Search results for: Jinwu Gong

Items from 1 to 17 out of 17 results

article

A Regenerative Hexagonal-Cascaded Multilevel Converter for Two-Motor Asynchronous Drive

Pan Wang, Fei Liu, Xiaoming Zha, Jinwu Gong, more

IEEE Journal of Emerging and Selected Topics in Power Electronics > 2017 > 5 > 4 > 1687 - 1699

This paper presents a hexagonal-cascaded multilevel converter for two-motor asynchronous drive application. By adding an ac input to the hexagonal configuration, this multilevel converter becomes a tri-port system with one input port and two output ports, which can drive two motors with asynchronous operation by sending different control commands. The detailed analysis of power distribution is presented,...

article

Reliability-Oriented Optimization of the LC Filter in a Buck DC-DC Converter

Yi Liu, Meng Huang, Huai Wang, Xiaoming Zha, more

IEEE Transactions on Power Electronics > 2017 > 32 > 8 > 6323 - 6337

Lifetime is an important performance factor in the reliable operation of power converters. However, the state-of-the-art LC filter design of a buck dc–dc converter is limited to the specifications of voltage and current ripples and constrains in power density and cost without reliability considerations. This paper proposes a method to optimize the design of the LC filters from a reliability perspective,...

article

Asymmetrical carrier phase-shifted pulse-width modulation for partly regenerative converter

Xiaoming Zha, Zezhou Yang, Jinwu Gong, Shangsheng Li, more

IET Power Electronics > 2017 > 10 > 4 > 442 - 450

A cascaded H-bridge-based partly regenerative converter is a low-cost scheme to enable a medium-voltage motor drive to feed back the braking energy to the grid. However, its asymmetrical topology induces serious switching harmonic distortion on the motor side when conventional symmetrical carrier phase-shift pulse-width modulation (SCPS-PWM) is used. This study analyses switching harmonic characteristics...

chapter

Adaptability of weighted average current control to the weak grid considering the effect of grid-voltage feedforward

Jianjun Sun, Yi Wang, Jinwu Gong, Xiaoming Zha, more

2017 IEEE Applied Power Electronics Conference and Exposition (APEC) > 3530 - 3535

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

The weighted average current control (WACC) strategy has been widely used in LCL-filter-based grid connected inverters, because it can reduce the order of grid connected inverter system to the first order. However, when the LCL-filter-based inverter is connected to a weak grid with grid-voltage feedforward, the phase and gain margins of WACC will be significantly reduced, which leads to limited gain...

chapter

A segmented power distribution control system based on hybrid regenerative cascaded multilevel converter

Pan Wang, Fei Liu, Xiaoming Zha, Feiyang Zhu, more

2017 IEEE Applied Power Electronics Conference and Exposition (APEC) > 724 - 728

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

In order to realize motor's regenerated energy storage and reutilization, a segmented power distribution control system is proposed in this paper based on hybrid regenerative cascaded multilevel converter. The energy storage cells and ordinary cells are connected together to form a hybrid cascaded topology, which reduces the number of active front ends and secondary windings of phase-shifting transformer...

chapter

Regenerated energy recycling between two motors of asynchronous mode driven by hexagonal cascaded multilevel converter

Pan Wang, Fei Liu, Jinwu Gong, Wenjun Liu, more

2017 IEEE Applied Power Electronics Conference and Exposition (APEC) > 558 - 562

2017 IEEE Applied Power Electronics Conference and Exposition (APEC)

To utilize the regenerated energy directly among motor loads in industrial field, a hexagonal cascaded multilevel converter topology and its control strategy are proposed to drive two motors in asynchronous operation. An AC power supply is added to the traditional hexagonal configuration forming a tri-end system with one input port and two output ports, which can drive two asynchronous-operation motors...

chapter

Asymmetrical phase-shifting carrier pulse-width modulation for harmonics suppression in cascaded multilevel converter under unbalanced DC-link voltages

Shangsheng Li, Zezhou Yang, Qionglin Li, Jinwu Gong, more

2015 IEEE Energy Conversion Congress and Exposition (ECCE) > 6804 - 6810

2015 IEEE Energy Conversion Congress and Exposition

In a hybrid cascaded multilevel converter subject to different DC-link voltage levels among cascaded cells, should conventional carrier phase-shifting pulse-width modulation be applied, it will fail to multiply the equivalent switching frequency of the overall output voltage. As a consequence, this makes it more difficult to design the output filter and limits the overall output bandwidth. Based on...

chapter

Reliability-oriented design of LC filter in buck DC-DC converter

Yi Liu, Meng Huang, Huai Wang, Xiaoming Zha, more

2015 IEEE Energy Conversion Congress and Exposition (ECCE) > 1427 - 1433

2015 IEEE Energy Conversion Congress and Exposition

State-of-the-art LC filter design of buck DC-DC converter is based on the specifications of voltage and current ripples and constrains in power density and cost. Since lifetime is an important performance factor in reliability critical applications, this digest proposes a method to optimize the design of the LC filters from a reliability perspective, among other considerations. It investigates the...

chapter

Power recovery and cost reduction oriented optimization of regenerative cells embedded in cascaded multilevel converter

Juntao Yao, Fei Liu, Jinwu Gong, Xiaoming Zha

2015 IEEE Energy Conversion Congress and Exposition (ECCE) > 5117 - 5123

2015 IEEE Energy Conversion Congress and Exposition

The novel hybrid cascaded multilevel converter, with partial regenerative cells supplied by bidirectional rectifiers, is cost effective to recover the regenerative energy. To apply it in industrial fields containing various motors with loads, a systematic scheme designing the power cells is indispensable. This paper reveals that the maximum power factor angle of the motor is determined by the deceleration...

article

A Regenerative Cascaded Multilevel Converter Adopting Active Front Ends Only in Part of Cells

Jinwu Gong, Lan Xiong, Fei Liu, Xiaoming Zha

IEEE Transactions on Industry Applications > 2015 > 51 > 2 > 1754 - 1762

This paper studies a regenerative cascaded multilevel converter that substitutes active front ends for the diode-based front ends only in part of cells, and proposes a power tracking control strategy that does not need any motor parameters. During the induction motor's deceleration, by controlling the two kinds of cells' output voltages according to the motor's power factor angle, the converter makes...

article

Cascaded multilevel converter for medium-voltage motor drive capable of regenerating with part of cells

Xiaoming Zha, Lan Xiong, Jinwu Gong, Fei Liu

IET Power Electronics > 2014 > 7 > 5 > 1313 - 1320

A new regenerative cascaded multilevel converter and its control strategy based on V/f control has been presented. The converter employs insulated gate bipolar transistor-based rectifiers as active front end (AFE) only in part of cells and diode-based rectifiers in the rest cells. Those cells with AFE enable the converter to deliver the power generated by the motor to the grid. In the course of the...

article

Analysis and design of repetitive controller based on regeneration spectrum and sensitivity function in active power filter system

Jianjun Sun, Jinwu Gong, Baifeng Chen, Xiaoming Zha

IET Power Electronics > 2014 > 7 > 8 > 2133 - 2140

Conventional repetitive controller can hardly obtain a fast dynamic response. In order to achieve a faster dynamic performance, an improved repetitive controller is proposed in this study. The controller adds a proportional link in parallel with the original repetitive control loop. Based on the regeneration spectrum theory and the sensitivity function, the stability, steadystate error and convergence...

chapter

A novel partial units energy feedback cascaded multilevel inverter with bypass control

Juntao Yao, Fei Liu, Jinwu Gong, Shangsheng Li

2013 1st International Future Energy Electronics Conference (IFEEC) > 494 - 499

2013 1st International Future Energy Electronics Conference (IFEEC)

This paper proposes a novel composite cascaded multilevel inverter, of which uncontrolled converters and pulse-width modulation (PWM) converters are connected in parallel. The proposed composite inverter could reduce the cost as compared with the pure PWM inverter, realize energy two-way flow and simplify the structure design of the phase shifting transformer. This paper adopts bypass control strategy...

chapter

A regenerative cascaded multilevel converter with reduced active front ends

Lan Xiong, Xiaoming Zha, Fei Liu, Jinwu Gong

2013 IEEE Energy Conversion Congress and Exposition > 3941 - 3948

2013 IEEE Energy Conversion Congress and Exposition (ECCE)

This paper presents a new topology of cascaded multilevel converter which substitutes active front ends for the diode-based front ends only in part of cells making the converter regenerative. Its control strategy based on V/f control is developed. During the induction motor's deceleration, by controlling the phase difference of the output fundamental voltages of the two types of cells, the converter...

chapter

High-reliability and harmonic-sharing dual parallel topology for active power filter

Jianjun Sun, Baifeng Chen, Suxuan Guo, Xiaoming Zha, more

The 2nd International Symposium on Power Electronics for Distributed Generation Systems > 240 - 245

2010 2nd IEEE International Symposium on Power Electronics for Distributed Generation Systems (PEDG)

This paper chooses the proportional resonant controller for the controlling of Active Power Filter, and proposed a new control topology for dual parallel APF application. The APF_I near the load side employs the proportional resonant controller to compensate the 5^th, 11^th, 17^th and 23^rd harmonics; The APF_II near the system side also employs the proportional resonant controller to compensate the 7...

chapter

Realization and improvement of repetitive control in rotating frame for active power filter system

Baifeng Chen, Xiaoming Zha, Jinwu Gong, Suxuan Guo, more

2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) > 887 - 894

2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition - APEC 2010

The repetitive control, which is based on a delay of fundamental period, is widely used in grid-connected voltage-source converters, such as uninterruptible power supply (UPS), photovoltaic (PV) inverter and active power filter (APF). This paper presents four repetitive controllers in rotating frame for APF system, whose repetitive period is T, T/2, T/3, and T/6 respectively. Compared with traditional...

chapter

Analysis and realization of a fast repetitive controller in active power filter system

Jinwu Gong, Xiaoming Zha, Suxuan Guo, Baifeng Chen, more

2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition (APEC) > 1704 - 1710

2010 Twenty-Fifth Annual IEEE Applied Power Electronics Conference and Exposition - APEC 2010

The repetitive control and resonant control are widely used in grid-connected voltage-source converters recently, such as uninterruptible power supplies (UPS), photovoltaic inverter (PV) and active power filter (APF). This paper introduces a new repetitive control strategy in APF system, whose repetitive period is only one half of the traditional and could eliminate all odd harmonics as a bank of...

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Keywords

POWER HARMONIC FILTERS (5)
TOPOLOGY (5)
CAPACITORS (4)
HARMONIC ANALYSIS (4)
RECTIFIERS (4)
ACTIVE FILTERS (3)
ACTIVE POWER FILTER (3)
CONTROL SYSTEMS (3)
INDUCTION MOTORS (3)
SIMULATION (3)
VOLTAGE CONTROL (3)
ACTIVE POWER FILTER SYSTEM (2)
CAPACITOR (2)
DC-DC POWER CONVERTERS (2)
GRID-CONNECTED VOLTAGE-SOURCE CONVERTERS (2)
HARMONICS SUPPRESSION (2)
PHOTOVOLTAIC INVERTER (2)
POWER CONVERTORS (2)
POWER DISTRIBUTION (2)
POWER FILTERS (2)
PWM RECTIFIER (2)
REACTIVE POWER (2)
RELIABILITY ENGINEERING (2)
REPETITIVE CONTROL (2)
STEADY-STATE (2)
TWO-MOTOR ASYNCHRONOUS DRIVE (2)
UPS (2)
<ITALIC XMLNS:ALI="HTTP://WWW.NISO.ORG/SCHEMAS/ALI/1.0/" XMLNS:MML="HTTP://WWW.W3.ORG/1998/MATH/MATHML" XMLNS:XLINK="HTTP://WWW.W3.ORG/1999/XLINK" XMLNS:XSI="HTTP://WWW.W3.ORG/2001/XMLSCHEMA-INSTANCE">LC</ITALIC> FILTER (1)
AC MOTORS (1)
ACCELERATION (1)
ACPS-PWM METHOD (1)
ACTIVE FRONT END (1)
ADJUSTABLE SPEED DRIVES (1)
ASYMMETRICAL CARRIER PHASE-SHIFT PULSE-WIDTH MODULATION METHOD (1)
BUCK CONVERTER (1)
BYPASS CONTROL (1)
CAPACITANCE (1)
CASCADE MULTILEVEL (1)
CASCADED MULTILEVEL (1)
CASCADED MULTILEVEL CONVERTER (1)
CONTROL SYSTEM SYNTHESIS (1)
CONVERGENCE (1)
DC–DC CONVERTER (1)
DIGITAL PROCESSOR (1)
DOUBLE FOURIER SERIES (1)
ENERGY FEEDBACK (1)
ENERGY STORAGE CELLS (1)
FAST REPETITIVE CONTROLLER (1)
FEEDFORWARD (1)
FREQUENCY CONTROL (1)
FREQUENCY MODULATION (1)
HARMONIC COMPENSATION (1)
HARMONIC SHARING (1)
HEXAGONAL CASCADE MULTILEVEL CONVERTER (1)
HEXAGONAL-CASCADED MULTILEVEL CONVERTER (1)
HYBRID CASCADE (1)
HYBRID POWER SYSTEMS (1)
INDUCTORS (1)
INSULATED GATE BIPOLAR TRANSISTORS (1)
INTEGRATED CIRCUIT RELIABILITY (1)
INTEGRATED CIRCUITS (1)
INVERTERS (1)
ITERATIVE SOLUTION (1)
LCL FILLER (1)
LIFETIME (1)
LOW-FREQUENCY SWITCHING HARMONICS ELIMINATION (1)
MEDIUM-VOLTAGE MOTOR DRIVE (1)
MULTILEVEL CONVERTER (1)
PARALLEL TOPOLOGY (1)
PARTLY REGENERATIVE CONVERTER (1)
PHASE-SHIFTING CARRIER PWM (1)
POWER FLOW (1)
PROPORTIONAL RESONANT CONTROL (1)
PULSE WIDTH MODULATION (1)
PWM POWER CONVERTORS (1)
REACTIVE POWER CONTROL (1)
REGENERATED ENERGY RECYCLING (1)
REGENERATION (1)
REGENERATION LIMITATION (1)
REGENERATION SPECTRUM (1)
REGENERATION SPECTRUM METHODS (1)
REGENERATIVE ENERGY RECYCLING (1)
REGENERATIVE TOPOLOGY (1)
RELIABILITY (1)
RESONANT CONTROL (1)
ROTATING FRAME (1)
SENSITIVITY (1)
SENSITIVITY FUNCTION (1)
SENSITIVITY FUNCTION BASED ANALYSIS METHODS (1)
STABILITY ANALYSIS (1)
SUPER CAPACITORS (1)
SWITCHES (1)
SWITCHING FREQUENCY (1)
SWITCHING HARMONIC CHARACTERISTICS (1)
SWITCHING HARMONIC PERFORMANCE (1)
SYNCHRONOUS MOTORS (1)
THE WEIGHTED AVERAGE CURRENT CONTROL (1)
THRESHOLD VOLTAGE (1)
TRANSFER FUNCTIONS (1)
UNINTERRUPTIBLE POWER SUPPLIES (1)
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Search results for: Jinwu Gong

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