This application note presents the modelling and analysis of an axisymmetric linear motor using Opera-2D. The chosen design is a four-phase tubular Switched Reluctance Motor (SRM), designed and characterized in
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.
Vector Fields, a part of Cobham plc, has extended the accuracy of its Opera electromagnetic simulator for electrical machinery applications with a new finite-element hysteresis solver for soft magnetic materials. Believed to be unique, the new Hysteresis Solver provides designers of motors, generators and other electrical machinery with an accurate means of accounting for losses and predicting performance changes due to hysteresis effects in the specialty electrical steels that are increasingly being used to enhance machine efficiency.
B&W makes some of the world’s highest-fidelity loudspeakers, and as global competition increases, the company sees an increasing role for electromagnetic simulation to improve design characteristics and shorten design cycles.
B&W targets the very high end of the audio reproduction market, and has a track history of innovation. Its speakers are widely used in recording studios, and it also serves the consumer market with innovations such as hi-fi speakers for MP3 players, and flat hi-fi speakers to go with plasma TVs.
Abstract – This paper presents the finite element modelling of a novel tubular linear generator, designed for efficient wave energy conversion. The paper presents generator design considerations to meet the demands of the intended application. In addition, the paper concentrates on novel aspects of generator modelling using electromagnetic finite element analysis, which were adopted to fully characterise the generator performance at the development stage, hence alleviating the need for prototyping, the cost of which was unacceptable for this application.
Abstract – This paper describes how state-of-the-art Finite Element Analysis (FEA) programs can be used to characterise the dynamic performance of linear electrical machines and actuators. Special emphasis is placed on the use of an advanced scripting language for the characterisation of the mechanical load coupled to the drive, as well as the electronic system driving the device. Aspects of modelling of a reciprocating linear actuator and a linear 3-phase switched reluctance machine are discussed.