Control system for a shifting mechanism with a DC motor

Details Control system for a shifting mechanism with a DC motor Control system for a shifting mechanism with a DC motor

2005-08-23

2005-08-23

Fletcher, Marlon T. (Department: 2837)

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

C318S012000, C318S010000, C318S434000, C318S599000, C475S012000, C475S149000

Reexamination Certificate

active

06933691

ABSTRACT:
A control system controls a DC motor which operates a shifting mechanism. The control system includes switch circuit with a plurality of switches which connect terminals of the motor to a power supply. In order to limit the speed and torque, the control system operates the DC motor via pulse-width modulation so that the DC motor is alternately operated in a supply mode and in a short-circuit mode. The alternating supply and short-circuit modes result in operating states in which the motor is alternately driven and decelerated. Consequently, the speed and torque of the DC motor can be limited by the pulse-width modulation of control signals.

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