Sensing PM electrical machine position

摘要

An electrical machine includes a stator having a stator winding and a secondary transformer coil. A rotor is operatively connected to rotate relative to the stator, wherein the rotor includes a plurality of embedded permanent magnets. A primary transformer coil is wound on the rotor and is operatively connected to form a rotating transformer with the secondary transformer coil. An inverter/active rectifier component is operatively connected to the stator winding and the secondary transformer coil to control the stator winding based on a sense in the secondary transformer coil received from the primary transformer coil.

主权项

1. An electrical machine system, comprising:
a stator including a stator winding and a secondary transformer coil; a rotor operatively connected to rotate relative to the stator, wherein the rotor includes a plurality of embedded permanent magnets; a primary transformer coil wound on the rotor and operatively connected to form a rotating transformer with the secondary transformer coil; and an inverter/active rectifier component operatively connected to the stator winding and the secondary transformer coil to control the stator winding based on a sense signal in the secondary transformer coil received from the primary transformer coil, wherein the inverter/active rectifier component includes a field oriented control, an adder, a pulse width modulator, and an injection quadrature generator, wherein the field oriented control is connected to the secondary transformer coil to receive the sense signal and generate a reference signal, wherein the adder is connected to both the field oriented control and the injection quadrature generator for outputting a sum of the reference signal and an injection signal from the injection quadrature generator to the pulse width modulator.