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PCIM 2018 Seminar and Tutorial

Schedule: Sunday, 03.06.2018, 14:00 – 17:30 hrs
Room: Arvena Park Hotel Nuremberg, Görlitzer Str. 51, 90473 Nuremberg

 Click here for more details…

Seminar: Modern magnetic Technologies for High Efficiency and Power Density

Description:
The seminar will present a comprehensive overview of the modern magnetic technologies presently used in power conversion and new trends in magnetics aimed in addressing the new demands in power conversion. In the quest for higher power densities and higher efficiency magnetic technologies were forced to adapt and new magnetic structures were developed.

The seminar will start by presenting several key characteristics of magnetic transformers such as leakage inductance, stray inductance, inter-winding and intra-winding capacitances and their impact on power conversion performance. Methods of measuring and controlling these parasitic elements are also presented.  Read more …


Press release April 2018

Rompower latest technologies  in power conversion reduce the size of the 65 W laptop adapter to the size of an AC power plug

 The ac/dc adapter technology has evolved over the last years and presently the technologies developed by Rompower Energy Systems Inc., increase the efficiency from 88% to 94%, the highest in its class. This increase in efficiency decreases the power dissipation by more than 50% making the adapter to run much cooler. Lower heat dissipation allowed Rompower engineers to reduce the size of a 65W laptop adapter to a tiny volume of 2.3 inc3 (38.5cm3) comparable with the AC power plug while eliminating the bulky AC cable.

We always push ourselves to be at the forefront of power conversion technology, “says Ionel “Dan” Jitaru the founder and CEO of Rompower Energy Systems Inc. Read more…



PCIM 2017 – Sunday, May14th – Monday, May 15th

In May 2017, at PCIM 2017 in Nuremberg, Ionel Dan Jitaru from Rompower Energy Systems will present a seminar and a tutorial
Seminar – Sunday, May 14th  “Modern Magnetic Technologies for High Efficiency and High Power Density “
Tutorial – Monday, May 15th  “New Trends in Power Conversion for Very High Efficiency and High Power Density”


PCIM 2017 – Key Note Paper – Thursday May 18th

On May 18th 2017 Ionel Dan Jitaru will present a Key Note paper entitled “Evolution in Topologies as a Result of new Devices and Enabling Technologies”
Click Here  for more information on PCIM 2017 programs


APEC 2017 March 26-30 Tampa

At APEC 2017 in Tampa (March 26-30), Rompower Energy Systems had introduced the latest 65W adapter with the word’s highest efficiency over the entire input voltage range and a power density above 20W/in3.  Click here for more information.


A Family of High Efficiency Variable Frequency Soft-Switching Off-line DC-DC Converters

The paper presents a family of off-line DC-DC converters for medium to high power delivering more than 95% efficiency for output levels of 12 to 48 V. The multi-layer PCB solution allows for low profile converters with multiple applications, from AC-DC adapters to TELECOM and computing. The main gain of this new design approach consist in using variable frequency topology with high frequency zero voltage switching (ZVS) and zero current switching (ZCS) for primary switchers. Theoretical considerations and practical results are presented for high frequency and high voltage soft-switching. The goal of the designs is to maintain a reasonable temperature rise of the multi-layer PCB board while delivering up to 90 W and respective 750 W power in a reduced volume and low cost.


750W High Efficiency and Soft-Switching Off-Line 12 V Converter

The paper presents an innovative off-line low profile converter design that delivers 750 W of power at 95%-96% efficiency for nominal input range, using variable frequency topology with high frequency zero voltage switching (ZVS) and zero current switching (ZCS) for primary switchers. Theoretical considerations and practical results are presented for high frequency and high voltage soft-switching. The goal of the design is to maintain a reasonable temperature rise of the multi-layer PCB board while delivering 750 W power in a reduced volume and low cost. The resulting product increases more than twice the power density compared to the standard two stages 400V to 12V power converters and outperforms other one stage solutions in a 125 x 70 mm2 footprint with only a 18 mm profile.


High Efficiency Adapter Using Dual Switch PFC-Flyback Single Stage

The paper presents an innovative design that delivers 85W of power at more than 91% efficiency in a low profile using a high frequency quasi-resonant fly-back topology with synchronous rectification, and improved power factor based on dual switch method. A closed to 0.9 power factor is achieved employing only one magnetic element and two primary side switchers. A significant power density increase is obtained due to a combination of smaller bulk capacitor and a smaller magnetic element.


High Efficiency 100W Quasi-Resonant Multi-Phases Interleaved PFC Using Planar Magnetic Components

The paper presents an innovative PFC design that delivers 100 W of power at 96%-97% efficiency for nominal input range, in low profile using a high frequency quasi-resonant interleaved boost topology, while maintaining a reasonable low cost of the ac-dc adapter. Theoretical considerations and practical results for high frequency interleaved boost converters are described. The goal of the design is maintaining a reasonable temperature rise of the case while delivering 100W power in a reduced volume. The resulting product increases more than twice the power density compared to the standard notebook universal adapters.