Inverter apparatus with adaptable voltage-to-frequency control

Details Inverter apparatus with adaptable voltage-to-frequency control Inverter apparatus with adaptable voltage-to-frequency control

2008-03-25

2009-12-08

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

With condition responsive means to control the output...

Reexamination Certificate

active

07630222

ABSTRACT:
An inverter apparatus has an adaptable high-resolution voltage-to-frequency (V/f) control. The inverter apparatus receives an analog input signal and includes a first circuit, a second circuit, a third circuit, and a micro-controller unit. The first circuit processes a small-signal portion of the analog input signal with a larger voltage gain. The second and the third circuit both processes large-signal portions of the analog input signal with smaller voltage gains respectively. The three processed analog input signals of the first, the second, and the third circuits are converted into three digital output values respectively. The largest digital output value is selected by the micro-controller unit and supplied to a frequency operation unit for generating a corresponding output frequency.

REFERENCES:
patent: 6768284 (2004-07-01), Lee et al.
patent: 7177165 (2007-02-01), Deng et al.
patent: 7551108 (2009-06-01), Lee

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