Electric power source apparatus
US-12434724-B2 · Oct 7, 2025 · US
Rotary machine control device and electric power steering device
US12565259B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12565259-B2 |
| Application number | US-202118269381-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 16, 2021 |
| Priority date | Apr 16, 2021 |
| Publication date | Mar 3, 2026 |
| Grant date | Mar 3, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A rotary machine control device includes: a first inverter that applies an alternating-current voltage to three-phase windings of a first system included in a rotary machine, according to a first direct-current voltage; a second inverter that applies an alternating-current voltage to three-phase windings of a second system included in the rotary machine; a first controller that generates a command value of a d-axis electric current of the first system, according to a direct-current voltage minimum value and a command value of the rotary machine, the direct-current voltage minimum value being a lower one of the first direct-current voltage and the second direct-current voltage, that generates a command value of a q-axis electric current of the first system, according to the direct-current voltage minimum value and the command value of the d-axis electric current of the first system, and that controls the first inverter, according to the command value of the d-axis electric current of the first system and the command value of the q-axis electric current of the first system; and a second controller that generates a command value of a d-axis electric current of the second system, according to the direct-current voltage minimum value and the command value of the rotary machine, that generates a command value of a q-axis electric current of the second system, according to the direct-current voltage minimum value and the command value of the d-axis electric current of the second system, and that controls the second inverter, according to the command value of the d-axis electric current of the second system and the command value of the q-axis electric current of the second system.
First claim
Opening claim text (preview).
The invention claimed is: 1 . A rotary machine control device comprising: a first inverter that applies an alternating-current voltage to three-phase windings of a first system included in a rotary machine, according to a first direct-current voltage that has been output from a first direct-current power supply; a second inverter that applies an alternating-current voltage to three-phase windings of a second system included in the rotary machine, according to a second direct-current voltage that has been output from a second direct-current power supply; a first controller that generates a command value of a d-axis electric current of the first system, according to a direct-current voltage minimum value and a command value of the rotary machine, the direct-current voltage minimum value being a lower one of the first direct-current voltage and the second direct-current voltage, that also generates a command value of a q-axis electric current of the first system, according to the direct-current voltage minimum value and the command value of the d-axis electric current of the first system, and that outputs a first control signal for causing the first inverter to apply the alternating-current voltage to the three-phase windings of the first system, according to the command value of the d-axis electric current of the first system and the command value of the q-axis electric current of the first system that have been generated; and a second controller that generates a command value of a d-axis electric current of the second system, according to the direct-current voltage minimum value and the command value of the rotary machine, that also generates a command value of a q-axis electric current of the second system, according to the direct-current voltage minimum value and the command value of the d-axis electric current of the second system, and that outputs a second control signal for causing the second inverter to apply the alternating-current voltage to the three-phase windings of the second system, according to the command value of the d-axis electric current of the second system and the command value of the q-axis electric current of the second system that have been generated. 2 . The rotary machine control device according to claim 1 , wherein the first controller limits either the command value of the d-axis electric current of the first system or the command value of the q-axis electric current of the first system, according to an integrated value of a first electric current, that is an electric current that flows through the three-phase windings of the first system, and the second controller limits either the command value of the d-axis electric current of the second system or the command value of the q-axis electric current of the second system, according to an integrated value of a second electric current, that is an electric current that flows through the three-phase windings of the second system. 3 . The rotary machine control device according to claim 2 , wherein the first controller calculates the integrated value of the first electric current, according to the command value of the d-axis electric current of the first system and the command value of the q-axis electric current of the first system, and limits either the command value of the d-axis electric current of the first system or the command value of the q-axis electric current of the first system, according to the integrated value of the first electric current that has been calculated, and the second controller calculates the integrated value of the second electric current, according to the command value of the d-axis electric current of the second system and the command value of the q-axis electric current of the second system, and limits either the command value of the d-axis electric current of the second system or the command value of the q-axis electric current of the second system, according to the integrated value of the second electric current that has been calculated. 4 . The rotary machine control device according to claim 2 , further comprising: a first electric current detector that detects the electric current that flows through the three-phase winding of the first system; and a second electric current detector that detects the electric current that flows through the three-phase winding of the second system, wherein the first controller calculates the integrated value of the first electric current, according to a detected electric current that has been detected by the first electric current detector, and limits either the command value of the d-axis electric current of the first system or the command value of the q-axis electric current of the first system, according to the integrated value of the first electric current that has been calculated, and the second controller calculates the integrated value of the second electric current, according to a detected electric current that has been detected by the second electric current detector, and limits either the command value of the d-axis electric current of the second system or the command value of the q-axis electric current of the second system, according to the integrated value of the second electric current that has been calculated. 5 . The rotary machine control device according to claim 1 , wherein the first controller limits either the command value of the d-axis electric current of the first system or the command value of the q-axis electric current of the first system, according to an integrated value of a larger direct-current part electric current out of a first direct-current part electric current and a second direct-current part electric current, the first direct-current part electric current being an electric current output from the first direct-current power supply to the first inverter, the second direct-current part electric current being an electric current output from the second direct-current power supply to the second inverter, and the second controller limits either the command value of the d-axis electric current of the second system or the command value of the q-axis electric current of the second system, according to the integrated value of the larger direct-current part electric current. 6 . The rotary machine control device according to claim 5 , wherein the first controller determines the larger direct-current part electric current, according to the second direct-current part electric current that has been estimated, according to the first direct-current voltage, the second direct-current voltage, and the first direct-current part electric current, and the second controller determines the larger direct-current part electric current, according to the first direct-current part electric current that has been estimated, according to the second direct-current voltage, the first direct-current voltage, and the second direct-current part electric current. 7 . The rotary machine control device according to claim 1 , wherein the first controller corrects the command value of the q-axis electric current of the first system to decrease, in a case where a first voltage command value, that is a command value for a voltage applied to the three-phase windings of the first system, is larger than a comparison value according to the direct-current voltage minimum value, and corrects the command value of the q-axis electric current of the first system to increase, in a case where the first voltage command value is smaller than the comparison value, and the second controller corrects the command value of the q-axis electric current of the second system to decrease, in a case where a second voltage command value, that is a command value for a voltage applied to the three-phase windings of the second system, is larger than the
Assignees
Inventors
Classifications
characterised by constructional features, e.g. common housing for motor and gear box · CPC title
Arrangements for controlling current (H02P6/10 takes precedence) · CPC title
Current control, e.g. using a current control loop · CPC title
wherein the PWM mode is adapted on the running conditions of the motor, e.g. the switching frequency · CPC title
monitoring the steering system, e.g. failures · CPC title
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Frequently asked questions
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- What does patent US12565259B2 cover?
- A rotary machine control device includes: a first inverter that applies an alternating-current voltage to three-phase windings of a first system included in a rotary machine, according to a first direct-current voltage; a second inverter that applies an alternating-current voltage to three-phase windings of a second system included in the rotary machine; a first controller that generates a comm…
- Who is the assignee on this patent?
- Mitsubishi Electric Corp
- What technology area does this patent fall under?
- Primary CPC classification B62D5/0463. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 03 2026 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 9 related publications on this page (citations in our corpus or others sharing the same primary CPC).