US3571698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low distortion automatic voltage regulator having controlled rectifiers
Assignee: Superior Electric Co
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Filing: 1969-02-17
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Granted: 1971-03-23
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Expires: 1989-02-17
Abstract
Abstract An automatic voltage regulator for providing a substantially constant output voltage by regulating the input voltage with a transformer that has a secondary winding connected between the input and output of the regulator and a primary winding connected to controlled rectifiers so that control of the conduction of the rectifiers alters the voltage in the transformer to regulate the input voltage. A harmonic voltage filter is also connected to the primary winding in parallel with the controlled rectifiers to substantially minimize the percentage of distortion caused by the controlled rectifiers in the output of the regulator by shunting the harmonic voltages back to the controlled rectifiers. The filter also provides a voltage that is in opposition to the controlled rectifier voltage in the primary winding and is employed to regulate the input voltage at some operating conditions of the regulator.
Inventors
- 👤 Owen J Mccabe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:12
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/24; G05F1/26; G05F1/30
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
An automatic voltage regulator comprising a pair of input terminals adapted to be connected to a source of AC output terminals at which a substantially constant value of AC voltage is maintained, a common joining an input and an output terminal, a transformer having a first winding and a second winding, said first winding having one end connected to another input terminal and another end connected to another output terminal, distortion filter means connected between said one end and a first end of the second winding, controlled rectifier means connected between said another end and the first end of the second winding, means connecting the other end of the second winding to the common and means connected to control the conduction of the controlled rectifier means to provide a voltage in the second winding which alters the value of the input voltage to the maintained value of output voltage.
Claim 2
Dependent Claim
149 words
An automatic voltage regulator comprising a pair of input terminals adapted to be connected to a source of AC output terminals at which a substantially constant value of AC voltage is maintained, a common joining an input and an output terminal, a transformer having a first winding and a second winding, said first winding having one end connected to another input terminal and another end connected to another output terminal, distortion filter means connected between said one end and a first end of the second winding, controlled rectifier means connected between said another end and the first end of the second winding, means connecting the other end of the second winding to the common and means connected to control the conduction of the controlled rectifier means to provide a voltage in the second winding which alters the value of the input voltage to the maintained value of output voltage.
Claim 3
Dependent Claim
55 words
The invention as defined in claim 1 in which the controlled rectifier means generates distortion that includes frequencies that are odd number multiples of the frequency of the AC source and the distortion filter means includes means providing a low impedance path for electric power of at least one of the odd number multiple frequencies.
Claim 4
Dependent Claim
46 words
The invention as defined in claim 2 in which the filter means has a relatively high impedance which limits the current flow of the fundamental frequency, said current flowing through said second winding in a direction opposite to current flow controlled by the controlled rectifier means.
Claim 5
Dependent Claim
55 words
The invention as defined in claim 3 in which the current flow controlled by the controlled rectifiers produces a voltage in the first winding which is additive to the input voltage and in which the current flow through the filter means produces a voltage in the first winding which is subtractive from the input voltage.
Claim 6
Dependent Claim
38 words
The invention as defined in claim 4 in which the current flow through the filter means has a value greater than the current flow controlled by the controlled rectifier means for the minimum conduction of the controlled rectifiers.
Claim 7
Dependent Claim
163 words
An automatic voltage regulator comprising a pair of input terminals adapted to be connected to an AC source, output terminals at which a substantially constant value of AC voltage is maintained, a common joining an input and an output terminal, a transformer having a first winding and a second winding, said first winding having one end connected to another input terminal and another end connected to another output terminal, controlled rectifier means connected between said another end and the first end of the second winding and capable of producing harmonic distortion upon being rendered conducting, means connecting the other end of the second winding to the common, means connected to control the conduction of the controlled rectifier means to provide a voltage in the second winding which alters the value of the input voltage to the maintained value of the output voltage and means for providing a shunt path of relatively low impedance for the harmonic distortion produced by the controlled rectifier means.
Claim 8
Dependent Claim
163 words
An automatic voltage regulator comprising a pair of input terminals adapted to be connected to an AC source, output terminals at which a substantially constant value of AC voltage is maintained, a common joining an input and an output terminal, a transformer having a first winding and a second winding, said first winding having one end connected to another input terminal and another end connected to another output terminal, controlled rectifier means connected between said another end and the first end of the second winding and capable of producing harmonic distortion upon being rendered conducting, means connecting the other end of the second winding to the common, means connected to control the conduction of the controlled rectifier means to provide a voltage in the second winding which alters the value of the input voltage to the maintained value of the output voltage and means for providing a shunt path of relatively low impedance for the harmonic distortion produced by the controlled rectifier means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-22 | 1974-09-21 | 1975-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-22 | 1978-09-21 | 1979-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-22 | 1982-09-21 | 1983-03-23 | $7700.00 | Window Closed / Lapsed |