Patent ID: 6479971
Filing Date: 2002-11-12
Classification: H02P

Abstract:
A method for regulating, without a mechanical rotary transducer, a three-phase machine, which, functioning under any operational conditions, is supplied with D.C. power by an inverter through a D.C. link, the method comprising:detecting parameters of the D.C. link related to spatial magnetic conductivity fluctuations of the machine; monitoring an actual switching state of the inverter; and calculating at least one of (1) flux direction required for field-oriented control in asynchronous machines, and (2) the rotor position for rotor-oriented control in synchronous machines from the detected parameters of the D.C. link and the actual switching state of the inverter, wherein at least one of speed-dependent and load-dependent correction functions are carried out in a mathematical calculation defined by &ggr;(corrected)=&ggr;+&Dgr;&ggr;(speed, load).