US7075264B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instantaneous power floating frame controller
Assignee: Honeywell International Inc
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Filing: 2004-06-08
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Granted: 2006-07-11
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Expires: 2024-06-08
Abstract
Abstract The present invention relates to a method of controlling a power converter ( 20 ) of a synchronous machine system ( 10 ), the method comprising sampling phase-current values between the power converter ( 20 ) and the synchronous machine ( 30 ); selecting a reference frame; regulating a current vector to align with the selected reference frame, the selected reference frame having a direct-axis component and a quadrature-axis component; estimating rotor speed and position as a function of instantaneous power; adjusting the selected reference frame, based on estimated rotor position, to synchronize the selected reference frame with a magnetic axis of the rotor, thereby generating a synchronized floating frame; and applying the synchronized floating frame to control the power converter ( 20 ). The present invention also related to a power converter controlling apparatus ( 100 ) for controlling a power converter ( 20 ) of a synchronous machine system ( 10 ) without use of a machine position sensor.
Inventors
- 👤 Colin Huggett
- 👤 Zheng Wang
- 👤 George You Zhou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:18
CPC Classifications
H; H02; H02P; H02P21/00; H02P21/14; H02P21/18; H02P21/24; H02P21/26; H02P2207/00; H02P2207/05
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
122 words
A method of controlling a power converter of a synchronous machine system, said method comprising: sampling phase-current values between said power converter and said synchronous machine; selecting a reference frame; regulating a current vector to align with the reference frame, said selected reference frame having a direct-axis component and a quadrature-axis component; estimating rotor speed and position as a function of instantaneous power, said step of estimating directly deriving rotor angle as a function of instantaneous power to estimate said rotor position; adjusting said selected reference frame, based on estimated rotor position, to synchronize said selected reference frame with a magnetic axis of said rotor, thereby generating a synchronized floating frame; and applying said synchronized floating frame to control said power converter.
Claim 2
Independent Claim
122 words
A method of controlling a power converter of a synchronous machine system, said method comprising: sampling phase-current values between said power converter and said synchronous machine; selecting a reference frame; regulating a current vector to align with the reference frame, said selected reference frame having a direct-axis component and a quadrature-axis component; estimating rotor speed and position as a function of instantaneous power, said step of estimating directly deriving rotor angle as a function of instantaneous power to estimate said rotor position; adjusting said selected reference frame, based on estimated rotor position, to synchronize said selected reference frame with a magnetic axis of said rotor, thereby generating a synchronized floating frame; and applying said synchronized floating frame to control said power converter.
Claim 3
Dependent Claim
14 words
The method according to claim 1 , wherein said power converter is an inverter.
Claim 4
Dependent Claim
17 words
The method according to claim 1 , wherein said synchronous machine is a permanent magnet synchronous motor.
Claim 5
Dependent Claim
37 words
The method according to claim 1 , wherein said step of estimating rotor speed and position is based on an instantaneous power factor angle: θ=Arctg( Q/P ), where Q is imaginary power and P is real power.
Claim 6
Dependent Claim
25 words
The method according to claim 1 , wherein instantaneous power is calculated as a function of a reference voltage vector and a feedback current vector.
Claim 7
Dependent Claim
44 words
The method according to claim 1 , wherein said step of selecting a reference frame performs a Clarke transform on said phase-current values to calculate a stationary frame and performs a Park transform to generate direct-axis and quadrature-axis components in a rotating reference frame.
Claim 8
Dependent Claim
25 words
The method according to claim 1 , wherein said step of applying said synchronized floating frame to control said power converter performs motor torque control.
Claim 9
Dependent Claim
25 words
The method according to claim 1 , wherein said step of applying said synchronized floating frame to control said power converter performs magnetic flux control.
Claim 10
Independent Claim
144 words
A method of controlling a power converter of a synchronous machine drive system, said method comprising sampling phase-current values between said power converter and said synchronous machine; selecting a reference frame; regulating a current vector to align with the reference frame, said selected reference frame having a direct-axis component and a quadrature-axis component; estimating rotor speed and position as a function of instantaneous power; adjusting said selected reference frame, based on estimated rotor position, to synchronize said selected reference frame with a magnetic axis of said rotor, thereby generating a synchronized floating frame; and applying said synchronized floating frame to control said power converter, wherein said regulating step aligns said current vector with the selected reference frame, such that a direct-axis component of said current vector becomes zero; and said adjusting step aligns said selected reference frame and current vector with a voltage vector.
Claim 11
Independent Claim
144 words
A method of controlling a power converter of a synchronous machine drive system, said method comprising sampling phase-current values between said power converter and said synchronous machine; selecting a reference frame; regulating a current vector to align with the reference frame, said selected reference frame having a direct-axis component and a quadrature-axis component; estimating rotor speed and position as a function of instantaneous power; adjusting said selected reference frame, based on estimated rotor position, to synchronize said selected reference frame with a magnetic axis of said rotor, thereby generating a synchronized floating frame; and applying said synchronized floating frame to control said power converter, wherein said regulating step aligns said current vector with the selected reference frame, such that a direct-axis component of said current vector becomes zero; and said adjusting step aligns said selected reference frame and current vector with a voltage vector.
Claim 12
Dependent Claim
32 words
The method according to claim 9 , wherein said selected reference frame and current vector are aligned to said voltage vector position by minimizing an imaginary power component of said instantaneous power.
Claim 13
Dependent Claim
24 words
The method according to claim 9 , wherein said current vector is aligned with the selected reference frame by minimizing a reactive current component.
Claim 14
Dependent Claim
142 words
A power converter controlling apparatus for controlling a power converter of a synchronous machine drive system, said controlling apparatus comprising: a current controller for generating power converter command signals by: sampling phase-current values between said power converter and a synchronous machine; selecting a reference frame; regulating a current vector to align with the reference frame, said selected reference frame having a direct-axis component and a quadrature-axis component; adjusting said selected reference frame, based on estimated rotor position, to synchronize said selected reference frame with a magnetic axis of said rotor, thereby generating a synchronized floating frame; and applying said synchronized floating frame to control said power converter; and a rotor position estimator for generating said estimated rotor position as a function of instantaneous power, said rotor position estimator directly deriving rotor angle as a function of instantaneous power to estimate rotor position.
Claim 15
Dependent Claim
142 words
A power converter controlling apparatus for controlling a power converter of a synchronous machine drive system, said controlling apparatus comprising: a current controller for generating power converter command signals by: sampling phase-current values between said power converter and a synchronous machine; selecting a reference frame; regulating a current vector to align with the reference frame, said selected reference frame having a direct-axis component and a quadrature-axis component; adjusting said selected reference frame, based on estimated rotor position, to synchronize said selected reference frame with a magnetic axis of said rotor, thereby generating a synchronized floating frame; and applying said synchronized floating frame to control said power converter; and a rotor position estimator for generating said estimated rotor position as a function of instantaneous power, said rotor position estimator directly deriving rotor angle as a function of instantaneous power to estimate rotor position.
Claim 16
Dependent Claim
15 words
The controlling apparatus according to claim 12 , wherein said power converter is an inverter.
Claim 17
Dependent Claim
18 words
The controlling apparatus according to claim 12 , wherein said synchronous machine is a permanent magnet synchronous motor.
Claim 18
Dependent Claim
36 words
The controlling apparatus according to claim 12 , wherein said rotor position estimator estimates rotor position based on an instantaneous power factor angle: θ=Arctg( Q/P ), where Q is imaginary power and P is real power.
Claim 19
Dependent Claim
29 words
The controlling apparatus according to claim 12 , wherein said rotor position estimator calculates instantaneous power as a function of a reference voltage vector and a feedback current vector.
Claim 20
Dependent Claim
46 words
The controlling apparatus according to claim 12 , wherein said current controller selects a reference frame by performing a Clarke transform on said phase-current values to calculate a stationary frame and performing a Park transform to generate direct-axis and quadrature-axis components in a rotating reference frame.
Claim 21
Dependent Claim
22 words
The controlling apparatus according to claim 12 , wherein said current controller applies said synchronized floating frame to achieve motor torque control.
Claim 22
Dependent Claim
21 words
The controlling apparatus according to claim 12 , wherein said current controller applies said synchronized floating frame to control magnetic flux.
Claim 23
Dependent Claim
164 words
A power converter controlling apparatus for controlling a power converter of a synchronous machine drive system, said controlling apparatus comprising: a current controller for generating power converter command signals by: sampling phase-current values between said power converter and a synchronous machine; selecting a reference frame; regulating a current vector to align with the reference frame, said selected reference frame having a direct-axis component and a quadrature-axis component; adjusting said selected reference frame, based on estimated rotor position, to synchronize said selected reference frame with a magnetic axis of said rotor, thereby generating a synchronized floating frame; and applying said synchronized floating frame to control said power converter; and a rotor position estimator for generating said estimated rotor position as a function of instantaneous power, wherein said current controller regulates said current vector to align with the selected reference frame, such that said direct-axis component of said selected reference frame becomes zero, and aligns said selected reference frame and current vector with a voltage vector.
Claim 24
Dependent Claim
164 words
A power converter controlling apparatus for controlling a power converter of a synchronous machine drive system, said controlling apparatus comprising: a current controller for generating power converter command signals by: sampling phase-current values between said power converter and a synchronous machine; selecting a reference frame; regulating a current vector to align with the reference frame, said selected reference frame having a direct-axis component and a quadrature-axis component; adjusting said selected reference frame, based on estimated rotor position, to synchronize said selected reference frame with a magnetic axis of said rotor, thereby generating a synchronized floating frame; and applying said synchronized floating frame to control said power converter; and a rotor position estimator for generating said estimated rotor position as a function of instantaneous power, wherein said current controller regulates said current vector to align with the selected reference frame, such that said direct-axis component of said selected reference frame becomes zero, and aligns said selected reference frame and current vector with a voltage vector.
Claim 25
Dependent Claim
36 words
The controlling apparatus according to claim 20 , wherein said current controller aligns said selected reference frame and said current vector with said voltage vector position by minimizing an imaginary power component of said instantaneous power.
Claim 26
Dependent Claim
27 words
The controlling apparatus according to claim 20 , wherein said current controller aligns said current vector with the selected reference frame by minimizing a reactive current component.
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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) | 2009-07-10 | 2010-01-09 | 2010-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-07-10 | 2014-01-09 | 2014-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-07-10 | 2018-01-09 | 2018-07-11 | $7700.00 | Window Closed / Lapsed |