Denso Corporation

Keiji Kondo

Makoto Taniguchi

Asaka Kimura

Shin Kusase

Takeo Maekawa

Akito Akimoto

Akira Fukushima

Tomoya Takahashi

Toru Wakimoto

Hirofumi Kinjo

Jun Ishida

In a rotary electric machine, a rotor, and a stator. The stator includes slots provided in a circumferential direction thereof, and stator windings wound in the slots. The stator windings include n groups of three-phase windings, where n is a power of 2. The slots include first slots each accommodating portions of same-group and same-phase windings in the n groups of three-phase windings. The energizing directions of the same-group and same-phase windings are identical to each other. The second slots each accommodate different-group and same-phase windings in the n groups of three-phase windings. The first slots and the second slots are arranged in the stator at predetermined intervals in a circumferential direction of the stator, and the three-phase windings of each group are wound around the stator with regular intervals therebetween.

Rotary electric machine and rotary electric machine system

In an onboard charging apparatus, a plurality of main electric-power storage apparatuses are connected in series to one another. A main electric-power storage apparatus on a lowest potential side of the main electric-power storage apparatuses is a lowest potential electric-power storage apparatus. The lowest potential electric-power storage apparatus has a nominal voltage that is set to 12 V, and supplies electric power to an electrical component mounted to a vehicle. In the onboard charging apparatus, a connecting unit selectively connects, by switching control, the output terminal and any of high potential side terminals of the main electric-power storage apparatuses. A switching control unit controls switching of the connecting unit to switch the high potential side terminal selected as a connection destination of the output terminal among the high potential side terminals of the main electric-power storage apparatuses, based on an output voltage of the output terminal.

Onboard charging apparatus

A rotating electric machine apparatus includes a rotating electric machine and a full-bridge inverter. The full-bridge inverter includes first high-side switches, first low-side switches, second high-side switches, and second low-side switches. The rotating electric machine apparatus includes: first and second neutral point switches; a full-wave driving unit that performs a full-wave driving process in which switching control of the switches is performed in a state in which the first and second neutral point switches are turned off; a half-wave driving unit that performs a half-wave driving process in which switching control of the first high-side switches and the second low-side switches is performed in a state in which the first and second neutral point switches are turned on, and the first low-side switches and the second high-side switches are turned off; and an executing unit that selects and performs either of the full-wave driving process and the half-wave driving process.

Rotating electric machine apparatus

A rotating electric machine system includes a rotating electric machine and an electric power conversion circuit. The rotating electric machine includes N coils connected with each other to define a neutral point therebetween. The electric power conversion circuit includes N high-side switches, N low-side switches, a selector switch, a full-wave driver, a half-wave driver and a drive controller. The full-wave driver performs a full-wave drive process with high potential-side terminals of the low-side switches respectively connected with low potential-side terminals of the high-side switches by the selector switch. The half-wave driver performs a half-wave drive process with the high potential-side terminals of the low-side switches connected with the neutral point by the selector switch. The drive controller controls both the full-wave driver and the half-wave driver to selectively cause either the full-wave driver to perform the full-wave drive process or the half-wave driver to perform the half-wave drive process.

Rotating electric machine system

A stator which may be employed in an electric rotating machine. The stator includes a stator winding which includes in-slot portions disposed in slots of a stator core. The in-slot portions are arrayed in each of the slots in a form of multiple layers aligned in a radial direction of the stator core. The stator winding is made up of a first winding and a second winding which are connected together through a joint. The first winding is defined by a portion of the stator winding between the joint and an end of the stator winding which is to be connected to an external. The second winding includes the in-slot portion placed within at least one of the slots as an outermost layer that is one of the layers placed most outwardly in the radial direction of the stator core. This results in a great decrease in leakage current.

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Kariya, Japan

Keiji Kondo