Accession Number : ADD004986

Title :   Counterrotation Electric Motor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Burtis,Wilson A

Report Date : 01 Nov 1977

Pagination or Media Count : 7

Abstract : An electric motor including a rotary armature and an annular field mounted for rotation around said armature and geared to said armature by way of planetary gearing fixed to the housing whereby the opposing torques of the field and the armature are summed at the motor output shaft. Such counter-rotating field arrangement provides for an increase in the flux cutting speed of the motor while, at the same time, maintaining the angular rate of the armature at a speed which is compatible with the containment of the centrifugal forces thereof. Both the armature and the field include concentric commutation rings at one end of the motor such that the field coils and the armature coils are excited at a predetermined phase angle by a plurality of field and armature brushes. Disposed along the field and armature brushes, and separated therefrom by at least one commutation segment are corresponding pick-up brushes which receive the collapsing field transient of the individual coils in both the armature and the field. These pick-up brushes are, in turn, connected to an amplifying device thereby restoring some of the energy losses back to the power source for the motor. (Author)

Descriptors :   *Patents, *Electric motors, Counterrotation, Flux(Rate)

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE