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Topology of the multicell multilevel inverters are one of the most promising power converter topologies being successfully commercialized in the high-power market. This paper proposes a new cascaded multicell multilevel converter with a reduced count of power switches. The proposed reduced-switch-count multilevel is formed by connecting two distinct power conversion stages through two low-frequency...
This paper presents a novel generalized topology of a multilevel inverter. The proposed topology is obtained by extending the developed H-bridge topology. The proposed topology is competent to generate the optimum number of output voltage levels by using minimum number of dc voltage sources. The topology offers reduced value of voltage stress on semiconductor power switches. Utilization of dc voltage...
In this paper, power losses of 3-level NPC inverter (3LNPCI) and 3-level T-type inverter (3LTI) are classified and calculated according to the switching states. The conduction loss depends on modulation index (MI) and power factor (PF), whereas the switching loss depends on switching frequency, so the power loss analyses have been done at the different operating points of MI, PF, and switching frequency...
Standard Voltage Source Inverters (VSI) operates with a DC voltage source greater than the peak voltage of the AC source and Current Source Inverters (CSI) with a DC voltage source lower than the peak voltage of the AC source. This paper shows how several topologies of reversible AC/DC buck-boost inverters which do not suffer from such constraints can be compared on the basis of semiconductor and...
This paper investigates two diagnosis methods based on switching voltage pattern for IGBTs open-circuit faults in voltage-source inverters. One is based on bridge arm pole voltage, and the other is based on bridge arm line voltage. With extra simple circuit, these two diagnosis methods can detect and identify single and multiple open-circuit faults of the inverter IGBTs effectively. The comparison...
As the increase of large-scale distributed generation system, the interest in the efficiency of the inverter has been higher. In this paper, the power losses are classified and calculated according to the switching states of the three level NPC inverter and three level T-type inverter. And they are compared with the results from the PSiM thermal module simulation. These power loss comparisons are...
The basic performance of multilevel inverters is synthesizing a proper output voltage level by using several DC sources in the input. By increasing the number of levels in the output, the generated output voltage has smaller steps, which leads to better quality output waveform. The main problem of multilevel inverters is the high power switches necessity. This paper proposes a new non-isolated DC...
This paper presents a monolithic integration approach of a generic power converter (DC/AC or AC/DC (Fig. 1a)). The integration approach is verified for the case of an H-bridge inverter application through 2D simulations. Experimental characterization results are provided for the common anode three-pole chip and for RC-IGBT structures. The work presented in this paper constitutes a continuation for...
This paper shows ways of improving the efficiency of the electric traction drive in a battery electric vehicle at partial load operation referring to electric machine and power electronics. Improved components are compared to those typically used in an electric vehicle in terms of energy efficiency. Further advantages, economic impact and optimization strategies of the newly developed components are...
Conergy NPC topology is a new topology derived from classical NPC topology. Due to its higher efficiency, less components and better EMI performance compared with three phase full bridge topology and classical NPC topologies, it was already used in photovoltaic inverters and other power electrical applications. This paper conducts a comparison between traditional NPC topology and Conergy NPC topology...
This paper introduces the design and simulation of Photovoltaic DC/DC transform circuit and three-phase DC/AC inverter, the parameters are introduced, and the simulation results are analyzed.
Due to the very large difference between electrical and thermal time constants, stimulation for resonantly operated DC-DC converters using physical or ideal switching model is very time-consuming or impossible with limited computational resources. In order to overcome this problem a novel thermal-electrical averaging model of resonantly operated DC-DC converters is proposed in this contribution. The...
With the progress of science and technology, a new generation of IGBT/IGCT power electronics module with good performance is developing rapidly with successful commercialization and serialization, gradually replacing the old power electronic devices in the range of medium-capacity. Therefore, the same type of HVIGBT should be adopted substitute for original GTO and corresponding domestic development...
Electromagnetic interference (EMI) in adjustable speed drives (ASD) with long feeders are of great significance today. Various simulation models have been developed for inverter, cable and motor. Also different simplifications degrees were adopted to ease the simulation burden. In this paper simplified time domain simulation models for inverter, cable and motor are analyzed, implemented and connected...
In this paper, physics-based IGBT and diode models are used to simulate two 3-phase VSI systems using different power modules in SABER. The device parameters for two standard SEMIKRON power modules, the 1200 V/75 A single chip module and the 1200 V/300 A multi-chip module, are extracted following parameterization procedure. The effects of three typical degradations are considered, including solder...
Due to always increasing commutation speed, parasitic parameters such as interconnection inductances and stray capacitors are directly linked to voltage surge, resonance and electromagnetic interference. To guide the selection of power components, assess low-inductive film capacitors and laminated bus bar, and in the end realize the high power density and high reliability for electrical vehicle inverters,...
A planar edge termination technique of trenched field limiting ring is investigated by using 2-dimensional numerical analysis and simulation. The better voltage blocking capability and reliability can be obtained by trenching the field-limiting ring site which would be implanted. The trench etch step makes the junction depth deeper so that junction curvature effect and surface breakdown are less happened...
The recessed gate IGBT has a lower on-state voltage drop compared with the DMOS IGBT, because it doesn't have a JFET region. But due to the electric field concentration in the corner of the gate edge, the breakdown voltage decreases.
This paper is concerned with the design and simulation of a pulse width modulation (PWM) rectifier for three-phase Permanent Magnetic motor drive. Based on the mathematical model of PWM rectifier, the dual-close-loop engineering design with decoupled feed-forward control is applied in the 3-phase voltage source rectifier. The objective to be reached is to realize unity power factor at the input ac...
This paper presents the fastest-ever-reported, real-time (RT) simulation of an AC drive on PC-cluster. The RT simulator is used to simulate a complete PMSM drive circuit in a hardware-in-the-loop (HIL) application. It consists of a PMSM fed by a 3-phase IGBT inverter, a DC link capacitor and a 3-phase diode bridge. This drive model runs in RT and is connected to an external controller by analog and...
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