McDonnell Boehnen Hulbert & Berghoff LLP
Dynamic motor position determination
Methods and systems are provided for determining a position of a rotor in a motor at a particular time based on the non-uniform (imperfect) angular position of coils in the motor. In one example, a method may be implemented for light detection and ranging (LIDAR) applications. The method may involve rotating a rotor of a motor at a substantially constant angular velocity, receiving from Hall-effect sensors in the motor data representative of which coils in the plurality of coils are active during the substantially constant rotation of the rotor, correlating a reference angular position of the rotor, receiving subsequent data from the Hall-effect sensors indicating which coils are active at a particular time, correlating the particular time to a position of the rotor in the substantially constant rotation of the rotor, and determining an angular position of the rotor at the particular time.
Google Inc.
H
H02P
inventional
Gaetan Pierre-yves
Pennecot Droz