DISPLAY MODULE FOR AN INSTRUMENT PANEL WITH FLUID MOVEMENT
First Claim
1. A display module having a two-phase non-lubricated motor comprising:
- a rotor having N pairs of poles magnetised radially, in alternate directions, N being equal to 3 or 5;
a stator having at least two W-shaped circuits made from radial polar teeth extending inwards from a closed peripheral belt and having a coil on the central leg of the W, the W-shaped circuits being disposed so that, when the central tooth of one of the W-shaped circuits is situated facing a rotor magnetic transition, at least one central tooth of another W-shaped circuit is situated facing a rotor magnetic pole; and
at least one mechanical interaction between the rotor and the stator providing angular friction at a force that is substantially constant according to the relative speed of the rotor with respect to the stator, and with a value less than the torque produced by the electromagnetic interaction between the rotor and the stator.
2 Assignments
0 Petitions
Accused Products
Abstract
A display module has a two-phase motor which includes a rotor including N pairs of poles magnetised radially, in alternate directions, N being equal to 3 or 5, and a stator part including at least two W-shaped circuits made from radial pole teeth extending inwards from a peripheral closed belt and including a coil on a central leg of the W, said W-shaped circuits being arranged in such a way that when the central tooth of one of the W-shaped circuits is positioned facing a rotor magnetic transition, at least one central tooth of another W-shaped circuit is positioned facing a rotor magnetic pole. Said display module additional includes at least one specific mechanical interaction (between the rotor and the stator, comprising angular friction at a force that is substantially constant depending on the speed of the rotor relative to the stator, and at a value lower than the torque produced by the electromagnetic interaction between the rotor and the stator.
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Citations
11 Claims
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1. A display module having a two-phase non-lubricated motor comprising:
- a rotor having N pairs of poles magnetised radially, in alternate directions, N being equal to 3 or 5;
a stator having at least two W-shaped circuits made from radial polar teeth extending inwards from a closed peripheral belt and having a coil on the central leg of the W, the W-shaped circuits being disposed so that, when the central tooth of one of the W-shaped circuits is situated facing a rotor magnetic transition, at least one central tooth of another W-shaped circuit is situated facing a rotor magnetic pole; and at least one mechanical interaction between the rotor and the stator providing angular friction at a force that is substantially constant according to the relative speed of the rotor with respect to the stator, and with a value less than the torque produced by the electromagnetic interaction between the rotor and the stator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- a rotor having N pairs of poles magnetised radially, in alternate directions, N being equal to 3 or 5;
Specification