Method and assembly of an electric machine
First Claim
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1. An electric machine assembly comprising:
- a housing;
a shaft configured to operably couple with a source of rotational force and rotate about a rotational axis and having a shaft cooling passage;
an arm carried by and extending radially outward from the shaft and having a first cooling passage different from the shaft cooling passage; and
an exciter rotor and a permanent magnet generator rotor carried by the arm;
wherein the exciter rotor and the permanent magnet generator rotor are substantially coplanar at a plane orthogonal to the rotational axis.
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Abstract
A method and assembly of a dry cavity oil cooled electric machine includes a housing, a shaft configured to operably couple with a source of rotational force and rotate about a rotational axis, and an exciter rotor and a permanent magnet generator rotor carried by the shaft, wherein the exciter rotor and the permanent magnet generator rotor rotate relative to the housing, which provides such a construction of dry cavity generators that have high efficiency and high power density.
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Citations
15 Claims
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1. An electric machine assembly comprising:
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a housing; a shaft configured to operably couple with a source of rotational force and rotate about a rotational axis and having a shaft cooling passage; an arm carried by and extending radially outward from the shaft and having a first cooling passage different from the shaft cooling passage; and an exciter rotor and a permanent magnet generator rotor carried by the arm; wherein the exciter rotor and the permanent magnet generator rotor are substantially coplanar at a plane orthogonal to the rotational axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of operating an electric machine, comprising:
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rotating a rotatable shaft about a rotational axis, the shaft carrying an arm extending radially outward from the shaft, an exciter rotor, and a permanent magnet generator rotor; and supplying liquid coolant from a rotatable shaft cooling passage to a first contained cooling passage extending through the arm to extract heat from the arm; wherein at least one of the exciter rotor or the permanent magnet generator rotor is mounted to the arm, and wherein the exciter rotor and the permanent magnet generator rotor are substantially coplanar at a plane orthogonal to the rotational axis. - View Dependent Claims (15)
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Specification