US5159544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage power supply control system
Assignee: ABB Flexible Automation Inc
•
Filing: 1989-10-10
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Granted: 1992-10-27
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Expires: 2009-10-10
Abstract
Abstract The electrostatic potential supply comprises an operating potential source (+V cc ), a transformer (122) having primary (156) and secondary (172) windings, and a resonant frequency, and a high potential rectifier and multiplier (124). The electrostatic potential supply also includes a phase comparator (110) and a voltage controlled oscillator (114) having a free running frequency of substantially the transformer (122) resonant frequency. The phase comparator (110) generates a control signal related to the frequency difference between the signal from the secondary winding (172) and the signal from the primary circuit (110, 112, 114, 116, 118, 102-1, 2) to synchronize the voltage controlled oscillator (114) output frequency substantially with the frequency of the signal from the secondary winding (172). The voltage controlled oscillator (114) is coupled to the primary winding (156) to maintain the operating frequency of the transformer (122) substantially at its resonant frequency.
Inventors
- 👤 Daniel C. Hughey
- 👤 Robert R. Atherton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:42
CPC Classifications
H; H02; H02M; H02M3/00; H02M3/22; H02M3/24; H02M3/28; H02M3/325; H02M3/335; H02M3/337; H02M3/3376; H02M3/3378; B; B03; B03C; B03C3/00; B03C3/02; Y; Y02; Y02B; Y02B70/00; Y02B70/10; Y10; Y10S; Y10S323/00; Y10S323/903
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
220 words
In combination, a high magnitude electrostatic potential supply, an electrostatic potential utilization device, and means for coupling the electrostatic potential supply to the utilization device, the electrostatic potential supply comprising an operating potential source, a transformer having primary and secondary windings, a high potential rectifier and multiplier having a pair of output terminals, means for coupling the operating potential source to the primary winding, means for coupling the secondary winding to the high voltage rectifier and multiplier, the circuit including the transformer and the high voltage rectifier and multiplier having a resonant frequency and a high Q, a phase comparator having first and second inputs, a voltage controlled oscillator having a free running frequency of substantially the transformer resonant frequency, means for coupling the secondary winding to the first input of the phase comparator, means for coupling the output of the voltage controlled oscillator to the second input of the phase comparator, means for driving the primary winding of the transformer, means for coupling the driving means to the primary winding, and means for coupling the voltage controlled oscillator to the driving means to maintain the operating frequency of the transformer substantially at the resonant frequency, variation of the operating frequency from the resonant frequency rapidly reducing the voltage across the output terminals of the high voltage rectifier and multiplier.
Claim 2
Dependent Claim
220 words
In combination, a high magnitude electrostatic potential supply, an electrostatic potential utilization device, and means for coupling the electrostatic potential supply to the utilization device, the electrostatic potential supply comprising an operating potential source, a transformer having primary and secondary windings, a high potential rectifier and multiplier having a pair of output terminals, means for coupling the operating potential source to the primary winding, means for coupling the secondary winding to the high voltage rectifier and multiplier, the circuit including the transformer and the high voltage rectifier and multiplier having a resonant frequency and a high Q, a phase comparator having first and second inputs, a voltage controlled oscillator having a free running frequency of substantially the transformer resonant frequency, means for coupling the secondary winding to the first input of the phase comparator, means for coupling the output of the voltage controlled oscillator to the second input of the phase comparator, means for driving the primary winding of the transformer, means for coupling the driving means to the primary winding, and means for coupling the voltage controlled oscillator to the driving means to maintain the operating frequency of the transformer substantially at the resonant frequency, variation of the operating frequency from the resonant frequency rapidly reducing the voltage across the output terminals of the high voltage rectifier and multiplier.
Claim 3
Dependent Claim
40 words
The combination of claim 1 wherein the phase comparator controls the voltage controlled oscillator output such that the signal from the secondary winding and the output signal of the voltage controlled oscillator are displaced in phase by about 90 degrees.
Claim 4
Dependent Claim
57 words
The combination of claim 1 wherein the means for coupling the secondary winding to the first input of the phase comparator comprises means for attenuating the voltage signal from the secondary winding, means for coupling the secondary winding to the attenuating means, and means for coupling the attenuating means to the first input of the phase comparator.
Claim 5
Dependent Claim
39 words
The combination of claim 1 and further comprising a low pass filter, means for coupling the phase comparator to the low pass filter, and means for coupling the low pass filter to the input of the voltage controlled oscillator.
Claim 6
Dependent Claim
265 words
In combination, a high magnitude electrostatic potential supply, an electrostatic potential utilization device, and means for coupling the electrostatic potential supply to the utilization device, the electrostatic potential supply comprising an operating potential source, a transformer having primary and second windings, a high potential rectifier and multiplier having a pair of output terminals, means for coupling the operating potential source to the primary winding, means for coupling the secondary winding to the high voltage rectifier and multiplier, the circuit including the transformer and the high voltage rectifier and multiplier having a resonant frequency and a high Q, a voltage controlled oscillator having a free running frequency of substantially the transformer resonant frequency, means for comparing the frequency of a signal from the secondary winding with the frequency of the output signal of the voltage controlled oscillator, the comparing means generating a control signal related to the frequency difference between the signal from the secondary winding and the signal from the voltage controlled oscillator output, means for coupling the comparing means to the input of the voltage controlled oscillator to substantially synchronize the voltage controlled oscillator output frequency with the frequency of the signal from the secondary winding, means for driving the primary winding of the transformer, means for coupling the driving means to the primary winding, and means for coupling the voltage controlled oscillator to the driving means to maintain the operating frequency of the transformer substantially at the resonant frequency, variation of the operating frequency from the resonant frequency rapidly reducing the voltage across the output terminals of the high voltage rectifier and multiplier.
Claim 7
Dependent Claim
265 words
In combination, a high magnitude electrostatic potential supply, an electrostatic potential utilization device, and means for coupling the electrostatic potential supply to the utilization device, the electrostatic potential supply comprising an operating potential source, a transformer having primary and second windings, a high potential rectifier and multiplier having a pair of output terminals, means for coupling the operating potential source to the primary winding, means for coupling the secondary winding to the high voltage rectifier and multiplier, the circuit including the transformer and the high voltage rectifier and multiplier having a resonant frequency and a high Q, a voltage controlled oscillator having a free running frequency of substantially the transformer resonant frequency, means for comparing the frequency of a signal from the secondary winding with the frequency of the output signal of the voltage controlled oscillator, the comparing means generating a control signal related to the frequency difference between the signal from the secondary winding and the signal from the voltage controlled oscillator output, means for coupling the comparing means to the input of the voltage controlled oscillator to substantially synchronize the voltage controlled oscillator output frequency with the frequency of the signal from the secondary winding, means for driving the primary winding of the transformer, means for coupling the driving means to the primary winding, and means for coupling the voltage controlled oscillator to the driving means to maintain the operating frequency of the transformer substantially at the resonant frequency, variation of the operating frequency from the resonant frequency rapidly reducing the voltage across the output terminals of the high voltage rectifier and multiplier.
Claim 8
Dependent Claim
40 words
The combination of claim 5 wherein the control signal controls the voltage controlled oscillator output such that the signal from the secondary winding and the output signal of the voltage controlled oscillator are displaced in phase by about 90 degrees.
Claim 9
Dependent Claim
39 words
The combination of claim 5 and further comprising means for attenuating the voltage signal from the secondary winding, means for coupling the secondary winding to the attenuating means, and means for coupling the attenuating means to the comparing means.
Claim 10
Dependent Claim
49 words
The combination of claim 5 wherein the means for coupling the comparing means to the voltage controlled oscillator input comprises a low pass filter, means for coupling the comparing means to the low pass filter, and means for coupling the low pass filter to the voltage controlled oscillator input.
Claim 11
Dependent Claim
263 words
In combination, a high magnitude electrostatic potential supply, an electrostatic potential utilization device, and means for coupling the electrostatic potential supply to the utilization device, the electrostatic potential supply comprising an operating potential source, a transformer having primary and secondary windings, a high potential rectifier and multiplier having a pair of output terminals, means for coupling the operating potential source to the primary winding, means for coupling the secondary winding to the high voltage rectifier and multiplier, the circuit including the transformer and the high voltage rectifier and multiplier having a resonant frequency and a high Q, means for driving the primary winding of the transformer, means for generating an input signal to control the operating frequency of the driving means, the frequency of the input signal being variable and having an initial frequency of substantially the transformer resonant frequency, means for coupling the generating means to the driving means, means for comparing the frequency of a signal at the primary winding with the frequency of a signal at the secondary winding, the comparing means generating a control signal related to the frequency difference between the signals at the primary and secondary windings, means for coupling the comparing means to the generating means so that the control signal substantially synchronizes the frequency of the input signal with the frequency of the signal from the secondary winding to maintain the operating frequency of the transformer substantially at the resonant frequency, variation of the operating frequency from the resonant frequency rapidly reducing the voltage across the output terminals of the high voltage rectifier and multiplier.
Claim 12
Dependent Claim
263 words
In combination, a high magnitude electrostatic potential supply, an electrostatic potential utilization device, and means for coupling the electrostatic potential supply to the utilization device, the electrostatic potential supply comprising an operating potential source, a transformer having primary and secondary windings, a high potential rectifier and multiplier having a pair of output terminals, means for coupling the operating potential source to the primary winding, means for coupling the secondary winding to the high voltage rectifier and multiplier, the circuit including the transformer and the high voltage rectifier and multiplier having a resonant frequency and a high Q, means for driving the primary winding of the transformer, means for generating an input signal to control the operating frequency of the driving means, the frequency of the input signal being variable and having an initial frequency of substantially the transformer resonant frequency, means for coupling the generating means to the driving means, means for comparing the frequency of a signal at the primary winding with the frequency of a signal at the secondary winding, the comparing means generating a control signal related to the frequency difference between the signals at the primary and secondary windings, means for coupling the comparing means to the generating means so that the control signal substantially synchronizes the frequency of the input signal with the frequency of the signal from the secondary winding to maintain the operating frequency of the transformer substantially at the resonant frequency, variation of the operating frequency from the resonant frequency rapidly reducing the voltage across the output terminals of the high voltage rectifier and multiplier.
Claim 13
Dependent Claim
25 words
The combination of claim 9 wherein the generating means includes a voltage controlled oscillator having a free running frequency of substantially the transformer resonant frequency.
Claim 14
Dependent Claim
46 words
The combination of claim 10 wherein the comparing means includes a phase comparator, means for coupling the secondary winding to a first input of the phase comparator, and means for coupling the output of the voltage controlled oscillator to a second input of the phase comparator.
Claim 15
Dependent Claim
52 words
The combination of claim 11 wherein the means for coupling the comparing means to the generating means comprises a low pass filter, means for coupling the output of the phase comparator to the low pass filter, and means for coupling the low pass filter to the input of the voltage controlled oscillator.
Claim 16
Dependent Claim
56 words
The combination of claim 11 wherein the means for coupling the secondary winding to the first input of the phase comparator comprises means for attenuating the signal from the secondary winding, means for coupling the secondary winding to the attenuating means, and means for coupling the attenuating means to the first input of the phase comparator.
References Cited (Backward Citations)
US2302289A
Cited
US2302185A
Cited
US2509277A
Cited
US2650329A
Cited
GB720418A
Cited
US3048498A
Cited
US2881092A
Cited
US3273015A
Cited
US3367578A
Cited
US3641971A
Cited
US3567996A
Cited
US3608823A
Cited
US3599038A
Cited
US3731145A
Cited
GB1387632A
Cited
US3872370A
Cited
US4000443A
Cited
US3895262A
Cited
US3851618A
Cited
US3875892A
Cited
US3893006A
Cited
US3894272A
Cited
US4208706A
Cited
US4187527A
Cited
US4075677A
Cited
US4103356A
Cited
US4148932A
Cited
US4120015A
Cited
US4165022A
Cited
US4331298A
Cited
US4213167A
Cited
US4210858A
Cited
US4251735A
Cited
US4257089A
Cited
US4371917A
Cited
GB2077066A
Cited
US4463415A
Cited
US4402030A
Cited
US4485427A
Cited
US4652318A
Cited
US4481557A
Cited
US4616300A
Cited
US4480297A
Cited
US4535399A
Cited
US4587475A
Cited
US4560950A
Cited
US4523267A
Cited
US4710849A
Cited
US4672521A
Cited
US4677534A
Cited
US4730243A
Cited
US4783728A
Cited
US4745520A
Cited
US4700285A
Cited
US4893227A
Cited
US5008800A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-10-27 | 1996-04-27 | 1996-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-10-27 | 2000-04-27 | 2000-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-10-27 | 2004-04-27 | 2004-10-27 | $7700.00 | Window Closed / Lapsed |