US6828750B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of controlling a motor and device therefor
Assignee: Toshiba Corp
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Filing: 2003-02-21
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Granted: 2004-12-07
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Expires: 2023-02-21
Abstract
Abstract A control device supplies an operating voltage instruction to a PWM inverter that drives a motor and, if the inferred axis of the rotor permanent magnet flux direction is defined as the dr axis, the direction orthogonal to the dr axis as the qr axis, and an axis offset by a predetermined angle from said dr axis as the γ axis, on the γ axis, the inferred γ axis voltage value which is inferred and calculated by using the detected value of the motor current and motor equivalent circuit constant and the γ axis component voltage applied to the motor are compared, and the dr axis phase difference is inferred and calculated so that the deviation of these becomes substantially zero.
Inventors
- 👤 Yosuke Nakazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:52
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/02; H02P25/08; H02P21/00; H02P21/22
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
130 words
A method of controlling a reluctance torque/permanent magnet motor which has a rotor with a protuberant magnetic polarity, comprising the steps of: comparing on a γ axis an inferred voltage of said γ axis, which is inferred and calculated by using a detected value of a motor current and a motor equivalent circuit constant and a γ axis component voltage applied to a motor, if an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and inferring and calculating a phase difference (a phase angle) of said dr axis so that a deviation thereof substantially becomes zero.
Claim 2
Independent Claim
130 words
A method of controlling a reluctance torque/permanent magnet motor which has a rotor with a protuberant magnetic polarity, comprising the steps of: comparing on a γ axis an inferred voltage of said γ axis, which is inferred and calculated by using a detected value of a motor current and a motor equivalent circuit constant and a γ axis component voltage applied to a motor, if an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and inferring and calculating a phase difference (a phase angle) of said dr axis so that a deviation thereof substantially becomes zero.
Claim 3
Dependent Claim
32 words
The method of controlling a motor according to claim 1 , wherein said phase difference δ of said γ axis and said dr axis is variable in response to a torque instruction.
Claim 4
Dependent Claim
35 words
The method of controlling a motor according to claim 1 , wherein said phase difference δ of said γ axis and said dr axis is variable in response to dr and qr axis current instructions.
Claim 5
Independent Claim
131 words
A method of controlling a reluctance torque/permanent magnet motor which has a rotor with a protuberant magnetic polarity, comprising the steps of: comparing on a γ axis an inferred current value of said γ axis, which is inferred and calculated by using a voltage that is applied to a motor and a motor equivalent circuit constant and a detected current value of said γ axis, if an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and inferring and calculating a phase difference (a phase angle) of said dr axis so that a deviation thereof substantially becomes zero.
Claim 6
Independent Claim
131 words
A method of controlling a reluctance torque/permanent magnet motor which has a rotor with a protuberant magnetic polarity, comprising the steps of: comparing on a γ axis an inferred current value of said γ axis, which is inferred and calculated by using a voltage that is applied to a motor and a motor equivalent circuit constant and a detected current value of said γ axis, if an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and inferring and calculating a phase difference (a phase angle) of said dr axis so that a deviation thereof substantially becomes zero.
Claim 7
Dependent Claim
32 words
The method of controlling a motor according to claim 4 , wherein said phase difference δ of said γ axis and said dr axis is variable in response to a torque instruction.
Claim 8
Dependent Claim
35 words
The method of controlling a motor according to claim 4 , wherein said phase difference δ of said γ axis and said dr axis is variable in response to dr and qr axis current instructions.
Claim 9
Independent Claim
128 words
A method of controlling a reluctance motor which has a rotor with a protuberant magnetic polarity, comprising the steps of: comparing on a γ axis an inferred voltage of a γ axis, which is inferred and calculated by using a detected value of a motor current and a motor equivalent circuit constant and a γ axis component voltage applied to a motor, if an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and inferring and calculating a phase difference (a phase angle) of said dr axis so that a deviation thereof substantially becomes zero.
Claim 10
Independent Claim
128 words
A method of controlling a reluctance motor which has a rotor with a protuberant magnetic polarity, comprising the steps of: comparing on a γ axis an inferred voltage of a γ axis, which is inferred and calculated by using a detected value of a motor current and a motor equivalent circuit constant and a γ axis component voltage applied to a motor, if an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and inferring and calculating a phase difference (a phase angle) of said dr axis so that a deviation thereof substantially becomes zero.
Claim 11
Independent Claim
129 words
A method of controlling a reluctance motor which has a rotor with a protuberant magnetic polarity, comprising the steps of: comparing on a γ axis an inferred current value of said γ axis, which is inferred and calculated by using a voltage that is applied to a motor and a motor equivalent circuit constant and a detected current value of said γ axis, if an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and inferring and calculating a phase difference (a phase angle) of said dr axis so that a deviation thereof substantially becomes zero.
Claim 12
Independent Claim
129 words
A method of controlling a reluctance motor which has a rotor with a protuberant magnetic polarity, comprising the steps of: comparing on a γ axis an inferred current value of said γ axis, which is inferred and calculated by using a voltage that is applied to a motor and a motor equivalent circuit constant and a detected current value of said γ axis, if an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and inferring and calculating a phase difference (a phase angle) of said dr axis so that a deviation thereof substantially becomes zero.
Claim 13
Dependent Claim
143 words
A motor control device that supplies an operating voltage instruction to an inverter section for driving a motor, comprising: means for comparing on a γ axis, an inferred γ axis voltage value which is inferred and calculated by using a detected value of a motor current and a motor equivalent circuit constant and a γ axis component voltage applied to said motor, where an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and means for inferring and calculating said dr axis phase difference so that a deviation of said γ axis inferred voltage value and said γ axis component voltage obtained by said means for comparing becomes substantially zero.
Claim 14
Dependent Claim
143 words
A motor control device that supplies an operating voltage instruction to an inverter section for driving a motor, comprising: means for comparing on a γ axis, an inferred γ axis voltage value which is inferred and calculated by using a detected value of a motor current and a motor equivalent circuit constant and a γ axis component voltage applied to said motor, where an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and means for inferring and calculating said dr axis phase difference so that a deviation of said γ axis inferred voltage value and said γ axis component voltage obtained by said means for comparing becomes substantially zero.
Claim 15
Dependent Claim
144 words
A motor control device that supplies an operating voltage instruction to an inverter section for driving a motor, comprising: means for comparing, on a γ axis, an inferred γ axis current value which is inferred and calculated by using a voltage applied to said motor and motor equivalent circuit constant and a detected current value of said γ axis, where an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and means for inferring and calculating a dr axis phase difference so that a deviation of said inferred current value of said γ axis and a detected value of said γ axis obtained by said means for comparing becomes substantially zero.
Claim 16
Dependent Claim
144 words
A motor control device that supplies an operating voltage instruction to an inverter section for driving a motor, comprising: means for comparing, on a γ axis, an inferred γ axis current value which is inferred and calculated by using a voltage applied to said motor and motor equivalent circuit constant and a detected current value of said γ axis, where an inferred axis of a rotor permanent magnet flux direction is defined as a dr axis, a direction orthogonal to said dr axis as a qr axis, and an axis offset by a predetermined angle from said dr axis as said γ axis; and means for inferring and calculating a dr axis phase difference so that a deviation of said inferred current value of said γ axis and a detected value of said γ axis obtained by said means for comparing becomes substantially zero.
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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) | 2007-12-07 | 2008-06-07 | 2008-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-12-07 | 2012-06-07 | 2012-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-12-07 | 2016-06-07 | 2016-12-07 | $7700.00 | Window Closed / Lapsed |