Inverter

Details Inverter Inverter

1983-11-30

1987-01-06

Smith, Jr., David

Electricity: motive power systems

Induction motor systems

Primary circuit control

318803, H02P 540

Patent

active

046349529

ABSTRACT:
A software-based inverter has a logic portion which is preferably made of LSIs. The inverter is therefore low-cost, yet provides a more efficient, precise and sophisticated operation for the inverter-motor combination. The inverter permits independent frequency and voltage application within the maximum and minimum voltage/frequency envelopes for a substantially optimal inverter-motor performance under a given load condition. The higher harmonics associated with the signal modulation are limited to a range between 0.9 kHz to 1.5 kHz with the center frequency at 1.2 kHz so that the harmonics are substantially attenuated by motor windings compared to the signal having a frequency range of 10 Hz-120 Hz, thereby resulting in higher efficiency and lower noise and vibration levels for the inverter-motor combination.

REFERENCES:
patent: 3662247 (1972-05-01), Schieman
patent: 3986087 (1976-10-01), Zankl et al.
patent: 4189669 (1980-02-01), Van Loon et al.
patent: 4290001 (1981-09-01), Espelage
patent: 4337429 (1982-06-01), Stuart
patent: 4348734 (1982-09-01), Dougherty
patent: 4409534 (1983-10-01), Bose
patent: 4488103 (1984-12-01), Morinaga et al.

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