Patent US3859585A successfully refreshed from Google Patents.
US3859585A
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Multiple control wave form circuit
Assignee: Reliance Electric Co
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Filing: 1973-12-06
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Granted: 1975-01-07
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Expires: 1993-12-06
Abstract
Abstract An apparatus for multiple control of a reference and a carrier wave form is disclosed comprising a circuit for establishing a variable frequency reference wave form and a generator for establishing the carrier wave form. A first control provides a free-running carrier to provide infinite ratios of carrier to reference frequency and smooth transition of the reference frequency through zero Hertz for smooth four quadrant control operation. A second control maintains integral ratios of carrier to reference frequency in the intermediate reference frequency range and provides a substantially high number of intermediate integral ratios. A third control maintains discrete ratios at high reference frequencies and changes among the discrete ratios in accordance with the amount of modulation of the reference wave form by the carrier wave form.
Inventors
- 👤 Udo H Meier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:08
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/505; H02M7/515; H02M7/525; H02M1/00; H02M1/08; H02M1/081
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
77 words
An apparatus for multiple control of a first and a second wave form, comprising in combination: a circuit for establishing a variable frequency first wave form; a generator for establishing the second wave form; first control means for providing a free-running second wave form at low first wave form frequencies; and means for synchronizing the first and second wave forms in a substantial number of integral frequency ratios at frequencies above said low first wave form frequencies.
Claim 2
Independent Claim
77 words
An apparatus for multiple control of a first and a second wave form, comprising in combination: a circuit for establishing a variable frequency first wave form; a generator for establishing the second wave form; first control means for providing a free-running second wave form at low first wave form frequencies; and means for synchronizing the first and second wave forms in a substantial number of integral frequency ratios at frequencies above said low first wave form frequencies.
Claim 3
Dependent Claim
17 words
An apparatus as set forth in claim 1, wherein said substantial number is substantially an infinite number.
Claim 4
Independent Claim
104 words
An apparatus for multiple control of a first and a second wave form, comprising in combination: a circuit for establiShing a variable frequency first wave form; a generator for establishing the second wave form; first control means for providing a free-running second wave form at low first wave form frequencies; second control means for synchronizing the first and second wave forms in a substantially infinite number of intermediate integral frequency ratios at intermediate first wave form frequencies; and third control means for synchronizing the first and second wave forms in a discrete number of low integral frequency ratios at high first wave form frequencies.
Claim 5
Independent Claim
104 words
An apparatus for multiple control of a first and a second wave form, comprising in combination: a circuit for establiShing a variable frequency first wave form; a generator for establishing the second wave form; first control means for providing a free-running second wave form at low first wave form frequencies; second control means for synchronizing the first and second wave forms in a substantially infinite number of intermediate integral frequency ratios at intermediate first wave form frequencies; and third control means for synchronizing the first and second wave forms in a discrete number of low integral frequency ratios at high first wave form frequencies.
Claim 6
Independent Claim
178 words
An apparatus for multiple control of a first and a second wave form, comprising in combination: a circuit for establishing a variable frequency first wave form; a generator for establishing the second wave form; first control means for establishing the second wave form at a nominal frequency to be free running at low first wave form frequencies, said nominal frequency establishing high ratios of second to first wave form frequencies at low first wave form frequencies, said nominal frequency establishing a first intermediate integral ratio of the second wave form frequency to a given intermediate first wave form frequency; second control means for varying the second wave form frequency in accordance with the intermediate first wave form frequency to maintain said first intermediate integral ratio, said second control means re-establishing said nominal frequency at a second intermediate integral ratio when the variation of said second wave form frequency from said nominal frequency reaches a predetermined boundary; and third control means for providing low ratios of the second to first wave form frequency at high first wave form frequencies.
Claim 7
Independent Claim
178 words
An apparatus for multiple control of a first and a second wave form, comprising in combination: a circuit for establishing a variable frequency first wave form; a generator for establishing the second wave form; first control means for establishing the second wave form at a nominal frequency to be free running at low first wave form frequencies, said nominal frequency establishing high ratios of second to first wave form frequencies at low first wave form frequencies, said nominal frequency establishing a first intermediate integral ratio of the second wave form frequency to a given intermediate first wave form frequency; second control means for varying the second wave form frequency in accordance with the intermediate first wave form frequency to maintain said first intermediate integral ratio, said second control means re-establishing said nominal frequency at a second intermediate integral ratio when the variation of said second wave form frequency from said nominal frequency reaches a predetermined boundary; and third control means for providing low ratios of the second to first wave form frequency at high first wave form frequencies.
Claim 8
Dependent Claim
28 words
An apparatus as set forth in claim 4, wherein said first control means establishes said nominal frequency to be free running at a zero first wave form frequency.
Claim 9
Dependent Claim
15 words
An apparatus as set forth in claim 4, wherein said nominal frequency is substantially fixed.
Claim 10
Dependent Claim
23 words
An apparatus as set forth in claim 4, wherein said second control means includes integrator means for maintaining said first intermediate integral ratio.
Claim 11
Dependent Claim
44 words
An apparatus as set forth in claim 7, wherein said second control means includes reset means for resetting said integrator means for re-establishing said nominal frequency and to provide a substantially infinite number of synchronized ratios at intermediate frequencies of the first wave form.
Claim 12
Dependent Claim
20 words
An apparatus as set forth in claim 4, wherein said third control means provides a discrete number of low ratios.
Claim 13
Dependent Claim
26 words
An apparatus as set forth in claim 9, wherein said third control means includes a multiple output means to provide said discrete number of low ratios.
Claim 14
Dependent Claim
18 words
An apparatus as set forth in claim 10, wherein said multiple output means includes a multiple gain amplifier.
Claim 15
Dependent Claim
226 words
An inverter for controlling thyristor means with a reference and a carrier wave form, comprising in combination: a reference generator circuit for establishing a variable frequency reference wave form; a carrier generator circuit for establishing the carrier wave form at a frequency in accordance with an input thereto; first control means including a substantially fixed source level for establishing a nominal carrier frequency which is free running at zero reference frequency and which provides high carrier to reference frequency ratios at low reference frequencies, said nominal frequency establishing a first intermediate integral ratio of the carrier to reference frequency at a given intermediate reference frequency; second control means including integrator means for varying the carrier frequency about said nominal frequency in accordance with the intermediate reference frequency to maintain said first intermediate integral ratio, said second control means including reset means for resetting said integrator means to re-establish said nominal carrier frequency at a second intermediate inTegral ratio when the variation of said carrier frequency from said nominal frequency reaches a predetermined boundary to provide a substantially infinite number of synchronized ratios in the intermediate frequency range of the reference wave form, and third control means including a multiple output means for providing a discrete low ratio of carrier to reference frequency for each output of said multiple output means at high reference wave form frequencies.
Claim 16
Dependent Claim
226 words
An inverter for controlling thyristor means with a reference and a carrier wave form, comprising in combination: a reference generator circuit for establishing a variable frequency reference wave form; a carrier generator circuit for establishing the carrier wave form at a frequency in accordance with an input thereto; first control means including a substantially fixed source level for establishing a nominal carrier frequency which is free running at zero reference frequency and which provides high carrier to reference frequency ratios at low reference frequencies, said nominal frequency establishing a first intermediate integral ratio of the carrier to reference frequency at a given intermediate reference frequency; second control means including integrator means for varying the carrier frequency about said nominal frequency in accordance with the intermediate reference frequency to maintain said first intermediate integral ratio, said second control means including reset means for resetting said integrator means to re-establish said nominal carrier frequency at a second intermediate inTegral ratio when the variation of said carrier frequency from said nominal frequency reaches a predetermined boundary to provide a substantially infinite number of synchronized ratios in the intermediate frequency range of the reference wave form, and third control means including a multiple output means for providing a discrete low ratio of carrier to reference frequency for each output of said multiple output means at high reference wave form frequencies.
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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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |