With the snubber capacitor calculator, you can calculate the needed snubber capacitance. The correct value is needed in order to protect your inverters IGBT/MOSFETs. Protect them from too high switching transients, depending on your busbar layout and stray inductance. Try the new online calculator at: http://kaizerpowerelectronics.dk/calculators/snubber-capacitor-calculator/
New online calculator: Snubber capacitor calculator Read More »
The RBS 6201 two radio shelves can be equipped with virtually any combination of GSM, WCDMA and LTE, which are available for all common frequencies. A single radio shelf can provide up to 3×8 GSM or 3×4 MIMO WCDMA or 3×20 MHz MIMO LTE or a combination of above standards. The RUS supports 60 Watt output power for
Ericsson Radio Base Station RBS6000 teardown Read More »
The RBS 3202 macro is an indoor Radio Base Station with one to four carriers and one to six sectors at 20/40 Watt RF output power per carrier. All the boards that I have comes from the middle row in the above picture and unfortunately I did not have any of the power amplifiers that
Ericsson Radio Base Station RBS3202 teardown Read More »
For now all details during development and testing can be found on the forum thread: https://highvoltageforum.net/index.php?topic=25.0 35 capacitors in series, each 450VDC/1000uF, for a 48 uF bank with a voltage rating of 14000VDC, making it able to store roughly 5kJ.
5kJ capacitor bank, 1.5kJ BANG test at end! Read More »
I kindly ask you all, that you carefully consider and think about all the websites you have used to learn about electronics, all the forums you have trawled through for information and the vast amount of videos on youtube that has helped you understand and solve a problem. This information only exists because there are
To all electronic enthusiasts! Read More »
Nokia Siemens Networks Flexi Multiradio BTS is a GSM/EDGE, WCDMA/(I-)HSPA, and LTE base station. It is used in mobile telecommunication antenna networks. A network that you use daily on your cellphone. Teardown of a NXP BLD6G22L-150 integrated Doherty amplifier from a Nokia Siemens Networks Flexi WCDMA base station. The previous teardowns that are also highly
Nokia Siemens Networks Flexi WCDMA teardown: integrated Doherty amplifier (part 5) Read More »
Nokia Siemens Networks Flexi Multiradio BTS is a GSM/EDGE, WCDMA/(I-)HSPA, and LTE base station. For use in mobile telecommunication antenna networks. A network that you use daily on your cellphone. Part 1: System station, Part 2: Power Amplifier and Part 3: Antenna The following 25 minute video shows the teardown step by step with explanations, high
Nokia Siemens Networks Flexi WCDMA Teardown: Power Amplifier (Part 4) Read More »
This is a Kone KM997160 variable frequency motor drive that is developed and used for elevators. Kone has a long history of their own motor drives that came in more or less atypical enclosures compared to other variable frequency drives. With this KDM model, they do however take the same form as many other drives
Kone elevator 45 kW motor drive teardown Read More »