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Details of Grant 

EPSRC Reference: GR/M19741/01
Title: FINITE ELEMENT MODELLING OF PLUNGER TYPE ACTUATORS
Principal Investigator: Lai, Dr H
Other Investigators:
Researcher Co-Investigators:
Project Partners:
Department: Electronic and Electrical Engineering
Organisation: University of Bath
Scheme: Standard Research (Pre-FEC)
Starts: 01 August 1998 Ends: 31 July 1999 Value (£): 52,330
EPSRC Research Topic Classifications:
Electric Motor & Drive Systems
EPSRC Industrial Sector Classifications:
Electronics
Related Grants:
Panel History:  
Summary on Grant Application Form
Electromagnetic actuators producing linear stroke motion are commonly used in industrial and domestic applications. Examples include circuit breakers, linear actuators and fluid/gas valves. Although more elaborate constructions of the device are usually found in real life apparatus, in its simplest form, the device consists of an iron core, a source coil and a moving plunger which is set into motion when the coil is energised. Variations on this simple geometry include devices consisting of E cores which attract a small block of iron, as in many fuel injection value systems. All of these devices are characterised by a sliding action and an air gap which shrinks as the device closes.It is proposed to develop a new finite element technique which is capable of modelling these devices as they close, whilst connected to a dynamic load and supplied from a circuit. Typically these devices are magnetically non linear and time transient eddy currents flow in unlaminated parts. Finite element techniques for tracking the moving parts with moving meshes which will be capable of modelling the shrinking/expanding air gaps will be developed.
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Organisation Website: http://www.bath.ac.uk