Polyphase wave generator
Abstract
Abstract A STATIC INVERTER FOR COVERTING DIRECT CURRENT INTO POLYPHASE ALTERNATING CURRENT HAS A SOURCE OF PERIODIC SIGNALS, N BISTABLE DEVICES, AND LOGIC MEANS INCLUDING AND GATES INTERCONNECTING THE SOURCE AND THE BISTABLE DEVICES TO SWITCH THEM IN A PREDETERMINED SEQUENCE OF 2N PERMUTATIONS OF STABLE STATES AND INHIBIT THEM FROM TRANSFERRING TO PERMUTATION STATES WHICH COULD CAUSE LOCKUP. THE OUTPUTS OF THE BISTABLE DEVICES ARE COUPLED THROUGH POWER TRANSISTORS TO THE PRIMARY WINDINGS OF N OUTPUT TRANSFORMERS IN PUSH-PULL, AND TRANSFORMER SECONDARY WINDING MEANS DERIVE N PHASE VOLTAGES DISPLACED FROM ONE ANOTHER BY 360/N DEGREES OF A WAVEFORM WHICH RESULTS IN THE INSTANTANEOUS VOLTAGES ADDING TO ZERO AND THUS ELIMINATES HARMONIC CURRENTS IN THE NEUTRAL. THE INVERTER INCLUDES MEANS FOR BIASING THE POWER TRANSISTORS SO THEY OPERATE WITH LOW POWER DISSIPATION NEAR THE REGION OF SATURATION REGARDLESS OF VARIATIONS IN SUPPLY VOLTAGE.
Inventors
- 👤 John Baude
Bibliographic Details
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |