Prime-mover dynamo plants – Plural prime mover – Plural prime movers with fluid interconnection
Patent
1984-04-18
1986-02-25
Shoop, Jr., William M.
Prime-mover dynamo plants
Plural prime mover
Plural prime movers with fluid interconnection
290 4A, 290 4B, 290 1R, 322 40, H02K 702, H02P 1500
Patent
active
045729611
ABSTRACT:
The electrical supply system on aircraft may employ a constant speed drive (CSD) to convert variable engine speed to constant speed for operation of synchronous 400 Hz electrical generators. The heart of these devices is a differential which mechanically sums the input of two shafts and outputs this sum to a third shaft. Connected to this third shaft is a constant speed synchronous generator. Connected to one of the input shafts is the turbine generator (most likely through gearing). The second input shaft is connected to a speed compensating drive which accounts for engine speed changes. The speed compensating device disclosed herein is an electrically compensating motor/generator arrangement. Bidirectional power flow in the electric compensation link uses two high-speed, permanent-magnet, three-phase machines interconnected by a power conditioning network. One machine is operated as a brushless dc machine, while the other functions as a variable speed synchronous machine. Steady-state performance of two types of power conditioning are presented--a dc link inverter and a cycloconverter link.
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Franz Bernard E.
Ip Shik Luen Paul
Shoop Jr. William M.
Singer Donald J.
The United States of America as represented by the Secretary of
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