Rotating electrical machine
OwnerStefan Kupisiewicz, Jacques J. F. Schoebrechtsinventors
Life of this patent
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Abstract
Rotating electrical machine of the type comprising a stationary portion and a moving portion coaxial therewith, the stationary portion carrying a first and a second windings, while the moving portion has a third winding, characterized in that said third winding consists of a number of bar sets each of which comprises two interconnected bars, the said number of bar sets being either equal to the number of pole pairs of the stator winding having the largest pole pitch in the case of a one-phase rotor, or equal to three times said number of pole pairs in the case of a three-phase rotor.
Claims16
A rotating electrical machine of the type comprising a stationary portion and a moving portion coaxial therewith, said stationary portion including a first and a second winding, and said moving portion including a single phase third winding, said first and second windings having pole pitches even multiples or sub-multiples of each other and a mutual zero inductance, said third winding being alone and closed on itself, the arrangement being such that said first winding generates a field inducing current into said third winding, said current generating a fixed flux in relative rotation with respect to said moving portion which has the same pole pitch as said second winding and magnetically interacts with said second winding, said third winding including a number of bar sets each of which comprise two interconnected bars, said number of bar sets being equal to the number of pole pairs of said first or second winding having the largest pole pitch.
A synchronous alternator of the type comprising a stator and a single phase rotor coaxial therewith, said stator carrying a first and a second winding, and said rotor a third winding, said first and second windings having pole pitches an even multiple or sub-multiple of each other and a mutual zero inductance, said third winding being alone and closed on itself, the arrangement being such that said first winding generates a field inducing current into said third winding, said current generating a fixed flux in relative rotation with respect to said rotor which has the same pole pitch as said second winding and magnetically interacts therewith, said third winding comprising a number of bar sets, each of which comprises two interconnected bars, said number of bar sets being equal to the number of pole pairs of said stator winding having the largest pole pitch;
- means for connecting said first winding to a direct current supply;
- and means for obtaining an output electromotive force from said second winding.
A synchronous alternator of the type comprising a stator and a three-phase rotor coaxial therewith, said stator carrying a first and a second winding, and said rotor a third winding, said first and second windings having pole pitches an even multiple or sub-multiple of each other and a mutual zero inductance, said third winding being alone and closed on itself, the arrangement being such that said first winding generates a field inducing current into said third winding, said current generating a fixed flux in relative rotation with respect to said rotor which has the same pole pitch as said second winding and magnetically interacts therewith, said third winding comprising a number of bar sets, each of which comprises two interconnected bars, said number of bar sets being equal to three times said number of pole pairs;
- means for connecting said first winding to a direct current supply;
- and means for obtaining an output electromotive force from said second winding.
A rotating electrical machine of the type comprising a stationary portion and a moving portion coaxial therewith, said stationary portion including a first and a second winding, and said moving portion including a three-phase third winding, said first and second windings having pole pitches even multiples or sub-multiples of each other and a mutual zero inductance, said third winding being alone and closed on itself, the arrangement being such that said first winding generates a field inducing current into said third winding, said current generating a fixed flux in relative rotation with respect to said moving portion which has the same pole pitch as said second winding and magnetically interacts with said second winding, said third winding including a number of bar sets each of which comprise two interconnected bars, said number of bar sets being equal to three times the number of pole pairs of said first or second winding having the largest pole pitch.
Dependencies are inferred from the claim text.