Apparatus for measuring the frequency of a pulse-generator and n

Apparatus for removing torque ripples in a direct current motor

Apparatus for removing torque ripples in direct-current motors

Apparatus for reproducing disc record

Apparatus for synchronization of a motor

Apparatus for varying the speed of DC motors

Arrangement and method for operating a magnetically suspended, e

Arrangement for controlling the speed of a DC motor

Arrangement for controlling the speed of a motor

Automatic field control for direct current shunt motor

Automatic gain control apparatus for a motor servo system

Bidirectional motor drive circuit

Brake control system of a motor

Brake for DC brushless motor

Brake timing control method and apparatus therefor

Braking control system for an electric vehicle

Braking mode control for a chopper controlled d-c electric motor

Braking mode control for an electric traction motor

Braking system

Brushless motor speed control