Microsoft Corporation
Stepper motor for use in rotary control assembly of input device

Abstract:

Embodiments of the subject matter described herein relates to a stepper motor for use in a rotary control assembly of an input device. The stepper motor includes a shaft; a magnet coupled to the shaft and operable to rotate with a rotation of the shaft, the magnet generating a first magnetic field; a first coil arranged on a rotational path of the magnet; and a first current source configured to supply a first current to the first coil to cause the first coil to generate a second magnetic field, a main direction of the second magnetic field being substantially parallel with a main direction of the first magnetic field while the magnet rotates and passes the first coil.