Inventor · disambiguated record
Lifeng Qiao
Also filed as: QIAO LIFENG
16 granted patents·4 pending applications·13 citations·filing 2011–2022
86Inventor score
Top patents by PatentIndex Score
20 records- 0187US10367496B2Gate voltage control circuit of insulated gate bipolar transistor and control method thereofDELTA ELECTRONICS SHANGHAI CO·Filed 2018·Granted Jul 30, 2019·5 cites·8 claims
- 0287US10234880B1Active clamp circuit for power semiconductor switch and power converter using the sameDELTA ELECTRONICS SHANGHAI CO·Filed 2018·Granted Mar 19, 2019·8 cites·18 claims
- 0368US11921148B2Method and device for monitoring partial dischargeDELTA ELECTRONICS SHANGHAI CO·Filed 2022·Granted Mar 5, 2024·0 cites·18 claims
- 0466US2023068564A1Conversion system and conversion deviceDELTA ELECTRONICS SHANGHAI CO·Filed 2022·Application pending·0 cites
- 0565US11515806B2Conversion device having reduced common-mode currentDELTA ELECTRONICS SHANGHAI CO·Filed 2021·Granted Nov 29, 2022·0 cites·12 claims
- 0660US11336274B2Clamp circuit and power module using the sameDELTA ELECTRONICS SHANGHAI CO·Filed 2020·Granted May 17, 2022·0 cites·13 claims
- 0755US12363819B2System for driving power devicesDELTA ELECTRONICS SHANGHAI CO·Filed 2022·Granted Jul 15, 2025·0 cites·28 claims
- 0854US9893525B1High-power conversion systemDELTA ELECTRONICS SHANGHAI CO·Filed 2017·Granted Feb 13, 2018·0 cites·18 claims
- 0953US11515777B2Cascaded conversion system and voltage equalizing control method thereofDELTA ELECTRONICS SHANGHAI CO·Filed 2021·Granted Nov 29, 2022·0 cites·21 claims
- 1053US10943754B2Circuit breaker apparatus and systemDELTA ELECTRONICS SHANGHAI CO·Filed 2019·Granted Mar 9, 2021·0 cites·20 claims
- 1153US10622986B2Gate voltage control circuit of insulated gate bipolar transistor and control method thereofDELTA ELECTRONICS SHANGHAI CO·Filed 2019·Granted Apr 14, 2020·0 cites·8 claims
- 1249US11063427B2DC transmission apparatus, surge control circuit and methodDELTA ELECTRONICS SHANGHAI CO·Filed 2019·Granted Jul 13, 2021·0 cites·20 claims
- 1349US2023216423A1Power converterDELTA ELECTRONICS SHANGHAI CO·Filed 2022·Application pending·0 cites
- 1446US12003192B2Converter and method for suppressing loop interference of converterDELTA ELECTRONICS SHANGHAI CO·Filed 2022·Granted Jun 4, 2024·0 cites·16 claims
- 1545US11824526B2Circuit and control method for preventing false turn-on of semiconductor switching deviceDELTA ELECTRONICS SHANGHAI CO·Filed 2022·Granted Nov 21, 2023·0 cites·19 claims
- 1644US11509239B2Conversion device having reduced size and costDELTA ELECTRONICS SHANGHAI CO·Filed 2021·Granted Nov 22, 2022·0 cites·12 claims
- 1742US10056821B2Power conversion system and method for suppressing the common-mode voltage thereofDELTA ELECTRONICS SHANGHAI CO·Filed 2017·Granted Aug 21, 2018·0 cites·22 claims
- 1840US2025230035A1Microphone structure, packaging structure, and electronic apparatusMEMSENSING MICROSYSTEMS SUZHOU CHINA CO LTD·Filed 2022·Application pending·0 cites
- 1938US2012047083A1Fire Situation Awareness And Evacuation SupportQIAO LIFENG·Filed 2011·Application pending·0 cites
- 2034US10873253B2Discharge control method for bus capacitor in power converterDELTA ELECTRONICS SHANGHAI CO·Filed 2017·Granted Dec 22, 2020·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →