Variable current limit control for vehicle electric drive system
US6492785B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2000 |
| Grant date | Dec 10, 2002 |
| Priority date | — |
| Expiry date | Dec 23, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S903/919
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle electric drive system includes an internal combustion engine, an electric motor/generator driven by the engine, a first inverter/rectifier coupled to motor/generator, a bus coupled to the first inverter/rectifier, a second inverter/rectifier coupled to the bus, and a traction motor/generator coupled to an output of the second inverter/rectifier, an operator speed control member, and a controller coupled to the second inverter/rectifier for controlling a current output of the second inverter/rectifier as a function of a position of the speed control member. Also included is an operator controlled foot pedal and a transducer coupled to the foot pedal and generating a signal representing foot pedal position which is supplied to the controller. The controller limits current supplied by the second inverter/rectifier to the traction motor/generator to a limit current as a function of the transducer signal. The controller, foot pedal and transducer cooperate to vary the limit current in response to movement of the foot pedal. A spring biases the foot pedal to an upper limit position. The controller causes the second inverter/rectifier to supply to the traction motor/generator a …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.