System and method for monitoring motor winding degradation
AssigneeAtlas Copco Airpower, Naamloze Vennootschap
InventorsHans VANDE SANDE, Tijs VAN BUGGENHOUT, Jonas DE KOONING
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Abstract
A system and method are provided for monitoring motor winding degradation of an electric machine having an electric motor driven by a variable speed drive (VSD). Measurements of phase currents and/or phase voltages are detected by sensors of the VSD while simultaneously driving the electric motor. Each measured value is processed using a filtering module to calculate symmetric components. The resulting symmetric component is used to identify the motor winding status of one or more motor windings.
Claims20
A method for monitoring motor winding degradation of an electric machine having an electric motor driven by a variable speed drive (VSD), the method comprising:
- measuring phase current values directly from the VSD;
- based on immediately preceding measured phase current values, updating symmetric components of the electric machine in real-time using a filtering module;
- and
- producing a motor winding status based on the symmetric components;
- wherein the VSD is used to both drive the electric motor and monitor the motor winding status.
A system for monitoring motor winding degradation of an electric machine, the system comprising:
- an electric motor;
- an electrical supply grid;
- and
- a variable speed drive (VSD) for driving the electric motor;
- wherein the VSD is connected to a controller having one or more storage devices that store instructions that are executable to cause the controller to:
- measure phase current values using at least two sensors of the VSD;
- based on immediately preceding measured phase current values, update symmetric components of the electric machine in real-time using a filtering module;
- and
- produce a motor winding status based on the symmetric components.
A method for monitoring motor winding degradation of an electric machine having a variable speed drive (VSD) and electric motor, the method comprising:
- measuring phase current values directly from the VSD;
- based on immediately preceding measured phase current values, updating symmetric components of the electric machine in real-time using an extended Kalman filter (EKF) or second-order generalized-integrator (SOGI) filtering module;
- wherein a new estimate of the symmetric components is generated at each new incoming measurement obtained using at least two sensors of the VSD.
Dependencies are inferred from the claim text.