MVD

MVD ---IGBT technology - - High Power Density - - Modular Design - - Friendly HMI

Rongxin Power Electronic Co., Ltd (RXPE) is one of the China’s key high-tech enterprises, which engaged on MV high power electronic device R&D, design and manufacturing. RXPE’s products meet requirements from power generation, transmission and distribution to the terminal load, provide solutions for improving power quality, optimizing control, saving energy.

RXPE is China’s leading supplier of high-power electronics equipment. The products are widely used in electricity, metallurgy, coal, nonferrous metals, electric railway, wind power generation, petrochemical, shipping and other areas, user are all over China. The products have been exported to E.U. countries like Germany, Italy, Turkey, Asian countries like India, Vietnam, Thailand, African countries like Nigeria, Egypt and South American countries like Brazil.

RXPE has a top-rated R&D team and an advanced and comprehensive power electronics test facility, including a 66KV/10000kVA high-voltage substation, high-voltage frequency conversion Full-load Test Center, meeting the needs of inspection from simulation (RTDS) to the full-load experimental testing RXPE has strong capability for independent innovation, possessing nearly 40 patents and 10 software copyrights and has completed 23 significant scientific research projects and formulated two national standards.

RXPE will remain consistently devoted to innovation in technology and contribute to creating value for customers and sustainable social development.

MVC of RXPE is the 6KV/800-8000KVA series middle-voltage motor energy saving speed product (including mine hoist traction-type middle-voltage inverter, etc.) developed using currently international advanced IGBT power module series multilevel technology, digital control technology, SPWM pulse width modulation technology and superconducting heat pipe cooling technology, voltage multi-module series technology and vector control technology.It has features of high efficiency and energy saving, high power factor and high reliability, and is widely used in coal, metallurgy, electric power, building materials, petroleum, chemical industry, papermaking, water supply and drainage and other industries, to achieve variable speed operation and optimized control of middle-voltage motor.

Company Strength

A wide range of Applications

RXPE MV Variable Frequency Drive can be used for a wide range of industrial driven loads and are suitable for various industrial sites including:

Power Plant

Belt conveyor, Draught Fan, Blower, Dust Suction Blower, Compressor, Dredge Pump, Feed Pump

Petroleum and Chemical Industries

Main pipe pump, water injection pump, boiler feed pump, electro dive pump, Brine Pump, Draught Fan and waste-removal pump

Coal Mine

Main Hoist, Chippy Hoist, Belt Conveyor, Main Blower, Water Pump

Metallurgy

Exhaust Fan, Dust Fan, Blower, Slurry Pump, Roller, Compressor, Water Pump, Descaling Pump

Municipal Engineering

Heating Furnace Blower and Water Pump

Sewage Treatmetn

Sewage-Removal Pump, Self-Fractioning Pump

Cement

Kiln Draught Fan, Dust Suction Machine of coller, Running Milling for Raw Material, Kiln Air Supply Blower, Exhaust Fan of cooler, Separator Fan, Suction Machine Fan

Paper Making Plant

Strip Engine, Paste Mill, Pulverizer, Rewinder

Pharmacy

Scavenging Pump

Rubber Production

Mixer Machine

Product Categories

RXPE MV VFDs are based on advanced power cells series connection topology. It has features such as high efficiency, high power factor, high level of safety and reliability and so on. It can achieve the smart, efficient and energy-saving operation of MV motors.

Integrated Design

The RMVC product has an integrated design, compact in structure, power cells and input transformer are forward and backward installation. This type of design greatly improves the space utilization.

High Power Density

High power density and modular design has yielded significant improvements in space optimization and efficiency of heat dissipation.

Modular Design

The modular design, using quick connect and disconnect power terminations, make replacement of major components, easy for maintenance.

Vector Control

When used to control dynamic loads, the MV variable frequency drive uses modern open or closed loop flux vector control to adjust its output frequency and voltage continuously. This achieves high dynamic performance, fast response, wide range of speed regulation, and fast acceleration and deceleration of MV motors.

HMI simple control

 

A Touch screen HMI with MCGS configuration software is used for communication with the main controller, allowing users to monitor the operation and fault alarm conditions of the MV variable frequency drives in a more intuitive way. Parameters and fault records are directly viewed via the touch screen. It also supports remote monitoring and a multi-language interface.

Technical Features

Display and recording of operating data

Self diagnosis

Complete protection system

Closed loop control

Flying start

Dual-route control power supply

High power factor

Sensor-less vector control

Vector control for synchronous motors

Synchronized bypass grid connection

Master-slave control

Low noise

Multi-language HMI

Function

Energy saving

Speed Regulation

No impact

Soft start

Optimal control

The RXPE MVC is a medium voltage multilevel converter constructed by the cascade connection of single phase H-bridge inverters in series to achieve the required medium voltage output. Each single phase inverter receive input DC power from it’s own isolated 3-phase rectifier, itself fed from a separate transformer secondary. Each rectifier and associated inverter is assembled into and identical power module. The input transformer is an integral part of the MVC cabinet with multiple isolated secondary windings to supply the power modules. Each transformer secondary is wound with a different phase displacement angle in order to achieve an effective high pulse number rectifier resulting in a significant reduction of input current harmonic distortion.

Topology Diagram

High Quality Output Waveform

A)     The output of MV converter has a good sinusoidal waveform and low dv/dt, which do not damage insulation of motor and cables.

B)      Do not need output harmonic filters, and do not require special limitation for the length of output cables. Since harmonic losses of motors are reduced greatly, that eliminates vibration of bearing and fan blades caused by harmonics.

 

 

 

  

Technical Specification

After-sales service

We have a professional service team; each staff of the team has received thoroughly and professional training. Our staffs are qualified to provide you for various onsite services such as; Installation, Guidance; Maintenance and Troubleshooting.

24 x 7 x 365 service available

Transformation

Maintenance & Replacement

Training

Customerization services

Spares

Updating

Preventive Maintenance

MVD