US6583995B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet generator and generator control
Assignee: Honeywell International Inc
•
Filing: 2000-12-21
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Granted: 2003-06-24
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Expires: 2020-12-21
Abstract
Abstract A system includes a permanent magnet generator, a dc link, an inverter coupled between the generator and the dc link, and a control for the inverter. The control regulates dc link voltage by adjusting the load angle and voltage magnitude of inverter ac terminal voltage with respect to emf of the machine.
Inventors
- 👤 Gabor Kalman
- 👤 Colin Huggett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:19
CPC Classifications
H; H02; H02J; H02J3/00; H02J3/36; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/21; H02M7/217; H02M7/219
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
49 words
A system comprising: a permanent magnet machine; a dc link; and a control for regulating dc link voltage, the control including an inverter having ac terminals coupled to the machine, the control adjusting load angle and magnitude of inverter ac terminal voltage with respect to emf of the machine.
Claim 2
Independent Claim
49 words
A system comprising: a permanent magnet machine; a dc link; and a control for regulating dc link voltage, the control including an inverter having ac terminals coupled to the machine, the control adjusting load angle and magnitude of inverter ac terminal voltage with respect to emf of the machine.
Claim 3
Dependent Claim
32 words
The system of claim 1 , wherein the machine includes stator windings coupled to the ac terminals of the inverter, the stator windings having a reactance of at least one per unit.
Claim 4
Dependent Claim
40 words
The system of claim 1 , wherein the machine includes stator windings coupled to the ac terminals of the inverter, rated current of the stator windings being at least equal to short circuit current during full-speed operation of the machine.
Claim 5
Dependent Claim
31 words
The system of claim 1 , wherein the load angle is taken as the angle between a Park vector representing machine emf and a Park vector representing the ac terminal voltage.
Claim 6
Dependent Claim
88 words
The system of claim 1 , wherein the control generates a vector-based current command as a function of load angle and a machine current amplitude reference; wherein the control generates a feedback current vector representing sensed current flowing through stator windings of the machine, the current vector and the current command being synchronous with respect to rotor angle of the machine; and wherein the control generates a voltage command for modulating the inverter, the voltage command being derived from the vector-based current command and the feedback current vector.
Claim 7
Dependent Claim
49 words
The system of claim 5 , wherein the control generates the current vector command from a commanded angle and machine current amplitude reference, the control determining the machine current amplitude reference by measuring the dc link current and deriving the amplitude in proportion to the measured dc link current.
Claim 8
Dependent Claim
58 words
The apparatus of claim 6 , wherein the commanded angle is taken as a Pl-regulated difference between sensed and commanded dc link voltage; whereby load angle is increased when the difference between commanded and sensed dc link voltage is increased; and whereby load angle is reduced when the difference between commanded and sensed dc link voltage is reduced.
Claim 9
Dependent Claim
27 words
The system of claim 6 , wherein the control includes a non-linear function generator for deriving the machine current amplitude reference from the measured dc link current.
Claim 10
Dependent Claim
21 words
The system of claim 5 , wherein the control uses the voltage command to perform space vector modulation of the inverter.
Claim 11
Independent Claim
61 words
A system comprising: a permanent magnet machine including stator windings and a rotor, rated current of the windings being at least equal to current flowing through the windings during short circuit conditions; a dc link; and means for regulating dc link voltage by adjusting load angle and voltage magnitude of inverter ac terminal voltage with respect to emf of the machine.
Claim 12
Independent Claim
61 words
A system comprising: a permanent magnet machine including stator windings and a rotor, rated current of the windings being at least equal to current flowing through the windings during short circuit conditions; a dc link; and means for regulating dc link voltage by adjusting load angle and voltage magnitude of inverter ac terminal voltage with respect to emf of the machine.
Claim 13
Dependent Claim
54 words
Apparatus for a permanent magnet machine, the apparatus comprising: an inverter; and an inverter control for regulating dc link voltage by determining load angle with respect to emf of the machine, determining magnitude of current flowing through the stator windings, and using the load angle and the determined current magnitude to modulate the inverter.
Claim 14
Dependent Claim
54 words
Apparatus for a permanent magnet machine, the apparatus comprising: an inverter; and an inverter control for regulating dc link voltage by determining load angle with respect to emf of the machine, determining magnitude of current flowing through the stator windings, and using the load angle and the determined current magnitude to modulate the inverter.
Claim 15
Dependent Claim
31 words
The apparatus of claim 11 , wherein the load angle is taken as the angle between a Park vector representing machine emf and a Park vector representing inverter ac terminal voltage.
Claim 16
Dependent Claim
82 words
The apparatus of claim 11 , wherein the control generates a vector-based current command as a function of commanded angle and a machine current amplitude reference; wherein the control generates a feedback current vector representing sensed machine current, the current vector and the current command being synchronous with respect to rotor angle of the machine; and wherein the control generates a voltage command for modulating the inverter, the voltage command being derived from the vector-based current command and the feedback current vector.
Claim 17
Dependent Claim
33 words
The apparatus of claim 13 , wherein the control determines the machine current amplitude reference by measuring the dc link current and deriving the amplitude in proportion to the measured dc link current.
Claim 18
Dependent Claim
27 words
The apparatus of claim 14 , wherein the control includes a non-linear function generator for deriving the machine current amplitude reference from the measured dc link current.
Claim 19
Dependent Claim
24 words
The apparatus of claim 13 , wherein the control determines the commanded angle as a PI-regulated difference between sensed and commanded dc link voltage.
Claim 20
Dependent Claim
20 words
The apparatus of claim 13 , the control uses the voltage command to perform space vector modulation of the inverter.
Claim 21
Independent Claim
98 words
A method of using an inverter to provide power on a dc link, the inverter receiving power from an ac generator, the method comprising: determining a load angle from measured and commanded dc link voltage; generating a vector-based current command from the load angle, the current command being synchronous with respect to the machine emf; generating a feedback current vector of ac generator current, the feedback current vector being synchronous with respect to the machine emf; generating a voltage command from the current command and the feedback current vector; and using the voltage command to modulate the inverter.
Claim 22
Independent Claim
98 words
A method of using an inverter to provide power on a dc link, the inverter receiving power from an ac generator, the method comprising: determining a load angle from measured and commanded dc link voltage; generating a vector-based current command from the load angle, the current command being synchronous with respect to the machine emf; generating a feedback current vector of ac generator current, the feedback current vector being synchronous with respect to the machine emf; generating a voltage command from the current command and the feedback current vector; and using the voltage command to modulate the inverter.
Claim 23
Dependent Claim
37 words
The method of claim 18 , wherein the vector-based current command is generated as a function of commanded angle and a machine current amplitude reference; and wherein the feedback current vector is generated from sensed machine current.
Claim 24
Dependent Claim
32 words
The method of claim 19 , wherein the machine current amplitude reference is determined by measuring the dc link current and deriving the amplitude in proportion to the measured dc link current.
Claim 25
Independent Claim
63 words
A system comprising: a permanent magnet machine; a dc link; and a control for regulating dc link voltage, the control including an inverter having ac terminals coupled to the machine, the control adjusting load angle and magnitude of inverter ac terminal voltage with respect to emf of the machine; the control further including a current loop for eliminating dc current in the inverter.
Claim 26
Independent Claim
63 words
A system comprising: a permanent magnet machine; a dc link; and a control for regulating dc link voltage, the control including an inverter having ac terminals coupled to the machine, the control adjusting load angle and magnitude of inverter ac terminal voltage with respect to emf of the machine; the control further including a current loop for eliminating dc current in the inverter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-06-23 | 2006-12-23 | 2007-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-06-23 | 2010-12-23 | 2011-06-24 | $3760.00 | Window Closed / Lapsed |
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