Position sensorless permanent magnet electrical machine

摘要

A new and useful electrical machine (102) includes a stator including a stator winding (104) and a primary transformer coil (106). A rotor (108) is operatively connected to rotate relative to the stator, wherein the rotor includes a plurality of embedded permanent magnets (PM). An excitation coil (110) is wound on the rotor and is operatively connected to form a rotating transformer with a primary transformer coil (106). An inverter/active rectifier component (112) is operatively connected to the stator winding and the primary transformer coil to control the stator winding based on excitation in the stator winding from the excitation coil and permanent magnets.The inverter/active rectifier component can be configured to direct external power through the stator to drive the rotor in a motoring mode and to deliver power from the stator to an external DC load in a generate mode. An AC power source (114) can be operatively connected between the inverter/active rectifier component and the primary transformer coil to control power to the rotating transformer. An RC damper (116) can be connected in parallel with the excitation coil.