis for more than twenty-five years.

Opera is a general-purpose finite element software suite for the design and optimization of electromagnetic devices in two or three space dimensions. The software has been in continuous development since 1984, and its accuracy and capabilities for multiphysics analysis has made it a firm favourite in both scientific and industrial communities. The ability to couple electromagnetic analysis to built-in thermal and stress solutions, along with drive circuits, mechanical drives and system representations allows in-depth analysis. Remove assumptions and bottlenecks from your design process and deliver right-first-time products.

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Determination of parameters of a synchronous motor with radial permanent magnets and rotor damper bar cage

Abstract – The paper describes the determination of the parameters of a permanent magnet synchronous motor with radial magnets (RPMSM) as functions of power supply conditions and load. The description presents analysis of some steady state and transient performances together with limitations.

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Simulating the Toyota Prius electric motor

This application note shows how to create and analyze the 2004 version of the Toyota PRIUS electric motor using the 2D Machine Environment (ME2D). The experimental characterization of the motor and of the drive system has been done by the Oak Ridge National Laboratory (ORNL) which presented its findings in a series of papers [1]-[5].

The steps needed to customize the geometry of the stator and rotor of the default embedded magnet synchronous model in order to recreate the precise geometry of the PRIUS motor are detailed.

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Webinar: Introduction to Rotating Electrical Machine Design using Opera

Webinar: Introduction to Rotating Electrical Machine Design using Opera

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.

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Introduction to synchronous machine design

Introduction to ME2D – Synchronous Machine Finite Element Model Construction & Analysis

Introductory video showing the use of the two dimensional machines environment (ME2D) with Opera-2d in building, simulating and post-processing a parametric model of a synchronous machine.

The environments provide ready-made generic designs, together with application-specific data entry and advanced optimization techniques, all expressed in the language of the application.

The environments provide a strategic framework for the design, analysis and optimization of your electrical products.

The advanced facilities can boost the productivity of your engineers and get your design to market with reduced time and cost.

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