US3622804A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for periodically reversing electrical energy through a load
Assignee: PROCESS ELECTRONICS Corp
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Filing: 1970-08-19
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Granted: 1971-11-23
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Expires: 1990-08-19
Abstract
Abstract A system for feeding electrical energy from an alternating current source to a load through a rectifier arrangement, the arrangement comprising one or more pairs of back-to-back rectifying devices connected in parallel between an alternating current source and the load. Each of the elements in the pairs of rectifying elements are separately controlled such that the system may provide a main current flow of a preselected configuration and wherein the opposite rectifying element is periodically selectively energized to provide a periodic reversal of the energy through the load.
Inventors
- 👤 Claybourne Mitchell Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:40
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/02; H02M7/04; H02M7/12; H02M7/145; H02M7/155; H02M7/17
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
In an electrochemical power supply system for selectively reversing the flow of current from a source of electrical energy through a noninductive electrolytic load having a control circuit connected between source and said load, the improvement comprising a control circuit including a first substantially unidirectional bistable controllable conductive element normally in the nonconductive mode connected in controlling relation with the source and load in a first polarity sense, first discrete independent controlling means connected to said first bistable conductive means for switching said conductive means between the nonconductive and the conductive modes in response to a control pulse, a second substantially unidirectional bistable controllable conductive element normally in the nonconductive mode connected in controlling relation with the source and load in a second polarity, a second discrete independent controlling means connected to said second bistable conductive means for switching said second conductive means between the nonconductive and the conductive modes in response to a control pulse, said first and second controlling means being adapted to provide variable independent control of said first and second conductive elements and positive and negative waveform of electrical energy supplied to the load.
Claim 2
Dependent Claim
188 words
In an electrochemical power supply system for selectively reversing the flow of current from a source of electrical energy through a noninductive electrolytic load having a control circuit connected between source and said load, the improvement comprising a control circuit including a first substantially unidirectional bistable controllable conductive element normally in the nonconductive mode connected in controlling relation with the source and load in a first polarity sense, first discrete independent controlling means connected to said first bistable conductive means for switching said conductive means between the nonconductive and the conductive modes in response to a control pulse, a second substantially unidirectional bistable controllable conductive element normally in the nonconductive mode connected in controlling relation with the source and load in a second polarity, a second discrete independent controlling means connected to said second bistable conductive means for switching said second conductive means between the nonconductive and the conductive modes in response to a control pulse, said first and second controlling means being adapted to provide variable independent control of said first and second conductive elements and positive and negative waveform of electrical energy supplied to the load.
Claim 3
Dependent Claim
39 words
The circuit of claim 1 wherein said first conductive element is rendered conductive for a first preselected portion of a time period and said second conductive element is rendered conductive for a second preselected portion of the time period.
Claim 4
Dependent Claim
52 words
The circuit of claim 1 wherein said source of electrical energy is an alternating current source, and said first conductive element is selectively enabled for a preselected number of cycles while said second conductive element is disabled, and said second conductive element is enabled for at least a portion of one cycle.
Claim 5
Dependent Claim
18 words
The circuit of claim 1 wherein said conductive elements are controlled semiconductor devices connected in parallel, back-to-back relation.
Claim 6
Dependent Claim
41 words
The circuit of claim 4 wherein said source of electrical energy includes a source of polyphase voltage and pairs of said conductive elements are connected in series circuit with said load to control each of the phases of said polyphase source.
Claim 7
Dependent Claim
46 words
The circuit of claim 4 wherein said semiconductor devices are controlled rectifiers having gate electrodes, the gate electrode of said first conductive element being connected to said first controlling means and the gate electrode of said second conductive element being connected to said second controlling means.
Claim 8
Dependent Claim
18 words
The circuit of claim 1 wherein said independent controls are programmed to provide asymmetric waveforms in each polarity.
Claim 9
Dependent Claim
26 words
The circuit of claim 7 wherein said independent controls are programmed to provide differing and variable pulse widths, pulse spacing and pulse amplitude in each polarity.
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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |