Position sensing for rotor in hybrid stepper motor

Details Position sensing for rotor in hybrid stepper motor Position sensing for rotor in hybrid stepper motor

2011-03-22

2011-03-22

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

C318S696000, C318S648000, C318S649000

Reexamination Certificate

active

07911174

ABSTRACT:
A method and system are provided for sensing the position of a rotor in a hybrid stepper motor. First and second Hall sensors are positioned in a spaced-apart relationship with the first and second armatures of the rotor such that the first and second Hall sensors generate electrical outputs that are 90° out of phase with one another as the rotor rotates. The electrical outputs are adjusted relative to a reference, and the amplitude of the electrical outputs is further adjusted to account for spacing differences between the rotor and each of the first and second Hall sensors.

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