Huazhen Chai

Person

Caledonia, IL, US

People

Patents Grantslast 30 patents

Information Patent Grant
Active rectifier with phase locked varying switch frequencies
- Patent number 12,184,071
- Issue date Dec 31, 2024
- Hamilton Sundstrand Corporation
- Huazhen H. Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Active rectifier with phase locked varying switch frequencies
- Patent number 12,142,918
- Issue date Nov 12, 2024
- Hamilton Sundstrand Corporation
- Huazhen H. Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Circuit testing and diagnosis
- Patent number 11,879,931
- Issue date Jan 23, 2024
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Over-modulation pulse width modulation with maximum output and mini...
- Patent number 11,456,680
- Issue date Sep 27, 2022
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power converter PWM
- Patent number 11,368,106
- Issue date Jun 21, 2022
- Hamilton Sundstrand Corporation (HSC)
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Electrical device partial discharge monitoring
- Patent number 11,163,013
- Issue date Nov 2, 2021
- Hamilton Sundstrand Corporation
- Huazhen Chai
- G01 - MEASURING TESTING
Information Patent Grant
Variable frequency voltage regulated AC-DC converters
- Patent number 11,042,175
- Issue date Jun 22, 2021
- Hamilton Sundstrand Corporation
- Huazhen Chai
- G05 - CONTROLLING REGULATING
Information Patent Grant
Laminated bus bars
- Patent number 10,998,706
- Issue date May 4, 2021
- Hamilton Sundstrand Corporation
- Robert C. Cooney
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
System for and method of controlling inrush current between a power...
- Patent number 10,847,970
- Issue date Nov 24, 2020
- Hamilton Sundstrand Corporation
- Frank Z. Feng
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
System for controlling inrush current between a power source and a...
- Patent number 10,833,502
- Issue date Nov 10, 2020
- Hamilton Sundstrand Corporation
- Frank Z. Feng
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Fault detection and isolation in generator modules
- Patent number 10,746,803
- Issue date Aug 18, 2020
- HAMILTON SUNSTRAND CORPORATION
- Huazhen Chai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Alternate grounding of inverter midpoint for three level switching...
- Patent number 10,523,130
- Issue date Dec 31, 2019
- Hamilton Sundstrand Corporation
- Randall Bax
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Heat pipe system for engine rotor cooling
- Patent number 10,443,388
- Issue date Oct 15, 2019
- Hamilton Sundstrand Corporation
- Debabrata Pal
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Grant
Magnetically coupled contactless damper
- Patent number 10,320,358
- Issue date Jun 11, 2019
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Power filter arrangement having a toroidal inductor package
- Patent number 10,164,598
- Issue date Dec 25, 2018
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Detection of damper resistor degradation and failures
- Patent number 10,126,350
- Issue date Nov 13, 2018
- HAMILTON SUNSTRAND CORPORATION
- Huazhen Chai
- G01 - MEASURING TESTING
Information Patent Grant
Controlling aircraft VFG over voltage under fault or load-shed
- Patent number 10,044,305
- Issue date Aug 7, 2018
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Circuit with current sharing alternately switched parallel transistors
- Patent number 9,912,279
- Issue date Mar 6, 2018
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Thermal stress reduction in aircraft motor controllers
- Patent number 9,435,263
- Issue date Sep 6, 2016
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Thermal stress reduction in aircraft motor controllers
- Patent number 9,435,264
- Issue date Sep 6, 2016
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Thermal stress reduction in aircraft motor controllers
- Patent number 8,786,232
- Issue date Jul 22, 2014
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Active AC inrush current control
- Patent number 8,630,078
- Issue date Jan 14, 2014
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Active transient current control in electronic circuit breakers
- Patent number 8,614,870
- Issue date Dec 24, 2013
- Hamilton Sundstrand Corporation
- Mustansir Kheraluwala
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Control of pole-change induction motors
- Patent number 8,294,409
- Issue date Oct 23, 2012
- Hamilton Sundstrand Corporation
- Waleed Said
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Patents Applicationslast 30 patents

Information Patent Application
ACTIVE RECTIFIER WITH PHASE LOCKED VARYING SWITCH FREQUENCIES
- Publication number 20240405552
- Publication date Dec 5, 2024
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen H. Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Reactive Current Injenction for Active Aerospace Rectification
- Publication number 20240405572
- Publication date Dec 5, 2024
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen H. CHAI
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
TRANSIENT VOLTAGE SUPPRESSOR CONDITION MONITORING
- Publication number 20230366952
- Publication date Nov 16, 2023
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- G01 - MEASURING TESTING
Information Patent Application
CIRCUIT TESTING AND DIAGNOSIS
- Publication number 20230064503
- Publication date Mar 2, 2023
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
OVER-MODULATION PULSE WIDTH MODULATION WITH MAXIMUM OUTPUT AND MINI...
- Publication number 20210351689
- Publication date Nov 11, 2021
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
POWER CONVERTER PWM
- Publication number 20210297010
- Publication date Sep 23, 2021
- Hamilton Sundstrand Corporation (HSC)
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
ELECTRICAL DEVICE PARTIAL DISCHARGE MONITORING
- Publication number 20210132157
- Publication date May 6, 2021
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- G01 - MEASURING TESTING
Information Patent Application
LAMINATED BUS BARS
- Publication number 20210104882
- Publication date Apr 8, 2021
- HAMILTON SUNDSTRAND CORPORATION
- Robert C. Cooney
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
VARIABLE FREQUENCY VOLTAGE REGULATED AC-DC CONVERTERS
- Publication number 20210041901
- Publication date Feb 11, 2021
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- G05 - CONTROLLING REGULATING
Information Patent Application
FAULT DETECTION AND ISOLATION IN GENERATOR MODULES
- Publication number 20200182934
- Publication date Jun 11, 2020
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- G01 - MEASURING TESTING
Information Patent Application
SYSTEM FOR CONTROLLING INRUSH CURRENT BETWEEN A POWER SOURCE AND A...
- Publication number 20190229527
- Publication date Jul 25, 2019
- HAMILTON SUNDSTRAND CORPORATION
- Frank Z. Feng
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
SYSTEM FOR AND METHOD OF CONTROLLING INRUSH CURRENT BETWEEN A POWER...
- Publication number 20190229524
- Publication date Jul 25, 2019
- HAMILTON SUNDSTRAND CORPORATION
- Frank Z. Feng
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
ALTERNATE GROUNDING OF INVERTER MIDPOINT FOR THREE LEVEL SWITCHING...
- Publication number 20190229643
- Publication date Jul 25, 2019
- HAMILTON SUNDSTRAND CORPORATION
- Randall Bax
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
MAGNETICALLY COUPLED CONTACTLESS DAMPER
- Publication number 20180234071
- Publication date Aug 16, 2018
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
CONTROLLING AIRCRAFT VFG OVER VOLTAGE UNDER FAULT OR LOAD-SHED
- Publication number 20180183371
- Publication date Jun 28, 2018
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
HEAT PIPE SYSTEM FOR ENGINE ROTOR COOLING
- Publication number 20180179896
- Publication date Jun 28, 2018
- HAMILTON SUNDSTRAND CORPORATION
- Debabrata Pal
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
DETECTION OF DAMPER RESISTOR DEGRADATION AND FAILURES
- Publication number 20180080972
- Publication date Mar 22, 2018
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- G01 - MEASURING TESTING
Information Patent Application
POWER FILTER ARRANGEMENT HAVING A TOROIDAL INDUCTOR PACKAGE
- Publication number 20180048278
- Publication date Feb 15, 2018
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Application
CIRCUIT WITH CURRENT SHARING ALTERNATELY SWITCHED PARALLEL TRANSISTORS
- Publication number 20170033721
- Publication date Feb 2, 2017
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
THERMAL STRESS REDUCTION IN AIRCRAFT MOTOR CONTROLLERS
- Publication number 20140253005
- Publication date Sep 11, 2014
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THERMAL STRESS REDUCTION IN AIRCRAFT MOTOR CONTROLLERS
- Publication number 20140250910
- Publication date Sep 11, 2014
- HAMILTON SUNDSTRAND CORPORATION
- Huazhen Chai
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
THERMAL STRESS REDUCTION IN AIRCRAFT MOTOR CONTROLLERS
- Publication number 20130278229
- Publication date Oct 24, 2013
- Hamilton Sundstrand Corporation
- Huazhen Chai
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Application
ACTIVE TRANSIENT CURRENT CONTROL IN ELECTRONIC CIRCUIT BREAKERS
- Publication number 20120182656
- Publication date Jul 19, 2012
- Mustansir Kheraluwala
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
CONTROL OF POLE-CHANGE INDUCTION MOTORS
- Publication number 20120043921
- Publication date Feb 23, 2012
- Hamilton Sundstrand Corporation
- Waleed Said
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
ACTIVE AC INRUSH CURRENT CONTROL
- Publication number 20120026636
- Publication date Feb 2, 2012
- Hamilton Sundstrand Corporation
- Huazhen Chai
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER

Huazhen Chai

Person

Patents Grantslast 30 patents

Active rectifier with phase locked varying switch frequencies

Active rectifier with phase locked varying switch frequencies

Circuit testing and diagnosis

Over-modulation pulse width modulation with maximum output and mini...

Power converter PWM

Electrical device partial discharge monitoring

Variable frequency voltage regulated AC-DC converters

Laminated bus bars

System for and method of controlling inrush current between a power...

System for controlling inrush current between a power source and a...

Fault detection and isolation in generator modules

Alternate grounding of inverter midpoint for three level switching...

Heat pipe system for engine rotor cooling

Magnetically coupled contactless damper

Power filter arrangement having a toroidal inductor package

Detection of damper resistor degradation and failures

Controlling aircraft VFG over voltage under fault or load-shed

Circuit with current sharing alternately switched parallel transistors

Thermal stress reduction in aircraft motor controllers

Thermal stress reduction in aircraft motor controllers

Thermal stress reduction in aircraft motor controllers

Active AC inrush current control

Active transient current control in electronic circuit breakers

Control of pole-change induction motors

Patents Applicationslast 30 patents

ACTIVE RECTIFIER WITH PHASE LOCKED VARYING SWITCH FREQUENCIES

Reactive Current Injenction for Active Aerospace Rectification

TRANSIENT VOLTAGE SUPPRESSOR CONDITION MONITORING

CIRCUIT TESTING AND DIAGNOSIS

OVER-MODULATION PULSE WIDTH MODULATION WITH MAXIMUM OUTPUT AND MINI...

POWER CONVERTER PWM

ELECTRICAL DEVICE PARTIAL DISCHARGE MONITORING

LAMINATED BUS BARS

VARIABLE FREQUENCY VOLTAGE REGULATED AC-DC CONVERTERS

FAULT DETECTION AND ISOLATION IN GENERATOR MODULES

SYSTEM FOR CONTROLLING INRUSH CURRENT BETWEEN A POWER SOURCE AND A...

SYSTEM FOR AND METHOD OF CONTROLLING INRUSH CURRENT BETWEEN A POWER...

ALTERNATE GROUNDING OF INVERTER MIDPOINT FOR THREE LEVEL SWITCHING...

MAGNETICALLY COUPLED CONTACTLESS DAMPER

CONTROLLING AIRCRAFT VFG OVER VOLTAGE UNDER FAULT OR LOAD-SHED

HEAT PIPE SYSTEM FOR ENGINE ROTOR COOLING

DETECTION OF DAMPER RESISTOR DEGRADATION AND FAILURES

POWER FILTER ARRANGEMENT HAVING A TOROIDAL INDUCTOR PACKAGE

CIRCUIT WITH CURRENT SHARING ALTERNATELY SWITCHED PARALLEL TRANSISTORS

THERMAL STRESS REDUCTION IN AIRCRAFT MOTOR CONTROLLERS

THERMAL STRESS REDUCTION IN AIRCRAFT MOTOR CONTROLLERS

THERMAL STRESS REDUCTION IN AIRCRAFT MOTOR CONTROLLERS

ACTIVE TRANSIENT CURRENT CONTROL IN ELECTRONIC CIRCUIT BREAKERS

CONTROL OF POLE-CHANGE INDUCTION MOTORS

ACTIVE AC INRUSH CURRENT CONTROL