Abstract:
A motor which has an improved energy efficiency, is excellent in practical use and has a generator function at the same time. The motor is provided with a basic factor 15 having working surfaces 55a and 55c on both sides thereof, respectively, and movable members 57 made of a magnetic material and arranged opposite to the working surfaces, respectively. Further, the basic factor 15 is provided with an electromagnet element 17 and permanent magnets 19 arranged on both sides thereof through contact surfaces, respectively, and the working surfaces and the contact surfaces are held opposite to each other through the permanent magnets 19, respectively.
Abstract:
A rotor composite type three-phase stepping motor having a stator consisting of two stator elements each having 6 n pieces of stator magnetic pole with Ns pieces of pole tooth formed on the tip end of each stator magnetic pole piece, and a permanent magnet held by the two stator elements therebetween, a rotor of magnetic material arranged so as to face to a periphery of the stator through an air gap, Nr pieces of pole tooth being formed on a periphery of the rotor, and exciting windings wound around each stator magnetic pole piece of the stator elements consisting of two sets of three-phase windings each wound around 3n pieces of stator magnetic pole among the 6 n pieces of stator magnetic pole. A mechanical angle formed between the adjacent magnetic pole pieces in the 3n pieces of magnetic pole with each set of three-phase windings is 60° m/n and a mechanical degree angle formed between the 3n pieces of magnetic pole with each set of three-phase windings is (60° m/n−&thgr;s), where Nr is a number of rotor pole teeth, each of n, m and Ns is an integer not less than 1, and &thgr;s is a step angle of (30°−Nr) k where k is an integer number not less than 1.
Abstract:
A switched stepping motor for use in a computer-controlled processing system, the motor being capable AC or DC operation in a continuous or stepwise manner for completing a variety of operations such as lathe cutting, drilling, planning, milling, abrading, and boring.
Abstract:
A step motor which, in addition to an exciter system for step-by-step movement, is provided with an axial exciter system. As a result of the direct or indirect influence of the magnetic field generated by the secondary exciter system on the rotor which is supported, so as to be able to move in an axial direction with respect to the stator, the rotor can be induced to move in a direction perpendicular to its step-by-step rotary motion, as well. Both exciter systems can be energized independently of one another, so that step-by-step rotary movement can be performed at any axial position of the rotor and the rotor can be made to move in an axial direction during its rotary movement as well as when it is at rest.
Abstract:
A step motor comprising magnetic stationary members (1,11) containing a plurality of series of magnetic poles (1a, 1b, . . . 11a, 11b, . . . ) arranged at a predetermined regular pitch; a magnetic movable member (4) containing a plurality of series of magnetic poles (4a, 4b, . . . 41a, 41b . . . ) arranged at a predetermined regular pitch different from the magnetic poles series (1a, 1b, . . . 11a, 11b, . . . ), each magnetic pole series (4a, 4b, . . . , 41a, 41b,) having a magnetic surface opposing the magnetic surface of each of the pole series (1a, 1b, . . . , 11a, 11b, . . . ) through a gap; electric coils (2a, 2b . . . ) wound so as to energize the magnetic pole series and generating a first flux; a permanent magnet (5) containing a first magnetic pole face fixed to either the magnetic stationary member (1,11) or the magnetic movable member (4) and a second magnetic pole face which is arranged opposite to the magnetic stationary member (1,11) or the magnetic movable meber (4) through the gap and generating a second flux; and means (6,7) for mechanically displacing the magnetic movable member (4) with respect to the magnetic stationary members (1,11), characterized in that said electric coils (2a,2b, . . . ) are so wound as to energize one magnetic pole, which belongs to one of groups each which includes a predetermined number of poles classified from the magnetic poles (1a, 1b, . . . 11a, 11b, . . . 4a,4b, . . . 41a, 41b, . . . ), generate the first flux in the same direction of the second flux, energize the other magnetic poles and generate the first flux in the counter direction of the second flux and energize the all electric coils (2a, 2b, . . . ) simultaneously and the permanent magnet (5) is so arranged that the first flux generated by the coils do not flow through the permanent magnet (5).
Abstract:
Iron surfaces of stator poles, rotor periphery, or both stator poles and rotor periphery, of stepping motors are manufactured without teeth. The stepping effects of teeth are obtained by bonding, to the toothless surfaces, webs composed of fluted magnetic material having alternate thin and thick sections magnetized in the direction of the thickness of the material and carrying soft magnetic inserts in the flutes. The inserts form virtual teeth. The thick sections are magnetized in the direction opposite to the thin section and the flutes extend in the direction transverse to the direction of relative motion between rotor and stator.
Abstract:
A stepping motor with a first and a coaxially disposed second stator section. The stator sections are axially separated by a coaxially disposed permanent-magnetic ring. On the inside, each stator section terminates in two coaxially disposed annular systems of teeth. The systems of teeth of each stator section have been shifted nominally by 1/2 tooth pitch relative to the rotor teeth and the systems situated on the outside relative to the permanent magnetic ring as well as the systems of teeth situated on the inside relative to the permanent magnetic ring exhibit a nominal mutual shift relative to the rotor teeth of 1/4 tooth pitch. Stepping angle errors in this stepping motor can now be eliminated to a high degree by symmetrically correcting the displacement of the outer systems of teeth relative to each other and/or the displacement of the inner systems of teeth relative to each other.
Abstract:
A pulse or stepping motor with a stator assembly and a rotor assembly has been found. The stator assembly comprises a cylindrical housing of ferromagnetic material, the first, second, third, and fourth ring shaped stators secured in said housing with some gaps between them, a pair of circular windings secured between the first and the third stators and between the second and the fourth stators respectively, the axis of said winding being identical or parallel to the axis of the pulse motor itself, each of said stators having a plurality of magnetic poles on the inner surface of the ring shaped structure, the angular duration of each magnetic pole of each stator being of uniform pitch. The rotor assembly is rotatably inserted in said stator assembly and comprises an axis, the first, second, third and fourth rotors each confronting the corresponding stators in said stator assembly, a cylindrical permanent magnet inserted between the second and third rotors so that the magnetic flux is generated in the axis direction, each rotor having a plurality of magnetic poles on the outer surface of the same, the number of magnetic poles on each rotor being the same as that on each stator, and each rotor being positioned so that the angular relationship of the magnetic poles of each rotor is staggered by 1/4 pitch of the poles.
Abstract:
A dynamoelectric machine having a stator enclosed in a rotor, the stator including spider-like projections each having teeth which coact with teeth on the interior of the rotor. The operating windings are located on the legs of the stator spider. A cylindrical permanent magnet provides an operating magnetic bias, and a flux guiding element steers the flux appropriately. A single-ended and a balanced embodiment are disclosed.