Separately excited electric machine

Servo control system and method for a data storage device...

Solid state commutator motor with internally powered armature

Solid state switching circuit for an electromagnetic pump

Speed control circuit for a DC motor having a Hall generator

Speed control circuit for permanent magnet D-C motors

Speed control device for transistor motor

Speed regulation system for DC motors with hall generators

Speed-control drive circuit for a D.C. brushless fan motor

Spin motor control system for a hard disk assembly

Spindle drive system

Stabilized brushless motor drive circuit

Start-up method for synchronous motors

Stator winding control circuit for a brushless d.c. motor

Stepping motor

Stepping motor for electronic timepiece

Stepping motor for timepiece

Subharmonic controller for electromagnetic exciter

Switch control system

Synchronous motor control system