Toyota Jidosha Kabushiki Kaisha

Yasuhiko Ishimaru

Yasutomo Kawabata

Tetsuya Miura

Masayuki Nakamura

Katsuhisa Endo

Masahiro Nishioka

Hiroshi Hattori

Koichi Sugiura

Tetsuya Sugimoto

Satoshi Koide

Yasuyuki Nishimoto

Yoshihito Kondo

A control device turns on a system relay and relays. A first boost converter rectifies an AC voltage supplied through a connector and a first power supply line. Further, the boost converter responds to a signal from the control device to boost the rectified voltage, and outputs the boosted voltage to a second power supply line. A second boost converter receives a voltage from the second power supply line to convert the voltage in accordance with a signal from the control device for output to a third power supply line. Since the system relay and one relay are both turned on, first and second batteries are connected in parallel to the third power supply line and a ground line. The first and second batteries are thereby charged.

Electrically-powered vehicle

The present invention is intended to provide a winding arrangement of single star connection for a rotating electrical machine, capable of enhancing insulation performance in coils of the same phase. In such winding arrangement, a first coil Uto a sixth coil Uare formed respectively in coil arranging partsU toU. Next, a coil arranging partU is skipped and the seventh coil Uis formed in a coil arranging partU. Then, a coil formed at the end of winding (eighth coil U) is formed in the skipped coil arranging partU.

Winding arrangement for rotating electrical machine

A circular wire with a circular cross section is wound on a coil reel. When a winding-form motor rotates a winding form, the circular wire is pulled and drawn from the coil reel. Rectangular forming rollers press the circular wire, so that a rectangular wire with a rectangular cross section is formed. The rectangular wire is directly wound on the winding form to be formed into a rectangular-wire coil. Because forming rectangular wire and winding on the winding form are carried out in a sequence of contiguous processes, a separate process for removing torsion set of the rectangular wire is unnecessary. The rectangular-wire coil can be formed from inexpensive circular material wire by a simple and low-cost apparatus. It is also possible and preferable to make dimensions and a shape of the rectangular wire variable by controlling clearance widths between the forming rollers and tension acting on the rectangular wire that has passed through the rollers.

Method for manufacturing a rectangular-wire coil

A coil is formed by winding a conductive wire around a winding frame that is being rotated about a rotational axis of the winding frame. Guide members contact the conductive wire being wound around the winding frame to define the winding position of the conductive wire. The guide members are supported by a link mechanism that is provided coaxially with the rotational axis so as to rotate synchronously with the winding frame. As a third actuator moves a driving link in the direction of the rotational axis, the guide members are moved in directions of a diameter of the winding frame. As a first actuator moves a holding link in the direction of the rotational axis, the guide members are moved in the direction of the rotational axis together with the holding link. As a second actuator extends or contracts an arm, one of the guide members is moved independently of another one of the guide members. The first, second and third actuators do not need to rotate together with the winding frame. Because the actuators do not need to be mounted on a rotating mechanism, the apparatus construction becomes more simple and the load on a winding frame-rotating motor can be reduced.

Wire winder and wire winding method

Apparatus for manufacturing a rectangular-wire coil

Growing community of inventors

Toyota, Japan

Yasuhiko Ishimaru