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US5406189A
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Low input harmonic induced multiple use AC synchronous generator starter converter
Assignee: Honeywell International Inc
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Filing: 1992-12-08
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Granted: 1995-04-11
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Expires: 2012-12-08
Abstract
Abstract A synchronous generator start converter offers power conversion for performing multiple functions such as starting AC generators as a motor, charging batteries and also providing regulated DC output without degradation of input power quality. The converter utilizes common magnetic components and common semiconductor rectifiers within its three subcircuits. The three subcircuits include flyback converters, a square wave inverter and a field excitation controller.
Inventors
- 👤 Al Wohlberg
- 👤 Robert C. Eckenfelder
- 👤 Muthu K. Murugan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:39
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/42; H02M1/4208; H02M1/4216; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02P; H02P9/00; H02P9/08; H02P9/14; H02P9/26; H02P9/30; H02M1/0067; H02M1/007; H02P2101/00; H02P2101/30; Y; Y02; Y02B; Y02B70/00; Y02B70/10
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
140 words
A low input harmonic induced multiple use AC synchronous generator starter converter comprising: flyback converter means for receiving input power of either AC or DC; output power means connected to said flyback converter means for providing converted output power of either AC or DC without degradation of said input power; wherein said output power means comprises: square wave inverter means connected between said flyback converter means and said synchronous generator; field excitation controller means for providing single phase excitation to exciter stator of said synchronous generator; timing logic means for controlling said square wave inverter means; PWM controller means for controlling said flyback converter means; and, control power supply means for receiving said input power of either AC or DC and for providing control power to said field excitation controller means, said timing logic means and said PWM controller means.
Claim 2
Dependent Claim
140 words
A low input harmonic induced multiple use AC synchronous generator starter converter comprising: flyback converter means for receiving input power of either AC or DC; output power means connected to said flyback converter means for providing converted output power of either AC or DC without degradation of said input power; wherein said output power means comprises: square wave inverter means connected between said flyback converter means and said synchronous generator; field excitation controller means for providing single phase excitation to exciter stator of said synchronous generator; timing logic means for controlling said square wave inverter means; PWM controller means for controlling said flyback converter means; and, control power supply means for receiving said input power of either AC or DC and for providing control power to said field excitation controller means, said timing logic means and said PWM controller means.
Claim 3
Dependent Claim
42 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 1 wherein said square wave inverter means comprises: bus capacitor means connected across said flyback converter means; and, transistor/diode means connected across said bus capacitor means.
Claim 4
Dependent Claim
26 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 2 wherein said transistor/diode means comprises: three pairs of transistors.
Claim 5
Dependent Claim
28 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 1 wherein said square wave inverter means comprises: a plurality of steps.
Claim 6
Dependent Claim
43 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 1 wherein said timing logic comprises: EMF sensing means for monitoring output of said square wave inverter means; and, resolver means for providing a rotor position signal.
Claim 7
Dependent Claim
33 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 5 wherein: drive signals of said square wave inverter means are locked to said rotor position signal.
Claim 8
Dependent Claim
35 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 1 wherein: output of said square wave inverter means is a variable voltage, variable frequency, square wave AC output.
Claim 9
Dependent Claim
62 words
A low input harmonic induced multiple use AC synchronous generator starter converter comprising: flyback converter means for receiving input power of either AC or DC; and, output power means connected to said flyback converter means for providing converted output power of either AC or DC without degradation of said input power; wherein: magnetic components as well as several semiconductor rectifiers perform multi-functions.
Claim 10
Dependent Claim
62 words
A low input harmonic induced multiple use AC synchronous generator starter converter comprising: flyback converter means for receiving input power of either AC or DC; and, output power means connected to said flyback converter means for providing converted output power of either AC or DC without degradation of said input power; wherein: magnetic components as well as several semiconductor rectifiers perform multi-functions.
Claim 11
Dependent Claim
38 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 8 wherein: said converted output power is capable of starting AC generators as a motor, charging batteries or providing regulated DC outputs.
Claim 12
Dependent Claim
62 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 8 wherein said flyback converter means comprises: a plurality of flyback converters; rectifier bridge means connected between said input power and each of said plurality of flyback converters; and, summing diode means, connected between each of said plurality of flyback converters and said output power means.
Claim 13
Dependent Claim
26 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 8 wherein said input power comprises: three phase alternating current.
Claim 14
Dependent Claim
24 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 8 wherein said input power comprises: direct current.
Claim 15
Dependent Claim
25 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 8 wherein: said flyback converter means provides input/output isolation.
Claim 16
Dependent Claim
39 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 8 wherein: said flyback converter means operates in discontinuous conduction mode at a maximum (50%) duty cycle during AC start or DC start.
Claim 17
Dependent Claim
29 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 8 wherein: output voltage of said flyback converter means increases as load decreases.
Claim 18
Dependent Claim
58 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 8 wherein said flyback converter means comprises: three flyback converters; rectifier bridge means connected between said input power and each of said three flyback converters; and, summing diode means, connected between each of said three flyback converters and said output power means.
Claim 19
Dependent Claim
46 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 16 wherein each of said three flyback converters comprises: transistor means connected to said rectifier bridge means; and, transformer means connected between said transistor means and said summing diode means.
Claim 20
Dependent Claim
56 words
A low input harmonic induced multiple use AC synchronous generator starter converter as claimed in claim 16 wherein said rectifier bridge means comprises: low pass filter means for receiving and filtering said input power; rectifier means connected to said low pass filter means; capacitor means connected across said rectifier means for removing high frequency voltage spikes.
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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) | 1998-04-10 | 1998-10-10 | 1999-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-10 | 2002-10-10 | 2003-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-10 | 2006-10-10 | 2007-04-11 | $7700.00 | Window Closed / Lapsed |