US 11,788,760 B2
Power stealing system for low power thermostats
Luis Carlos Murillo Carrasco, Chihuahua (MX); Robert D. Juntunen, Minnetonka, MN (US); Jesus Omar Ponce, Chihuahua (MX); Eduardo Saenz Balderrama, Panorámico (MX); and Cesar Alejandro Arzate, Chihuahua (MX)
Assigned to Ademco Inc., Golden Valley, MN (US)
Filed by Ademco Inc., Golden Valley, MN (US)
Filed on Nov. 4, 2020, as Appl. No. 17/89,413.
Prior Publication US 2022/0136729 A1, May 5, 2022
Int. Cl. F24F 11/88 (2018.01); F24F 11/62 (2018.01); H02J 3/00 (2006.01); H02J 3/32 (2006.01); H02J 7/02 (2016.01)
CPC F24F 11/88 (2018.01) [F24F 11/62 (2018.01); H02J 3/00 (2013.01); H02J 3/32 (2013.01); H02J 7/02 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A power stealing circuit comprising:
rectification circuitry comprising an input terminal connected to an alternating current (AC) power source, a first output terminal, and a second output terminal;
a current limiting element connected to the first output terminal of the rectification circuitry;
an electrical energy storage element connected between the current limiting element and a circuit ground and configured to receive electrical energy from the rectification circuitry through the current limiting element;
a rectifier isolation circuit connected to the second output terminal of the rectification circuitry and configured to connect or disconnect the second output terminal of the rectification circuitry from the circuit ground; and
a second circuit configured as a power trickle circuit, the power trickle circuit configured to draw power from the AC power source while the load is energized, the power trickle circuit further configured to not draw power from the AC power source while the load is de-energized,
wherein the power stealing circuit is configured to draw power from the AC power source while a load is de-energized; and
wherein the power stealing circuit is configured to not draw power from the AC power source while the load is energized.