Kelsey-hayes Company

Other

Lester Electrical of Nebraska, Inc.

James J Dean

Ronald E Long

Charles R Langston

Mark T Bauer

James L Carrier

James R Kerlin

David R Hardy

William B Brecht

Richard D Hartz

Charles A Fain

Michael L Schukar

Jerom James Jesse

A method is provided for controlling a position of an electric dc brush motor () including the steps of supplying drive current () to drive the electric motor and calculating () a coast constant for the motor. Current through the motor is monitored () and motor speed () is determined in response to monitored motor current. Electrical current to the motor is interrupted () in response to the calculated coast constant () and motor speed when it is desired to stop the electric motor so that a brush of the motor will come to rest at a location on a commutator segment of the motor ().

Method and apparatus for controlling the position of an electric motor

A method () is provided for controlling torque of an electric motor () including the step () of supplying drive current to drive the electric motor. The speed of the electric motor is monitored () and from the monitored speed, it is determined () when the motor has reached a steady state condition. The supply current is turned off () if the monitored torque of the electric motor exceeds a predetermined value () after the electric motor has reached the steady state condition.

Method and apparatus for limiting torque in an electric drive motor

In operating a battery powered vehicle, a battery charger is located at a stationary location but the battery charger control circuit is mounted on the vehicle and powered from the DC battery of the vehicle. During a charging operation, a microprocessor within the battery charger control circuit detects that a charging operation is taking place and locks the vehicle in position and when the battery charger is disconnected, the battery charger is de-energized prior to disconnecting the electrical contact between it and the vehicle to avoid arcing. The microprocessor and its memory within the battery charger control circuit records information about the energy state of the battery and controls the battery both by measuring input and output power to the battery and by measuring the rate of change of charging current. It also controls operations such as trouble lights within the vehicle and may control a speed control circuit within the vehicle as well.

Monitoring and controlling system for battery and battery charger

Growing community of inventors

Minnesota City, MN, United States of America

James J Dean