Electric machine for a vehicle
AssigneeVolvo Truck Corporation
InventorJohan Folkesson
Life of this patent
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Abstract
An electric machine comprising a rotor, a stator, and a fluid-based brake arrangement for said rotor, said fluid-based brake arrangement having a fluid circuit for transporting a brake fluid, said fluid circuit comprising a fluid channel arrangement having at least one radial fluid channel segment extending radially through a part of said rotor so as to allow for directing brake fluid from an inner radial rotor side to an outer radial rotor side, whereby, during rotation of said rotor about an axial centre axis, acceleration of brake fluid in said at least one radial fluid channel segment causes a reaction force exerting a braking torque on the rotor.
Claims16
An electric machine comprising a rotor, a stator, and a fluid-based brake arrangement for said rotor, said fluid-based brake arrangement having a fluid circuit for transporting a brake fluid, said fluid circuit comprising a fluid channel arrangement having at least one radial fluid channel segment extending radially through a part of said rotor so as to allow for directing brake fluid from an inner radial rotor side to an outer radial rotor side, such that, during rotation of said rotor about an axial center axis, acceleration of brake fluid in said at least one radial fluid channel segment causes a reaction force exerting a braking torque on the rotor.
A method for braking a rotor of an electric machine, comprising receiving a request for braking the rotor of the electric machine in response to a requested brake power;
- and controlling the flow of brake fluid in a fluid-based brake arrangement having a fluid circuit for transporting the brake fluid, so as to permit transportation of brake fluid through at least one radial fluid channel segment extending radially through a part of said rotor;
- such that acceleration of the brake fluid in the at least one radial fluid channel segment causes a reaction force exerting a braking torque on the rotor.
Dependencies are inferred from the claim text.