Means for refreshing a triac control circuit power supply

Details Means for refreshing a triac control circuit power supply Means for refreshing a triac control circuit power supply

1990-01-16

1991-06-18

Beha, Jr., William H.

Electric heating

Heating devices

With power supply and voltage or current regulation or...

219499, 219501, 323236, 323319, H05B 102, G05F 145

Patent

active

050251341

ABSTRACT:
An electronic controller comprising two input terminals between which an AC line and an electrical load are connected in series. A processing unit generates a command signal to control the supply of electrical power to the electrical load which closes an electronic switch also connected between the two input terminals for connecting the AC line and the load in series in a closed loop. A power supply voltage of the controller is provided by a second power supply derived from the two input terminals, consequently from the AC line through the load when the switch is open. When the command signal is generated, an electronic circuit opens the switch which is normally closed by this command signal to maintain the power supply voltage of the controller according to an adequate standard of operation. To energize the controller, the opening of the switch is activated in a temporary and repetitive manner for a certain whole number of cycles of the sector. This opening is whether periodic or occurs while the power supply voltage of the controller transits underneath a predetermined threshold value.

REFERENCES:
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patent: 4678985 (1987-07-01), Moskin
patent: 4745300 (1988-05-01), Kammerer et al.
patent: 4878010 (1989-10-01), Weber

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