Rotary electric machines providing pole-changing by pole-amplitude modulation

Claim 1

A ROTARY ELECTRIC MACHINE HAVING A THREE-PHASE WINDING COMPRISING CONSECUTIVE COILS FORMING COIL-GROUPS OF CONSECUTIVE PHASES EACH COIL-GROUP COMPRISING ONE OR MORE COILS, SAID THREE-PHASE WINDING HAVING FIRST CURRENTSUPPLY CONNECTIONS PROVIDING A FIRST NUMBER OF POLES DEFINED BY THE NUMBER OF SAID COIL-GROUPS IN EACH PHASE, SAID THREE-PHASE WINDING HAVING SECOND CURRENT-SUPPLY CNNECTIONS ALTERNATIVE TO SAID FIRST CONNECTIONS DEFINING A POLE-AMPLITUDE MODULATION WAVE APPLIED TO THE THREEPHASE WINDING, SAID POLE-AMPLITUDE MODULATION WAVE HAVING AN EVEN MULTIPLE OF THREE CONSECUTIVE POSITIVE AND NEGATIVE WAVE HALF-CYCLES, EACH HALF-CYCLE INCLUDING A NUMBER OF CONSECUTIVE COILS, THE NEGATIVE HALF-CYCLES BEING CHARACTERIZED BY REVERSAL OF SENSE OF CURRENT FLOW IN THE COILS OF SAID NEGATIVE HALF-CYCLES RELATIVE TO THE SENSE OF CURRENT FLOW THEREIN WITH SAID FIRST CURRENT-SUPPLY CONNECTIONS, SAID POLE-AMPLITUDE MODULATION WAVE PROVIDING A SECOND NUMBER OF POLES ALTERNATIVE TO SAID FIRST POLENUMBER, SAID SECOND POLE-NUMBER BEING DEFINED AS THE NUMERICAL DIFFERENCE BETWEEN THE FIRST POLE-NUMBER AND THE NUMBER OF SAID HALF-CYCLES OF SAID POLE-AMPLITUDE MODULATION WAVE AND THE RATIO OF SAID FIRST AND SECOND POLE-NUMBERS BEING OTHER THAN 2:1, SAID COILS OF SAID THREE-PHASE WINDING BEING CHORDED TO AN EVEN NUMBER, SAID POLE-PITCHES CORRESPONDING TO A THIRD POLE-NUMBER, SAID THIRD POLE-NUMBER BEING DEFINED AS THE NUMERICAL SUM OF SAID FIRST POLE-NUMBER AND THE NUMBER OF HALF-CYCLES OF SAID POLE-AMPLITUDE MODULATION WAVE.