US 12,244,133 B2
Solid state circuit breaker
Jumie Yuventi, Sacramento, CA (US); Bahman Sharifipour, Newington, NH (US); Liyang Zhang, Irvine, CA (US); and Bruno Bambaren, Mountain View, CA (US)
Assigned to Onx, Inc., Georgetown, TX (US)
Filed by ONX, INC., Carrollton, TX (US)
Filed on Mar. 25, 2024, as Appl. No. 18/615,986.
Application 18/615,986 is a division of application No. 16/898,962, filed on Jun. 11, 2020, granted, now 11,973,335.
Claims priority of provisional application 62/861,141, filed on Jun. 13, 2019.
Prior Publication US 2024/0235177 A1, Jul. 11, 2024
Int. Cl. H02H 9/08 (2006.01); H02H 1/00 (2006.01); H02H 3/08 (2006.01); H02H 9/02 (2006.01)
CPC H02H 3/08 (2013.01) [H02H 1/0007 (2013.01); H02H 9/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A solid state circuit breaker including a first terminal to receive an AC voltage and a second terminal to output the AC voltage, the solid state circuit breaker comprising:
a current limiting circuit coupled to the first terminal;
a coupled transistor pair coupled between the first terminal and the second terminal;
a driver circuit coupled to the transistor pair;
a sensing circuit coupled to the first terminal, the second terminal, and the driver circuit, wherein the sensing circuit is configured to sense a first voltage characteristic at the first terminal, to sense a second voltage characteristic at the second terminal, and to supply the first voltage characteristic and the second voltage characteristic to the driver circuit, and further wherein the driver circuit is configured to turn OFF the transistor pair in response to first voltage characteristic being outside a first acceptable range or the second voltage characteristic being outside a second acceptable range; and
a controller circuit coupled to the first terminal, the second terminal, and the current limiting circuit, wherein the controller circuit is configured to determine a voltage difference between an input voltage at the first terminal and an output voltage at the second terminal, and in response to the voltage difference being outside a third acceptable range generate a trip signal sent to the current limiting circuit, and further wherein the current limiting circuit shunts current from the sensing circuit in response to receiving the trip signal thereby changing the first voltage characteristic to be outside the first acceptable range such that the driver circuit turns OFF the transistor pair.