This paper presents an experimental study on the ageing of insulated-gate bipolar transistor (IGBT) power modules. The aim is to identify effects cycling these devices with high baseplate temperatures (60 °C 90 °C) and wide temperature swings 100 °C). These values for thermal stresses have been defined according automotive applications. test conditions are provided by two types benches that will be described in this paper. changes electrical indicators observed regularly a monitoring system....

This paper is related to faults that can appear in multilevel (ML) inverters, which have a high number of components. subject increasing importance high-power inverters. First, methods identify fault are classified and briefly described for each topology. In addition, strategies hardware modifications allow operation faulty conditions also presented. As result the analyzed works, it be concluded ML inverters significantly increase their availability able operate even with some

Multicell converters were introduced ten years ago and, over this period, their properties have been thoroughly analyzed. Since then, concept has lead to some other innovative topologies which are briefly presented in paper. Different ways introduce soft switching multicell investigated. The of distributing power several switches, giving more degrees freedom and using less passive components, is extended further with the stacked topology. Finally, direct AC-AC approach described.

The power characteristics of wind turbines are nonlinear. It is particularly true for vertical-axis whose provided very sensitive to the load. Thus, controlling operating point essential optimize energetic behavior. Several control strategies (maximum tracking) can be used energy conversion. If wind-turbine characteristic C <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">p</sub> (lambda) supposed a priori known, it optimal torque, speed, or...

The supervision of semiconductor power devices in operation demonstrates an obvious interest to improve the operating safety electronic converters used critical applications. Unfortunately, this is a significant challenge due variability stress conditions on one hand and difficulty implement accurate measurement systems stages other. Using <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">V</i> <sub...

Multilevel converters have many power devices and drivers. Thus, a direct reliability calculation based only on the first failure occurrence one of components clearly leads them to be devalued compared two-level converters. However, taking into account that symmetrical multilevel such as <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">X</i> -level active neutral point clamped (ANPC) family are imbricated and/or stacked switching cells hand, with...

Component counts and oversimplified reliability rules may lead to the conclusion that multilevel converters are less safe than two-level converters, just because they use more components. A better approach might be consider a different arrangement of components also consequence faults very different. This paper is focused on study consequences in hard-switching soft-switching multicell converters. Solutions minimize major described.

The aim of this paper is to explain the intrinsic short-circuit tolerance an IGBT multicell inverter when a commutation failure occurs. Such may either be wrong gate voltage (malfunctioning driver board, auxiliary power supply failure, dv/dt disturbance) or (over-voltage/avalanche stress, temperature overshoot). stresses are studied and show that no opening bonding can appear consequently risk explosion. That why, owing imbricated cells structure, withstood for few switching periods, with...

The test and the characterization of medium or high-power electronic converters, under nominal operating conditions, are made difficult by requirement electrical source load. In addition, energy lost during may be very significant. opposition method, which consists an association two identical converters supplied same source, one as a generator, other receptor, can better way to do these test. Another advantage is possibility realize accurate measurements different losses in first part this...

This paper deals with a hybrid fault-tolerant converter topology. It is performed through the connection of classical three-phase three-level neutral-point-clamped (3L-NPC) fourth flying capacitor (3L-FC) leg. The 3L-FC leg actively balances 3L-NPC neutral-point voltage. For normal operation mode, this proposes mathematical design filter needed to connect these two different topologies. Experimentally, and thanks already existing decoupling capacitors converter, requires addition only one...

Power characteristics of wind turbines are nonlinear. It is particularly true for Savonius vertical axis systems whose the provided power very sensitive to load. Thus, controlling its operating essential optimise energetic behaviour. Several control strategies (maximum point tracking) can be used energy conversion. If turbine characteristic (Cp(/spl lambda/)) supposed a priori known, it an optimal torque, speed or output current. On contrary, if this unknown, operational seeking algorithm...

During the short circuit of a vertical 4H-SiC power MOSFET, high gate current starts to flow through dielectric. We demonstrate that Schottky emission is main physical mechanisms.

This article shows both theoretical and experimental analyses of a fully integrated CMOS active gate driver (AGD) developed to control the high dv/dt GaN transistors for 48 400 V applications. To mitigate negative effects in high-frequency spectrum emission, an original technique is proposed reduce with lower switching losses compared classical solutions. The AGD based on subnanosecond delay feedback loop, which reduces current only during sequence transients. Hence, di/dt can be actively...

The proposed dual-port gate driver architecture relies on a quasi-flying concept to protect SiC power <sc xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">mosfet</small> s against short-circuit events. Hard switching faults (HSFs) extract charges from the by causing leakage current toward source, while under load (FUL) lead charge injection into through reverse transfer capacitance ( <italic xmlns:xlink="http://www.w3.org/1999/xlink">C</i> <sub...

In this paper, a CMOS gate driver in 180nm technology is presented. The implements an integrated and independent ultra-fast dV/dt control circuit dedicated to manage switch-on transients for GaN HEMT technology. order mitigate detrimental effect EMI spectrum wide bandgap transistors, novel method reduce without increasing so much switching losses proposed. A comprehensive benchmark with the classical also presented, where resistance typically adjusted. Simulations are conducted show...

This paper discusses first the discriminating phenomena yielding either a fail-to-short or fail-to-open circuit signature in 1200 V SiC power MOSFETs undergoing short-circuit electro-thermal stress. Since behavior is of particular relevance to application, goes on propose benchmarking number commercial devices, identifying single product which offers consistent characteristics with bias voltages up at least 50% nominal rating. For that device, thorough functional and structural...

In this paper, a new three-level (3L) converter is presented. It called 3L Vienna neutral-point-clamped (3L-VNPC) and consists of two stacked high-frequency (HF) commutation cells working with shared power device. The HF are connected to single-phase switched bridge controlled at low frequency. 3L-VNPC topology extended active VNPC (3L-AVNPC) concept, which generalized for five levels (5L) <i xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">N</i> odd...

Power-factor-corrector (PFC) converters are now commonly used in low-power supply systems connected to AC networks. In addition their basic PFC properties, they constitute the best technical solution directly obtain compatibility with a large range of voltages provided by different distribution networks around world (typically, from 85 265 V rms). It is main application these converters. This function achieved an additional cost and volume, this extra price pay needs be minimized. context,...

The purpose of this paper is to present an analytical approach in order minimize the energy storage a DC bus composed source, filter and load estimate influence all parameters (operating point, control ...) on stability. model real load, constituted by PWM voltage inverter connected permanent magnet synchronous drive developed.