Self guided linear induction motor system and method
AssigneeSwisspod Technologies SA
InventorsJaime Renedo Anglada, Dario Bueno-Baques
Life of this patent
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Abstract
A polyphase linear induction motor including a movable primary member (100), the primary member (100) including a magnetic material (110), a polyphase winding (120) arranged around the magnetic material, and a stationary longitudinally extending secondary member (150) separated from the primary member (100) by a gap, the secondary member (150) including an electrically-conductive reaction plate (200) and a backing magnetic material (300), wherein the secondary member includes a middle section (205) and two outer sections (210.1, 210.2), the middle section (205) and the two outer sections (210.1, 210.2) arranged next to each other in parallel to an axis of longitudinal extension of the reaction plate (200).
Claims16
A polyphase linear induction motor comprising:
- a movable primary member (100), the primary member (100) including a magnetic material (110), a polyphase winding (120) arranged around the magnetic material;
- and
- a stationary longitudinally-extending secondary member (150) separated from the primary member (100) by a controlled gap, the secondary member (150) including an electrically-conductive reaction plate (200) and a backing magnetic material (300),
- wherein the electrically-conductive reaction plate (200) includes a middle section (205) and two outer sections (210.1, 210.2) having an increased electric conductivity as compared to an electric conductivity of the middle section (205) wherein at least one winding of the polyphase winding (120) of the movable primary member (100) includes windings arranged to support the operation of the primary member in a trapezoidal shape.
A polyphase linear induction motor comprising:
- a movable primary member (100), the primary member (100) including a magnetic material (110), a polyphase winding (120) arranged around the magnetic material;
- and
- a stationary longitudinally-extending secondary member (150) separated from the primary member (100) by a gap, the secondary member (150) including variable stacked electrically-conductive layers to form a reaction plate (200), wherein the electrical conductivity of the layers may differ from layer to layer, and a backing magnetic material (300).
A method of modulating a plurality of power converters, each power converter connected to a winding or a set of windings of a polyphase winding (120) within a movable primary member (100) of a linear induction motor (M), the method including the steps of:
- generating a moving magnetic field with the plurality of power converters (610, 620, 630) having one or more poles and a plurality of phases, and
- changing a pole pitch between the poles of the moving magnetic field as a function of a speed of the primary member (100) of the linear induction motor (M), wherein the pole pitch is increased with an increased speed of the movable primary member (100).
Dependencies are inferred from the claim text.