DUAL MOTOR ELECTRIC VEHICLE DRIVE WITH EFFICIENCY-OPTIMIZED POWER SHARING

摘要

An electric vehicle drive has a first motor/generator, a second motor/generator, and a set of wheels. A gear set couples the first and second motor/generators to the set of wheels such that a total wheel torque is selectably divided between the first and second motor/generators. A torque calculator responds to an operator speed input to select a total torque target. A torque allocator substantially maximizes a combined efficiency of the first and second motor/generators by dividing the total torque target into first and second torque targets for the first and second motor/generators according to a ratio selected in response to an instantaneous motor/generator speed and the total torque target.

主权项

1. An electric vehicle drive comprising:
a first motor/generator; a second motor/generator; a set of wheels; a gear set coupling the first and second motor/generators to the set of wheels such that a total wheel torque is selectably divided between the first and second motor/generators; a torque calculator responsive to an operator speed input to select a total torque target; a torque allocator substantially maximizing a combined efficiency of the first and second motor/generators by dividing the total torque target into first and second torque targets for the first and second motor/generators according to a ratio is selected in response to an instantaneous motor/generator speed and the total torque target.