• Suvik Electronics Private Limited

H-Bridge Multi-Level Inverter

Suvik Electronics offers H-Bridge Multi-Level Inverter, Model N5000. This has been implemented successfully for high power motor drives by Hyundai Heavy Industries. This presents a cascaded H-bridge multi-level inverter for high-power motor drives. The main features of this inverter are as follows: the reduction of harmonic injection into the utility by means of specially designed multi-winding transformers; the generation of near-sinusoidal voltages with only low frequency switching; almost no common-mode voltage; and low dv/dt at output voltage, nothing of significant over-voltage on motor terminal even if the distance between inverter and motor is long. Many N5000 inverters are successfully working at local and foreign sites such as power plants, incineration plants, sewage water treatment plants and oil pumping stations, etc. Main features: motor friendly, power source friendly, directly drive medium voltage AC motor; high performance, high reliability, high efficiency/high power factor; user friendly maintenance; powerful and easy-to-use operation; and full range line-up. Input transformer and power cell: multi-winding transformer with 36 pulse rectification, modularisation of power cell. Configuration of power circuit and controller: series connection of single-phase IGBT inverters, communication based on a standard serial communication protocol: CAN, reliable fibre-optic coupling for communication between the master and cell controller, distribution control, vector cont rol composed of main controller, cell controller and CAN communication. Power source and motor friendly: greatly reduced harmonic injection into the utility by means of specially designed multi-winding transformers, output waveform is close to the perfect sine wave.