Methods and apparatuses for estimating transient slip

Details Methods and apparatuses for estimating transient slip Methods and apparatuses for estimating transient slip

2008-11-11

2011-10-11

Ip, Paul (Department: 2837)

Electricity: motive power systems

Plural, diverse or diversely controlled electric motors

Plural, diverse motor controls for different motors

C318S254100, C318S713000, C318S727000, C318S729000

Reexamination Certificate

active

08035322

ABSTRACT:
A method of determining a slip estimate associated with an induction motor through analysis of voltage and current signals. A fundamental frequency is calculated from a representation (e.g., complex representation) of the voltage signal, and a saliency frequency is calculated from a representation of the current signal. An estimation of slip quantity is calculated according to a slip estimation function that includes the saliency frequency, a saliency order, the fundamental frequency, a quantity of rotor slots, and a quantity of poles of the motor.

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