US6801012B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensorless control of switched reluctance electric machines
Assignee: University of Akron
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Filing: 2003-03-31
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Granted: 2004-10-05
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Expires: 2023-03-31
Abstract
Abstract A system and methodology for control of a switched reluctance electric machine comprising: a switched reluctance electric machine including a sensor generating and transmitting a sensor signal indicative of an operating characteristic; a controller operatively coupled to the switched reluctance motor and the sensor; and the controller executing a method. The method comprises: probing a selected diagnostic phase with a pulse injection process; measuring an actual operating characteristic of the switched reluctance electric machine; computing an inductance based on the actual operating characteristic and correlating the inductance with a position to formulate an estimated position; modeling the switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of the estimated position, the observer-based estimated position, and a combination thereof to formulate a selected position of the switched reluctance machine; and controlling said switched reluctance machine based on said selected position and a command.
Inventors
- 👤 Mohammad S. Islam
- 👤 Sayeed A. Mir
- 👤 Tomy Sebastian
- 👤 Iqbal Husain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:53
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/02; H02P25/08; H02P25/086; H02P25/089
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
111 words
A method for sensorless control of a switched reluctance electric machine comprising: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; and controlling said switched reluctance machine based on said selected position and a command.
Claim 2
Independent Claim
111 words
A method for sensorless control of a switched reluctance electric machine comprising: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; and controlling said switched reluctance machine based on said selected position and a command.
Claim 3
Dependent Claim
20 words
The method of claim 1 further including computing an estimated velocity for said switched reluctance machine from said estimated position.
Claim 4
Dependent Claim
21 words
The method of claim 1 further including computing an observer-based estimated velocity for said switched reluctance machine resultant from said modeling.
Claim 5
Dependent Claim
33 words
The method of claim 1 further including selecting at least one of said estimated velocity, said observer-based estimated velocity, and a combination thereof to formulate a selected velocity of said switched reluctance machine.
Claim 6
Dependent Claim
17 words
The method of claim 4 further including controlling said switched reluctance machine based on said selected velocity.
Claim 7
Dependent Claim
23 words
The method of claim 1 wherein said command comprises one or more of a current command, a voltage command, and a torque command.
Claim 8
Dependent Claim
14 words
The method of claim 1 wherein said actual operating characteristic includes voltage and current.
Claim 9
Dependent Claim
22 words
The method of claim 1 wherein said modeling comprises a look-up table based on said command and a previous modeled operating characteristic.
Claim 10
Dependent Claim
22 words
The method of claim 1 wherein said modeling comprises a recursive analytical expression based said command and said previous modeled operating characteristic.
Claim 11
Independent Claim
146 words
A system for control of a switched reluctance electric machine comprising: a switched reluctance electric machine including a sensor generating and transmitting a sensor signal indicative of an operating characteristic; a controller operatively coupled to said switched reluctance motor and said sensor; and said controller executing method: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; and controlling said switched reluctance machine based on said selected position and a command.
Claim 12
Independent Claim
146 words
A system for control of a switched reluctance electric machine comprising: a switched reluctance electric machine including a sensor generating and transmitting a sensor signal indicative of an operating characteristic; a controller operatively coupled to said switched reluctance motor and said sensor; and said controller executing method: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; and controlling said switched reluctance machine based on said selected position and a command.
Claim 13
Dependent Claim
143 words
A steering system with a switched reluctance electric motor comprising: a steerable wheel coupled to a switched reluctance motor; a controller operatively coupled to said switched reluctance motor; said controller generating command to direct said switched reluctance motor and executing a method for control: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; and controlling said switched reluctance machine based on said selected position and a command.
Claim 14
Dependent Claim
143 words
A steering system with a switched reluctance electric motor comprising: a steerable wheel coupled to a switched reluctance motor; a controller operatively coupled to said switched reluctance motor; said controller generating command to direct said switched reluctance motor and executing a method for control: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; and controlling said switched reluctance machine based on said selected position and a command.
Claim 15
Independent Claim
131 words
A system for controlling a switched reluctance motor in a vehicle steering system comprising: a means for probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; a means for measuring an actual operating characteristic of said switched reluctance electric machine; a means for computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; a means for modeling said switched reluctance electric machine to formulate an observer-based estimated position; a means for selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; and a means for controlling said switched reluctance machine based on said selected position and a command.
Claim 16
Independent Claim
131 words
A system for controlling a switched reluctance motor in a vehicle steering system comprising: a means for probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; a means for measuring an actual operating characteristic of said switched reluctance electric machine; a means for computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; a means for modeling said switched reluctance electric machine to formulate an observer-based estimated position; a means for selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; and a means for controlling said switched reluctance machine based on said selected position and a command.
Claim 17
Dependent Claim
131 words
A storage medium encoded with a machine-readable computer program code, comprising said computer program code including instructions for causing a controller to implement a method for control of a switched reluctance electric machine: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; controlling said switched reluctance machine based on said selected position and a command.
Claim 18
Dependent Claim
131 words
A storage medium encoded with a machine-readable computer program code, comprising said computer program code including instructions for causing a controller to implement a method for control of a switched reluctance electric machine: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; controlling said switched reluctance machine based on said selected position and a command.
Claim 19
Dependent Claim
124 words
A computer data signal, said data signal comprising: code configured to cause a controller to implement a method for control of a switched reluctance electric machine: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; controlling said switched reluctance machine based on said selected position and a command.
Claim 20
Dependent Claim
124 words
A computer data signal, said data signal comprising: code configured to cause a controller to implement a method for control of a switched reluctance electric machine: probing a selected diagnostic phase of said switched reluctance electric machine with a pulse injection process; measuring an actual operating characteristic of said switched reluctance electric machine; computing an inductance based on said actual operating characteristic and correlating said inductance with a position to formulate an estimated position; modeling said switched reluctance electric machine to formulate an observer-based estimated position; selecting at one of said estimated position, said observer-based estimated position, and a combination thereof to formulate a selected position of said switched reluctance machine; controlling said switched reluctance machine based on said selected position and a command.
References Cited (Backward Citations)
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