Motor and electric power steering device
AssigneeNidec Corporation
InventorsYoshiaki Yamashita, Hiromitsu Ohashi
Life of this patent
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Abstract
A motor includes a first inverter connected to one end of a winding of each phase and a second inverter connected to another end of the winding of each phase. The first inverter includes a terminal electrically connected to one end of a U-phase winding. The second inverter includes a terminal electrically connected to another end of the U-phase winding. Current output from the terminal of the first inverter and passing through the U-phase winding flows to the terminal of the second inverter. Current output from the terminal of the second inverter and passing through the U-phase winding flows to the terminal of the first inverter. The terminal of the first inverter and the terminal of the second inverter are adjacent to each other.
Claims10
A motor comprising:
- an n-phase winding, n being an integer equal to or greater than 3;
- a first inverter electrically connected to a first end of the winding of each phase;
- and
- a second inverter electrically connected to a second end of the winding of each phase;
- wherein
- the n-phase winding includes a first-phase winding;
- the first inverter includes a first terminal electrically connected to the first end of the winding of the first-phase,
- the second inverter includes a second terminal electrically connected to the second end of the winding of the first-phase;
- a current output from the first terminal of the first inverter and passing through the first-phase winding flows to the second terminal of the second inverter;
- a current output from the second terminal of the second inverter and passing through the first-phase winding flows to the first terminal of the first inverter;
- the n-phase winding includes a second-phase winding;
- the first inverter is provided with a third terminal electrically connected to the first end of the winding of the second-phase;
- the second inverter is provided with a fourth terminal electrically connected to the second end of the winding of the second-phase;
- a current output from the third terminal of the first inverter and passing through the second-phase winding, flows to the fourth terminal of the second inverter;
- a current output from the fourth terminal of the second inverter and passing through the second-phase winding, flows to the third terminal of the first inverter;
- the n-phase winding includes a third-phase winding:
- the first inverter includes a fifth terminal electrically connected to the first end of the winding of the third-phase;
- the second inverter includes a sixth terminal electrically connected to the second end of the winding of the third-phase;
- a current output from the fifth terminal of the first inverter and through the third-phase winding flows to the sixth terminal of the second inverter:
- a current output from the sixth terminal of the second inverter and passing through the third-base winding flows to the fifth terminal of the first inverter;
- and
- a distance between the first terminal of the first inverter and the second terminal of the second inverter is shorter than (i) a distance between the first terminal of the first inverter and all remaining terminals except for the second terminal of the second inverter, or (ii) a distance between the second terminal of the second inverter and all remaining terminals except for the first terminal of the first inverter.
Dependencies are inferred from the claim text.