Patent application number | Description | Published |
20100119390 | PERMANENT MAGNET MOTOR, HERMETIC COMPRESSOR, AND FAN MOTOR - An object is to provide a permanent magnet motor that highly reduces torque fluctuation, thereby reducing noise and vibration. The permanent magnet motor may be formed as follows: a length D of a permanent magnet | 05-13-2010 |
20100247347 | INDUCTION MOTOR AND HERMETIC COMPRESSOR - The present invention is directed to provide an induction motor having an ideal efficiency at the normal operation time, while obtaining a high locked-rotor torque without having to use a special drive circuit. According to the induction motor related to the present invention, the induction motor has a rotor | 09-30-2010 |
20100253174 | INDUCTION MOTOR ROTOR, INDUCTION MOTOR, COMPRESSOR, FAN, AND AIR CONDITIONER - To provide an indication motor rotor capable of improving motor performance by concentrating portions under magnetic saturation conditions of rotor teeth. The rotor | 10-07-2010 |
20110070108 | ROTARY ELECTRIC MOTOR AND BLOWER THAT USES THE SAME - In a rotary electric motor a first stator core and a second stator core are disposed coaxially so as to be separated by a predetermined distance axially and such that circumferential positions of teeth are aligned, and a first rotor core and a second rotor core on which salient poles are disposed at a uniform angular pitch circumferentially are fixed coaxially to a rotating shaft so as to be positioned on inner peripheral sides of the first stator core and the second stator core, respectively, and so as to be offset circumferentially by a pitch of half a salient pole from each other. A first permanent magnet that is magnetically oriented such that a direction of magnetization is radially inward is disposed on an outer peripheral surface of a core back of the first stator core, and an outer peripheral surface of the first permanent magnet and the outer peripheral surface of the core back of the second stator core are linked by a frame that is made of a magnetic material. | 03-24-2011 |
20110081263 | INDUCTION MOTOR AND HERMETIC COMPRESSOR - It is an object to obtain a highly efficient induction motor which does not degrade the fitting strength of shrink-fit and of which the starting torque is high, and further to obtain a highly reliable hermetic compressor which suppresses the oil amount flowing out of the hermetic compressor. According to the present invention, an induction motor includes a stator having a winding to be inserted to a plurality of stator slots formed along an inner circumferential edge of a stator iron core; and a rotor | 04-07-2011 |
20130140922 | ROTOR OF PERMANENT MAGNET EMBEDDED MOTOR, COMPRESSOR, AND REFRIGERATION AND AIR CONDITIONING APPARATUS - A rotor of a permanent magnet embedded motor according to this invention includes: a rotor iron core formed by stacking a predetermined number of electromagnetic steel plates perforated in a predetermined shape; a plurality of permanent magnet insertion holes formed along an outer circumferential section of the rotor iron core; permanent magnet end gaps provided at both ends of the permanent magnet insertion hole; a permanent magnet inserted in the permanent magnet insertion hole; and a plurality of slits formed in an iron core section on the outer side of the permanent magnet insertion hole. The width in the radial direction of a slit thin section of each of the slits between the slit and the rotor iron core outer circumference gradually increases from an inter-electrode side toward a magnetic pole center and changes in a sine wave shape having a peak in the magnetic pole center. | 06-06-2013 |
20130175896 | ROTOR OF INDUCTION MOTOR, INDUCTION MOTOR, COMPRESSOR, AIR BLOWER, AND AIR CONDITIONER - A rotor of an induction motor according to the present invention is a rotor including a squirrel-cage secondary conductor, wherein the rotor slot is constituted by an outer circumferential slot formed near an outer circumference of the rotor and an inner circumferential slot communicating with the outer circumferential slot and formed inside of the outer circumferential slot, a circumferential width TC of an innermost circumference of the outer circumferential slot is smaller than a circumferential width TD of an outermost circumference of the inner circumferential slot, and a circumferential width of the outer circumferential slot is smaller as the outer circumferential slot approaches to the outer circumference of the rotor. | 07-11-2013 |
20130214635 | INDUCTION MOTOR, COMPRESSOR, AIR BLOWER, AND AIR CONDITIONER - In an induction motor, when dimensions of respective elements of a rotor slot are defined as
| 08-22-2013 |
20140232230 | PERMANENT MAGNET EMBEDDED MOTOR AND COMPRESSOR, BLOWER, AND REFRIGERATING AND AIR CONDITIONING APPARATUS USING PERMANENT MAGNET EMBEDDED MOTOR - A permanent magnet embedded motor includes a rotor and permanent magnets. The outer circumferential surface of the rotor is formed by divided outer circumferential surfaces divided at equal angle intervals in a circumferential direction corresponding to permanent magnets. The divided outer circumferential surface is formed by a first curved surface, a radial direction distance of which from a rotor axis is maximized in a circumferential direction center of divided outer circumferential surface and second curved surfaces formed from the circumferential direction both ends to the circumferential direction center and crossing the first curved surface. The second curved surfaces are formed by arcuate surfaces each having the rotor axis as a central axis. A distance between both ends of the first curved surface is smaller than the width of a permanent magnet in a direction orthogonal to a radial direction in the circumferential direction center. | 08-21-2014 |
20140232231 | ROTOR OF INTERIOR PERMANENT MAGNET MOTOR, COMPRESSOR, AND REFRIGERATING AIR-CONDITIONING APPARATUS - A rotor of an interior permanent magnet motor includes a rotor core; permanent magnet insertion holes formed in an outer circumferential portion of the rotor core along a circumferential direction; a permanent-magnet end-portion air gap formed in each of both end portions of each permanent magnet insertion hole; a permanent magnet inserted in each permanent magnet insertion hole; and slits formed in an outer circumferential core portion on an outer side in a radial direction with respect to each permanent magnet insertion hole, wherein a width of a core present between the permanent-magnet end-portion air gap and the slit and a width of a core present between the slits are such that a width of a core gradually increases as the core is closer to a magnet pole center from the interpolar line. | 08-21-2014 |
20140368081 | ROTOR OF PERMANENT-MAGNET EMBEDDED MOTOR, AND COMPRESSOR, BLOWER, AND REFRIGERATING/AIR CONDITIONING DEVICE USING THE ROTOR - A rotor of a permanent-magnet embedded motor includes a rotor core having magnet insertion holes along a circumferential direction and a magnet inserted into each of the holes, wherein a gap is formed at opposite ends of a hole at a time of inserting the magnet therein, an outer peripheral face of the core is formed by a first curved surface formed from a magnetic pole center to between poles, with a radial distance from a shaft center of the core being largest at the pole center on the peripheral face, and a second curved surface formed from an interpolar portion toward the pole center to intersect with the first curved surface, with the radial distance from the shaft center being smallest in the interpolar portion on the peripheral face, and wherein a length of the first curved surface is larger than a length of the second curved surface. | 12-18-2014 |
20150028708 | MOTOR - A drive device driving a power converter that includes a switching element formed from a wide bandgap semiconductor, includes a PWM-signal output unit that generates a drive signal that drives the switching element with PWM; an on-speed reducing unit that, when the switching element is changed from off to on, reduces a change rate of the drive signal; and an off-speed improving unit that, when the switching element is changed from on to off, draws charge from the switching element at a high speed and with a charge drawing performance higher than that at a time when the switching element is changed from off to on. | 01-29-2015 |
20150084468 | ROTOR FOR PERMANENT-MAGNET-EMBEDDED ELECTRIC MOTOR, ELECTRIC MOTOR INCLUDING THE ROTOR, COMPRESSOR INCLUDING THE ELECTRIC MOTOR, AND AIR CONDITIONER INCLUDING THE COMPRESSOR - A rotor for a permanent-magnet-embedded electric motor includes slit holes each axially formed near opposite ends of a magnetic pole between an outer peripheral face of a rotor core and a magnet insertion hole, and forming a symmetrical shape in an approximately truncated chevron shape along the outer peripheral face of the rotor core, based on a centerline of each of the magnetic poles, wherein a thickness of each of permanent magnets is set to be twice or more of an air gap, a width of a shortest magnetic path in which a distance between the slit hole and the permanent magnet becomes shortest is set to be twice or more of the air gap, and an inclination of the slit hole with respect to a width direction of the permanent magnet orthogonal to a radial direction is set to be in a range from 0 to 30 degrees. | 03-26-2015 |