Inventor
SIGAMANI JAMES
PH28 patents
⚠️ This page may combine multiple inventors who share the name “SIGAMANI JAMES”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ASTEC INT LTD
23 patentsUS7596007B2Sep 29, 2009
Multiphase DC to DC converter
ASTEC INT LTD63 citations95
US10742123B1Aug 11, 2020
Low common mode noise transformers and switch-mode DC-DC power converters
ASTEC INT LTD18 citations94
US7616464B2Nov 10, 2009
Reverse current control system for a power converter
ASTEC INT LTD27 citations92
US10224828B1Mar 5, 2019
DC-DC power converters and methods of operating DC-DC power converters
ASTEC INT LTD27 citations90
US11108329B1Aug 31, 2021
Switch-mode power supplies including three-level LLC circuits for low line and high line operation
ASTEC INT LTD9 citations85
US9240724B2Jan 19, 2016
Multiphase DC/DC converters and control circuits for controlling converters using fixed and/or variable frequencies
ASTEC INT LTD10 citations84
US9450496B2Sep 20, 2016
Multi-stage power converters and methods for varying a regulated voltage of one stage as a function of an output current of another stage
ASTEC INT LTD11 citations82
US12101032B2Sep 24, 2024
Multi-phase voltage converter current balancing
ASTEC INT LTD2 citations73
US11652424B2May 16, 2023
Switch-mode power supplies including three-level LLC circuits
ASTEC INT LTD3 citations73
US11557976B2Jan 17, 2023
Three-phase LLC power supply circuit for high voltage bus input
ASTEC INT LTD3 citations73
US11146176B2Oct 12, 2021
Switch-mode power supplies including three-level LLC circuits
ASTEC INT LTD5 citations73
US11121633B2Sep 14, 2021
Low common mode noise transformers and switch-mode DC-DC power converters
ASTEC INT LTD2 citations73
US11251705B2Feb 15, 2022
Controlling reverse current in switched mode power supplies to achieve zero voltage switching
ASTEC INT LTD2 citations71
US9906121B2Feb 27, 2018
Control circuits and methods for transitioning between power converter control modes
ASTEC INT LTD2 citations71
US11848616B2Dec 19, 2023
Three-phase LLC power supply circuit for high voltage bus input
ASTEC INT LTD0 citations62
US11601060B2Mar 7, 2023
Switch-mode power supplies including three-level LLC circuits for low line and high line operation
ASTEC INT LTD1 citations62
US11283365B2Mar 22, 2022
Switch-mode power supplies including three-level LLC circuits
ASTEC INT LTD1 citations62
US9065325B2Jun 23, 2015
Control circuits for power converters
ASTEC INT LTD2 citations61
US11817783B2Nov 14, 2023
Controlling reverse current in switched mode power supplies to achieve zero voltage switching
ASTEC INT LTD1 citations57
US12580487B2Mar 17, 2026
Integrated current balancing in coupled transformers
ASTEC INT LTD0 citations53
US9906135B2Feb 27, 2018
Multiphase DC/DC converters and control circuits for controlling converters using fixed and/or variable frequencies
ASTEC INT LTD0 citations52
US11749433B2Sep 5, 2023
Transformers having integrated magnetic structures for power converters
ASTEC INT LTD0 citations50
US10476393B2Nov 12, 2019
Modifiable DC-DC power converters for providing different output voltages
ASTEC INT LTD0 citations41