US7084591B2
Expired / Lapsed
US
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Electric drive control device, electric drive control method, and program of same
Assignee: Aisin AW Co Ltd
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Filing: 2005-04-20
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Granted: 2006-08-01
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Expires: 2025-04-20
Abstract
Abstract An electric drive control device is provided with an electric machine having an asymmetrical salient pole, a current detecting portion, a phase converting device that converts the detected current into an axis current, and a current controlling device which generates a voltage command value based on the axis current and a current command value of the axis current. The current controlling device generates the voltage command value in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole. In this case, the current controlling device generates a voltage command value corresponding to the detected current and the offset angle so the electrical characteristics are the same as when an electric machine having a symmetrical salient pole is used.
Inventors
- 👤 Yasuhiko Kobayashi
- 👤 Masami Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:38
CPC Classifications
H; H02; H02P; H02P21/00; H02P21/06
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
124 words
An electric drive device, comprising: an electric machine having an asymmetrical salient pole between permanent magnets; a current detecting portion that detects a current supplied to the electric machine; a phase converting device that converts the current detected by the current detecting portion into an axis current; and a current controlling device which generates, based on the axis current and a current command value of the axis current, a voltage command value for driving the electric machine, wherein the current controlling device generates the voltage command value in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole.
Claim 2
Dependent Claim
124 words
An electric drive device, comprising: an electric machine having an asymmetrical salient pole between permanent magnets; a current detecting portion that detects a current supplied to the electric machine; a phase converting device that converts the current detected by the current detecting portion into an axis current; and a current controlling device which generates, based on the axis current and a current command value of the axis current, a voltage command value for driving the electric machine, wherein the current controlling device generates the voltage command value in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole.
Claim 3
Dependent Claim
49 words
The electric drive device according to claim 1 , further comprising a current estimating device which estimates, based on the detected current, a detected current after a predetermined period of time has passed, wherein the current controlling device generates the voltage command value based on the estimated detected current.
Claim 4
Dependent Claim
71 words
The electric drive device according to claim 1 , wherein the axis current and the current command value are generated on a converted axis that is offset by the offset angle, and the current controlling device generates the voltage command value according to a voltage equation in which the salient pole is placed at a reference position and a permanent magnet is placed in a position offset by the offset angle.
Claim 5
Dependent Claim
77 words
The electric drive device according to claim 3 , wherein the current controlling device includes a voltage drop component calculating device which calculates a voltage drop component based on a current deviation between the axis current and the current command value, and an induced voltage component calculating device which calculates an induced voltage component, and the induced voltage component calculating device compensates for a back electromotive voltage for each axis current when calculating the induced voltage component.
Claim 6
Dependent Claim
45 words
The electric drive device according to claim 4 , wherein the current estimating device estimates a detected current based on the voltage drop component, the product of the axis current and a resistance value on the converted axis, and the inverse number of an inductance.
Claim 7
Dependent Claim
71 words
The electric drive device according to claim 2 , wherein the axis current and the current command value are generated on a converted axis that is offset by the offset angle, and the current controlling device generates the voltage command value according to a voltage equation in which the salient pole is placed at a reference position and a permanent magnet is placed in a position offset by the offset angle.
Claim 8
Dependent Claim
77 words
The electric drive device according to claim 6 , wherein the current controlling device includes a voltage drop component calculating device which calculates a voltage drop component based on a current deviation between the axis current and the current command value, and an induced voltage component calculating device which calculates an induced voltage component, and the induced voltage component calculating device compensates for a back electromotive voltage for each axis current when calculating the induced voltage component.
Claim 9
Dependent Claim
45 words
The electric drive device according to claim 7 , wherein the current estimating device estimates a detected current based on the voltage drop component, the product of the axis current and a resistance value on the converted axis, and the inverse number of an inductance.
Claim 10
Dependent Claim
86 words
The electric drive device according to claim 1 , wherein the axis current and the current command value are generated on an axis established by the center of an opening angle of a permanent magnet and the center of the opening angle of the salient pole, and the current controlling device generates the voltage command value according to a voltage equation in which the permanent magnet is placed at a reference position and the salient pole is placed at a position offset by the offset angle.
Claim 11
Dependent Claim
75 words
The electric drive device according to claim 9 , wherein the current controlling device includes a voltage drop component calculating device which calculates a voltage drop component based on a current deviation between the axis current and the current command value, and an induced voltage component calculating device which calculates an induced voltage component, and the induced voltage component calculating device isolates both axis currents for each axis current when calculating the induced voltage component.
Claim 12
Dependent Claim
46 words
The electric drive device according to claim 10 , wherein the current estimating device estimates a detected current based on the voltage drop component, the product of the axis current and a resistance value, and the inverse number of an inductance represented by the offset angle.
Claim 13
Dependent Claim
86 words
The electric drive device according to claim 2 , wherein the axis current and the current command value are generated on an axis established by the center of an opening angle of a permanent magnet and the center of the opening angle of the salient pole, and the current controlling device generates the voltage command value according to a voltage equation in which the permanent magnet is placed at a reference position and the salient pole is placed at a position offset by the offset angle.
Claim 14
Dependent Claim
75 words
The electric drive device according to claim 12 , wherein the current controlling device includes a voltage drop component calculating device which calculates a voltage drop component based on a current deviation between the axis current and the current command value, and an induced voltage component calculating device which calculates an induced voltage component, and the induced voltage component calculating device isolates both axis currents for each axis current when calculating the induced voltage component.
Claim 15
Dependent Claim
46 words
The electric drive device according to claim 13 , wherein the current estimating device estimates a detected current based on the voltage drop component, the product of the axis current and a resistance value, and the inverse number of an inductance represented by the offset angle.
Claim 16
Dependent Claim
156 words
An electric drive device, comprising: an electric machine having an asymmetrical salient pole between permanent magnets; a current detecting portion that detects a current supplied to the electric machine; a phase converting device that converts the current detected by the current detecting portion into an axis current; and a current controlling device which generates, based on the axis current and a current command value of the axis current, a voltage command value for driving the electric machine, wherein the current controlling device adopts a d axis in a direction of a pair of magnetic poles of a rotor and adopts a q axis in a direction perpendicular to the d axis based on the detected current and a magnetic pole position of the rotor of the electric machine, and generates the voltage command value in accordance with an offset angle from the q axis to a current phase at which reluctance torque starts to be generated.
Claim 17
Dependent Claim
156 words
An electric drive device, comprising: an electric machine having an asymmetrical salient pole between permanent magnets; a current detecting portion that detects a current supplied to the electric machine; a phase converting device that converts the current detected by the current detecting portion into an axis current; and a current controlling device which generates, based on the axis current and a current command value of the axis current, a voltage command value for driving the electric machine, wherein the current controlling device adopts a d axis in a direction of a pair of magnetic poles of a rotor and adopts a q axis in a direction perpendicular to the d axis based on the detected current and a magnetic pole position of the rotor of the electric machine, and generates the voltage command value in accordance with an offset angle from the q axis to a current phase at which reluctance torque starts to be generated.
Claim 18
Dependent Claim
99 words
An electric drive control method, comprising: detecting a current supplied to an electric machine having an asymmetrical salient pole between permanent magnets; converting the detected current into an axis current; and generating, based on the axis current and a current command value of the axis current, a voltage command value for driving the electric machine, wherein the voltage command value is generated in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole.
Claim 19
Dependent Claim
99 words
An electric drive control method, comprising: detecting a current supplied to an electric machine having an asymmetrical salient pole between permanent magnets; converting the detected current into an axis current; and generating, based on the axis current and a current command value of the axis current, a voltage command value for driving the electric machine, wherein the voltage command value is generated in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole.
Claim 20
Dependent Claim
128 words
A program for an electric drive control method, comprising instructions, which when executed by a computer perform: operating the computer as a phase converting device that converts a current detected by a current detecting portion into an axis current; and operating the computer as a current controlling device which generates, based on the axis current and a current command value of the axis current, a voltage command value for driving an electric machine having an asymmetrical salient pole between permanent magnets, wherein the current controlling device generates the voltage command value in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole.
Claim 21
Dependent Claim
128 words
A program for an electric drive control method, comprising instructions, which when executed by a computer perform: operating the computer as a phase converting device that converts a current detected by a current detecting portion into an axis current; and operating the computer as a current controlling device which generates, based on the axis current and a current command value of the axis current, a voltage command value for driving an electric machine having an asymmetrical salient pole between permanent magnets, wherein the current controlling device generates the voltage command value in response to the detected current and an offset angle of the center of a magnetic flux density distribution occurring at the salient pole, with respect to the center of an opening angle of the salient pole.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-07-31 | 2010-01-30 | 2010-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-07-31 | 2014-01-30 | 2014-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-07-31 | 2018-01-30 | 2018-08-01 | $7700.00 | Window Closed / Lapsed |