This paper presents a novel control strategy, on the example of three-phase voltage source inverter, to increase life-time power semiconductor devices. Based an online estimation junction temperatures switching frequency is modified through decrease thermal cycles. In addition neutral point potential can be shifted using flat-top method, resulting in additional reduction So presented system in-stead ordinary pulse width modulation lifetime devices increased significantly.

In this paper, the problem of how to implement MTPA/MTPV control for an energy efficient operation a high speed Interior Permanent Magnet Synchronous Motor (IPMSM) used as traction drive is considered. This method depends on inductances L <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">d</sub> , xmlns:xlink="http://www.w3.org/1999/xlink">q</sub> flux linkage ΨPM and stator resistance R xmlns:xlink="http://www.w3.org/1999/xlink">s</sub> which...

This paper presents a current sensor for commutation measurement with bandwidth from DC up to 315 MHz. The is inserted in the loop by coaxial housing low insertion inductance of about 1.2 nH. based on HOKA principle using tunnel magnetoresistance sensors and Rogowski-coil high frequency respectively. tested half-bridge configuration equipped gallium nitride transistors compared two state-of-the-art sensors.

This paper presents a broad bandwidth (DC to ∼50MHz) current sensor. It is inserted in the conducting path and it has low insertion inductance of about 1 nH due coaxial housing. The measurement procedure based on HOKA principle using TMR sensors for frequency capture Rogowski coil high capture. combines both by analog signal processing.

For pulsed power applications special voltage converters are needed. This paper presents an approach for a converter, which generates bipolar output voltages up to 10 kV with extremely fast slopes and high repetition rates. The topology is based on H-bridge dc-link. current of the converter adapted operation Dielectric Barrier Discharge. To avoid use spark gaps due their limited lifetime thus series stacked MOSFETs used realize switch blocking voltage. A balancing network introduced as well...

Due to the high power density interior permanent magnet synchronous motors (IPMSM) are widely used as traction drives. However this machine principle has disadvantage of low energy efficiency in speed range. An alternative is electrically excited motor (EESM). It enables an additional degree freedom control torque efficiently. In paper efficient implemented for EESM which designed application.

Z-source inverter (ZSI) combines the electrical function of a DC/DC converter and three-phase inverter. This study deals with three-level neutral-point-clamped (NPC) ZSI which brings an additional potential. The benefit is lower output current ripple each phase. Due to non-linear behaviour control path, designing accurate especially dynamic can be challenging. presents design adaptive for NPC fulfil previously mentioned goals. correct functionality system underlined measurements at different...

This paper presents a model based junction temperature control system to increase the expected lifetime of IGBT power modules by using hybrid discontinuous modulation technique. technique offers possibility influence switching losses and is therefore used as correcting variable for controlling temperatures modules.

This paper presents a current sensor for commutation measurement of high power semiconductor modules with bandwidth from DC up to 240 MHz. It is integrated in the path coaxial housing generating specified point adding low insertion inductance 1.8 nH. consists tunnel-magnetoresistance sensors frequency and PCB Rogowski coil measurement. The techniques are combined using HOKA principle. linearity, dynamic behavior as well signal-to-noise ratio characterized.

Power converters with semiconductors switching only at predefined, equidistant instants — known as "discrete-time switching", "synchronized switching" or "clocked commutation" show considerably different current control behavior compared to pulse-width modulated (PWM) linear con trollers. This paper presents and explains some of the effects discrete-time-switching on output waveforms, especially when using a predictive state selection algorithm. Typical characteristics generated patterns are...

A novel approach for a power supply, which generates bipolar pulsed output voltages with high repetition rates, is proposed. It based on solid-state Marx topology. The supply suitable high-voltage repetitive applications such as generation of Dielectric Barrier Discharges. main advantage this new developed topology the small number semiconductor devices per stage, compared to other common approaches. use semiconductors instead spark gaps results in an enormous increased lifetime and rate...

In automotive applications system reliability is of major importance. The Voltage Source Inverter (VSI) a traction and lifetime limiting factor due to the limited temperature cycle capability its switching devices, commonly IGBT-modules. Temperature swings caused by varying load conditions on motor cause mechanical stress in modules change power dissipation. This paper presents novel control method, which achieves reduction swing during low increasing conduction losses devices. A controller...

In this paper different methods to measure torque ripples in electrical machines are examined. Special focus is on capturing harmonics of the output high-speed ranges. The proposed method offers a possibility capture over wide frequency range. Compared classical sensors, measurement bandwidth increased by factor seven.

This paper presents a contact-free current probe, developed to measure typical profiles which appear in power electronic circuits. For high switching frequencies and steep slopes the requirement for dynamic of probe is high. means needs wide bandwidth from DC up several megahertz. achieved by combination two measurement principles, Tunneling Magnetoresistance (TMR) sensors Rogowski coil.

Junction temperature swings, caused by load alternation in power electronics, lead to a reduced lifetime of semiconductor devices. When swings occur, the different material layers device expand way because their coefficient thermal expansion. The result is mechanical strain between these layers. control systems are able minimize occurring and smooth junction course. Thus, expected extended. A possibility affect value required realize such system. This paper proposes model based system for...

The lifetime of power transistors significantly depends on the junction temperature swings. These swings occur, for instance when load conditions electronic circuit change. In this work, a closed loop control system is designed to increase expected transistors. Therefore, reduces occurring by influencing losses transistor. For that, gate driver's supply voltage adjusted, which affects switching speed and conduction characteristics. measured determination sensitive internal resistance via...

Load changes of electrical machines driven by inverters cause temperature swings the semiconductor devices in IGBT modules inverters. These lead to mechanical strain different material layers IGBT-power-modules and limit numbers cycles failure therefore reduce lifetime IGBTs. This paper presents a control system which is paralleled standard torque system. It aims magnitude caused load an interior permanent magnet synchronous machine. The principle method is, increase IGBT-modules creating...

This paper presents the design and analysis of a high-density two-stage battery charger for mid-power applications like small electric vehicles high-performance laptops utilizing gallium nitride (GaN) power devices. In addition to adherence maximum junction temperatures, thermal is carried out in-housing operation, which particularly critical fanless wall chargers. Design measures include calorimetric semiconductor selection, half-bridge miniaturization, thermally conductive epoxy resin...

For the field oriented current control of permanent magnet synchronous machines in electric vehicles knowledge rotor position is necessary. The information typically measured with a resolver. Therefore failure this resolver critical. This paper describes several possibilities to use sensorless techniques as redundancy focus on requirements for vehicles.

In this paper the losses of electrical drive system for vehicles (EV) are investigated and modelled. For this, individual two main components, voltage source inverter (VSI) Interior Permanent Magnet Synchronous Machine (IPMSM), analysed This model considers parameter variation dependency on operating point IPMSM. Using multiple linear regression, an approximation equation is found which describes accurately total loss VSI. Hence it enables to determine by simulation.

This paper presents investigations on the setup of power electronic stage within a power-hardware-in-the-loop machine emulator. The emulator draws currents from drive inverter, equivalent to real electrical machine, by multi-phase interleaved-switched inverter coupled inductors. choice these inductors is essential for functionality and thus investigated. influences inductor emulator's output slew rate as well their ripple are worked out with respect desired application. Based results, an...

This paper presents a modulation technique, which combines the known space-vector-pulse-width-modulation (SVPWM) and discontinuous-pulse-width-modulation (DPWM). enables possibility to set switching losses freely within certain border band. A possible area of application is reliability IGBT-inverters modules, where junction temperature swings can be reduced by influencing power losses. The functionality underlined analytical derivation conduction mean loss equations are verified measurements...

The variable switching frequency seen at the switches of Direct Model Predictive Control (DMPC) converters with a discrete-time implementation sampling, prediction and is major concern for practical application this control method. This paper gives analytical explanations resulting local global average common DC-DC DC-AC based on DMPC operating principle. influence simple strategy to reduce also analytically investigated.