Method for controlling an inverter under altering voltage
AssigneeZippy Technology Corp.
InventorsChin-Wen Chou, Ying-Nan Cheng, Chin-Biau Chung
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Abstract
A method for controlling an inverter under altering voltage aims to change the electric conductive interval of the electric conductive cycle of the inverter corresponding to alteration of an input voltage so that the dimming duty cycle, electric conductive cycle and transformer oscillation duty cycle of the inverter can be maintained at a selected level. Thereby when the input voltage is altered, the existing dimming range can be maintained and actuation electricity output is stabilized. The transformer can be protected and the life span of the load can be extended.
Claims20
A method for controlling an inverter under altering voltage, comprising the steps of:
- A. receiving an external dimming signal to determine output of a dimming duty cycle;
- B. receiving the dimming duty cycle and getting an input voltage and determining output of an electric conductive cycle corresponding to operating conditions of a transformer of the inverter;
- C. receiving the electric conductive cycle to determine output of a transformer oscillation duty cycle of the inverter;
- D. altering an electric conductive interval of the electric conductive cycle when the input voltage alters according to alteration of the input voltage based on criteria of the transformer oscillation duty cycle at step C;
- and
- E. receiving the electric conductive cycle after the electric conductive interval has been altered to determine output of the transformer oscillation duty cycle of the inverter.
Dependencies are inferred from the claim text.