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Hybrid-secondary uncluttered induction machine

Patent ·
OSTI ID:874095
 [1]
  1. Oak Ridge, TN
+ Show Author Affiliations

An uncluttered secondary induction machine (100) includes an uncluttered rotating transformer (66) which is mounted on the same shaft as the rotor (73) of the induction machine. Current in the rotor (73) is electrically connected to current in the rotor winding (67) of the transformer, which is not electrically connected to, but is magnetically coupled to, a stator secondary winding (40). The stator secondary winding (40) is alternately connected to an effective resistance (41), an AC source inverter (42) or a magnetic switch (43) to provide a cost effective slip-energy-controlled, adjustable speed, induction motor that operates over a wide speed range from below synchronous speed to above synchronous speed based on the AC line frequency fed to the stator.

Research Organization:
LOCKHEED MARTIN ENERGY RES COR
DOE Contract Number:
AC05-96OR22464
Assignee:
Lockheed Martin Energy Research Corporation (Oak Ridge, TN)
Patent Number(s):
US 6310417
OSTI ID:
874095
Country of Publication:
United States
Language:
English

References (2)

Performance optimization for doubly fed wind power generation systems journal January 1999
Design of a brushless doubly-fed induction motor for adjustable speed drive applications conference October 1996

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Related Subjects

/310/318/322/
100
40
41
42
43
66
67
73
adjustable
alternately
based
below
connected
cost
coupled
current
effective
electrically
electrically connected
fed
frequency
hybrid-secondary
induction
induction machine
inverter
line
machine
magnetic
magnetically
motor
mounted
operates
provide
range
resistance
rotating
rotor
secondary
shaft
slip-energy-controlled
source
speed
stator
switch
synchronous
transformer
uncluttered
wide
winding