Eesm control method
AssigneeVolvo Truck Corporation
InventorCharlie JÄGERHAG
Life of this patent
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Abstract
A method for field weakening implemented in an electric machine with a stator and a rotor with at least one rotor's winding, includes obtaining a field electric current actual value currently applied to the at least one rotor's winding; obtaining a direct electric current reference value; determining, based at least on the field electric current actual value, a direct electric current offset value to be added to the direct electric current reference value ; adding the direct electric current offset value to the direct electric current reference value in order to obtain an actualized direct electric current reference value.
Claims15
A method of field weakening implemented in an electric machine comprising a stator and a rotor with at least one rotor's winding, the method comprising:
- obtaining a field electric current actual value
- obtaining a field electric current reference value
- obtaining a stator electric currents reference value;
- determining, based at least on the field electric current actual value and the field electric current reference value, a field weakening stator electric currents offset value to be added to the stator electric currents reference value;
- adding the field weakening stator electric currents offset value to the stator electric currents reference value in order to obtain a field weakening actualized stator electric currents reference value.
Dependencies are inferred from the claim text.