摘要:
At a time of a heating high-load operation, a harmonic current is flown in an armature winding to induction-heat rare-earth magnets, thus reducing a residual magnetic flux density. Thereby, the number of rotations of a radial gap type motor is improved. The rare-earth magnets are provided near a cooling medium passage extending substantially in parallel with a flow line of a cooling medium, so that the cooling medium recovers heat of the heated rare-earth magnets. At a time of a cooling high-load operation, a greater number of rotations are obtained with respect to the same torque command value, by a field weakening control by means of a current-phase advance.
摘要:
At a time of a heating high-load operation, a harmonic current is flown in an armature winding to induction-heat rare-earth magnets, thus reducing a residual magnetic flux density. Thereby, the number of rotations of a radial gap type motor is improved. The rare-earth magnets are provided near a cooling medium passage extending substantially in parallel with a flow line of a cooling medium, so that the cooling medium recovers heat of the heated rare-earth magnets. At a time of a cooling high-load operation, a greater number of rotations are obtained with respect to the same torque command value, by a field weakening control by means of a current-phase advance.
摘要:
An armature core includes a back yoke and teeth. The teeth include a plurality of magnetic plates laminated along a lamination direction. The back yoke includes holes through which the teeth are inserted. The holes penetrate through a pair of surfaces of the back yoke. The back yoke and the plurality of magnetic plates are welded to each other at a point at which an edge of a boundary between the adjacent magnetic plates and a surface forming the hole are close to each other and any one of the pair of surfaces is exposed.
摘要:
An armature core is formed by laminating a plurality of first magnetic plates along a lamination direction. The armature core includes a prism portion and a first rectangular solid portion. The prism portion has a length measured in a first direction perpendicular to the lamination direction and a height measured in a second direction perpendicular to the lamination direction and the first direction. The length of the prism portion gradually increases along the lamination direction in at least part of the prism portion. The first rectangular solid portion is adjacent to the prism portion in the second direction. The first rectangular solid portion has a uniform length measured along the first direction. Preferably, a plurality of the armature cores are mounted on a yoke and have armature windings wound to form an armature of a rotary electric machine of a compressor.
摘要:
Teeth are arranged annularly around a rotation axis. The yoke has through holes. The through holes open in a radial direction around the rotation axis and in an axial direction along the rotation axis. The teeth are inserted through the through holes. A metal plate is arranged to face the yoke in the axial direction. A reinforcing plate is fixed to the teeth.
摘要:
Teeth are arranged annularly around a rotation axis. The yoke has through holes. The through holes open in a radial direction around the rotation axis and in an axial direction along the rotation axis. The teeth are inserted through the through holes. A metal plate is arranged to face the yoke in the axial direction. A reinforcing plate is fixed to the teeth.
摘要:
A discharge valve mechanism has discharge openings. The number of discharge openings to be placed in the open state is varied depending on the pressure and the flow rate of gas refrigerant discharged from a compression chamber. Accordingly, the occurrence of overcompression losses at the time of controlling of the variable displacement of a compressor is inhibited during the operation from small to large displacement. This achieves improvements in compressor operating efficiency.
摘要:
An axial gap rotary electric machine includes a rotor, an armature and a stator. The rotor is capable of rotating in a circumferential direction about a rotation axis. The rotor includes permanent magnets and magnetic plates which cover those from the armature side. The armature includes an armature coil opposed to the rotor from one side in a rotation axis direction parallel to the rotation axis. The stator is opposed to the rotor from the other side in the rotation axis direction.
摘要:
A magnetic member with an annular outer periphery and an inner periphery includes first portions and second portions alternately disposed in its circumferential direction. The first portions and second portions are magnetically separated in the circumferential direction by gaps, which block magnetic fluxes from flowing in the circumferential direction between the first portion and second portion. The first portions respectively have holes extending almost in the circumferential direction. The gaps are provided at both ends of the holes in the circumferential direction between the outer periphery and inner periphery. An interior permanent magnet type rotor can be structured by inserting field magnets into the holes.
摘要:
The present invention provides a permanent-magnet-synchronous-motor having a stator with concentrated windings with the following structure so that permanent magnet (6) is hard to subjected to demagnetization magnetic field: 0.3 Lg