This paper presents a quantitative thermal comparison of five compact cooling architectures for a 30 W, 40 kHz, 700 V silicon-carbide (SiC) half-bridge used in residential heat-pump inverters. The designs—ranging from a bare aluminium heat-sink to a fully enclosed heat-pipe holder—share a strict 69 mm × 100 mm footprint. Finite-Element simulations in AN-SYS 2024 R1 predict that integrating a single 6 mm copper–water heat pipe and maximising its contact area lowers the peak MOSFET junction temperature from 511 °C to 78 °C under natural convection—an 85 % reduction that meets the ≤80 °C design target. The same change shortens the dominant thermal time constant by roughly 3.5× and raises full-load inverter efficiency by about 1.4 % points. A 1 000-cycle coupled thermo-mechanical analysis shows that all critical joints stay below 200 µε, preserving long-term reliability. These results demonstrate that heat-pipe integration—not additional fin area—is the most effective way to cool wide-band-gap devices dissipating more than 20 W/cm2in naturally ventilated, footprint-constrained power electronics.

This paper describes the mathematical modeling of a hybrid bus with a fuel cell and batteries. The main purpose is to model the driving cycle and to calculate energy consumption and losses in all parts of the drivetrain, voltages, currents, etc. during the driving cycle. The bus is equipped with a 100 kW Permanent Magnet Synchronous Machine (PMSM) and a 70 kW fuel cell; the battery supplies the energy when the fuel cell power is not sufficient, during fast transitions, or when regenerative braking is required. The motor and battery parts of the model have been experimentally verified.

The SensorQuad is designed as a low cost teaching platform for embedded programming. It focuses on students of mechanical engineering, especially in the field of automation, that need to understand the concepts of control systems. It allows to show the basics, then develop the skills further for example with DC motor control, sensor communication, to more advanced topics such as for example PID control. It uses an STM32 processor, four DC motors, LEDs and several sensors (acceleration, magnetic field, temperature, humidity,…). Commented examples are provided to students to shown how to work with the peripherals. It is designed as a low cost device, so that the student can eventually buy it and use it at home as well. It is also provided with an example application for Android so that the programming of a control interface and bidirectional Bluetooth communication can be shown as well.

This paper describes the development of a prosthetic robotic hand based on the human hand anatomy. The phalanges used are real human scanned phalanges. The carpal bones and the arm structure are modelled by using Autodesk Inventor Professional 2019 software. The control system is developed under Arduino Mega 2560. The input signals are based on MyWare sensors and press sensors. The prosthetic hand is dotted with 5 step motors one for each finger that control the flexion/extension and one servo that control the addiction/abduction of the thumb. Actual prosthetic hand is dotted with 16 DOF. The test results demonstrate an accurate finger movements.

This paper presents a methodology for energy consumption calculation and drive train optimization for an electric bus. The mechanical, motor and inverter models are described. The methodology allows to calculate the efficiency maps and the energy consumption in kW/km. A 14t bus with motor power ranging from 92 to 122 kW is used. A fixed or a variable gearbox is considered. The calculations are based on measured data from real bus lines on various terrain in the city of Prague. The calculation is then compared to the measured energy consumption on a similar terrain, yielding a 7% difference between the calculated and measured energy. The calculation shows, that a variable gearbox could save few percent of energy. The differences in energy consumption between the fixed and variable gearbox are in the order of few percent. The disadvantages are increased cost, maintenance, decreased reliability.

This paper present experimental results obtained during the construction of an SiC based inverter for high speed permanent magnet synchronous machines (PMSM). First a comparison between an IGBT and SiC modules used for the same application is presented. The modules static and switching losses are experimentally obtained and compared. The SiC module show significantly lower switching losses. Then the SiC inverter design is described and experimental results are shown. It is found that parasitic inductances in both the gate driver and DC intermediate circuit play a major role and need to be minimized. One procedure using vertically aligned PCB traces is described and measured results are presented. The presented SiC based inverter was successfully tested with the high speed PMSM up to the application full voltage 600V. It was also tested with a high switching frequency up to 500kHz although the target frequency is only 100kHz.

This paper presents theoretical background and experimental results obtained during development of a car compressor driven by a turbine and a high speed permanent magnet motor. Alternatively, the turbocharger used in combination with an auxiliary boost motor can be used not only in the car, but with some modifications as CHP unit (Combined Heat and Power). The control algorithms for work in infinite grid and off-grid systems and appropriate modification of Permanent Magnet High Speed Generator (PMHSG) controller are discussed. The experimental results and findings are presented.

This paper presents three methods of evaluation of losses in magnetic circuits of sinusoidal filter chokes and their experimental verification. The attention is focused on losses caused by higher harmonics in context of frequency pulse width modulation. Methods based on the calculation of the reference loss method are described, based on direct measurement using an integral of instantaneous power losses and determining of such from warming characteristic.

This paper presents results of the control algorithm development for vector control of permanent magnet synchronous machine realised on DSP TMS320F2812. Results of experiments and project of new control unit based on FPGA are presented. The setup was tested with permanent magnet motor up to 42000 RPM, nominal torque 1.2 Nm and nominal current 11 A.