Patent application number | Description | Published |
20080238240 | ROTARY ELECTRIC MACHINE - A rotary electric machine according to present invention comprises a rotor and a stator disposed around the rotor in which the stator includes a stator core having, along its inner periphery region, a plurality of axially extending stator slots and an armature winding wound through the stator slots. In this rotary electric machine, each stator slot contains four radially layered armature bars; each armature winding is formed by electrically connecting at least one of the armature bars in a first slot and at least one of the armature bars in a second slot to each other; and the armature bars of a pair specified in accordance with a required output voltage of the rotary electric machine are connected to each other with a connecting piece. | 10-02-2008 |
20080296986 | BUSHING AND GENERATOR - In a bushing which has a terminal with a bend for connecting a conduit tube and a lead tube, the effect to cool the inner corner of the bend is enhanced. The bushing includes a conductive conduit tube, a conductive lead tube, and a terminal. The terminal has a bend and connects the conduit tube and the lead tube. Electric current and cooling gas flows in these tubes. A cooling means is provided for forced cooling of the inner corner of the bend of the terminal. One example of the cooling means is a guide vane which makes cooling gas flowing in the bushing come closer to the inner corner of the bend. A larger current can flow even when the bushing has the same size as a conventional one. | 12-04-2008 |
20090058205 | ROTATING ELECTRIC MACHINE - A rotating electric machine wherein sub slots serving as cooling fluid ducts in the axial direction are provided at the bottoms of the coil slots formed in the rotor, radial cooling fluid ducts are formed through the field coil of the rotor in the radial direction of the rotor and juxtaposed in the axial direction of the rotor, so as to communicate the sub slots with the air gap, and radial cooling fluid ducts are formed through the stator in the radial direction of the stator and juxtaposed in the axial direction of the rotor, corresponding in position to the radial cooling fluid ducts in the rotor, so as to communicate the inner periphery of the stator with the outer periphery of the stator. | 03-05-2009 |
20090140601 | ROTARY ELECTRIC MACHINE - In a rotary electric machine, for ensuring a cooling air flow between a rotor iron core and a stator iron core without enlarging a rotor, a separation preventing device is provided at a position between adjacent slots so as to correspond to each other at a shrink-fitting position where a retaining ring is shrink-fitted to a rotor iron core. Since a separation preventing position of the retaining ring is located at the shrink-fitting position, it is possible to reduce a length of the retaining ring itself so as not to be adjacent to the end portion of the stator iron core. Accordingly, a gap between the rotor iron core and the stator iron core does not reduce. As a result, it is possible to ensure a cooling air flow between the rotor iron core and the stator iron core without enlarging the rotor. | 06-04-2009 |
20090195091 | Rotary Electric Machine Having Cooling Device and Electric Generating System Including the Machine - A rotary electric machine which is smoothly operated with high efficiency by adequately controlling the cooling gas flow as needed to keep the highest temperature inside the rotary electric machine below a predetermined limit. The rotary electric machine includes a stator with armature windings wound around a stator core, a rotor placed inside the stator in a rotatable manner, and a cooling device for controlling cooling gas flow. It further includes a device for measuring an ambient temperature and a device for detecting armature voltage and/or armature current and/or field current. The temperature inside the rotary electric machine is calculated from the measured ambient temperature, detection value by the detecting device and an directive value of cooling gas flow. And a calculated suitable value of cooling gas flow is determined according to the calculated temperature inside the rotary electric machine. | 08-06-2009 |
20090267428 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core. | 10-29-2009 |
20110140566 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core. | 06-16-2011 |
20110140582 | ROTATING ELECTRICAL MACHINE - A rotating electrical machine includes: a rotor comprising a rotor core and a field winding wound round the rotor core; and a stator comprising a stator core and a stator winding wound round the stator core. The stator is arranged in opposition to the rotor with a predetermined spacing therebetween. the stator core is formed by punching a split piece, which comprises teeth for insertion of the stator winding thereinto and a core back on an outer periphery thereof, from a magnetic steel sheet, and laminating a plurality of those circular configurations in an axial direction, in which a plurality of the split pieces are arranged in a circle in a circumferential direction. The stator core has magnetic steel sheets, which are different in magnetic permeability in a diametrical direction, laminated at an axial end region of and in an axial central region of the stator core. | 06-16-2011 |
20120043863 | Electrical Machinery and Apparatus - In an electrical machinery and apparatus, a storage space is formed along an extension direction of a strand, and a temperature sensor is installed in the storage space of the strand, so that temperature of the strand can be immediately measured, and no pressure is applied to the temperature sensor in the process of forming a ground wall insulation thereby the temperature of the strand can be accurately measured. | 02-23-2012 |