Improved SCR ac-motor controller for battery-powered urban electric vehicles
An electric vehicle propulsion system controller which uses an ac induction electric motor as the electrical to mechanical energy conversion unit was designed and developed. The contract program was to design and test an improved ac motor controller, which when coupled to a standard ac induction motor and a dc propulsion battery, would provide a complete electric vehicle power train with the exception of the mechanical transmission and drive wheels. In such a system, the motor-controller converts the dc electrical power available at the battery terminals to ac electrical power for the induction motor in response to the drivers commands. The performance requirements of a hypothetical electric vehicle with an upper weight bound of 1590kg (3500 lb) were used to determine the power rating of the controller. Vehicle acceleration capability, top speed, and gradeability requisites were contained in the Society of Automotive Engineers (SAE) Schedule 227a(d) driving cycle. The important capabilities contained in this driving cycle are a vehicle acceleration requirement of 0 to 72.4 kmph (0 to 45 mph) in 28 seconds, a top speed of 88.5 kmph (55 mph), and the ability to negotiate a 10% grade at 48 kmph (30 mph). A 10% grade is defined as one foot of vertical rise per 10 feet of horizontal distance. With the aid of a computer simulation, the vehicle acceleration, top speed, and gradeability requirements were translated into electric motor torque and shaft power requirements.
- Research Organization:
- Gould, Inc., Rolling Meadows, IL (USA). Gould Labs.-Electrical and Electronic Research
- DOE Contract Number:
- AI01-77CS51044
- OSTI ID:
- 5866934
- Report Number(s):
- DOE/NASA/0060-1; NASA/CR-167919; ON: DE83016077
- Resource Relation:
- Other Information: Portions are illegible in microfiche products. Original copy available until stock is exhausted
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ELECTRIC-POWERED VEHICLES
CONTROL SYSTEMS
COMPUTERIZED SIMULATION
ELECTRIC BATTERIES
ELECTRIC MOTORS
INVERTERS
SPEED REGULATORS
CONTROL EQUIPMENT
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
EQUIPMENT
MOTORS
SIMULATION
VEHICLES
330300* - Advanced Propulsion Systems- Electric-Powered Systems