US6621721B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Direct conversion programmable power source controller: three-phase input with programmable single-phase output
Assignee: Boeing Co
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Filing: 2002-06-14
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Granted: 2003-09-16
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Expires: 2022-06-14
Abstract
Abstract The present invention is a direct conversion programmable power controller that receives polyphase input power that has an input power frequency a polarity. The controller includes a primary chopper for each phase of electrical power. Each primary chopper is electrically connected in wye connection to a transformer. A secondary chopper demodulates and rectifies each phase of power. Each secondary chopper has an input connected electrically to the secondary terminals of the transformer and has an output connected to a load in series connection.
Inventors
- 👤 Douglas S. York
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:15
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/27; H02M5/271; H02M5/275; H02M5/297; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/21; H02M7/217; H02M1/00; H02M1/0003; H02M1/0012; H02M1/0067; H02M1/0077
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
117 words
A direct conversion programmable power controller receiving polyphase input power at an input power frequency and having a polarity, the controller comprising: a primary chopper for each phase of electrical power, each primary chopper having an input, electrically connected in wye connection to each phase of power, having an output; a two-winding transformer for each phase of power, each transformer having primary and secondary terminals and connected electrically by its primary terminals to the output of the primary chopper; and a secondary chopper for demodulating and rectifying each phase of power, each secondary chopper having an input connected electrically to the secondary terminals of the transformer and having an output connected to a load in series connection.
Claim 2
Dependent Claim
117 words
A direct conversion programmable power controller receiving polyphase input power at an input power frequency and having a polarity, the controller comprising: a primary chopper for each phase of electrical power, each primary chopper having an input, electrically connected in wye connection to each phase of power, having an output; a two-winding transformer for each phase of power, each transformer having primary and secondary terminals and connected electrically by its primary terminals to the output of the primary chopper; and a secondary chopper for demodulating and rectifying each phase of power, each secondary chopper having an input connected electrically to the secondary terminals of the transformer and having an output connected to a load in series connection.
Claim 3
Dependent Claim
33 words
The controller of claim 1 , wherein the primary chopper periodically reverses the polarity of each phase of power from the power source at a frequency significantly higher than the input power frequency.
Claim 4
Dependent Claim
38 words
The controller of claim 2 , wherein the primary chopper periodically reverses the polarity of the phase of power from the power source wherein an onset of the polarity reversal within a period varies according to a sinusoid.
Claim 5
Dependent Claim
31 words
The controller of claim 3 , wherein the sinusoid has a frequency equal to a sum of the frequency of the power input frequency and a desired frequency of the output.
Claim 6
Dependent Claim
23 words
The controller of claim 4 , wherein a feedback loop generates the sinusoid according to the power input frequency and a reference sinusoid.
Claim 7
Dependent Claim
20 words
The controller of claim 5 , wherein the feedback loop samples the input power to determine the power input frequency.
Claim 8
Dependent Claim
19 words
The controller of claim 5 , wherein the feedback loop samples a power grid to generate the reference sinusoid.
Claim 9
Dependent Claim
20 words
The controller of claim 5 , wherein the feedback loop generates the reference sinusoid by means of a state machine.
Claim 10
Dependent Claim
20 words
The controller of claim 5 , wherein the feedback loop generates the reference sinusoid by means of a local oscillator.
Claim 11
Dependent Claim
21 words
The controller of claim 5 , wherein the feedback loop generates the reference inusoid from values stored in a look-up table.
Claim 12
Dependent Claim
32 words
The controller of claim 5 , wherein the secondary chopper periodically reverses the polarity of the phase of power from the transformer at the frequency significantly higher than the input power frequency.
Claim 13
Dependent Claim
38 words
The controller of claim 11 , wherein the secondary chopper conducts the phase of the power according to a duty cycle within each period and where the secondary chopper periodically reverses the polarity of the phase of power.
Claim 14
Dependent Claim
14 words
The controller of claim 12 , wherein the duty-cycle varies according to the sinusoid.
Claim 15
Dependent Claim
31 words
The controller of claim 12 , wherein feedback loop samples the power at the load and varies a coefficient between zero and one according to the amplitude of the sampled power.
Claim 16
Dependent Claim
21 words
The controller of claim 14 , wherein the duty cycle varies according to the product of the coefficient and the sinusoid.
Claim 17
Dependent Claim
22 words
The controller of claim 12 , wherein the secondary chopper modulates the input power applied to the load according to the sinusoid.
Claim 18
Dependent Claim
24 words
The controller of claim 4 , wherein the secondary chopper comprises rectifiers periodically reversing the output of the transformer for each phase of power.
Claim 19
Dependent Claim
30 words
The controller of claim 17 , wherein the secondary chopper reverses the output of the transformer for each phase of power according to the polarity of output of the transformer.
Claim 20
Independent Claim
239 words
A method for controlling three-phase electrical power, the power having a polarity and a power frequency, the method comprising: generating a first electrical signal, having a first frequency greater than the power frequency of the three-phase electrical power; generating three second signals each of the second signals having a second frequency and being offset from the other second signals by phase-angles of 2π/3 radians; providing the three-phase electrical power from a wye connected power source, each phase of electrical power being offset from the other phases of the electrical power by phase-angles of 2π/3 radians; phase-angle modulating the first signal according to each second signal to produce a third signal at the first frequency to correspond with each phase of the three-phase electrical power; reversing the polarity of each phase of electrical power at the first frequency according to the third signal that corresponds with the phase of electrical power; providing a two-winding transformer having primary and secondary terminals for each phase of electrical power; applying the phase of electrical power and the reversed phase of electrical power across each set of the primary terminals; chopping each phase of electrical power induced across each set of secondary terminals to pulse-width-modulate each phase of electrical power according to an instantaneous value of the second signal; rectifying each phase of electrical power to produce a generally biased voltage; applying the phases of electrical power from the secondary terminals to series load.
Claim 21
Independent Claim
239 words
A method for controlling three-phase electrical power, the power having a polarity and a power frequency, the method comprising: generating a first electrical signal, having a first frequency greater than the power frequency of the three-phase electrical power; generating three second signals each of the second signals having a second frequency and being offset from the other second signals by phase-angles of 2π/3 radians; providing the three-phase electrical power from a wye connected power source, each phase of electrical power being offset from the other phases of the electrical power by phase-angles of 2π/3 radians; phase-angle modulating the first signal according to each second signal to produce a third signal at the first frequency to correspond with each phase of the three-phase electrical power; reversing the polarity of each phase of electrical power at the first frequency according to the third signal that corresponds with the phase of electrical power; providing a two-winding transformer having primary and secondary terminals for each phase of electrical power; applying the phase of electrical power and the reversed phase of electrical power across each set of the primary terminals; chopping each phase of electrical power induced across each set of secondary terminals to pulse-width-modulate each phase of electrical power according to an instantaneous value of the second signal; rectifying each phase of electrical power to produce a generally biased voltage; applying the phases of electrical power from the secondary terminals to series load.
Claim 22
Dependent Claim
18 words
The method of claim 19 , wherein providing three-phase electrical power includes filtering the power to remove ripple.
Claim 23
Dependent Claim
18 words
The method of claim 19 , wherein applying the pulse-width-modulated electrical power includes filtering to integrate the output.
Claim 24
Dependent Claim
16 words
The method of claim 19 , wherein generating a first electrical signal includes generating a square-wave.
Claim 25
Dependent Claim
17 words
The method of claim 22 , wherein generating a first electrical signal includes generating a phase-modulated square-wave.
Claim 26
Dependent Claim
112 words
A direct conversion programmable power controller receiving polyphase input power at an input power frequency and having a polarity, the controller comprising: a primary chopper for each phase of electrical power, each primary chopper having an input, electrically connected in wye connection to each phase of power, having an output; a transformer for each phase of power, each transformer having primary and secondary terminals and connected electrically by its primary terminals to the output of the primary chopper; and a secondary chopper for each phase of power, each secondary chopper having input connected electrically to the secondary terminals of the transformer and having an output connected to a load in series connection.
Claim 27
Dependent Claim
112 words
A direct conversion programmable power controller receiving polyphase input power at an input power frequency and having a polarity, the controller comprising: a primary chopper for each phase of electrical power, each primary chopper having an input, electrically connected in wye connection to each phase of power, having an output; a transformer for each phase of power, each transformer having primary and secondary terminals and connected electrically by its primary terminals to the output of the primary chopper; and a secondary chopper for each phase of power, each secondary chopper having input connected electrically to the secondary terminals of the transformer and having an output connected to a load in series connection.
Claim 28
Dependent Claim
14 words
The controller of claim 24 , wherein the rectifying bridge is a diode bridge.
Claim 29
Dependent Claim
14 words
The controller of claim 24 , wherein the rectifying bridge is a thyristor bridge.
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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) | 2006-09-15 | 2007-03-17 | 2007-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-09-15 | 2011-03-17 | 2011-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-09-15 | 2015-03-17 | 2015-09-16 | $7700.00 | Window Closed / Lapsed |