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Title: Torque shudder protection device and method

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.

Inventors:
 [1];  [2];  [3]
  1. Schenectady, NY
  2. (Malvern, PA)
  3. Ballston Lake, NY
Issue Date:
Research Org.:
Ford Motor Co
OSTI Identifier:
870861
Patent Number(s):
5610490
Assignee:
General Electric Company (Schenectady, NY)
DOE Contract Number:  
AC07-90ID13019
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
torque; shudder; protection; device; method; induction; machine; flux; command; generator; supplying; steady; detector; status; including; negative; indicate; lack; positive; presence; adapter; supply; identical; limiter; receive; prevent; exceeding; predetermined; maximum; magnitude; field; oriented; controller; determining; critical; electrical; excitation; frequency; occurs; adjuster; monitor; adjust; monitored; reaching; torque shudder; electrical excitation; excitation frequency; flux command; induction machine; protection device; shudder protection; oriented controller; field oriented; /318/

Citation Formats

King, Robert D, De Doncker, Rik W. A. A., and Szczesny, Paul M. Torque shudder protection device and method. United States: N. p., 1997. Web.
King, Robert D, De Doncker, Rik W. A. A., & Szczesny, Paul M. Torque shudder protection device and method. United States.
King, Robert D, De Doncker, Rik W. A. A., and Szczesny, Paul M. Wed . "Torque shudder protection device and method". United States. https://www.osti.gov/servlets/purl/870861.
@article{osti_870861,
title = {Torque shudder protection device and method},
author = {King, Robert D and De Doncker, Rik W. A. A. and Szczesny, Paul M},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {1}
}

Patent:

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