Speed reducing control system for a polyphase electric motor

Speed reducing control system with voltage regulation for a...

Speed regulating devices for rotary machines or the like

Speed regulator

Speed sensitive control circuit

Speed sensitive field weakening control for traction motors

Speed sensitive field weakening control for traction motors

Speed sensitive field weakening control for traction motors

Spikeless motor starting circuit

Stabilizing phase controlled ac induction motors

Stabilizing scheme for an a-c electric motor drive- system

Stabilizing system for an inverter-driven induction motor

Stall controller and triggering condition control features...

Stand-alone electrical generator, in particular for aircraft

Start-up control method and apparatus for a polyphase...

Start-up system for a synchronous motor drive

Start-up system for inverter driven motor

Starter circuit for compressor units

Starter device for a single-phase asynchronous motor

Starter device for single phase a.c. motors