Class / Patent application number | Description | Number of patent applications / Date published |
310196000 | Corona-prevention | 13 |
20090184600 | CONDUCTOR BAR FOR A ROTATING ELECTRICAL MACHINE - A conductor bar for a rotating electrical machine has an inner conductor with an essentially rectangular cross section sheathed in a straight section of the conductor bar by mica tape insulation. | 07-23-2009 |
20090243419 | Method of In Slot Tightness Measuring of Stator Coil - A method for measuring a tangential tightness of a stator coil within an armature slot of a stator assembly in an electric generator. The stator coil is excited to produce a vibratory response therein. The vibratory response of the stator coil is detected and a frequency response function of the vibratory response is determined. A tangential tightness of the stator coil within the armature slot is estimated based on the frequency response function of the vibratory response of the stator coil. | 10-01-2009 |
20100079027 | ROEBEL BAR FOR ROTATING ELECTRICAL MACHINES - A Roebel bar for a rotating electrical machine includes a straight slot part disposed in a slot in an iron sheet of a stator of the rotating electrical machine and a bent yoke part adjacent to the straight slot part and protruding from the stator, wherein the bent yoke part is configured to connect the Roebel bar to at least one more Roebel bar so as to form a winding. A copper conductor disposed in the straight slot part and the bent yoke part is surrounded by an insulation having an outer surface. A slot corona shielding includes an electrically conductive layer disposed on the outer surface of the insulation in an area of the straight slot part. A yoke corona shielding includes a semiconducting layer disposed on the outer surface of the insulation in an area of the bent yoke part. | 04-01-2010 |
20100181861 | MOTOR DEVICE MOUNTED ON MOBILE BODY AND MOBILE BODY HAVING THE MOTOR DEVICE MOUNTED THEREON - In a motor device 300 mounted on a mobile body, a pressurizing mechanism for increasing the pressure in a motor chamber 14 in which a motor is installed has a compressor 30, which is driven to rotate by an engine 20 serving as driving means for driving the mobile body, to produce compressed air for motor chamber pressurization, and the compressed air coming from the compressor 30 is fed into the motor chamber 14 through a pipe 72 almost constantly while the engine 20 is being driven. | 07-22-2010 |
20110062816 | Tape Structure with Conductive Outer Side and Electrically Insulating Inner Side - A wrapped stator coil for use in a generator. The wrapped stator coil includes an electrical conductor bar, a laminate tape structure, and a conductive structure. The laminate tape structure is disposed about the electrical conductor bar and includes an insulative first layer adjacent the conductor bar and a conductive second layer bonded to the first layer. The conductive structure includes a first end portion, an intermediate portion and a second end portion. The first end portion is in contact with the electrical conductor bar. The intermediate portion is in contact with the conductive second layer and is not in contact with the electrical conductor bar. The insulating layer is disposed about the conductive structure and the laminate tape. | 03-17-2011 |
20130193796 | HIGH VOLTAGE STATOR COIL WITH REDUCED POWER TIP-UP - An insulated stator coil ( | 08-01-2013 |
20130221790 | ELECTRICAL MACHINE COIL INSULATION SYSTEM AND METHOD - An insulation system and method are disclosed for insulating formed coils of electrical machines, such as motors and generators. The system includes strand/turn insulation that may include one or more layers of different materials, depending upon the dielectric requirements. A ground wall insulation is applied over the group of turns. The coil may be sized in a slot cell section. Additional insulation layers are provided, including a slot corona suppression insulation that extends just beyond stator slots, a voltage grading layer, and an armor layer. The resulting system is highly adaptable to different machine designs and ratings, and affords superior resistance to degradation. | 08-29-2013 |
20140246941 | EXTERNAL CORONA SHIELDING FOR AN ELECTRICAL MACHINE - An external corona shielding for a conductor bar of an electric machine, a main insulating layer sheath on the conductor bar. The shielding has a first ply, which sheaths the main insulating layer, and a second ply, which sheaths the first ply. Each ply is a conductive, impregnatable layer with a sliding layer, wherein the sliding layers of the two plies ( | 09-04-2014 |
20140327334 | METHOD FOR PRODUCING A CORONA SHIELD, FAST-CURING CORONA SHIELD SYSTEM, AND ELECTRIC MACHINE - The corona shield can be applied in electric machines in a faster manner by using radiation-cured materials. | 11-06-2014 |
20150008782 | END WINDING CORONA PROTECTION - An end winding corona protection including a winding of a rotating electric machine, having a conductor and a groundwall insulation surrounding the conductor, an end winding corona protection arranged on the outer surface of the groundwall insulation, the end winding corona protection comprising a first layer characterized in that the surface resistance of the first layer is in the range of 10 Ohm to 80 Ohm, and in that the end winding corona protection further comprises a second layer arranged on the outer surface of the first layer, wherein the second layer is made of semiconductive material, and wherein third layer is arranged on the outer surface of the second layer and made of medium resistive material. | 01-08-2015 |
20150042195 | CORONA SHIELD MATERIAL FOR AN ELECTRIC MACHINE - A corona shield material ( | 02-12-2015 |
20150115763 | WINDING LAYERS COMPOSED OF DIFFERENT MATERIALS - Fewer insulation layers can be used by virtue of using hydrophobic electrically conductive materials around a main insulation around a conductive bar. There are several more layers of conductive and/or non-conductive material. | 04-30-2015 |
20150381005 | Rotary Machine - The present invention aims to provide a rotary machine in which deterioration or a burnout of a corona prevention layer in the vicinity of a slot outlet of a stator can be suppressed from occurring. The present invention includes a stator that has a stator core, and a rotor that is arranged so as to face the stator and is rotatably held. In the rotary machine in which a stator coil having a low-resistance corona prevention layer wound around is mounted on the stator core, a conductive member is formed on the stator coil at an end portion of the stator so as to have a structure in which a gap with respect to the stator coil is widened as the conductive member is positioned away from the stator core in a rotary shaft direction of the rotary machine. | 12-31-2015 |