Electricity: motive power systems – Positional servo systems – With stabilizing features
Patent
1995-10-25
1997-03-11
Ro, Bentsu
Electricity: motive power systems
Positional servo systems
With stabilizing features
318139, 318448, 318807, H02P 5408
Patent
active
056104901
ABSTRACT:
A torque shudder protection device for an induction machine includes a flux command generator for supplying a steady state flux command and a torque shudder detector for supplying a status including a negative status to indicate a lack of torque shudder and a positive status to indicate a presence of torque shudder. A flux adapter uses the steady state flux command and the status to supply a present flux command identical to the steady state flux command for a negative status and different from the steady state flux command for a positive status. A limiter can receive the present flux command, prevent the present flux command from exceeding a predetermined maximum flux command magnitude, and supply the present flux command to a field oriented controller. After determining a critical electrical excitation frequency at which a torque shudder occurs for the induction machine, a flux adjuster can monitor the electrical excitation frequency of the induction machine and adjust a flux command to prevent the monitored electrical excitation frequency from reaching the critical electrical excitation frequency.
REFERENCES:
patent: 4633982 (1987-01-01), Swigert
patent: 4963804 (1990-10-01), Geiger
patent: 4968925 (1990-11-01), De Doncker
patent: 5144216 (1992-09-01), De Doncker
patent: 5166593 (1992-11-01), De Doncker et al.
patent: 5301522 (1994-04-01), Ikemizu et al.
patent: 5469820 (1995-11-01), Data et al.
patent: 5534764 (1996-07-01), Masaki et al.
De Doncker Rik W. A. A.
King Robert D.
Szczesny Paul M.
Agosti Ann M.
General Electric Company
Ro Bentsu
Snyder Marvin
LandOfFree
Torque shudder protection device and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Torque shudder protection device and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Torque shudder protection device and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-445895