Patent US6696812B2 successfully refreshed from Google Patents.
US6696812B2
Expired / Lapsed
US
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Control apparatus for electric motor
Assignee: Hitachi Ltd
•
Filing: 2001-09-20
•
Granted: 2004-02-24
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Expires: 2021-09-20
Abstract
Abstract A control apparatus controls a voltage applied to an AC motor from a power converter with a PWM signal, and has two different magnetic pole position-estimating units which estimate a rotor magnetic pole position of the AC motor, and has a switching unit which selects any one of these two kinds of magnetic pole position-estimating units.
Inventors
- 👤 Satoru Kaneko
- 👤 Ryoso Masaki
- 👤 Yasuo Morooka
- 👤 Mitsuyuki Hombu
- 👤 Hiroshi Katayama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:56
CPC Classifications
H; H02; H02P; H02P21/00; H02P21/04; B; B60; B60L; B60L15/00; B60L15/02; B60L15/025; B60L50/00; B60L50/50; B60L50/51; H02P21/14; H02P21/18; B60L2210/00; B60L2210/20; B60L2220/00; B60L2220/10; B60L2220/14; Y; Y02; Y02T; Y02T10/00; Y02T10/60; Y02T10/64; Y02T10/70; Y02T10/72; Y10; Y10S; Y10S903/00; Y10S903/902; Y10S903/903; Y10S903/904; Y10S903/915; Y10S903/916
Claims Analysis
Total Claims: 36
Claim 1
Independent Claim
125 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with at least two different magnetic pole position-estimating methods, estimates the rotor magnetic pole position of the AC motor with selectively switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor, wherein, when the at least two magnetic pole position-estimating methods are switched, a rotor magnetic pole position of the AC motor is calculated on the basis of an operating state of the AC motor in a predetermined period.
Claim 2
Dependent Claim
125 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with at least two different magnetic pole position-estimating methods, estimates the rotor magnetic pole position of the AC motor with selectively switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor, wherein, when the at least two magnetic pole position-estimating methods are switched, a rotor magnetic pole position of the AC motor is calculated on the basis of an operating state of the AC motor in a predetermined period.
Claim 3
Dependent Claim
170 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with a magnetic pole position-estimating method based on a detected current value of the AC motor detected with at least synchronizing with a carrier of the PWM signal, and a magnetic vole position-estimating method based on a detected current value of the AC motor detected in an equal potential state of the AC motor, and estimates a rotor magnetic pole position of the AC motor by switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, a rotor magnetic pole position of the AC motor is calculated on the basis of an operating state of the AC motor in a predetermined period.
Claim 4
Dependent Claim
170 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with a magnetic pole position-estimating method based on a detected current value of the AC motor detected with at least synchronizing with a carrier of the PWM signal, and a magnetic vole position-estimating method based on a detected current value of the AC motor detected in an equal potential state of the AC motor, and estimates a rotor magnetic pole position of the AC motor by switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, a rotor magnetic pole position of the AC motor is calculated on the basis of an operating state of the AC motor in a predetermined period.
Claim 5
Dependent Claim
136 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with at least two different magnetic pole position-estimating methods, estimates the rotor magnetic role position of the AC motor with selectively switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, a variation amount of the rotor magnetic pole position of the AC motor estimated by a magnetic pole position-estimating method after switching on the basis of an operating state of the AC motor in a predetermined period.
Claim 6
Dependent Claim
136 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with at least two different magnetic pole position-estimating methods, estimates the rotor magnetic role position of the AC motor with selectively switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, a variation amount of the rotor magnetic pole position of the AC motor estimated by a magnetic pole position-estimating method after switching on the basis of an operating state of the AC motor in a predetermined period.
Claim 7
Dependent Claim
136 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with at least two different magnetic pole position-estimating methods, estimates the rotor magnetic pole position of the AC motor with selectively switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, a variation amount of the rotor magnetic pole position of the AC motor estimated by a magnetic pole position-estimating method after switching on the basis of an operating state of the AC motor in a predetermined period.
Claim 8
Dependent Claim
136 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with at least two different magnetic pole position-estimating methods, estimates the rotor magnetic pole position of the AC motor with selectively switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, a variation amount of the rotor magnetic pole position of the AC motor estimated by a magnetic pole position-estimating method after switching on the basis of an operating state of the AC motor in a predetermined period.
Claim 9
Dependent Claim
153 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with a magnetic role position-estimating method based on a detected current value of the AC motor detected with at least synchronizing with a carrier of the PWM signal, and a magnetic pole position-estimating method based on a detected current value of the AC motor detected in an equal potential state of the AC motor, and estimates a rotor magnetic pole position of the AC motor by switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, current detection timing of the AC motor is changed.
Claim 10
Dependent Claim
153 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with a magnetic role position-estimating method based on a detected current value of the AC motor detected with at least synchronizing with a carrier of the PWM signal, and a magnetic pole position-estimating method based on a detected current value of the AC motor detected in an equal potential state of the AC motor, and estimates a rotor magnetic pole position of the AC motor by switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, current detection timing of the AC motor is changed.
Claim 11
Dependent Claim
108 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with at least two different magnetic pole position-estimating methods, estimates the rotor magnetic pole position of the AC motor with selectively switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, current detection timing of the AC motor is changed.
Claim 12
Dependent Claim
108 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, wherein the control apparatus for the motor estimates a rotor magnetic pole position of the AC motor with at least two different magnetic pole position-estimating methods, estimates the rotor magnetic pole position of the AC motor with selectively switching the at least two magnetic pole position-estimating methods according to an operating state of the AC motor throughout an operating range of the AC motor wherein, when the at least two magnetic pole position-estimating methods are switched, current detection timing of the AC motor is changed.
Claim 13
Dependent Claim
168 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, comprising: carrier synchronization type position-estimating means for estimating a rotor magnetic pole position of the AC motor on the basis of a detected current value of the AC motor detected by synchronizing with a carrier of the PWM signal; equal potential type position-estimating means for estimating a rotor magnetic pole position of the AC motor on the basis of a detected current value of the AC motor detected in an equal potential state of the AC motor; and means for switching magnetic pole position-estimating means from between the carrier synchronization type position-estimating means and equal potential type position-estimating means throughout an operating range of the AC motor according to an operating state of the AC motor, wherein the switching means calculates a rotor magnetic pole position of the AC motor on the basis of an operating state of the AC motor in a predetermined period.
Claim 14
Dependent Claim
168 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, comprising: carrier synchronization type position-estimating means for estimating a rotor magnetic pole position of the AC motor on the basis of a detected current value of the AC motor detected by synchronizing with a carrier of the PWM signal; equal potential type position-estimating means for estimating a rotor magnetic pole position of the AC motor on the basis of a detected current value of the AC motor detected in an equal potential state of the AC motor; and means for switching magnetic pole position-estimating means from between the carrier synchronization type position-estimating means and equal potential type position-estimating means throughout an operating range of the AC motor according to an operating state of the AC motor, wherein the switching means calculates a rotor magnetic pole position of the AC motor on the basis of an operating state of the AC motor in a predetermined period.
Claim 15
Dependent Claim
182 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, comprising: carrier synchronization type position-estimating means for estimating a rotor magnetic pole position of the AC motor on the basis of a detected current value of the AC motor detected by synchronizing with a carrier of the PWM signal; equal potential type position-estimating means for estimating a rotor magnetic role position of the AC motor on the basis of a detected current value of the AC motor detected in an equal potential state of the AC motor; and means for switching magnetic pole position-estimating means from between the carrier synchronization type position-estimating means and equal potential type position-estimating means throughout an operating range of the AC motor according to an operating state of the AC motor, wherein the switching means restricts a variation amount of a rotor magnetic pole position of the AC motor, which is estimated by magnetic pole position-estimating means after switching, on the basis of an operating state of the AC motor in a predetermined period.
Claim 16
Dependent Claim
182 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, comprising: carrier synchronization type position-estimating means for estimating a rotor magnetic pole position of the AC motor on the basis of a detected current value of the AC motor detected by synchronizing with a carrier of the PWM signal; equal potential type position-estimating means for estimating a rotor magnetic role position of the AC motor on the basis of a detected current value of the AC motor detected in an equal potential state of the AC motor; and means for switching magnetic pole position-estimating means from between the carrier synchronization type position-estimating means and equal potential type position-estimating means throughout an operating range of the AC motor according to an operating state of the AC motor, wherein the switching means restricts a variation amount of a rotor magnetic pole position of the AC motor, which is estimated by magnetic pole position-estimating means after switching, on the basis of an operating state of the AC motor in a predetermined period.
Claim 17
Dependent Claim
161 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, comprising: carrier synchronization type position-estimating means for estimating a rotor magnetic role position of the AC motor on the basis of a detected current value of the AC motor detected by synchronizing with a carrier of the PWM signal; equal potential type position-estimating means for estimating a rotor magnetic pole position of the AC motor on the basis of a detected current value of the AC motor detected in an equal potential state of the AC motor; and means for switching magnetic pole position-estimating means from between the carrier synchronization type position-estimating means and equal potential type position-estimating means throughout an operating range of the AC motor according to an operating state of the AC motor, wherein the switching means changes current detection timing of the AC motor at the time of switching the magnetic pole position-estimating means.
Claim 18
Dependent Claim
161 words
A control apparatus for a motor that controls a voltage applied to an AC motor from a power converter by a PWM signal, comprising: carrier synchronization type position-estimating means for estimating a rotor magnetic role position of the AC motor on the basis of a detected current value of the AC motor detected by synchronizing with a carrier of the PWM signal; equal potential type position-estimating means for estimating a rotor magnetic pole position of the AC motor on the basis of a detected current value of the AC motor detected in an equal potential state of the AC motor; and means for switching magnetic pole position-estimating means from between the carrier synchronization type position-estimating means and equal potential type position-estimating means throughout an operating range of the AC motor according to an operating state of the AC motor, wherein the switching means changes current detection timing of the AC motor at the time of switching the magnetic pole position-estimating means.
Claim 19
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 1 .
Claim 20
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 1 .
Claim 21
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 2 .
Claim 22
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 3 .
Claim 23
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 4 .
Claim 24
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 5 .
Claim 25
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 6 .
Claim 26
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 7 .
Claim 27
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 8 .
Claim 28
Dependent Claim
66 words
An electric vehicle, comprising: an AC motor which drives wheels; an on board power source; a power converter which converts into alternating current power direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 9 .
Claim 29
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 2 .
Claim 30
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 3 .
Claim 31
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 4 .
Claim 32
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 5 .
Claim 33
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 6 .
Claim 34
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 7 .
Claim 35
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 8 .
Claim 36
Dependent Claim
81 words
An electric vehicle, comprising: an internal combustion engine which drives either of front or rear wheels; an AC motor which drives the other wheels; an on board power supply; a power converter which converts into alternating current power the direct current power supplied from said on board power supply and supplies the alternating current power to the AC motor; and a control apparatus which controls the power converter, wherein the control apparatus is a control apparatus according to claim 9 .
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USPTO Annuity & Maintenance Windows
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| 7.5 Years (Year 8) | 2011-02-23 | 2011-08-25 | 2012-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-02-23 | 2015-08-25 | 2016-02-24 | $7700.00 | Window Closed / Lapsed |