Abstract:
PROBLEM TO BE SOLVED: To enhance the rotor torque during superimposition of a current pulse on a current vector for generating a revolving magnetic field in a rotary electric machine control system.SOLUTION: A rotary electric machine control system contains a control device for controlling a rotary electric machine. When a current phase which provides the maximum reluctance torque exists between a first current phase θ1 of a first current vector Ibefore a current pulse is superimposed and a second current phase θ2 of a second current vector Iwhose d-axis current is increased and whose q-axis current is reduced, the control device sets an intermediate current vector Im having an intermediate phase θm between the first current phase θ1 and the second current phase θ2. The intermediate current vector Im is set to be larger than a virtual current vector Im at an intermediate phase θm when the vector locus varies linearly from the first current vector Ito the second current vector I. The current vector is successively varied to I, Im, I, and successively returned to Im, I, thereby generating the current pulse.
Abstract:
PROBLEM TO BE SOLVED: To decrease magnetic reluctance in a magnetic passage through which magnetic flux generated in a stator passes and to improve performance of a rotary electric machine, with a structure including a plurality of rotor core elements arranged at a plurality of portions in a circumferential direction of a rotor for the rotary electric machine.SOLUTION: A rotor 14 comprises: a shaft 25 including a plurality of outer projection parts 46 on an outer peripheral surface; a first core element 54 and a second core element 56 being a plurality of rotor core elements including inner recess parts 70 with which some of the outer projection parts 46 are engaged in an axial direction, respectively; and a plurality of coils 28n, 28s, 30n, and 30s which are wound around the respective core elements 54 and 56. The core elements 54 and 56 are respectively disposed at a plurality of positions on the outside in a circumferential direction of the shaft 25 to form a rotor core 24 coupled with the shaft 25. The core elements 54 and 56 adjacent to each other in the circumferential direction are contacted with each other in the circumferential direction at rotor side root portions 62 and 82 on the side coupling to the shaft 25.
Abstract:
PROBLEM TO BE SOLVED: To effectively suppress voltage fluctuation of DC voltage input to an inverter in a rotary electric machine control system configured to allow pulse current to flow into a stator coil of a rotary electric machine, thereby generating induction current in a rotor coil.SOLUTION: A rotary electric machine control system 12 comprises: a first inverter 42 and a second inverter 44 which are connected in parallel with a battery 36; a first motor generator 22 and a second motor generator 24 which are respectively connected with the inverter 42 and the inverter 44; and a control unit 46. The first motor generator 22 flows induction current into a rotor coil due to a flux change caused by flowing first pulse current from the first inverter 42 to a stator coil. The control unit 46 performs control for flowing second pulse current from the second inverter 44 to the second motor generator 24 so that a change of DC voltage VH caused by the first pulse current is suppressed when the first pulse current is generated.
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic rotary electric machine that increases induced current generated in rotor windings.SOLUTION: A stator 12 includes a plurality of stator windings 20v wound around teeth 18. A rotor 14 includes: a rotor core; a plurality of rotor windings 28n wound around a plurality of main salient poles 26 of the rotor 14; and diodes, as magnetic property adjusting sections, that circumferentially vary magnetic properties developed in the main salient poles 26 by induced electromotive force generated in the rotor windings 28n. The rotor 14 has auxiliary salient poles 44, with polarities, that project from respective circumferential side surfaces of the main salient poles 26. Each of the auxiliary salient poles 44 has a width smaller than a circumferential width of each of the main salient poles 26.
Abstract:
PROBLEM TO BE SOLVED: To provide an electromagnetic rotary electric machine that allows many harmonic components included in a rotating magnetic field to be interlinked with rotor windings so as to increase induced current generated in the rotor windings.SOLUTION: A stator 12 includes a plurality of stator windings 20u, 20v, and 20w wound around teeth 18. A rotor 14 includes: a rotor core 24; a plurality of rotor windings 28n and 28s wound around a plurality of main salient poles 26 of the rotor 14; and diodes, as magnetic property adjusting sections, that circumferentially vary magnetic properties developed in the main salient poles 26 by induced electromotive force generated in the rotor windings 28n and 28s. The rotor 14 has auxiliary salient poles 44, with polarities, that project from respective circumferential side surfaces of the main salient poles 26.
Abstract:
PROBLEM TO BE SOLVED: To improve the efficiency of operation of a rotary electric machine.SOLUTION: A rotary electric machine 10 comprises: a stator which has a plurality of phases of stator coils, and generates stator magnetomotive force according to stator currents which are supplied to the plurality of phases of stator coils and each of which has a different phase; and a rotor which includes a plurality of rotor coils having rotor current flowing therethrough, generated according to the stator magnetomotive force generated by the stator, and restricting the rotor current direction to one way or opposite direction and which rotates by rotor magnetomotive force generated in each rotor coil with different polarity corresponding to the rotor current direction. A control unit 38 adjusts a ratio between the stator current and the rotor current so that copper loss of the stator and the rotor becomes minimum by controlling current supplied to the stator coil according to target torque and overlapping pulse with the stator current in a pulse overlapping unit 86.
Abstract:
PROBLEM TO BE SOLVED: To provide a rotary electric machine that allows an increase in torque even in a low-speed rotational range, while preventing excessive current from passing through stator windings, in a rotary electric machine drive system.SOLUTION: In a rotary electric machine drive system, a stator 12 has stator windings 28u, 28v, and 28w of a plurality of phases that are concentratedly wound around a stator core 26. A rotor 14 has: rotor windings 42n and 42s that are wound around a plurality of portions in a circumferential direction of a rotor core 16; and diodes 21n and 21s that are connected to the respective rotor windings 42n and 42s and serve as rectifiers that allow the respective rotor windings 42n and 42s to have circumferentially alternating different magnetic properties. The rotary electric machine drive system includes decreasing/increasing pulse superimposing means that superimposes a decreasing pulse current, which brings about a pulse-like decrease, on a q-axis current command for passing current through the stator windings 28u, 28v, and 28w and that also superimposes an increasing pulse current, which brings about a pulse-like increase, on a d-axis current command.
Abstract:
PROBLEM TO BE SOLVED: To provide an insulator suppressing damages and properly holding a coil, and to provide a dynamo-electric machine equipped with the insulator and a method of manufacturing the dynamo-electric machine. SOLUTION: The insulator is attached to a stator core, including a stator yoke and stator teeth projecting from a circumferential face of the stator yoke. The insulator includes a first division insulator 350 including a plate unit 351 in which a hole for inserting a stator tooth 371 is formed and a tooth reception unit 352 that is so formed as to project from the plate unit 351 and receives the stator tooth 371; and a second division insulator 300 that is disposed at a side opposite to the first division insulator 350 to the coil disposed in the first division insulator 350, and cooperates with the first division insulator 350 being capable of fixing the coil. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a rotary electric machine which suppresses deformation of a stator. SOLUTION: The rotary electric machine 2200 includes the stator 2210 structured by stacking magnetic steel sheets. Higher elastic modulus direction of the magnetic steel sheets is made to match the maximum deformation direction of the stator 2210. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a highly efficient motor while dropping-off of rotor winding is prevented. SOLUTION: The motor is provided with a rotor 104 which is arranged in a magnetic field formed by a stator and is rotated by the magnetic field and keeps a salient pole 16 of the rotor 104 provided with rotor windings 14a and 14b arranged near a gap with the stator and rotor windings 14af and 14bf which are different from the rotor windings 14a and 14b and are disposed far from the stator compared to the rotor windings 14a and 14b in the motor. COPYRIGHT: (C)2011,JPO&INPIT