Patent US6320349B1 successfully refreshed from Google Patents.
US6320349B1
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Method of estimating field pole position of synchronous motor, motor controller, and electric vehicle
Assignee: Individual
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Filing: 1999-08-10
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Granted: 2001-11-20
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Expires: 2019-08-10
Abstract
Abstract A power corresponding to an A/C voltage command id 1 * is applied in the d-axis direction of rotational coordinates of a stopped synchronous motor via a current control unit, a three-phase converting unit, and a power converter. Further, by using “an amplitude value of a current iq′ in the q-axis direction of the rotational coordinates generated in response to the A/C voltage command id 1 *” which is fed back and detected via a current detector and a dq converting unit, a field pole position estimation value θ{circumflex over ( )} is converged. The field pole position is estimated by using the converged field pole position estimation value θ{circumflex over ( )} as a true value of the field pole position θ of the synchronous motor.
Inventors
- 👤 Satoru Kaneko
- 👤 Ryoso Masaki
- 👤 Yuusuke Takamoto
- 👤 Taizou Miyazaki
- 👤 Sanshiro Obara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:35
CPC Classifications
B; B60; B60L; B60L15/00; B60L15/02; B60L15/025; H; H02; H02P; H02P21/00; H02P21/14; H02P21/18; B60L2220/00; B60L2220/10; B60L2220/14; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
103 words
A method of estimating a field pole position of a synchronous motor for applying an alternating current signal to the current command value in the d-axis direction of rotational coordinates of a synchronous motor, and executing a converging calculation of a field pole position estimation value of the synchronous motor from a current signal in the q-axis direction of the rotational coordinates generated by the application of the alternating current signal, thereby estimating the field pole position of the asynchronous motor, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
Claim 2
Independent Claim
103 words
A method of estimating a field pole position of a synchronous motor for applying an alternating current signal to the current command value in the d-axis direction of rotational coordinates of a synchronous motor, and executing a converging calculation of a field pole position estimation value of the synchronous motor from a current signal in the q-axis direction of the rotational coordinates generated by the application of the alternating current signal, thereby estimating the field pole position of the asynchronous motor, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
Claim 3
Dependent Claim
123 words
A motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
Claim 4
Dependent Claim
123 words
A motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
Claim 5
Dependent Claim
44 words
The motor controller according to claim 2 , wherein the field pole position estimating means estimates the field pole position polarity from a state of a pulse (Pns) whose waveform is inverted each time the synchronous motor turns at an electrical angle of 180°.
Claim 6
Dependent Claim
69 words
The motor controller according to claim 2 , wherein the field pole position estimating means applies a current voltage command or a current command having a predetermined bias component in the d-axis direction of the rotational coordinates to the synchronous motor and discriminates the field pole position polarity from the magnitude of an amplitude of a motor current (I 1 ) flowed in response to the current voltage command.
Claim 7
Dependent Claim
18 words
The motor controller according to claim 3 , wherein an electric vehicle is controlled by the motor controller.
Claim 8
Dependent Claim
18 words
The motor controller according to claim 4 , wherein an electric vehicle is controlled by the motor controller.
Claim 9
Dependent Claim
18 words
The motor controller according to claim 2 , wherein an electric vehicle is controlled by the motor controller.
Claim 10
Dependent Claim
130 words
An electric vehicle comprising a battery and a motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
Claim 11
Dependent Claim
130 words
An electric vehicle comprising a battery and a motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
Claim 12
Dependent Claim
131 words
An electric vehicle comprising a current converter and a motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
Claim 13
Dependent Claim
131 words
An electric vehicle comprising a current converter and a motor controller for controlling a synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis component of motor current.
Claim 14
Dependent Claim
131 words
An electric vehicle comprising a synchronous motor and a motor controller for controlling the synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis, component of motor current.
Claim 15
Dependent Claim
131 words
An electric vehicle comprising a synchronous motor and a motor controller for controlling the synchronous motor by using a field pole position estimation value generated by a field pole position estimating means which estimates the field pole position, wherein the field pole position estimating means applies an alternating current signal in the current command of a d-axis direction of rotational coordinates of the synchronous motor, executes a converging calculation of the field pole position estimation value by using a current signal in the q-axis direction of the rotational coordinates generated in response to the application of the alternating current signal, and generates the resultant field pole position estimation value, wherein said current signal in the q-axis direction of the rotational coordinates is generated by converting a q-axis, component of motor current.
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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) | 2004-11-19 | 2005-05-21 | 2005-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-19 | 2009-05-21 | 2009-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-19 | 2013-05-21 | 2013-11-20 | $7700.00 | Window Closed / Lapsed |