Induction motor flux and torque control with rotor flux estimation
AssigneeAtieva, Inc.
InventorYifan TANG
Life of this patent
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Abstract
A rotor flux estimator is provided. The rotor flux estimator includes an estimation module that generates a first rotor flux vector expressed in a phase voltage reference frame and a second rotor flux vector expressed in the phase voltage reference frame, from a stator voltage vector expressed in a phase voltage reference frame, a rotational speed of a rotor, and a stator current vector expressed in the phase voltage reference frame. The estimation module includes at least one processor and the estimation module includes a rotor flux current model and a rotor flux voltage model.
Claims20
A rotor flux estimator comprising:
- an estimation module that generates a first rotor flux vector expressed in a phase voltage reference frame and a second rotor flux vector expressed in the phase voltage reference frame, from a stator voltage vector expressed in a phase voltage reference frame, a rotational speed of a rotor, and a stator current vector expressed in the phase voltage reference frame;
- the estimation module including at least one processor;
- and
- the estimation module including a rotor flux current model and a rotor flux voltage model.
A rotor flux estimator, comprising:
- a first module that generates, via application of a rotor flux current model, a first rotor flux vector expressed in a phase voltage reference frame from a stator current vector expressed in the phase voltage reference frame and a rotational speed of a rotor;
- a second module that generates, via application of a rotor flux voltage model, a second rotor flux vector expressed in the phase voltage reference frame from a stator voltage vector expressed in the phase voltage reference frame, the stator current vector expressed in the phase voltage reference frame, and an estimation correction factor;
- and
- an estimator regulator that generates the estimation correction factor from the first rotor flux vector expressed in the phase voltage reference frame and the second rotor flux vector expressed in the phase voltage reference frame, wherein at least one from a set consisting of:
- the first module, the second module, and the estimator regulator, includes a processor.
A method of estimating rotor flux, comprising:
- producing a first rotor flux vector, expressed in a phase voltage reference frame, from a stator current vector expressed in the phase voltage reference frame and a rotational speed of a rotor, via application of a rotor flux current model;
- producing a second rotor flux vector, expressed in the phase voltage reference frame, from the stator current vector expressed in the phase voltage reference frame, a stator voltage vector expressed in the phase voltage reference frame, and an estimation correction factor, via application of a rotor flux voltage model;
- and
- producing the estimation correction factor from a difference between the first rotor flux vector and the second rotor flux vector, wherein at least one method operation is executed through a processor.
Dependencies are inferred from the claim text.