US3772585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capacity compensation and discrimination circuits for high voltage power supply
Assignee: General Electric Co
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Filing: 1973-02-28
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Granted: 1973-11-13
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Expires: 1993-02-28
Abstract
Abstract A high voltage power supply having regulated resistive current. The power supply is in an environment for drawing both resistive and capacitive currents. It is desired to regulate the resistive current only and to cancel out and/or discriminate against the capacitive current. The power supply utilizes a novel capacitive compensation network which adds a voltage of an equal magnitude but in an opposite phase relationship to the voltage due to the capacitive current through the power supply. This circuit is effective for cancelling out capacitive currents for certain relatively low frequency ranges. A phase discriminator is further provided to operate in conjunction with the capacitive compensation circuit in order to pass only the resistive component of current to a control circuit for resistive current regulation. The effect of the capacitive current is thus cancelled and discriminated against by combining the capacitive compensation network with the phase discrimination network and effective regulation is obtained for higher frequencies.
Inventors
- 👤 L Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:28
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/02; G03G15/0283; G05; G05F; G05F1/00; G05F1/10; G05F1/12
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
84 words
A power supply circuit having resistive and capacitive current components comprising: a transformer having primary and secondary windings; feedback means for connecting said circuit to a regulator control; a capacity compensation means connected to said secondary winding and to said feedback means for substantially cancelling the effect of capacitive current but retaining the effect of resistive current on said feedback means; means for varying the impedance of said capacity compensation means connected to said feedback means, whereby resistive current is adapted to be regulated.
Claim 2
Dependent Claim
84 words
A power supply circuit having resistive and capacitive current components comprising: a transformer having primary and secondary windings; feedback means for connecting said circuit to a regulator control; a capacity compensation means connected to said secondary winding and to said feedback means for substantially cancelling the effect of capacitive current but retaining the effect of resistive current on said feedback means; means for varying the impedance of said capacity compensation means connected to said feedback means, whereby resistive current is adapted to be regulated.
Claim 3
Dependent Claim
50 words
A power supply circuit as set forth in claim 1 wherein said capacity compensation circuit includes a capacitance; said means for varying the impedance includes a variable resistance; said capacitance and said variable resistance being connected in a serieS relation and further across at least part of said secondary winding.
Claim 4
Dependent Claim
49 words
A power supply circuit as set forth in claim 2 wherein said capacity compensation means further includes a sensing means for sensing the total load current through the power supply, the voltage drop across said sensing means being equal and opposite to the voltage drop across said variable resistance.
Claim 5
Dependent Claim
34 words
A power supply as set forth in claim 1 further including a tap connected to said secondary winding, said capacity compensation means being connected between one side of said secondary winding and said tap.
Claim 6
Dependent Claim
86 words
A power supply having resistive and capacitive current components adapted for use with a regulation feedback circuit comprising: an input transformer having a primary and at least a first secondary winding; a capacity compensation circuit connected to said first secondary winding of said input transformer for substantially cancelling the effect of capacitive current in said compensation circuit; phase detector connected to said capacity compensation circuit and to a regulated feedback control circuit for discrimination against capaitive current, whereby the resistive current is adapted to be regulated.
Claim 7
Dependent Claim
86 words
A power supply having resistive and capacitive current components adapted for use with a regulation feedback circuit comprising: an input transformer having a primary and at least a first secondary winding; a capacity compensation circuit connected to said first secondary winding of said input transformer for substantially cancelling the effect of capacitive current in said compensation circuit; phase detector connected to said capacity compensation circuit and to a regulated feedback control circuit for discrimination against capaitive current, whereby the resistive current is adapted to be regulated.
Claim 8
Dependent Claim
117 words
A power supply as set forth in claim 5 wherein said phase detector includes, a secondary winding magneticly coupled to said first secondary winding for establishing a reference voltage, a first rectifier connected to one side of said second secondary winding and a second rectifier connected to the other side of said second secondary winding, said rectifiers poled to conduct only during one polarity of the reference voltage, a capacitance connected to the anode of said first rectifier and to the cathode of said second rectifier for integrating the current in said phase detector, whereby the voltage due to capacitive current is discriminated against and the only voltage due to resistive current is fed back for regulation.
References Cited (Backward Citations)
US2858406A
Cited
US3601718A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |