Rotary electric machine for vehicle
AssigneeDenso Corporation
InventorsShigenobu Nakamura, Atsushi Umeda, Masatoshi Kohmura
Life of this patent
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Abstract
A rotary electric machine has two sub-windings shifted by 30 degrees from each other. Each sub-winding is connected to an individual bridge which has MOS transistors on the ground sides. It is possible to supply a charging current even at a low rotational speed by switching the MOS transistors at a high-frequency. The basic components of magnetic force are canceled because of the shifted sub-windings. The switching components of the magnetic forces generated by the switching operation are canceled by switching two groups of the MOS transistors in opposite states. As a result, it is possible to decrease the magnetic noise significantly.
Claims20
A rotary electric machine for a vehicle, comprising:
- a stator having a poly-phase winding disposed on a stator core, the poly-phase winding including a first sub-winding and a second sub-winding shifted by a predetermined electric angle from the first sub-winding;
- a first bridge connected to the first sub-winding, the first bridge being interchangeable between a rectifier bridge connection and a short circuit connection;
- a second bridge connected to the second sub-winding;
- and
- a controller for switching between the rectifier bridge connection and the short circuit connection at a high-frequency.
A rotary electric machine for a vehicle, comprising:
- a stator having a poly-phase winding disposed on a stator core, the poly-phase winding including a first sub-winding and a second sub-winding;
- a first bridge connected to the first sub-winding, the first bridge being interchangeable between a rectifier bridge connection and a short circuit connection;
- a second bridge connected to the second sub-winding, the second bridge being interchangeable between a rectifier bridge connection and a short circuit connection;
- and
- a controller for switching the first and second bridges between the rectifier bridge connection and the short circuit connection at a high-frequency, the controller switching the first and second bridges in substantially opposite connection states so that one of the bridge is in the rectifier bridge connection when the other is in the short circuit connection.
A rotary electric machine for a vehicle, comprising:
- a stator having a poly-phase winding disposed on a stator core, the poly-phase winding including a first sub-winding and a second sub-winding;
- a first bridge connected to the first sub-winding, the first bridge being interchangeable between a rectifier bridge connection and a short circuit connection;
- a second bridge connected to the second sub-winding;
- a controller for switching between the rectifier bridge connection and the short circuit connection at a high-frequency;
- a first output terminal connected to an output of the first bridge;
- and
- a second output terminal connected to an output of the second bridge.
Dependencies are inferred from the claim text.