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US 7,247,957 B2Granted
Electromechanical transducer linear compressor and radio transmission antenna
AssigneeIsis Innovation Limited
InventorMichael William Dadd
Life of this patent
Estimating the term…
Abstract
An electromagnetic transducer which may be driven as a linear electric motor (which may be a permanent magnet motor or a variable reluctance motor) in which coils disposed around first and second cores are positioned on opposite sides of a longitudinal plane in which the longitudinal axis of the armature lies. The transducer may be arranged to work as a generator.
Claims32
An electromechanical transducer comprising:
- a first core providing a first flux path and defining a first air gap;
- at least one first stationary coil disposed around a portion of said first core;
- a second core providing a second flux path and defining a second air gap;
- at least one second stationary coil disposed around a portion of said second core;
- and
- a first armature arranged for linear motion along a longitudinal axis through said first and second air gaps;
- and
- wherein
- said first and second air gaps are positioned adjacent one another in spaced apart relationship along said longitudinal axis such that said longitudinal axis passes through said first and second air gaps;
- said first and second coils at least partly overlap in the direction of said longitudinal axis;
- said at least one first stationary coil and said at least one second stationary coil are positioned on opposite sides of a longitudinal plane in which said longitudinal axis lies;
- and
- said first and second cores are positioned such that said first and second flux paths are substantially on opposite sides of said longitudinal plane.
10 more elements
Dependencies are inferred from the claim text.