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US 2015/0028792 A1Published application
Induction motor flux and torque control
AssigneeAtieva, Inc.
InventorYifan TANG
Life of this patent
Estimating the term…
Abstract
An induction motor controller is provided. The induction motor controller includes a first module that derives a commanded stator voltage vector, in a stator flux reference frame, via a rotor flux regulator loop and a torque regulator loop, which process at least partially in the stator flux reference frame. The induction motor controller includes a second module that processes the commanded stator voltage vector to produce AC (alternating current) power for an induction motor.
Claims21
An induction motor controller, comprising:
- a first module that derives a commanded stator voltage vector, in a stator flux reference frame, via a rotor flux regulator loop and a torque regulator loop, which process at least partially in the stator flux reference frame;
- and
- a second module that processes the commanded stator voltage vector to produce AC (alternating current) power for an induction motor.
An induction motor controller, comprising:
- a torque regulator that processes in a stator flux reference frame a commanded torque, a torque, a commanded rotor flux, and a rotational speed of a rotor of an induction motor, to produce a commanded stator voltage projected onto a quadrature axis in the stator flux reference frame;
- a rotor flux regulator that processes in the stator flux reference frame the commanded rotor flux and a rotor flux, to produce the commanded stator voltage projected onto a direct axis in the stator flux reference frame;
- and
- a stator flux reference frame to phase voltage reference frame vector rotation module that applies a stator flux angle to transform the commanded stator voltage, as projected onto the direct axis and the quadrature axis, from a first vector expressed in the stator flux reference frame to a second vector expressed in the phase voltage reference frame.
1 more element
A method of controlling an induction motor, comprising:
- generating a stator voltage vector, in a stator flux reference frame, the generating including,
- generating a quadrature axis projection of a commanded stator voltage vector expressed in the stator flux reference frame from a commanded torque, a torque, a commanded rotor flux, and a rotational speed of a rotor of the induction motor;
- and
- generating a direct axis projection of the commanded stator voltage vector expressed in the stator flux reference frame from the commanded rotor flux and a rotor flux, wherein the stator voltage vector, in the stator flux reference frame, includes the direct axis projection of the commanded stator voltage vector and the quadrature axis projection of the commanded stator voltage vector;
- transforming the stator voltage vector from the stator flux reference frame to a phase voltage reference frame;
- and
- producing alternating current (AC) power for an induction motor, from the stator voltage vector of the phase voltage reference frame, wherein at least one step of the method is performed by a processor.
4 more elements
Dependencies are inferred from the claim text.