Patent ID: 9667122
Date: 2017-05-30
CPC Classifications: H02K,H02P

Claim:
1. A brushless D.C. motor comprising: a rotor with a surface provided with a plurality of permanent rotor magnets distributed therealong, each rotor magnet having an RF transmitter attached thereto containing a unique identification character serving to identify the rotor magnet; a stator having a plurality of pole teeth separated by axially extending slots, each one of the pole teeth having a power coil wound thereabout; a plurality of RF receiving antennae each mounted adjacent a different one of said pole teeth for receiving r.f. signals broadcast from an RF transmitter containing the unique identification character when a given one of the RF transmitters is within the reception range of a given one of the receiving antennae, the unique identification signal serving to identify the particular one of the rotor magnets entering said reception range; and, a transmitter power generator unit comprising at least one electrically conductive coil mounted on said rotor for rotation therewith, and a transmitter power conditioning unit having an input coupled to the at least one coil and an output coupled to each of the RF transmitters for supplying electrical power thereto, said at least one coil being positioned on the rotor to cut through magnetic lines of force generated by the stator power coils to induce electrical current in the at least one coil.