Patent ID: 9614426
Date: 2017-04-04
CPC Classifications: G01D,H02K

Claim:
1. A display module having a two-phase 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 a central leg of the W, the W-shaped circuits being disposed so that, when the central leg of one of the W-shaped circuits is situated facing a rotor magnetic transition, the central leg of another of the W-shaped circuits 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.