An electromechanical converter having electrical reduction, and made in the form of an inductor machine operating on the basis of utilization of tooth harmonics of the magnetic field. The inductor machine consists of a stator having at least one armature winding and a field winding, and a rotor, said stator having N zones, in each of which a relative arrangement of the stator and rotor teeth is identical; the invention is characterized in that said field winding consists of a multicoil winding with p pole pairs, while at least one armature winding is provided with a number of pole pairs equal to (N+p), (N-P). The use of the distributed field winding having the above-mentioned ratio between numbers of teeth permits to obtain substantially sinusoidal output voltage waveform in the generator mode and high uniformity of the rotational speed in the motor mode.
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 homopolar synchronous machine is disclosed which has a substantially lower inertia than equivalent conventional devices. The device includes components for forming a plurality of closed magnetic circuits along the axis of the stator, whereby the inertia is reduced and performance is improved.
A multi-phase generator without slip rings and brushes and with no windings in the rotor has its exciting winding and alternating current winding, with a mutual displacement of half a stator pole pitch, disposed in the stator. The generator has an even number of stator poles and a different number of rotor poles.
A variable reluctance electric motor includes a hollow cylindrical stator having a plurality of radially inwardly extending poles. Each of the stator poles is generally rectangular in cross sectional shape and is bifurcated into two stator teeth at its radially innermost end by a central, longitudinally extending slot. The outer circumferential edges of the stator pole teeth are beveled at their respective junctions with the sides of the stator pole. A stator pole gap width is defined between adjacent stator poles. A slot width is defined within each of the stator poles between the adjacent longitudinally extending edges of the slot. The ratio of the stator pole gap width to the stator pole slot width is in the range of from about 1.8 to about 2.3. A cylindrical rotor is co-axially supported within the stator for relative rotational movement. The rotor has a plurality of radially outwardly extending poles formed thereon. Each of the rotor poles is generally rectangular in cross sectional shape. The outer circumferential edges of the rotor poles are beveled at their respective junctions with the sides of the rotor pole to provide a tapered end. Each of the rotor poles defines a width which is measured at the outer circumferential surface thereof, extending between the two beveled edges. The rotor poles also defines a pitch which is measured from one point on a first rotor pole to the same point on the adjacent rotor pole. The ratio of the rotor pole width to the rotor pole pitch is in the range of from about 0.40 to about 0.47. Preferably, a motor having N stator poles will have 2.multidot.N stator pole teeth, and a rotor employed in such a motor 20 will have (2.multidot.N)+2 rotor poles.
