A circuit and method for controlling a rotating machine (11) in the constant horsepower range above base speed uses an inverter (15) having SCR's (T1-T6) connected in series with the primary commutation switches (Q1-Q6) to control turn off of the primary commutation switches and to protect the primary...http://www.google.es/patents/US6236179?utm_source=gb-gplus-sharePatente US6236179 - Constant power speed range extension of surface mounted PM motors
Constant power speed range extension of surface mounted PM motors
