Nagoya Institute of Technology

Toyota Jidosha Kabushiki Kaisha

Daikin Industries, Ltd.

Aisin Corporation

Samsung Electronics Co., Ltd.

Kabushiki Kaisha Toyota Jidoshokki

Takashi Kosaka

Yoshinari Asano

Nobuyuki Matsui

Eiji Yamada

Ryoji Mizutani

Hiroaki Matsumori

Subrata Saha

Kazutaka Tatematsu

Yoshihito Sanga

Hiroki Iwai

Toshinari Kondou

Minoru Yoshida

Masashi Watanabe

Norimoto Minoshima

Isao Fujiwara

Toshihiko Yoshida

Masayuki Takada

Masaki Saijo

Yoshinobu Ito

Kazuki Tonogi

Naoto Saito

Yasuhiro Takagi

Kaoru Yoshikawa

Hiroshi Hiyama

Kenji Tamada

Yoshihiro Uchiyama

Yoshifumi Maeda

Hiroshi Nishimura

Yuuki Nakabayashi

In a first control state, it is determined which one of a first failure pattern (FP) and a second failure pattern (FP) is a failure pattern (FT), and in a second control state, it is determined which one of a first lower-stage-side failure pattern (LF) and a second lower-stage-side failure pattern (LF) is a lower-stage-side failure pattern (LF), and it is determined which one of a set of upper-stage-side arms of a first inverter (), a set of lower-stage-side arms of the first inverter (), a set of upper-stage-side arms of a second inverter (), and a set of lower-stage-side arms of the second inverter () is failure-side arms, based on a result of the determination in the first control state and a result of the determination in the second control state.

Rotating electrical machine control device

A rotary electric machine includes a rotor, and a stator facing the rotor with a predetermined gap interposed between the rotor and stator. The stator has a stator core formed in a substantially circular annular shape and provided with an armature slot and a field slot alternately arranged in a circumferential direction, an armature winding housed in the armature slot, and a field winding and a first field magnet housed in the field slot. The armature winding generates a rotating magnetic field to rotate the rotor by being supplied with an alternating current armature current. The field winding generates a field flux by being supplied with a direct current field current. The first field magnet changes a magnetic force by the field flux.

Rotary electric machine, compressor, refrigeration device, and vehicle

The present disclosure relates to a flux switching motor capable of realizing all a high output, a miniaturization, and an extremely light weight. In the flux switching motor, a stator is provided such that a length thereof in an axial direction in which a rotating shaft extends is shorter than a length of each magnet in the axial direction, and a rotor is provided such that a length thereof in the axial direction is less than or equal to the length of the stator in the axial direction.

Flux switching motor and cleaner using the same

A rotary electric machine control apparatus () suitably controls two inverters () connected to associated ends of open windings (). The rotary electric machine control apparatus () performs target control involving: controlling a first one of the inverters (), which is selected from a first inverter () and a second inverter (), by rectangular wave control; and controlling a second one of the inverters () by special pulse width modulation control that is one type of pulse width modulation control. The special pulse width modulation control is a control method to produce a switching pattern (Su+) that is based on a difference between a switching pattern resulting from the pulse width modulation control and a switching pattern (Su+) resulting from the rectangular wave control when a target voltage is to be generated in the open windings ().

Rotary electric machine control apparatus

Two inverters () provided at respective both ends of open-end windings () are appropriately controlled. As control regions (R) of a rotating electrical machine (), a first speed region (VR) and a second speed region (VR) in which the rotational speed of the rotating electrical machine () is higher than in the first speed region (VR) for the same torque are set, and in the second speed region (VR), a rotating electrical machine control device () controls both inverters (), a first inverter () and a second inverter (), by mixed pulse width modulation control in which control is performed such that a plurality of pulses with different patterns are outputted during a first period (T) which is a half cycle of electrical angle, and an inactive state continues during a second period (T) which is the other half cycle.

A stator core including field slots housing field windings and armature slots housing armature windings is provided. Permanent magnets are housed in the respective armature slots. Field windings face to the permanent magnets directly or via the stator core on the outer and inner circumferential sides. A coil end of one of the armature windings straddles the predetermined one of the field slots and passes over the axial end face of each of the permanent magnets in the corresponding one of the field slots over which the coil end straddles.

Rotary electric machine

A stator core including field slots housing field windings and armature slots housing armature windings is provided. Permanent magnets are housed in the respective armature slots. The armature windings are configured by a first winding and at least one second winding. The field winding passes over the permanent magnet. The second windings each have a part embedded between a coil end of the field winding and teeth around which the field winding is around.

Electric rotary machine

An electric motor includes a rotor and a stator including a stator core, a plurality of armature windings, a plurality of field windings, and a plurality of bonded magnets. The stator core has a plurality of teeth alternately defining field slots and armature slots along a circumferential direction, and a stator yoke magnetically coupling the plurality of teeth opposite the rotor. Each armature winding is wound around two of the teeth sandwiched between an adjacent pair of the armature slots. Each field winding is wound around two of the teeth sandwiched between an adjacent pair of the field slots. The magnets are individually located in the field slots while opposing the field windings in the radial direction. Each adjacent pair of the magnets along the circumferential direction respectively has an adjacent pair of pole surfaces, with the adjacent pair of pole surfaces having a same polarity.

Electric motor

A stator core and a rotor core are provided. The stator core includes field windings receiving a direct current, and armature windings receiving an alternating current. Permanent magnets, each housed in one of the slots together with ones of the field windings, and in contact with the ones of the field windings, are provided. The field windings are provided on both of inner and outer circumferential sides of the permanent magnets.

Rotating electric machine

A rotary electric machine includes a rotor core, a stator, a field yoke, and a field winding. The rotor core is fixed to a rotary shaft, which includes a magnetic body for forming a magnetic path, and magnetic salient poles. The stator has teeth and a stator winding wound around the teeth by concentrated winding. A slot is formed between adjacent ones of the teeth in a circumferential direction. The field yoke magnetically connects the stator and the magnetic body. The field winding is located in proximity to at least one of the winding ends of the stator winding in an axial direction of the rotary shaft. The field winding generates a magnetic pole on the magnetic salient poles when energized.

An electric motor driving device that drives an electric motor including a field winding, a rotor and a stator, wherein the rotor and the stator each form a field pole by passing a field current through the field winding, includes: a power supply device; a converter including a reactor that at least partially serves as the field winding shared with the electric motor, and configured to receive a voltage from the power supply device to carry out voltage conversion between first and second power lines and to pass the field current through the field winding during voltage conversion operation; an inverter configured to convert a direct-current power received from the converter to an alternating-current power for driving the electric motor; and a controller controlling the converter so that a current flows through the field winding in the same direction both during power running and regeneration of the electric motor.

Electric motor driving device and vehicle equipped with the same

An electric motor has a field pole formed by a field current passing through a field winding. A voltage booting converter converts output voltage of a battery and outputs the voltage between a power source line and a grounding line. Field winding is electrically connected onto an electric current channel between battery and power source line and formed so that voltage switched by a switching element is applied to both ends. A controller controls the field current so as to adjust density of magnetic flux between a rotor and a stator by performing switching control on switching element and a switching element connected in parallel to field winding and converts the output voltage of battery into voltage in accordance with a voltage command value.

Drive device of electric motor

A rotating electric motor includes a stator core, a rotational shaft capable of rotation, a field yoke allowing a flow of magnetic flux in an axial direction, first and second rotor cores fixedly installed on the rotational shaft, a first magnet fixedly installed between the first rotor core and the second rotor core, a first rotor teeth formed at the first rotor core, a second magnet provided alongside of the first rotor teeth in the circumferential direction of the first rotor core, a second rotor teeth formed at the outer surface of the second rotor core, protruding outwardly in the radial direction, a third magnet provided alongside of the second rotor core in the axial direction, and windings that can control the density of magnetic flux between at least one of the first rotor core and second rotor core and the stator core.

Rotating electric motor

A rotating electric motor includes a rotary shaft capable of rotation, a stator core formed in a cylindrical configuration, a rotor core fixed to the rotary shaft, a magnet set at the rotor core such that a pair of magnetic poles of different magnetism are aligned in the radial direction of the rotor core, a field yoke provided at the perimeter of the stator core, and a winding that can control the magnetic flux density across the rotor core and the stator core by forming a magnetic circuit across the field yoke and the rotor core.

Deep drawing of a work can be made by securing a certain amount of feed of the work from the side of a cushion ring to a vertical wall surface of a stationary die. In this drawing method, for the drawing of the work, a die part interlocked to a movable die is engaged in a recess of the stationary die in a direction different from the direction of pushing. An edge of the work is displaced in unison with the cushion ring and the movable die clamping it in cooperation, and the die part starts to push the work immediately before the instant when the work located in the vicinity of the cushion ring is brought into contact with the edge of the recess of the stationary die. The resistance of contact between the work and the stationary die thus is not increased in the vicinity of the cushion ring when the die part pushes the work, and a certain amount of feed of the work from the side of the cushion ring can be secured.

Growing community of inventors

Nagoya, Japan

Takashi Kosaka