Kabushiki Kaisha Toshiba

Toshiba Energy Systems & Solutions Corporation

Fuji Xerox Co., Ltd.

Masashi Kobayashi

Masafumi Fujita

Takashi Ueda

Koji Ando

Ken Nagakura

Takahiro Sato

Norio Takahashi

Tadashi Tokumasu

Mikio Kakiuchi

Yasuo Kabata

Hiroshi Hatano

Yoshiyuki Inoue

Toshio Hirano

Tetsushi Okamoto

Takashi Harakawa

Yuichiro Gunji

Makoto Kawahara

Tooru Ootaka

Jun Tsuda

Masamitsu Sakuma

Wataru Nakamura

Toshihiko Shinoda

Mitsuo Ueno

Hirotada Endo

According to an embodiment, a field winding interlayer short-circuit monitoring device comprises: an input unit configured to obtain field winding current values and field winding voltage values at a predetermined sampling cycle; a memory configured to store field winding resistance versus current characteristic curves at an abnormal state and a normal state; and a field winding resistance calculator configured to calculate a field winding resistance value by dividing the field winding voltage value by the field winding current; an average value calculator configured to calculate an average resistance value and an average current value by averaging those obtained during a predetermined time interval; and an image data generator configured to generate image data to display a predetermined number of average value data along with the field winding resistance versus current characteristic curves at the normal state and the abnormal state.

Field winding interlayer short-circuit monitoring device and field winding interlayer short-circuit monitoring method

In general, according to one embodiment, there is provided an abnormality detection system of a rotary electrical machine. The system includes a plurality of magnetic flux sensors disposed at intervals on a back of a stator core in a circumferential direction or an axial direction, and configured to detect a magnetic flux, and an abnormality detection apparatus configured to detect an abnormality of the stator core from a predetermined event that appears in a composite signal or a differential signal obtained from signals respectively output from at least two magnetic flux sensors of the plurality of magnetic flux sensors.

Abnormality detection system of rotary electrical machine

According to one embodiment, there is provided a three-phase even-numbered-pole two-layered armature winding housed in forty five slots per pole provided in a laminated iron core. Coil pieces corresponding to first and second parallel circuits are arranged in the first phase belt, coil pieces corresponding to fourth and fifth parallel circuits are arranged in the second phase belt, coil pieces corresponding to the third parallel circuit are arranged in the first and second phase belts, and the upper coil pieces and the lower coil pieces of each parallel circuit are placed in same-numbered positions from a pole center.

Armature winding of rotating electrical machine

According to one embodiment, there is provided a rotating electrical machine including a core, a coil extending from the core, and an electromagnetic shield which is provided outside the core, and has a plurality of shoulders projecting toward the coil. The coil includes an insulator covering outside of a conductor, a resistance layer formed on a surface of the insulator and contacting the core, and at least one potential grading layer formed on a surface of the insulator adjacent to the resistance layer. A boundary between the resistance layer and potential grading layer is provided at a position farther from the core than a point on a surface of the coil, where a distance between the coil and a shoulder of the electromagnetic shield closest to the core is the shortest.

Rotating electrical machine and coil

An electrophotographic toner is disclosed which comprises a colorant and a binder resin, in which the binder resin is present as a vinyl resin whose gel content ranges from 15 to 25% by weight and whose tetrahydrofuran-soluble content has a number-average molecular weight (Mn) ranging from 5,000 to 12,000, a weight-average molecular weight (Mw) ranging from 10.times.10.sup.4 to 40.times.10.sup.4 and a higher Mw peak in the range of from 9.times.10.sup.5 to 18.times.10.sup.5. The toner exhibits improved chargeability and improved powder fluidity as well as improved fixing properties and improved offset resistance. A process for producing the toner is also disclosed.

Electrophotographic toner containing a vinyl resin and process for

Growing community of inventors

Kawasaki, Japan

Masashi Kobayashi