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US 11,557,997 B2Granted
Method for determining the magnetic flux of an electric machine
AssigneeIfp Energies Nouvelles
InventorsHoai-Nam Nguyen, Gianluca Zito
Life of this patent
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Abstract
The present invention relates to a method of determining the magnetic flux φ of an electric machine, based on measurements (MES) of currents and voltages in the phases of the electric machine, on a dynamic model (MOD) of the magnetic flux and on an adaptive Kalman filter (KAL).
Claims18
A method of determining magnetic flux of an electrical machine,
- the electrical machine comprising a rotor and a stator, the stator comprising windings connected to electrical phases, comprising steps of:
- a) measuring a current and a voltage in the electrical phases of the electrical machine;
- b) determining electrical rotational speed of the rotor as a function of mechanical rotational speed of the rotor;
- c) constructing a dynamic model of the magnetic flux of the electrical machine, the dynamic model of the magnetic flux connecting the magnetic flux to the current and to the voltage of the electrical phases of the electrical machine and to the electrical rotational speed of the rotor;
- and
- d) determining the magnetic flux φ by applying an adaptive Kalman filter to the dynamic magnetic flux model, the dynamic magnetic flux model being applied to the current and voltage measurements, to the determined electrical rotational speed, and to adapt a noise covariance matrix as function of the rotational speed of the electrical machine.
3 more elements
Dependencies are inferred from the claim text.