Power capacitors for AC motors mounted diametrically on associated transmissions
First Claim
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1. A drive assembly for a vehicle comprising:
- a transmission;
a housing enclosing the transmission, the housing having a proximal end and a distal end;
a AC electric traction motor coupled to the transmission, wherein the AC electric traction motor is integral with the transmission;
an inverter axially mounted and integral with the AC electric traction motor; and
a power capacitor diametrically mounted around an outer surface of the housing of the transmission, the power capacitor being disposed at the proximal end of the housing and adjacent the AC electric traction motor such that the power capacitor is in close axial relation to the AC electric traction motor, wherein the power capacitor is mounted around a diameter of the transmission.
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Abstract
Power capacitors for AC motors are mounted diametrically on associated transmissions. The power capacitors are in one embodiment annular and in another embodiment, arcuate. By having power capacitors mounted on transmission housings diametrically, cooling of the power capacitors is facilitated for both air and liquid cooling.
42 Citations
20 Claims
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1. A drive assembly for a vehicle comprising:
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a transmission; a housing enclosing the transmission, the housing having a proximal end and a distal end; a AC electric traction motor coupled to the transmission, wherein the AC electric traction motor is integral with the transmission; an inverter axially mounted and integral with the AC electric traction motor; and a power capacitor diametrically mounted around an outer surface of the housing of the transmission, the power capacitor being disposed at the proximal end of the housing and adjacent the AC electric traction motor such that the power capacitor is in close axial relation to the AC electric traction motor, wherein the power capacitor is mounted around a diameter of the transmission. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. The drive assembly for a vehicle comprising:
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a transmission; a housing enclosing the transmission; an AC electric traction motor coupled to the transmission and adjacent to a first stage of the transmission, wherein the AC electric traction motor is integral with the transmission and disposed within the housing; an inverter axially mounted and integral with the AC electric traction motor; and a power capacitor diametrically mounted around an outer surface of the housing of the transmission, wherein the power capacitor is mounted around a diameter of the first stage such the power capacitor is in close axial relation to the AC electric traction motor.
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20. A drive assembly for a vehicle comprising:
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a transmission; a housing enclosing the transmission; an AC electric traction motor coupled to the transmission and adjacent to a first stage of the transmission, wherein the AC electric traction motor is integral with the transmission and disposed within the housing; an inverter axially mounted and integral with the AC electric traction motor; and a power capacitor diametrically mounted around an outer surface of the housing of the transmission around a diameter of the first stage such that the power capacitor is in close axial relation to the AC electric traction motor, wherein; the power capacitor is arcuate and has first and second ends separated by a gap; and the power capacitor is electrically connected to an electric drive unit of the AC electric traction motor and configured as a power buffer to maintain a relatively smooth DC link voltage.
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Specification