US 12,451,883 B2
Shoot through protection in motor drives with single supply gate drives
Nageswara Rao Kalluri, Bangalore (IN); Rajkumar Perumal, Bangalore (IN); Sridhar Katakam, Bangalore (IN); Surendra Somasekhar Valleru, Bangalore (IN); and Pravinsharma Kaliyannan Eswaran, Bangalore (IN)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jul. 17, 2023, as Appl. No. 18/222,620.
Claims priority of application No. 202241052245 (IN), filed on Sep. 13, 2022.
Prior Publication US 2024/0088891 A1, Mar. 14, 2024
Int. Cl. H03K 17/689 (2006.01); H02P 29/00 (2016.01); H03K 17/56 (2006.01)
CPC H03K 17/56 (2013.01) [H02P 29/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A switch control system, comprising:
a first voltage source configured to output a first source voltage on a first voltage line;
a first gate driver connected to a first gate control signal line to receive a first gate control signal, wherein the first gate driver is connected to the first voltage line to receive the first source voltage, and wherein the first gate driver is connected to a first terminal line to output a first gate voltage signal to a first terminal of a first switch;
a second gate driver connected to a second gate control signal line to receive a second gate control signal, wherein the second gate driver is connected to the first voltage line to receive the first source voltage, and wherein the second gate driver is connected to a second terminal line to output a second gate voltage signal to a second terminal of the first switch;
a second voltage source configured to output a second source voltage on a second voltage line;
a third gate driver connected to the first gate control signal line to receive the first gate control signal, wherein the third gate driver is connected to the second voltage line to receive the second source voltage, and wherein the third gate driver is connected to a third terminal line to output a third gate voltage signal to a first terminal of a second switch; and
a fourth gate driver connected to the second gate control signal line to receive the second gate control signal, wherein the fourth gate driver is connected to the second voltage line to receive the second source voltage, and wherein the fourth gate driver is connected to a fourth terminal line to output a fourth gate voltage signal to a second terminal of the second switch,
wherein each of the first gate driver, the second gate driver, the third gate driver, and the fourth gate driver includes shoot through protection (STP) configured to prevent the first switch and the second switch from ever both being closed at once even when the first gate control signal and the second gate control signal have a differential voltage of substantially zero with respect to each other, thereby preventing shoot voltages from a DC bus to ground through the first and second switches.