Stepping motor to drive a body, especially a shaft, through small angles of rotation per step
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United States of America Patent
Stats
-
Nov 23, 1993
Grant Date -
N/A
app pub date -
Jun 16, 1992
filing date -
Dec 16, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A stepping motor for rotating a body through small angles of rotation, the stepping motor having a stator and a rotor, an actively moveable connection unit for selectively connecting each of the stator and rotor to the body, and a drive which can be triggered and acts on the rotor. For performing an individual rotational step, the triggering of the drive and the connecting of the rotor with the body are essentially effected during a given period of time, and each time after performing a rotational step, triggering of the connection of the stator with the body takes place in order to maintain the body in the particular position attained. The stepping motor further includes at least one spring element which acts counter to the rotation of the rotor and stator in relation to each other and is provided between the rotor and the stator, and two rings disposed coaxially to each other and to the body, one of the rings being fixedly connected with the stator and the other of the rings forming part of the rotor, and the spring element being connected between the rings.
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