Electric motor speed controller supply circuit for a motor vehicle
This patent describes a motor vehicle electrical system having a storage battery, an electric motor for operating a vehicular load, a control device for providing a pulsed desired speed signal having a duty cycle which varies in relation to the desired motor speed, and an electronic controller adapted to receive battery current from the storage battery for controlling the motor in accordance with the desired speed signal. An electric supply system is described for connecting the storage battery and the electronic controller, comprising: electronic switch means having a load current carrying circuit connected directly between the storage battery and the electronic controller to define a path by which battery current may be drawn by the controller. A control terminal for electrically biases the switch means to a first state wherein the controller is free to draw battery current through the load current carrying circuit without substantial restriction or a second state wherein substantially no battery current can be drawn through the load current carrying circuit; and biasing means connected to the control terminal of the electronic switch means for biasing the switch means between the first and second states according to the desired speed signal such that the switch means is biased to the first state. This is done to permit the draw of battery current by the electronic controller when the motor speed command signal corresponds to a non-zero desired motor speed indication.
- Assignee:
- General Motors Corp., Detroit, MI
- Patent Number(s):
- US 4642538
- OSTI ID:
- 6720327
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
330300* -- Advanced Propulsion Systems-- Electric-Powered Systems
CONTROL EQUIPMENT
CONTROL SYSTEMS
CURRENTS
ELECTRIC BATTERIES
ELECTRIC CONTROLLERS
ELECTRIC CURRENTS
ELECTRIC MOTORS
ELECTRICAL EQUIPMENT
ELECTROCHEMICAL CELLS
EQUIPMENT
MOTORS
PULSE TECHNIQUES
SIGNALS
SPEED REGULATORS
SWITCHES
VEHICLES