Controller for rotary machine
US-2024063746-A1 · Feb 22, 2024 · US
Motor control system
US12456942B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12456942-B2 |
| Application number | US-202418407603-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 9, 2024 |
| Priority date | Jan 20, 2023 |
| Publication date | Oct 28, 2025 |
| Grant date | Oct 28, 2025 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A motor control system disclosed herein controls operation of a motor having a stator having one of an armature winding and a field winding and a rotor having the other of the armature winding and the field winding. The motor control system includes a first inverter that supplies an armature current to the armature winding, a second inverter that supplies a field current to the field winding, and a control device that controls the operations of the first inverter and the second inverter. The control device is configured to be capable of executing harmonic superimposition processing for at least partially canceling harmonics appearing in the motor by superimposing harmonic currents on the field current based on the motor operation index indicating the operation of the motor.
First claim
Opening claim text (preview).
What is claimed is: 1 . A motor control system for controlling operation of a motor, wherein: the motor includes a stator including one of an armature winding and a field winding, and a rotor including another of the armature winding and the field winding; the motor control system includes a first inverter that supplies an armature current to the armature winding, a second inverter that supplies a field current to the field winding, and a control device that controls operation of the first inverter and the second inverter; and the control device is configured to execute harmonic superimposition processing that at least partially cancels out harmonics appearing in the motor by superimposing a harmonic current on the field current, based on a motor operation index that indicates the operation of the motor. 2 . The motor control system according to claim 1 , wherein the control device stores a waveform table in which is described a waveform of the harmonic current to be superimposed on the field current, in association with the motor operation index. 3 . The motor control system according to claim 1 , wherein the control device executes the harmonic superimposition processing when the motor operation index is within a predetermined range, and does not execute the harmonic superimposition processing when the motor operation index is not within the predetermined range. 4 . The motor control system according to claim 1 , wherein: the stator includes the armature winding; the rotor includes the field winding; and the armature winding is a three-phase winding. 5 . The motor control system according to claim 1 , wherein the motor operation index includes at least one of a rotation speed of the rotor and a torque command value to the motor.
Assignees
Inventors
Classifications
- H02P27/05Primary
using AC supply for both the rotor and the stator circuits, the frequency of supply to at least one circuit being variable · CPC title
specially adapted for damping motor oscillations, e.g. for reducing hunting · CPC title
Arrangements for controlling torque ripple, e.g. providing reduced torque ripple · CPC title
- H02P29/50Primary
Reduction of harmonics · CPC title
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Frequently asked questions
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- What does patent US12456942B2 cover?
- A motor control system disclosed herein controls operation of a motor having a stator having one of an armature winding and a field winding and a rotor having the other of the armature winding and the field winding. The motor control system includes a first inverter that supplies an armature current to the armature winding, a second inverter that supplies a field current to the field winding, a…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02P27/05. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Oct 28 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).