| 序号 | 专利名 | 申请号 | 申请日 | 公开（公告）号 | 公开（公告）日 | 发明人 |
|---|---|---|---|---|---|---|
| 201 | Direct current machine with switchable stator windings | US263235 | 1988-10-27 | US4949023A | 1990-08-14 | David J. Shlien |
| A direct current machine construction in which the rotor includes a permanent magnet with the stator including winding energizable from a direct current source. In a first embodiment first and second stationary slip rings are connected to an external direct current source. Coupled for rotation with the shaft are to first and second brush assemblies with brushes which are spring biased and protrude radially outwardly from the rotor shaft. The commutator for the windings is stationary relative to the housing and includes a plurality of commutator segments positioned intermediate the slip rings and in a cylindrical manner facing inwardly toward, and for contact with, the commutator brushes. The windings are on the stator with the winding leads being accessible externally of the stator for enabling switching devices to be utilized for changing of the number of turns of the stator windings for thereby varying the motor characteristics, as needed. The switching devices may be mechanical switch devices or static semiconductor switch devices. In a second embodiment, commutation is effected by non-contact position sensing devices, such as encoder wheels, optical devices and the like, operable in response to a rotating device keyed to the rotor shaft, which device is positioned for electromagnetic accuracy relative to the pole positions of the stator of the machine. With accessible external leads, the machine may be alternately used as a propulsion motor, generator or alternator in the same device for returning power to the direct current source. | ||||||
| 202 | D.C. machine, with mechanical and electrical connections among collector segments | US803660 | 1985-12-02 | US4701655A | 1987-10-20 | Fritz Schmider |
| A small motor having a planar air gap has a rotor comprising a rotor shaft journalled in a carrier pipe of small diameter at whose outer periphery are mounted shape-retaining rotor coils which are cantilevered out into the air gap. This provides a rotor of very small axial moment of inertia, affording very short start-up times. The printed circuit collector has lamella-group connectors on both sides of the substrate. Such a motor is suitable especially for signal-recording or -reproducing apparatus. The arrangement of the rotor coils is symmetrical and yields a very simple and compact motor construction. | ||||||
| 203 | Magnetic driven motor | US754974 | 1985-07-15 | US4642534A | 1987-02-10 | Emile Mitchell |
| A motor having a rotor, said rotor being rotated by magnetic force, and having a novel switch for turning on and off an electrical field, and novel means for controlling said switch to provide a selected constant speed to said rotor, utilizing the attracting power and the repelling power of magnetic forces alternately. | ||||||
| 204 | Permanent magnet field diverted to do useful work | US612242 | 1984-05-21 | US4542361A | 1985-09-17 | Patrick E. Cavanagh |
| Permanent magnets are used to perform useful work. The field of a first permanent magnet is diverted by electromagnetic coils to such a low value that another opposing permanent magnet can approach the first magnet without the application of undue force. The field in the first magnet is restored to act on the second magnet so as to repel it. The force which results may be harnessed to effect reciprocal or rotary motion. | ||||||
| 205 | 4-Pole electric motor | US431422 | 1982-09-30 | US4524293A | 1985-06-18 | Fumito Komatsu |
| A 4-pole armature is accommodated with in a 4-pole permanent-magnet ring, either the ring or armature serving as the rotor. The core of the armature is cross-shaped, a set of two members of the core in straight orientation has windings applied on each member with opposite winding directions, and the cross-shaped core is provided at each winding of four core ends with separable back-up cores extending in the rotational direction of the armature or in the direction opposite to the rotational direction of the ring. A device for converting armature polarity is provided which alternates the direction of electric current for the armature every 90.degree. rotation of the rotor. | ||||||
| 206 | Magnetic motor | US107030 | 1979-12-26 | US4517477A | 1985-05-14 | David P. Pankratz |
| A plurality of permanent magnets are arranged to have spaced apart alternating opposite poles at the peripheral of the rotor. A stator magnet alternately attracts the first pole and repels the second pole of each sequential permanent magnet to cause rotation of the rotor. During the interval in which the stator magnet is intermediate to the poles of a given rotor magnet, the force of the stator magnet is nullified. | ||||||
| 207 | Direct current motor with magnetic coupling | US118983 | 1980-02-06 | US4347453A | 1982-08-31 | Ernst Gaus |
| A direct-current motor has a housing in which a stator and a rotor are mounted. A commutator is located in the housing but spaced from the stator and the rotor and subdivided from the same by a transverse housing wall. A magnetic coupling having two relatively rotatable elements is mounted in the housing extending through the transverse wall and the two elements define with one another an air gap in which a hood-like partition is located which is sealingly connected with the transverse wall so that the commutator is sealingly separated from the stator and rotor but is driven by one of the parts of the magnetic coupling which in turn is magnetically driven by the other part of the coupling that receives torque from the shaft of the motor. | ||||||
| 208 | Apparatus for generating mechanical energy responsive to interaction of magnetic fields | US6184 | 1979-01-24 | US4292553A | 1981-09-29 | Frank V. Deputato |
| An apparatus for generating mechanical energy responsive to the interaction of a plurality of magnetic fields so as to generate increased mechanical energy from a given quantity of electrical energy as compared with presently known devices, and so as to increase efficiency and enable conservation of electrical energy, which includes a permanent magnet, an electrical conductor connected to a source of electrical current, a core about which the electrical conductor is wound, positionable adjacent the permanent magnet and comprised of material which is magnetizable by operation of the magnetic field of the permanent magnet thereon or by the flow of electrical current from the source through the electrical conductor wound about the core, a plurality of permanent magnets, and means for supporting the plurality of permanent magnets in a position relative to the permanent magnet and core such that a portion of the path of movement of the plurality of permanent magnets is adjacent the position of the permanent magnet and core, including a pair of shafts, and a pair of support discs each secured to each shaft, with each set of a plurality of permanent magnets secured to the perimeter of each support disc at spaced apart locations thereabout such that opposite ends thereof extend outwardly therefrom. | ||||||
| 209 | Electric motor | US972984 | 1978-12-26 | US4291248A | 1981-09-22 | Michael A. Rainbolt |
| An electric motor having exceedingly high efficiencies includes three induction coils equally disposed about a circular path, a toroidally-shaped armature is disposed within the induction coils. The armature has a non-magnetic segment placed therein, thereby creating a pair of poles. Gear means are disposed within the armature and are operatively coupled thereto to provide mechanical output energy. The motor is driven by sequentially connecting a D.C. voltage to each of the three induction coils for a prescribed time. | ||||||
| 210 | Electromotive device including magnetic shield interacting with permanent magnet pole faces | US633002 | 1975-11-18 | USRE29165E | 1977-03-29 | George Fred Bode |
| An electric motor is composed of two counter-rotating discs having intermeshing gearing and each carrying a plurality of permanent magnets radially arranged with the same poles at the periphery of both discs. A shield of magnetic material is provided at one side extending partly around the periphery of each of the discs and into substantially the bite of the discs. An electromagnetic is arranged with one pole adjacent the bite of the discs, with means to energize the electromagnet as each of the permanent magnets reaches the bite of the discs to create a field of such polarity as to make the magnetic poles of the adjacent permanent magnets move away from the bite of the discs in the direction away from the shield, utilizing the combined forces of the electromagnetic force and the repelling force of the permanent magnets to effect rotation. | ||||||
| 211 | Method of manufacturing rare earth permanent magnet rotor | US586909 | 1975-06-16 | US3979821A | 1976-09-14 | Samuel Noodleman |
| A rotor containing rare earth magnet material which can be assembled, machined and then magnetized. A stack of laminations is built up, pieces of virgin rare earth magnet material are inserted in the slots provided therefor in the laminations, the laminations with the rare earth magnet material are cast with aluminum, the cast rotor is machined and the rare earth magnet material is then magnetized. The strength of the rare earth magnets in the rotor may be adjusted after magnetization thereof. | ||||||
| 212 | Centerless brushless DC motor | US53261774 | 1974-12-13 | US3914629A | 1975-10-21 | GARDINER WILLIAM P |
| A centerless brushless DC motor having a cylindrical housing containing thrust bearings mounting a rigid cylindrical drive tube for rotation about a central axis, wherein the internal surface of the drive tube defines a cylindrical passageway extending through the motor housing. A plurality of permanent magnets forming an annular ring are secured to the outer surface of the drive tube for rotation therewith. A cylindrical stator core fixedly secured within the housing around the drive tube is wound for presenting a plurality of induced magnetic poles at raised field pole pieces cooperatively aligned with and in close proximity to the rotating permanent magnets. An annular slip-ring assembly having a plurality of slip-ring elements eccentrically movable around the central axis provides selective sequential energization of the stator windings from a DC source responsive to rotation of the drive tube, creating an induction-repulsion state between the induced and permanent magnetic fields which exerts a continuous rotational torque upon the drive tube. A centerless helical propulsion member may be secured to the drive tube, providing a weedless boat propulsion motor having significantly increased thrust ratings.
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| 213 | Direct current motors | US40667773 | 1973-10-15 | US3906321A | 1975-09-16 | SALIHI JALAL TAWFIQ |
| This invention relates to improved direct current motors where an auxiliary path is provided for the flow of reactive energy associated with motor winding inductances during fast changes in current. These changes occur while the brushes move from one commutator segment to another during motor rotation. The auxiliary path limits the induced voltage automatically to a predetermined maximum value thus allowing higher motor speed, higher power density and longer life.
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| 214 | Electric motor utilizing permanent magnets | US47290974 | 1974-05-23 | US3895245A | 1975-07-15 | BODE GEORGE FRED |
| An electric motor is composed of two counter-rotating discs having intermeshing gearing and each carrying a plurality of permanent magnets radially arranged with the same poles at the periphery of both discs. A shield of magnetic material is provided at one side extending partly around the periphery of each of the discs and into substantially the bite of the discs. An electromagnet is arranged with one pole adjacent the bite of the discs, with means to energize the electromagnet as each of the permanent magnets reaches the bite of the discs to create a field of such polarity as to make the magnetic poles of the adjacent permanent magnets move away from the bite of the discs in the direction away from the shield, utilizing the combined forces of the electromagnetic force and the repelling force of the permanent magnets to effect rotation.
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| 215 | Commutating structure for dc permanent magnet machines | US47131374 | 1974-05-20 | US3876892A | 1975-04-08 | NOODLEMAN SAMUEL |
| A DC permanent magnet machine in which the functions typically attributed to the stator and rotor assemblies are reversed to provide an "inside out" design. The stator is provided with a plurality of electrically energizable poles having windings which are electrically coupled to associated commutator bars forming an annular array. Also associated with the stator are a pair of annular conductive rings. The rotor is provided with a plurality of permanent magnet poles equal in number to the poles provided in the stator. The rotor also carries a plurality of roller contacts which serve to couple the commutator bars to the conductive rings which are, in turn, connected to opposite polarities of the DC energizing source, thereby providing electrical power to associated coils of the stator winding.
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| 216 | Commutating structure for d.c.permanent magnet machines | US38388373 | 1973-07-30 | US3819964A | 1974-06-25 | NOODLEMAN S |
| A DC permanent magnet machine in which the functions typically attributed to the stator and rotor assemblies are reversed to provide an ''''inside out'''' design. The stator is provided with a plurality of electrically energizable poles having windings which are electrically coupled to associated commutator bars forming an annular array. Also associated with the stator are a pair of annular conductive rings. The rotor is provided with a plurality of permanent magnet poles equal in number to the poles provided in the stator. The rotor also carries a plurality of roller contacts which serve to couple the commutator bars to the conductive rings which are in turn connected to opposite polarities of the DC energizing source, thereby providing electrical power to associated coils of the stator winding.
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| 217 | Direct current motor system | US3786287D | 1971-12-27 | US3786287A | 1974-01-15 | STEIN J |
| A direct current rotary apparatus of the type disclosed in U.S. Pat. No. 3,631,273, of which the present disclosure is a continuation-in-part, the improvement comprising a commutator switch having two arcuate blades, mounted for rotation with the rotor and evenly spaced thereon, and stationary segments connected to the stator coils. The segments are of like angular width and arranged in a circle for contact by the rotating blades which have an angular width approaching, but not greater than, 180* less the angular width of one of the segments. Thus, the stator coils are excited at all times except the relatively short time each blade contacts only one segment, when switching occurs.
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| 218 | Magnetic motors | US3686521D | 1971-04-07 | US3686521A | 1972-08-22 | HENRY-BAUDOT JACQUES |
| An electromagnetic motor operating from relative attractions and repulsions between inductor poles and winding coils of a commutator supplied armature, having 2p inductor poles on one face of an airgap, p being a number higher than one, 2n winding coils, n being a number higher than p though not being a multiple of p, and 2n commutator blades.
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| 219 | Direct current motor having improved commutation means | US3678359D | 1970-12-21 | US3678359A | 1972-07-18 | PETERSON DONOVAN F |
| A direct current motor of the type having a bar magnet rotor utilizes magnetic reed switches as a commutation means. The reed switches are operable by the bar magnet rotor to effect commutation of the motor.
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| 220 | Magnetically commutated brushless d.c. torque motor | US3662196D | 1970-08-12 | US3662196A | 1972-05-09 | RUSCHMANN FRED |
| A brushless direct current motor operating through the interaction of a permanent magnet field with a commutated electro-magnetic field of changing polarity wherein current is carried from the external circuit to the windings of the armature by magnetic reed switches, each switch connected at one end to the external circuit and at the other end to the terminal of successive armature windings. The switches are placed in two circular arrays, each array containing in this instance 33 equiangularly-aligned members. A rotating magnet and plate assembly with two permanent magnet locations facing each of the arrays sequentially closes switches in two pairs, each pair consisting of one switch in the first array and one in the second array, to energize the armature windings at each operative position of the rotating magnet and plate assembly.
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