Electric machine for hybrid motor vehicle
First Claim
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1. A power system for a motor vehicle having an internal combustion engine, the power system comprising:
- an electric machine further comprising;
a stator having coils for receiving ac electrical power to provide a magnetic field;
a permanent magnet rotor spaced from the stator to define a first air gap relative to an axis of rotation for the permanent magnet rotor;
an uncluttered rotor spaced from the permanent magnet rotor to define a second air gap relative to an axis of rotation for the permanent magnet rotor;
at least one secondary core assembly spaced from the uncluttered rotor by a third air gap wherein the secondary core assembly is disposed around an axis of rotation for the uncluttered rotor to allow induction of a slip energy current in the secondary core assembly without inducing a rotational energy current; and
a gearing arrangement for coupling the internal combustion engine to wheels on the vehicle via the permanent magnet rotor and the uncluttered rotor thereby providing a means for the electric machine to both power assist and brake in relation to the output of the internal combustion engine.
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Abstract
A power system for a motor vehicle having an internal combustion engine and an electric machine is disclosed. The electric machine has a stator, a permanent magnet rotor, an uncluttered rotor spaced from the permanent magnet rotor, and at least one secondary core assembly. The power system also has a gearing arrangement for coupling the internal combustion engine to wheels on the vehicle thereby providing a means for the electric machine to both power assist and brake in relation to the output of the internal combustion engine.
30 Citations
10 Claims
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1. A power system for a motor vehicle having an internal combustion engine, the power system comprising:
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an electric machine further comprising; a stator having coils for receiving ac electrical power to provide a magnetic field; a permanent magnet rotor spaced from the stator to define a first air gap relative to an axis of rotation for the permanent magnet rotor; an uncluttered rotor spaced from the permanent magnet rotor to define a second air gap relative to an axis of rotation for the permanent magnet rotor; at least one secondary core assembly spaced from the uncluttered rotor by a third air gap wherein the secondary core assembly is disposed around an axis of rotation for the uncluttered rotor to allow induction of a slip energy current in the secondary core assembly without inducing a rotational energy current; and a gearing arrangement for coupling the internal combustion engine to wheels on the vehicle via the permanent magnet rotor and the uncluttered rotor thereby providing a means for the electric machine to both power assist and brake in relation to the output of the internal combustion engine. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of providing power to a vehicle wheel using a power system comprising the steps of:
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driving a ring gear coupled to an uncluttered rotor using planetary gears coupled to an engine thereby providing torque to a permanent magnet rotor coupled to the vehicle wheel and sun gear, combining torques of the uncluttered rotor and permanent magnet rotor using a counter torque in the uncluttered rotor to aid the planetary gear set in traveling around the sun gear, operating the power system in a mode selected from at least one of the group consisting of motoring mode, regenerative braking mode, and field weakening mode, decoupling the ring gear from the drive system by inserting a lock pin in the ring gear thereby taking the permanent magnet rotor and the electric machine out of the power system. - View Dependent Claims (10)
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Specification