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| Number | Title | Issue Date |
| 7312550 | Architecture for electric machine In one aspect, an alternator is described which includes a current control apparatus including a stator winding and a control winding, wherein current control in the control winding regulates the stator winding. In another aspect, a gas turbine engine includes a mul... | 12/25/2007 |
| 7288923 | Voltage-limited electric machine An electric alternator having a rotor, stator and at least one winding in the stator adapted to conduct a current, the machine also having and first and second magnetic circuits around different portions of the winding which may be configured relative to one another... | 10/30/2007 |
| 7211016 | Geared motor with planetary gear assembly A geared motor includes a rotor mounted rotatably to a motor housing and having an output shaft along a rotating axis, and a stator secured to the motor housing to surround the rotor. The stator has a plurality of angularly displaced core segments with wall areas co... | 05/01/2007 |
| 7126313 | Architecture for electric machine The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be us... | 10/24/2006 |
| 7119469 | Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing A stator assembly for an electric motor includes a stator housing, a flux ring inserted into the stator housing after the stator housing is formed and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the ... | 10/10/2006 |
| 7012349 | Machined rotor assembly and method of making same The present invention provides a single piece machined rotor comprising a shell having an upper lip and a lower lip, with a pocket formed between the upper lip and the lower lip for mounting magnets therein. The magnets are fixed in place within the inner sidewall o... | 03/14/2006 |
| 6983529 | Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing A stator assembly for an electric motor includes a stator housing, an expandable flux ring inserted into the stator housing and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the flux ring, such as by i... | 01/10/2006 |
| 6966391 | Gear motor for power tool A compact gearbox/motor combination for a portable power tool has a single partition plate 23 closing an end of the gearbox housing 24 and the motor housing 19. A shaft 14 of the motor is journalled at one end in a self-aligning bearing | 11/22/2005 |
| 6965183 | Architecture for electric machine The invention includes an electric machine having a rotor, stator and at least one winding in the stator adapted to conduct a current, and a secondary winding, electrically isolated from the first winding and inductively coupled to the first winding, which may be us... | 11/15/2005 |
| 6921995 | Motor A motor comprises a casing made of magnetic material for housing a rotor and a coil wherein side surfaces of the casing have openings. The openings are closed by the magnetic plates that are thinner than the thickness of the material of the casing. ... | 07/26/2005 |
| 6903475 | Stator assembly with an overmolding that secures magnets to a flux ring and the flux ring to a stator housing A stator assembly for an electric motor includes a stator housing, an expandable flux ring inserted into the stator housing and a plurality of magnets on an inner surface of the flux ring. Overmold material is molded around the magnets in the flux ring, such as by i... | 06/07/2005 |
| 6707209 | Reduced cogging torque permanent magnet electric machine with rotor having offset sections A permanent magnet electric machine with reduced cogging torque includes a plurality of axial rotor sections that are defined on a radially outer surface of a rotor. The axial rotor sections include a set of permanent magnets that are in an unmagnetized state and th... | 03/16/2004 |
| 6465925 | Rotary electric machine having auxiliary poles A rotary electric machine includes a plurality of permanent magnet main poles disposed on an inner periphery of a yoke and a plurality of auxiliary poles respectively disposed between neighboring two of the main poles via magnet fixing members and a plura... | 10/15/2002 |
| 6376956 | Permanent magnet pole arrangement of motor A pole arrangement of a motor includes a plurality of permanent-magnet main poles disposed annularly at equal intervals on the inner periphery of a yoke, a plurality of auxiliary poles disposed between adjacent two of the main poles, and a plurality of ma... | 04/23/2002 |
| 6075301 | Compact motor A pair of C-shaped magnets are fitted to a resin holder and inserted as a unit into a cup-shaped motor case. The resin holder has a diameter that is slightly greater than the inside diameter of the motor case, but includes resilient elements that are comp... | 06/13/2000 |
| 6060799 | Magnet carrier for motor housing Permanent magnets are pre-positioned around an injection molded magnet carrier, and the magnet carrier together with the magnets is inserted through one end of a motor housing. Locating features of the magnet carrier position the magnets within the housin... | 05/09/2000 |
| 5874794 | Method for securing magnets to a permanent magnet motor shell and a motor made therefrom A pair of semicylindrical magnet segments are secured against the inner surface of a motor shell of a permanent magnet motor by wedging an elastic locking element into each space between the magnets. Each locking element has an enlarged head portion that ... | 02/23/1999 |
| 5675204 | Permanent magnet dynamo-electric machine A low-cost permanent magnet dynamo-electric machine which can prevent an occurrence of a chip in a permanent magnet and is superior in the ease of fabricating the machine. This machine has an elastic catching member consisting of a ring-like portion and a... | 10/07/1997 |
| 5600191 | Driving assembly for motor wheels A driving assembly for motor wheels including a plurality of permanent magnets arranged around the outer periphery of a securing element on an axle for forming a stator. When electric currents are passed through a plurality of winding coils in an inner wh... | 02/04/1997 |
| 5391063 | Magnet assembly for electric fuel pump A magnet assembly in an electric motor of a motor vehicle fuel pump includes a tubular ferromagnetic flux carrier closely received in a shell of the fuel pump between a pump at one end of the shell and an end housing at the other end, a pair of arc-shaped... | 02/21/1995 |
| 4973871 | Stator assembly having magnet retention by mechanical wedge constraint A stator assembly for a d.c. electric motor/generator has a pair of permanent magnet segments located on the interior surface of the yoke. The magnet segments are held in place by a pair of wedges which are attached to the yoke. The wedges are tapered inw... | 11/27/1990 |
| 4931681 | One-piece support and end cover structure for electric motors A combined support and end cover for electric motors, and for small permanent magnet dc units in particular, which is molded in one piece from insulating plastic material and formed essentially as a flat disk of which the inner surface affords a central s... | 06/05/1990 |
| 4897570 | Starter motor for automitove engine Elements which exhibit good thermal conductivity are disposed in contact with permanent magnets of an electric motor. These elements absorb heat from the magnets and reduce the rate at which the temperature of the magnets increases. The elements can be pr... | 01/30/1990 |
| 4665333 | Separator for securing magnets A separator for accurate positioning and easy replacement of magnets in an annular array around a spindle comprises an annularly shaped, elastic separator constructed of plastic materials. The plastic separator includes either cross machine struts that de... | 05/12/1987 |
| 4626178 | Fuel supply pump A fuel supply pump so structured that an electric motor section and a pump section are housed in a tubular casing provided with a pipe for connection with an external hose, and an opening of the casing is enclosed by an end cover integrally provided with ... | 12/02/1986 |
| 4619588 | Wet motor gerotor fuel pump with vapor vent valve and improved flow through the armature One set of circumferentially juxtaposed axial surfaces of the motor magnets of a wet motor gerotor pump are separated circumferentially by a tunnel device having a central bridge portion radially just clearing the rotating armature and bounded by a pair o... | 10/28/1986 |
| 4529902 | Frame module for forming tubular frame of permanent magnet direct current motor A frame (14) for a permanent magnet direct current motor (10) is formed of a plurality of frame modules (15). Each frame module (15) is of equal axial length and cross-sectional dimensions for being matingly connected together end-to-end to form the tubul... | 07/16/1985 |
| 4467231 | Permanent-magnet d.c. electric motor with resilient stator yoke A d.c. electric motor wherein the permanent magnets are kept in place by elastic fastening means carrying out an active magnetic function. The fastening means preferably includes yoke sectors each formed by two or more superimposed sheet members having an... | 08/21/1984 |
| 4414481 | Stator for rotating electric machine A rotating electric machine stator, the casing of which is formed by the assembly of two elements made from a plastics material of from another non magnetizable material; it comprises a holding part made integrally from a magnetizable material for forming... | 11/08/1983 |
| 4338533 | Electric machine excited by permanent magnets An electric machine without pole pieces excited by permanent magnets is disclosed in which the stator of the machine comprises a yoke frame of angular outside shape having an even number of corners which exceeds 2 and of circular inside shape. The yoke fr... | 07/06/1982 |
| 4237394 | Frequency generator and miniature motor provided with the same An improved frequency generator is disclosed. The frequency generator includes such a permanent magnet that is magnetized in the direction of the axis of a rotary shaft with which the rotor of the generator is rotated. Between the second magnetic pole sid... | 12/02/1980 |
| 4093882 | Coreless motor Disclosed is a coreless motor comprising a rotor having a plurality of flat-type loop coils arranged on a rotor substrate, a motor housing having a journal bearing for rotatably supporting said rotor, and a stator which includes a pair of permanent magnet... | 06/06/1978 |
| 4071794 | DC motor with permanent magnet retaining structure In a permanent magnet DC motor adapted for easy "drop-in" assembly within a generally cylindrical case having open and closed axial ends, a magnet retention member comprises a ring disposed within the case adjacent its closed end and provided with a plura... | 01/31/1978 |
| 4039871 | Cooling device for use in a low inertia electric motor A cooling device for use in a low inertia electric motor, in which there are provided a plurality of main passages for cooling air, around the outer circumferential surface of a cylindrical armature which surface is surrounded by magnetic pole pieces with... | 08/02/1977 |
