Extended T-type Inverter
Journal Title: Power Electronics and Drives - Year 2018, Vol 2018, Issue 1
Abstract
This paper presents a new concept of a power electronic converter – the extended T-type (eT) inverter, which is a combination of a three-phase inverter and a three-level dc/dc converter. Novel converter shows better performance than a comparable system composed of two converters: a T-type inverter and a boost converter. At first, the three-level dc/dc converter is able to boost the input voltage but also impacts on the neutral point potential. Operation prin-ciples of the eT inverter are explained and simulation study of the SiC-based 6 kVA system is presented in this paper. Presented results shows a serious reduction of the DC-link capacitors and the input inductor. Furthermore, suitable SiC power semiconductor devices are selected and power losses are estimated using Saber software in reference to a comparative T-type inverter. According to simulations, the 50 kHz/6 kVA inverter feed from the low voltage (250V) shows below 2,5 % of power losses with suggested SiC MOSFETs and Schottky diodes. Finally, a 6 kVA laboratory model was designed, built and tested. Conducted measurements show that despite low capacitance (2 x 30 µF/450 V) the neutral point potential is balanced and observed efficiency of the inverter is around 96%.
Authors and Affiliations
Jacek Rąbkowski, Rafał Kopacz
Keywords
Related Articles
- EP ID EP408042
- DOI 10.2478/pead-2018-0015
- Views 61
- Downloads 0
A NOVEL CONVERTER FOR VOLTAGE BALANCE IN A SERIES CONNECTED CAPACITORS AND BATTERIES.
This paper presents a novel concept and research results of a circuit for voltage balance of three series-connected capacitors or batteries. The problem is associated with control of voltage sharing on series capacitor,...
FUZZY ADAPTATION IN STATE SPACE CONTROLLER APPLIED FOR TWO-MASS SYSTEM
Background Development of efficient and simple and efficient control structures is important for real industrial applications. Additional feature, that is often required, deals with correct work of the control system und...
DIAGNOSTIC SYSTEM FOR INDUCTION MOTOR STATOR WINDING FAULTS BASED ON AXIAL FLUX
The article presents the results of research on the use of an axial flux in the diagnostics of induction motor stator winding fed by a frequency converter. Voltage signal waveforms proportional to the axial flux were reg...
VERTICAL TRANSPORTATION: HARMONICS EFFECTS OF DRIVES BY PM MACHINES
Motor drive is a widely used technology, offering many advantages, such as exceptional speed, torque control as well as greater flexibility. Improvement of reliability and efficiency has become a great research interest....
AN ARTIFICIAL NEURAL NETWORKS APPROACH TO STATOR CURRENT SENSOR FAULTS DETECTION FOR DTC-SVM STRUCTURE
Background: During last few years, fault-tolerant control systems (FTCS) [1] for electric motor drives became a very active research field for many research groups. The proper choice of the fault tolerant control algorit...