Electric vehicle drive train with direct coupling transmission
An electric vehicle drive train includes an electric motor and an associated speed sensor, a transmission operable in a speed reduction mode or a direct coupled mode, and a controller responsive to the speed sensor for operating the transmission in the speed reduction mode when the motor is below a predetermined value, and for operating the motor in the direct coupled mode when the motor speed is above a predetermined value. The controller reduces the speed of the motor, such as by regeneratively braking the motor, when changing from the speed reduction mode to the direct coupled mode. The motor speed may be increased when changing from the direct coupled mode to the speed reduction mode. The transmission is preferably a single stage planetary gearbox. 6 figures.
- Research Organization:
- Ford Motor Company, Detroit, MI (United States)
- DOE Contract Number:
- AC07-90ID13019
- Assignee:
- General Electric Co., Fairfield, CT (United States)
- Patent Number(s):
- US 5,403,244/A/
- Application Number:
- PAN: 8-016,798
- OSTI ID:
- 35055
- Resource Relation:
- Other Information: PBD: 4 Apr 1995
- Country of Publication:
- United States
- Language:
- English
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