Inventor

LIU YUNFENG

CN58 patents

⚠️ This page may combine multiple inventors who share the name “LIU YUNFENG”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

LIU YUNFENG

HUAWEI DIGITAL POWER TECH CO LTD

Vehicle, control method for vehicle suspension, and related device

Coupled inductor structure

Inverter and inverter control method

Photovoltaic system, relay detection method, and power supply system

Three-level boost converter and control method

Direct current combiner box, photovoltaic power generation system, and fault detection method

Packaged power semiconductor device and power converter

Bidirectional direct current converter and control method thereof

Resonant switched capacitor converter and control method thereof

Energy storage system, on/off-grid switching method, and power conversion system

Power converter and method for controlling power converter

Packaged device, packaged module, and power conversion device

HUAWEI TECH CO LTD

Power conversion circuit and power conversion system

Multi-level inverter and power supply system

Coupled inductor and power converter

Fast charging method, terminal, charger, and system with open loop control

Photovoltaic power system and control method thereof

Multilevel converter and power supply system

Photovoltaic power system and control method thereof

Solar cell and electronic device

Method for processing direct current electric arc and apparatus

Control method and apparatus for common-mode modulated wave of single-phase five-level inverter

FUTUREWEI TECHNOLOGIES INC

Multi-channel inverter systems

Multi-level inverter apparatus and method

Multi-level inverter systems

Coupled inductor structure

Multi-channel inverter systems including coupled inductors

Multi-channel inverter systems including coupled inductors

GEN ELECTRIC

High-voltage power generation system and package

Ultra low output impedance RF power amplifier for parallel excitation

Neutral point clamped converter control system and control method and compensation unit

Electrodialysis device and process

Power supply for supplying multi-channel, stable, isolated DC power and method of making same

Class-E amplifier and lighting ballast using the amplifier

UNIV BEIJING SCIENCE & TECHNOLOGY

Methods for optimizing bunch distance of fractured horizontal wells of shale gas

Method for identifying a medium structure coupling and a fracture network morphology of a shale gas reservoir

SHENZHEN MINDRAY BIOMEDICAL ELECTRONICS CO LTD

Sampling pumps and gas analyzers

Sampling pumps and gas analyzers

DELTA ELECTRONICS INC

Method and system for controlling DC bus voltage

Converter system and method

HU MIN

System and method for power charging or discharging

CHAN PETER

Method and system for a traffic management network

YUAN XIAOMING

System and method for converter switching frequency control

Baidu online network technology beijing co ltd

Method and apparatus for generating video

LIU YUNFENG

Chatting system, method and apparatus for virtual pet

MAO SAIJUN

System and method for driving light emitting diodes

SONICWALL INC

Method of creating high availability for single point network gateway using containers

APOLLO INTELLIGENT CONNECTIVITY BEIJING TECHNOLOGY CO LTD

Method of presenting information for vehicle, electronic device, and storage medium

UNIV DALIAN TECH

Method for judging rotating characteristics of light sources based on summation calculation in visible light indoor positioning

DELTA ELECTRONICS SHANGHAI CO

Time-sharing wave recording method