Lewei Qian

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Peoria, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Ground fault protection systems and methods
- Patent number 9,065,270
- Issue date Jun 23, 2015
- Caterpillar Inc.
- Lewei Qian
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Method for regulating temperature of transistor-based component
- Patent number 8,982,586
- Issue date Mar 17, 2015
- Caterpillar Inc.
- Lewei Qian
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Simplified topology for trolley assist-capable electric drive truck
- Patent number 8,874,294
- Issue date Oct 28, 2014
- Caterpillar Inc.
- Lewei Qian
- B60 - VEHICLES IN GENERAL
Information Patent Grant
System and method to thermally protect a transistor in an electric...
- Patent number 8,442,712
- Issue date May 14, 2013
- Caterpillar Inc.
- Lewei Qian
- B60 - VEHICLES IN GENERAL

Patents Applicationslast 30 patents

Information Patent Application
GROUND FAULT PROTECTION SYSTEMS AND METHODS
- Publication number 20140240875
- Publication date Aug 28, 2014
- Caterpillar Inc.
- Lewei QIAN
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Application
Simplified Topology For Trolley Assist-Capable Electric Drive Truck
- Publication number 20130325226
- Publication date Dec 5, 2013
- Caterpillar Inc.
- Lewei Qian
- B60 - VEHICLES IN GENERAL
Information Patent Application
System and method to thermally protect a transistor in an electric...
- Publication number 20130054059
- Publication date Feb 28, 2013
- Caterpillar Inc.
- Lewei Qian
- B60 - VEHICLES IN GENERAL
Information Patent Application
COOLING SYSTEM FOR AN ELECTRIC DRIVE MACHINE AND METHOD
- Publication number 20120230843
- Publication date Sep 13, 2012
- Caterpillar Inc.
- SREENIVASA RAVIPATI
- G05 - CONTROLLING REGULATING
Information Patent Application
METHOD FOR REGULATING TEMPERATURE OF TRANSISTOR-BASED COMPONENT
- Publication number 20120163055
- Publication date Jun 28, 2012
- Lewei Qian
- H03 - BASIC ELECTRONIC CIRCUITRY