Electromagnetic stepping motor with two coupled rotors
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United States of America Patent
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-
Jan 7, 1986
Grant Date -
N/A
app pub date -
Sep 11, 1984
filing date -
Sep 16, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The electromagnetic stepping motor of the invention comprises two rotors coupled to a common transmission wheel. The magnetic circuit of the stator is arranged so as to subject the respective rotors to fluxes of opposite senses .phi..sub.1, .phi..sub.2 when the winding is energized. The magnetization sense of the first rotor is opposite to the magnetization sense of the second rotor in a manner such that they turn in the same sense when subjected to said opposite sense fluxes. This arrangement permits either a diminution of the volume or a decrease in energy consumption of the motor and at the same time increases the security of running thereof in the presence of external magnetic fields. Such a motor is particularly adapted to small volume horological applications.
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