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US 4,485,310 AGranted
Combination of a compression or expansion turbine engine and an electric motor
AssigneeValbrev (Societe a Respondabilite Limitee)
InventorPierre de Valroger
Life of this patent
Estimating the term…
Abstract
A motor generator set utilizing a compression or expansion turbine engine. Fixed to the shaft of this turbine engine are the drive and pick-up rotors of a brushless direct-current motor with permanent magnets, the turbine engine bearings serving also as bearings for the electric motor. Application to the momentary or continuous supercharging of reciprocating heat engines, to gas turbine power plants, to cryogenic units and to all plant installations utilizing a compression and/or expansion turbine.
Claims7
Motor-and-generator assembly, comprising:
- a rotary fluid compression and/or expansion machine having a stationary casing and a bladed turbo-section encased therein and integral with a rotating shaft journalled in a bearing for accurate centering of said turbo-section with minimal clearance between the rotary blades thereof and the adjacent portion of said stationary casing, and
- a battery-feedable direct-current brushless electric motor unit having a rotor integral with said rotating shaft and carrying permanent magnets, a stator carrying electric windings and surrounding said rotor with a high tolerance air-gap and centering therebetween compared with the clearance and centering between said machine casing and turbo-section, a transistorized electronic circuit for electric commutation of said stator windings, and rotor speed sensing means for the control of said electronic circuit, whereby said electric motor has a self-synchronous operation.
Dependencies are inferred from the claim text.