Electricity: motive power systems – Positional servo systems – 'reset' systems
Reexamination Certificate
2006-07-18
2009-02-24
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Positional servo systems
'reset' systems
C318S700000, C388S911000
Reexamination Certificate
active
07495408
ABSTRACT:
A method for the no-transmitter speed determination of an asynchronous machine, comprising the steps which follow: a module for field-oriented regulation calculates the voltages to be applied to the asynchronous machine on the basis of a setpoint for the speed, at least two values measured for the conductor current, and a speed calculated by an observer module, the observer module has applied thereto the voltage values obtained from the field-oriented regulation or the voltage values measured, and calculates a value of the moment-forming current îsq(t) and an inner moment Mi(t) of the asynchronous machine from the values applied, a moment module calculates a load moment Ml(t) acting upon the asynchronous machine from the difference of the moment-forming currents from the field-oriented regulation and the observer module, a speed module calculates the actual speed of the asynchronous machine via the load moment of the moment module and the inner moment of the observer module.
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Aleyt Christian
Hansen Nils-Peter
Hormann Frank
Hunte Torsten
Jungheinrich Aktiengesellschaft
Luo David S
Ro Bentsu
Vidas Arrett & Steinkraus P.A.
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