IEEE Power Electronics Society的动态

Check out my recently published paper in the IEEE Sensors Journal: "Sub-mK, On-package Temperature Control for High-Performance Microsystem Applications." High-precision sensing applications demand stable operating environments, with temperature control being one of the most critical factors. Die-level control is precise and power-efficient but must be embedded in the device layout. On the other hand, enclosure-level control is often bulky and energy-intensive. Our research introduces an on-package approach that combines the best of both: flexibility and precision. By integrating heaters and sensors on the package itself, we achieve sub-mK temperature stability with only 500 mW power consumption. This method uses a simple Proportional-Integral (PI) controller and is suitable for a wide range of applications that fit within the package. Many thanks to my supervisor, Professor Behraad Bahreyni, and my co-authors Dr. Mikhail Kanygin and Dr. Fatemeh Es.haghi for their invaluable contributions to this work. Read more here: https://lnkd.in/gnh3tcyr #research #sensors #temperaturecontrol #microsystems #MEMS #ieee

Proud to share our published research, presented at the University of Colombo on December 3, 2024. We developed an innovative and affordable wireless control system for Variable Frequency Drives (VFDs), utilizing energy-efficient ESP-32 microcontrollers and the Modbus protocol. Our system includes a cost-effective Human Machine Interface (HMI) for Delta E-series VFDs, enabling seamless motor control with minimal delay (<1s). At nearly half the cost of similar market solutions, this project is a step forward in accessible industrial automation. #Automation #VFDControl #Innovation #Research #IndustrialAutomation #UniversityOfColombo

Hello everyone, In my previous post, I talked about D4i/Lumdata drivers. Over the years, I have had the opportunity to work with these drivers, and they are now a key part of my master's thesis. Currently, D4i drivers are predominantly used in outdoor luminaires, particularly for energy monitoring applications involving Zhaga or NEMA nodes. However, as we look to the future, it is likely that almost every driver—indoor or outdoor—will adopt D4i or similar certifications. While there are plenty of DALI-2 drivers available in the market, it is important to note that not all include mandatory support for luminaire data, energy data, or diagnostics data. For this reason, always look for the D4i approval mark or Lumdata certification (e.g., Tridonic drivers) to ensure these features are supported. Source for the image: https://lnkd.in/ddG-GiEn

I am excited to share that we have completed the development of a Digital Frequency meter capable of counting up to 1MHz without the use of a microcontroller. This project was a part of the Digital Systems 1 course provided by Dr. Farhad Pouladi. The device is designed to be powered by AC and can measure the frequency of input sine waves, square waves (pulses), and triangle waves ranging from 0 to 1MHz. It can also detect frequency overflow, with an initial setup time of 15 seconds and a counting time of 10 seconds. While this project could have been much smaller and more cost-effective with a microcontroller, it has provided us with valuable insights into digital ICs and components as part of the Digital Systems 1 course. #DigitalSystems #Frequency_Meter #Shahid_Beheshti_University

We encourage you to explore one of the July TCAS-I Paper Highlight videos "A High Sensitivity CMOS Rectifier for 5G mm-Wave Energy Harvesting". ?? Authored by: Edoh Shaulov, Tal Elazar, Eran Socher Harvesting RF cellular power has vast potential to reduce battery reliance in low-power, wireless electronics. However, the challenge of efficiently converting the low-power RF signal to dc power remains a challenge, especially in the mm-Wave domain and, even more so, for CMOS. This work proposes a power-splitting and voltage-summation rectifier design technique that allows one to target a specific output voltage while optimizing power conversion efficiency (PCE). By splitting the input power to n rectifiers and series connecting them in dc, PCE saturation is mitigated and high output voltage can be achieved. This technique is thoroughly investigated in simulation and modelling, and validated by fabrication (TSMC 65 nm) and measurements where the proposed design achieves a record 400 mV output voltage and 15% PCE for -10 dBm input power at 28 GHz. Watch the video to learn more ?? ?? Read the paper on IEEE Xplore here: https://loom.ly/FhrLOjY #IEEECASS #TCASI #JulyHighlight

... and we’ve named it the Dornbin Rectifier, an AC-to-DC converter that achieves inherent unity power factor and zero-voltage switching (ZVS) throughout the entire mains cycle. Below is an image illustrating the input current and voltage, alongside the rectified (output) voltage. The image demonstrates an open-loop operation (without a current control loop), with no adjustments to duty cycle, frequency, or any other parameter. Simply connect it to the mains, and it behaves like a constant resistor. When certain conditions are met, the mains never see the other side of the wall—your DC load and its variations! For those attending #ECCE 2024 in Phoenix, USA, our colleague, Dr. Fevzi Kafexhiu from V-Research GmbH, will present a paper titled “A Rectifier with Inherent Unity Power Factor”, explaining this new topology: Session Name: Soft Switching in Power Converters Session Date: Tuesday, October 22, 2:30 PM–4:10 PM Session Room: Expo Hall Dr. Alireza Ghanbari and I are happy to answer any questions you may have. #IEEE, #ECCE2024, #V-research #DornbirnRectifier

Fastest Known Method to Reliably Detect Overcurrent in Protective Devices for LVDC Systems - Fraunhofer IISB R&D Award 2024 Johannes Gehring, research scientist in the DC Grids Group of the Intelligent Energy Systems Department at Fraunhofer IISB has been honored with the Fraunhofer IISB R&D Award 2024 for his invention of an overcurrent limiting and detection unit (OLDU). OLDU offers unbeatable advantages as a detection unit in protective devices, especially for DC applications, such as in electric vehicles, charging stations, local DC or on-board grids for ships and aircraft, where very fast switch-off times and short-circuit current limitation are required. OLDU can be used in switchgear for currents of up to several thousand amperes with ultra-fast detection in the nanosecond range, is implementable as a pure hardware solution and also cost-effective. Furthermore, it is compatible with IEC 60947-10 and has already been filed for a patent (EP23202843). We congratulate Johannes Gehring on his invention. That's the true spirit of innovation! #PowerElectronics #DC #DCGrids #eMobility #Aviation #EnergySystem #DirectCurrent #ProtectionDevice #FaultDetection #ShortCircuit #CurrentLimiter #SiCValley #IISBScienceStars #IntelligentPowerElectronics

I’m thrilled to share the successful completion of another project in the field of power electronics. This project focused on accurately estimating the position and speed of synchronous reluctance motors, with an emphasis on maintaining high performance across a wide range of speeds, including low speeds. Throughout the implementation, I encountered several challenges in achieving the following goals: - Ensure that the sensorless control method operates effectively even at low speeds. - Accurately extracting the motor's saturation curve to enhance the sensorless control method. - Develop an algorithm to precisely estimate the initial rotor position, which is crucial for the startup of salient pole motors. I’ve published several articles on this topic, which you can find on IEEE Xplore. #PowerElectronics #MotorDrives #sensorless #SynRM #IEEE

JUST PUBLISHED: Advanced Functional Optical Fiber Sensors for Smart Battery Monitoring Click here to read the latest free, Open Access article from Energy Material Advances: https://lnkd.in/eqiM-iVf

?????????????? ?????? ???????????????????? ???? ?????? ???????? ?????????????????? In my previous post, I discussed the key features and performance advantages of GaN technology. Now, I’d like to focus on how advanced gate drivers play a critical role in maximizing the efficiency and reliability of GaN transistors. To fully leverage GaN’s potential, high-performance gate drivers are essential. These drivers enable precise control over switching characteristics, minimizing switching losses and enhancing power density. Whether in isolated or non-isolated configurations, high-quality gate drivers are crucial for ensuring consistent and reliable performance in demanding applications. In sectors like telecommunications and server power supplies, efficient power conversion is paramount, particularly in data centers and telecom infrastructure. Additionally, for motor drives and robotics, the combination of GaN technology and sophisticated gate drivers offers superior performance, driving advancements in motor control and automation systems. As GaN technology continues to push the boundaries of power conversion, we’re seeing more compact, efficient, and powerful systems. It will be fascinating to witness how GaN evolves to meet the demands of future applications. What sectors are likely to adopt GaN technology?next? Credit to: https://lnkd.in/g-R-KThN https://lnkd.in/e2Nvs9_T #GaNTechnology #PowerConversion #InnovationInTech #AdvancedElectronics