Electrical machine rotor position identification

Details Electrical machine rotor position identification Electrical machine rotor position identification

2007-06-19

2007-06-19

Donovan, Lincoln (Department: 2837)

Electricity: motive power systems

Induction motor systems

Primary circuit control

C318S132000, C318S434000, C318S254100

Reexamination Certificate

active

11174762

ABSTRACT:
A method of and system for identifying the position of magnetic poles of a rotor of a multi-phase electrical machine relative to a stator of that machine is disclosed. The method includes the steps of applying a voltage pulse to stator windings of each phase, sensing current flow in the stator windings of each phase due to the application of the voltage pulse to the respective stator windings and determining the position of the magnetic poles of the rotor relative to the stator using the sensed current flow in the stator windings of each phase. The method is characterized in that the phases of the stator windings are star-connected at a neutral junction and the voltage pulse is applied to the stator windings of each phase in parallel.

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