초록 ▼

A method is provided for regulating a three-phase machine functioning under any operational conditions without a mechanical rotary transducer. The machine is supplied with D.C. power by an inverter, where parameters of a D.C. link using an actual switching state of the inverter are detected for regu

A method is provided for regulating a three-phase machine functioning under any operational conditions without a mechanical rotary transducer. The machine is supplied with D.C. power by an inverter, where parameters of a D.C. link using an actual switching state of the inverter are detected for regulation. The method includes measuring (1) flow direction required for field-oriented control in asynchronous machines, and (2) rotor position for rotor-oriented control in synchronous machines. The measuring is performed by using spatial magnetic conductivity fluctuations in the machine. The conductivity fluctuations are detected using parameters for a D.C. link. An actual switching state of an inverter is used in the measuring process. Mathematical evaluation to calculate flow direction or rotor direction is then performed.

대표청구항 ▼

1. 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 cond

1. 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 .gamma.(corrected)=.gamma.+.DELTA..gamma.(speed, load).