Patent ID: 11894795
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A process of operating an electric motor, comprising:
alternately applying first and second three-phase vectors to move a rotor of the electric motor from a first position, the first three-phase vector being a first angular degree from the first position of the rotor and the second three-phase vector being a second angular degree from the first position of the rotor;
delivering a current in a driving phase of the electric motor;
comparing mutual inductances resulting from application of the first and second three-phase vectors as the rotor moves from the first position; and
detecting a zero-crossing (ZC) location in back-electromotive force (BEMF) of the electric motor based on the comparing of the mutual inductances of the first and second three-phase vectors.