Propulsion Wheel Motor for an Electric Vehicle

A wheel assembly for an electric vehicle includes a wheel rim that is concentrically disposed about a central axis. A propulsion-braking module is disposed within an interior region of the wheel rim. The propulsion-braking module rotatably supports the wheel rim for rotation about the central axis....

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Published inNASA Center for AeroSpace Information (CASI). Misc. Resources
Main Authors Figuered, Joshua M, Herrera, Eduardo, Weber, Steven J, Junkin, Lucien Q, Rogers, James Jonathan, Waligora, Thomas M, Bluethmann, William J, Farrell, Logan Christopher, Lee, Chunhao J, Vitale, Robert L, Winn, Ross Briant, Eggleston, IV, Raymond Edward, Guo, Raymond
Format Web Resource
LanguageEnglish
Published Hampton NASA/Langley Research Center 05.07.2016
Subjects
Automobile industry
Brake drums
Brake shoes
Braking
Braking systems
Electric motors
Electric vehicles
Propulsion
Rotation
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Summary:A wheel assembly for an electric vehicle includes a wheel rim that is concentrically disposed about a central axis. A propulsion-braking module is disposed within an interior region of the wheel rim. The propulsion-braking module rotatably supports the wheel rim for rotation about the central axis. The propulsion-braking module includes a liquid cooled electric motor having a rotor rotatable about the central axis, and a stator disposed radially inside the rotor relative to the central axis. A motor-wheel interface hub is fixedly attached to the wheel rim, and is directly attached to the rotor for rotation with the rotor. The motor-wheel interface hub directly transmits torque from the electric motor to the wheel rim at a 1:1 ratio. The propulsion-braking module includes a drum brake system having an electric motor that rotates a cam device, which actuates the brake shoes.
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