Disclosure is made of an inductor machine comprising a stator with a polyphase armature winding arranged on its teeth with a tooth pitch close, but not equal, to .pi. electrical degrees; the stator envelops a windingless toothed rotor, whereas a ring field winding produces a common magnetic flux enveloping the stator and the windingless toothed rotor; each phase of said armature winding consists of at least three series-connected and symmetrically arranged branches with a displacement therebetween in electrical degrees being multiple to 2.pi., each branch consisting of coils arranged upon adjacent teeth of the stator, the number of said teeth being different from the doubled number of the teeth of the windingless toothed rotor by a value equal to the doubled number of the branches.

A composite machine supplies speed and control signals to a speed controllable converter machine assembly equipped with thyristors. The composite machine includes a slotted stator subdivided into at least two sections along its circumference. An inductive pulse generator is provided having primary and secondary windings arranged in one of the sections and a tachometer generator is provided with excitation and alternating-current windings arranged in the other one of the sections. A damper winding is arranged intermediate the two sections to electrically separate the same. A toothed rotor is mounted to rotate in the stator to coact with the windings of the pulse generator and with the windings of the tachometer generator.

An ordinance platform with a variable reluctance electric motor is provided. The motor has a stator integrated with a bearing race which is fixably connected with the tank body. The bearing race provides the function of a rotor and is fixably or integrally connected with the tank turret. The rotor is vertically supported by the stator for rotational movement by a plurality of ball bearings. The stator is formed having a plurality of individual phase segments which are arranged in an annular array. Each of the stator phase segments is provided with a phase winding and a plurality of stator pole teeth. The stator phase windings are connected individually to respective driver circuits so as to essentially create a plurality of individual stators about the rotor. The rotor race is formed and is provided with a plurality of rotor pole teeth which are disposed adjacent the stator pole teeth. Thus, when the phase windings of the individual stator phase segments are energized, the moveable race (integrated with the rotor and connected with the gun turret) is rotated relative to the stationary race (integrated with a stator and connected with the tank body), without any intermediate coupling device such as gears, belts and the like.