for automatic control superimposed on human control to limit the acceleration of the vehicle, e.g. to prevent excessive motor current (electric devices for safety purposes B60L3/00)

Full Title

Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles > for automatic control superimposed on human control to limit the acceleration of the vehicle, e.g. to prevent excessive motor current (electric devices for safety purposes B60L3/00)

Child Classifications

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• B60L 15/12 with circuits controlled by relays or contactors
• B60L 15/14 with main controller driven by a servomotor (B60L15/18 takes precedence)
• B60L 15/16 with main controller driven through a ratchet mechanism (B60L15/18 takes precedence)
• B60L 15/18 without contact making and breaking, e.g. using a transductor