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Measuring the load current of drive inverters is still inevitable for a precise current control. In common industrial and automotive inverters hall effect based current sensors are widely used. [1] The presented novel current measurement method is based on an inductive current sensor like a Rogowski coil. This can be fabricated much smaller and cheaper than hall based current sensors and can be integrated...
This paper presents a digital Active Gate Drive (AGD) methodology for power semiconductor devices. The inherent latency limitation of digital signal processing systems is addressed by a sequential optimization procedure that uses voltage and current signals recorded at the previous switching edge to develop an optimized gate drive waveform for the next switching edge. Experimental results using a...
Electric vehicles are steady returning to realization within the industrial market owing to their well-tried advantages in fuel economy and lower emission of pollutants. To fulfill increasing demand for higher dependability in power semiconductor converters applicable in electrical vehicles, fault detection (FD) and mitigation is a very important. During this study, a model-based on open semiconductor...
In this paper, a new basic unit for cascaded multilevel inverter is proposed. The proposed basic unit consists of m cells. Each cell can generate three levels. The proposed multilevel inverter is based on series connection of several basic units. The proposed multilevel inverter is investigated at both symmetric and asymmetric topologies. In order to generate all voltage levels at the output, four...
Loss is a very important parameter in the analysis of the power electronic systems, and accurate calculation of this parameter directly effects on the economic and technical evaluation. Junction temperature, heat-sink sizing and cooling system, failure rate and MTTF1 are some examples of the basic parameters in designing a multilevel inverter, which all depends on the loss. Through previous methods,...
In this paper, a new topology for asymmetrical cascaded multilevel inverter is proposed. The proposed topology consists of series connection of several basic units. Reduction of number of power switches, driver circuits, IGBTs and dc voltage sources are some advantages of the proposed topology in comparison with the conventional cascaded multilevel inverters. In order to generate all output voltage...
The latest development of power drive system product for electric vehicle in PT. Len Industri is reported. Some of the power drive components used in electric vehicle will be described in brief. The vvvf inverter as the core of electric vehicle will be discussed in detail including the hardware design and the control strategy. Finally, some experimental results from a driving test will be presented.
For medium and high voltage applications, Multilevel inverters have been widely used as a important devices. The advantages of multilevel inverters include low electromagnetic interference (EMI) outputs, low power dissipation, low harmonic etc. The most common multilevel inverter topology is cascaded H-bridge topology constituted by IGBT semiconductors. The most common switching technology used is...
The actual definition of sustainability is nowadays widely accepted. It provides a very general indication on what it is, but it reveals unable to assert how it should be reached. However, if one considers the multiplicity of human activities that have led to talk of real process of human settlement on the environment, it is then understood how it is close to the particular mankind activities. Then...
The latest development of 5 kW Transformerless Bidirectional Inverter in PT. Len Industri is reported, accompanied with the experimental result. The dc-dc converter and inverter topology and control is described in brief. Next, hardware design and parallel design are examined. Parallel operation component will be highlighted, such as PLL, Droop Control and Virtual Impedance. Finally, the inverter...
Transformerless single phase photovoltaic inverter has attracted power generation system due to its higher efficiency and low cost. One of the main problems in transformerless single phase photovoltaic inverter is to control leakage current appearing between parasitic capacitor and ground. The leakage current has to be controlled to avoid EMI problem and circuit damage. The main goal of the proposed...
This paper discuses the design and simulation of a 40 kVA Power Conditioning System (PCS) for defence applications. The above simulation is a based on double conversion technique. This solid state power converter employing IGBT assisted double power conversion technique. The output of PCS produces electrical power which in turn can be used to power various mobile on board applications such as electronics...
The output voltage and current from dc-ac inverter generate switching noises and may cause electromagnetic interference (EMI) problems to other electronic systems. To analyze high frequency switching behavior of an inverter accurately, an accurate IGBT model is essential. In this study, an insulated gate bipolar transistor (IGBT) is modeled using datasheet and measurement data to analyze the high...
Multilevel inverters generate a level output voltage from DC voltage sources. Requiring nice range of semiconductor switches is main disadvantage of structure inverters. The structure inverters are divided in 2 groups: symmetric and Asymmetric converters. The Asymmetric structure inverters give an oversized range of output steps while not increasing the quantity of DC voltage sources and elements...
The present paper is intended for the detection and diagnosis of open-circuit faults in a three phase voltage inverter fed induction motor. Two techniques are being presented and used in order to achieve the open-circuit faults detection and localization. The paper concludes with a comparison between both these two techniques supported by some simulation and experimental results in order to illustrate...
Power Electronics is essential in almost most of the modern renewable energy generation in order to enhance the efficiency of the generation. Converters are used as an interface between load and PV panels particularly for Maximum Power Point Tracking (MPPT). This paper introduces the reliability model of solar PV generation system not only on the physical characteristics but on the simulated operating...
Total Harmonic Distortion (THD) of a voltage or current signal causes power system losses, apparatus overheating and increases the power bills. This paper proposes the design and implementation of a transformer less single-phase inverter system that produces an output voltage of desired magnitude and frequency at a very lower THD. In ‘general inverter system’, a lower DC voltage is inverted into lower...
Wide bandgap semiconductor devices like SiC have achieved more and more attentions in electric vehicles-(EVs) because of their high-temperature capability, high-power density, and high efficiency. As all known, EVs frequently operate in acceleration, deceleration and low speed driving in urban traffic. Thus, not only the rated operation condition should be considered, but also some extreme operation...
SiC power semiconductors are believed to offer an attractive solution for motor drive application in electrified vehicles in 5∼10 years. Newer generations of commercial SiC MOSFETs in the 900∼1200V class are significantly improved in energy losses, reliability and price. To analyze the potential impact of SiC technology for HEV inverter systems, performance gain of SiC MOSFETs over existing silicon...
Global warming is already having significant and costly effects on our communities, our health, and our climate. Nowadays, In developing countries (G20) around the world, decisions are being considered and a shifting of our dependence from fossil fuels to renewable energy sources (RES). Among RES solar energy, specially photovoltaic system (PV) play a key role in this challenge, thus, this paper provides...
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