This paper presents the development of a DC-DC boost converter. In the proposed boost converter design, a passive regenerative snubber circuit is included to absorb the energy of stray inductance so as to reduce the IGBT switching losses. MATLAB simulation as well as an experiment results are conducted to validate the proposed device. The results show that the proposed boost converter design gi...

A procedure for automatic parameter extraction is outlined, based on accurate physics-based models of the diode, IGBT and associated circuitry. A formal optimisation method is used to refine initial parameter estimates, and is coupled with a hardware testing system to obtain device waveform measurements.

In this paper we present a 2D finite difference device simulator which has been developed to underpin the design and optimisation of power IGBTs. The simulator has been used to investigate the effect of elevated temperatures on the performance of the IGBT for use in environments where ambient temperatures up to 200°C are likely. The preliminary results of this investigation are reported here.

The problems faced in generating analytical models for the IGBT and power diode are devising correct equations and determining realistic boundary conditions, especially for 2D features, while ensuring convergence of the models. These issues are addressed in this paper in relation to the temperature dependent modelling of IGBTs and diodes.

The paper will give a detailed presentation of an active power cycling test bench in high temperature conditions developed to ageing the solder between the Direct Copper Bonding (DCB) and the base of IGBT devices. The average junction temperature measurement protocol, the temperature regulation of the base plate, the acquisition of all the electrical signals, and the performance of the test cir...

Today, power electronic reliability is a main subject of interest for many companies and laboratories. The main process leading to the IGBT failure is the cycling thermal stress. Indeed the current flow induce local heating and then mechanical stress. This paper deals with electro thermal stress under steady and transient current states. The main objective is to test bonded wires with active cu...

Wind turbines are being built at power levels above 1.5 MW. Higher power levels are being anticipated for off-shore applications. To limit mechanical stresses and power surges in these high power systems speed control is necessary. The doubly-fed induction generator (DFIG) system is investigated as a viable alternative to adjust speed over a wide range while keeping cost of the power converters...

We introduce a multidimensional peridynamic formulation for transient heat-transfer. The model does not contain spatial derivatives and uses instead an integral over a region around a material point. By construction, the formulation converges to the classical heat transfer equations in the limit of the horizon (the nonlocal region around a point) going to zero. The new model, however, is suitab...

The increasing request for motor drives with higher power levels is also driving the demand for power modules providing higher currents. The conventional approach to fulfill this requirement is to look for dedicated high current power modules. This article describes the alternative approach of paralleling IGBTs and diodes within one power module to extend its power capability, for example using...

During 3D IGBT, MRI images are used to contour the tumor and surrounding organs-at-risk (OAR), enabling highly accurate planning of sufficient radiation doses to better treat the tumor. At the same time, doses to OARs, such as the bladder and rectum, are reduced (figures 2-4). Despite these benefits to the patient, the adoption of 3D IGBT for cervical carcinoma is slow in Southeast Asia, but is...