Method for simulating the actual load angle of a polyphase machi

Details Method for simulating the actual load angle of a polyphase machi Method for simulating the actual load angle of a polyphase machi

1988-11-22

1991-03-19

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318800, H02P 540

Patent

active

050014110

ABSTRACT:
The invention relates to a method for simulating the actual load angle value (.nu.) of polyphase machine from the terminal voltages (u.sub.R, u.sub.S) and conductor currents i.sub.R, i.sub.S) of at least two phases (R, S) of the stator of a polyphase machine, each of which represents stator-oriented a-c variables, where said stator-oriented a-c variables (u.sub.R, u.sub.S, i.sub.R, i.sub.S) are transformed into a first stator current component (i.sub.1) and a second stator current component (i.sub.2) of the machine current vector (i.sup.s) and an absolute value of the machine flux vector (.vertline..phi..sup.s .vertline.), each of which are field-oriented d-c variables. According to the invention, a first corrected stator current component (i.sub.1) consisting of a stationary component (i.sub.1s) and a dynamic component (i.sub.1d) is generated where the stationary component (i.sub.1s) is determined form the absolute value of the machine flux vector (.vertline..phi..sup.s .vertline.) divided by the value of the main machine inductance (1.sub.H) and the dynamic component (i.sub. 1d) is equal to the high-frequency share of the first stator component (i.sub.1) and the actual load anglevalue (.nu.) is derived form the relation .nu.=tan.sup.-1 i.sub.2 /i.sub.1. Thus, the actual load angle value (.nu.) can be simulated over the entire control ragne of the polyphase machine without error.

REFERENCES:
patent: 4757248 (1988-07-01), Fujibka et al.

Affiliated with

Also associated with

Rating

Method for simulating the actual load angle of a polyphase machi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for simulating the actual load angle of a polyphase machi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for simulating the actual load angle of a polyphase machi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2012623