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Title: Constant power speed range extension of surface mounted PM motors

Abstract

A circuit and method for controlling a rotating machine (11) in the constant horsepower range above base speed uses an inverter (15) having SCR's (T1-T6) connected in series with the primary commutation switches (Q1-Q6) to control turn off of the primary commutation switches and to protect the primary commutation switches from faults. The primary commutation switches (Q1-Q6) are controlled by a controller (14), to fire in advance or after a time when the back emf equals the applied voltage, and then to turn off after a precise dwell time, such that suitable power is developed at speeds up to at least six times base speed.

Inventors:
 [1];  [1]
  1. Knoxville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
873759
Patent Number(s):
6236179
Assignee:
Lockheed Martin Energy Research Corporation (Oak Ridge, TN)
Patent Classifications (CPCs):
H - ELECTRICITY H02 - GENERATION H02P - CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02T - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
constant; power; speed; range; extension; surface; mounted; motors; circuit; method; controlling; rotating; machine; 11; horsepower; base; inverter; 15; t1-t6; connected; series; primary; commutation; switches; q1-q6; control; protect; faults; controlled; controller; 14; fire; advance; time; emf; equals; applied; voltage; precise; dwell; suitable; developed; speeds; six; times; dwell time; surface mounted; applied voltage; speed range; rotating machine; suitable power; surface mount; /318/388/

Citation Formats

Lawler, Jack Steward, and Bailey, John Milton. Constant power speed range extension of surface mounted PM motors. United States: N. p., 2001. Web.
Lawler, Jack Steward, & Bailey, John Milton. Constant power speed range extension of surface mounted PM motors. United States.
Lawler, Jack Steward, and Bailey, John Milton. Mon . "Constant power speed range extension of surface mounted PM motors". United States. https://www.osti.gov/servlets/purl/873759.
@article{osti_873759,
title = {Constant power speed range extension of surface mounted PM motors},
author = {Lawler, Jack Steward and Bailey, John Milton},
abstractNote = {A circuit and method for controlling a rotating machine (11) in the constant horsepower range above base speed uses an inverter (15) having SCR's (T1-T6) connected in series with the primary commutation switches (Q1-Q6) to control turn off of the primary commutation switches and to protect the primary commutation switches from faults. The primary commutation switches (Q1-Q6) are controlled by a controller (14), to fire in advance or after a time when the back emf equals the applied voltage, and then to turn off after a precise dwell time, such that suitable power is developed at speeds up to at least six times base speed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2001},
month = {1}
}

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