Patent US6407531B1 successfully refreshed from Google Patents.
US6407531B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and system for controlling a synchronous machine over full operating range
Assignee: Borgwarner US Technologies LLC
•
Filing: 2001-01-09
•
Granted: 2002-06-18
•
Expires: 2021-01-09
Abstract
Abstract System and method for controlling a synchronous machine are provided. The method allows for calculating a stator voltage index. The method further allows for relating the magnitude of the stator voltage index against a threshold voltage value. An offset signal is generated based on the results of the relating step. A respective state of operation of the machine is determined. The offset signal is processed based on the respective state of the machine.
Inventors
- 👤 James E. Walters
- 👤 Fani S. Gunawan
- 👤 Yanhong Xue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:03
CPC Classifications
H; H02; H02P; H02P6/00; H02P6/08; H02P6/085
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
62 words
A method for controlling a synchronous machine, the method comprising: calculating a stator voltage index; relating the magnitude of the stator voltage index against a threshold voltage value; generating an offset signal based on the results of the relating step; determining a respective state of operation of the machine; and processing the offset signal based on the respective state of the machine.
Claim 2
Independent Claim
62 words
A method for controlling a synchronous machine, the method comprising: calculating a stator voltage index; relating the magnitude of the stator voltage index against a threshold voltage value; generating an offset signal based on the results of the relating step; determining a respective state of operation of the machine; and processing the offset signal based on the respective state of the machine.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein the determining step comprises determining the presence of a field-weakened state, or the presence of a non-field-weakened state.
Claim 4
Dependent Claim
42 words
The method of claim 2 wherein the processing step comprises applying the value of any generated offset signal to adjust the value of a direct component of a stator current command when the determining step indicates the presence of the field-weakened state.
Claim 5
Dependent Claim
49 words
The method of claim 3 wherein the processing step comprises setting the value of any generated offset signal to a sufficiently small value to leave the value of the direct component of the stator current command substantially unchanged when the determining step indicates the presence of the non-field-weakened state.
Claim 6
Dependent Claim
20 words
The method of claim 2 wherein the determining step comprises determining transitioning from the non-field-weakened state to the field-weakened state.
Claim 7
Dependent Claim
42 words
The method of claim 5 wherein the processing step comprises applying the value of any generated offset signal to adjust the value of a direct component of a stator current command when the determining step indicates the presence of said state transition.
Claim 8
Dependent Claim
20 words
The method of claim 5 wherein the determining step comprises determining transitioning from the field-weakened state to the non-field-weakened state.
Claim 9
Dependent Claim
49 words
The method of claim 7 wherein the processing step comprises setting the value of any generated offset signal to a sufficiently small value to leave the value of the direct component of the stator current command substantially unchanged when the determining step indicates the presence of said state transition.
Claim 10
Independent Claim
153 words
A method for controlling a synchronous machine, the method comprising: calculating a stator voltage index; relating the magnitude of the stator voltage index against a threshold voltage value; generating a parameter value corresponding to a direct component of a stator current command based on the results of the relating step, said parameter value constituting a first value of said component of stator current command; providing memory configured to store a respective parameter value corresponding to the stator current command based on one or more operational signals of the machine, said parameter value constituting a second value of said component of stator current command; determining a respective state of operation of the machine; and generating a switching signal based on the respective state of the machine, said switching signal used for controlling which of the first and second parameter values of said component of stator current command is to be used for machine control.
Claim 11
Independent Claim
153 words
A method for controlling a synchronous machine, the method comprising: calculating a stator voltage index; relating the magnitude of the stator voltage index against a threshold voltage value; generating a parameter value corresponding to a direct component of a stator current command based on the results of the relating step, said parameter value constituting a first value of said component of stator current command; providing memory configured to store a respective parameter value corresponding to the stator current command based on one or more operational signals of the machine, said parameter value constituting a second value of said component of stator current command; determining a respective state of operation of the machine; and generating a switching signal based on the respective state of the machine, said switching signal used for controlling which of the first and second parameter values of said component of stator current command is to be used for machine control.
Claim 12
Dependent Claim
24 words
The method of claim 9 wherein the determining step comprises determining the presence of a field-weakened state, or the presence of a non-field-weakened state.
Claim 13
Dependent Claim
33 words
The method of claim 10 further comprising providing a switch responsive to the switching signal to pass one of the first and second parameter values based on the respective state of the machine.
Claim 14
Dependent Claim
23 words
The method of claim 11 wherein the first parameter value is passed when the determining step indicates the presence of the field-weakened state.
Claim 15
Dependent Claim
23 words
The method of claim 11 wherein the second parameter value is passed when the determining step indicates the presence of the non-field-weakened state.
Claim 16
Dependent Claim
21 words
The method of claim 9 wherein the one or more operational signals comprise a torque command signal and rotor speed signal.
Claim 17
Independent Claim
84 words
A system for controlling a synchronous machine, the system comprising: a calculating module configured to calculate a stator voltage index; a comparator configured to relate the magnitude of the stator voltage index against a threshold voltage value; a generating module configured to generate an offset signal based on the results of the comparator; a determining module configured to determine a respective state of operation of the machine; and a processor configured to process the offset signal based on the respective state of the machine.
Claim 18
Independent Claim
84 words
A system for controlling a synchronous machine, the system comprising: a calculating module configured to calculate a stator voltage index; a comparator configured to relate the magnitude of the stator voltage index against a threshold voltage value; a generating module configured to generate an offset signal based on the results of the comparator; a determining module configured to determine a respective state of operation of the machine; and a processor configured to process the offset signal based on the respective state of the machine.
Claim 19
Dependent Claim
26 words
The system of claim 15 wherein the determining module is configured to determine the presence of a field-weakened state, or the presence of a non-field-weakened state.
Claim 20
Dependent Claim
43 words
The system of claim 16 wherein the processor is configured to apply the value of any generated offset signal to adjust the value of a direct component of a stator current command when the determining module indicates the presence of the field-weakened state.
Claim 21
Dependent Claim
50 words
The system of claim 17 wherein the processor is configured to set the value of any generated offset signal to a sufficiently small value to leave the value of the direct component of the stator current command substantially unchanged when the determining module indicates the presence of the non-field-weakened state.
Claim 22
Dependent Claim
23 words
The system of claim 16 wherein the determining module is further configured to determine transitioning from the non-field-weakened state to the field-weakened state.
Claim 23
Dependent Claim
44 words
The system of claim 19 wherein the processor is further configured to apply the value of any generated offset signal to adjust the value of a direct component of a stator current command when the determining step indicates the presence of said state transition.
Claim 24
Dependent Claim
23 words
The system of claim 19 wherein the determining module is further configured to determine transitioning from the field-weakened state to the non-field-weakened state.
Claim 25
Dependent Claim
51 words
The system of claim 21 wherein the processor is further configured to set the value of any generated offset signal to a sufficiently small value to leave the value of the direct component of the stator current command substantially unchanged when the determining module indicates the presence of said state transition.
Claim 26
Independent Claim
177 words
A system for controlling a synchronous machine, the system comprising: a calculating module configured to calculate a stator voltage index; a comparator configured to relate the magnitude of the stator voltage index against a threshold voltage value; a generating module configured to generate a parameter value corresponding to a direct component of a stator current command based on the results of the relating module, said parameter value constituting a first value of said component of stator current command; memory configured to store a respective parameter value corresponding to the stator current command based on one or more operational signals of the machine, said parameter value constituting a second value of said component of stator current command; a determining module configured to determine a respective state of operation of the machine; and a switching control unit configured to generate a switching signal based on the respective state of the machine, said switching signal used for controlling which of the first and second parameter values of said component of stator current command is to be used for machine control.
Claim 27
Independent Claim
177 words
A system for controlling a synchronous machine, the system comprising: a calculating module configured to calculate a stator voltage index; a comparator configured to relate the magnitude of the stator voltage index against a threshold voltage value; a generating module configured to generate a parameter value corresponding to a direct component of a stator current command based on the results of the relating module, said parameter value constituting a first value of said component of stator current command; memory configured to store a respective parameter value corresponding to the stator current command based on one or more operational signals of the machine, said parameter value constituting a second value of said component of stator current command; a determining module configured to determine a respective state of operation of the machine; and a switching control unit configured to generate a switching signal based on the respective state of the machine, said switching signal used for controlling which of the first and second parameter values of said component of stator current command is to be used for machine control.
Claim 28
Dependent Claim
26 words
The system of claim 23 wherein the determining module is configured to determine the presence of a field-weakened state, or the presence of a non-field-weakened state.
Claim 29
Dependent Claim
32 words
The system of claim 23 further comprising a switch responsive to the switching signal to pass one of the first and second parameter values based on the respective state of the machine.
Claim 30
Dependent Claim
23 words
The system of claim 25 wherein the first parameter value is passed when the determining module indicates the presence of the field-weakened state.
Claim 31
Dependent Claim
23 words
The method of claim 25 wherein the second parameter value is passed when the determining module indicates the presence of the non-field-weakened state.
Claim 32
Dependent Claim
22 words
The system of claim 23 wherein the one or more operational signals comprise a torque command signal and a rotor speed signal.
References Cited (Backward Citations)
US3590352A
Cited
US3656038A
Cited
US3735226A
Cited
US4090119A
Cited
US4206389A
Cited
US4131832A
Cited
US4260937A
Cited
US4264846A
Cited
US4385266A
Cited
US4675585A
Cited
US4677360A
Cited
US4968925A
Cited
US5339012A
Cited
US5032771A
Cited
US6008614A
Cited
US5455473A
Cited
US5569995A
Cited
US5825113A
Cited
US6014006A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-06-17 | 2005-12-17 | 2006-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-06-17 | 2009-12-17 | 2010-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-06-17 | 2013-12-17 | 2014-06-18 | $7700.00 | Window Closed / Lapsed |