2200 Watt server power supply for induction heating

A new 2200 Watt power supply made from server power supplies, and with steady cameras 🙂

Test of it in a long induction heater run is being edited and will come online in a few days

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Chinese 1800 Watt Induction heater, 5 minute stress test

5 minute stress test at full power. 1800 Watt peak input power.

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2000 Watt laptop charger for induction heating

I built my first experimental cheap power supply for the 1800 Watt induction heater and it was a great success!

12 laptop chargers put together for 40V 51A.

See the induction heater here: http://kaizerpowerelectronics.dk/induction-heating/unboxing-a-chinese-1800-watt-induction-heater/

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Unboxing a Chinese 1800 Watt Induction heater

I finally got around to get the IH out of the box and repair it, here is part 1 of a series of videos on this IH.

This is a 1800 Watt Induction heater that I bought from ebay at 40 Euro, I avoided the cheapest seller for the simple reason that they all have bad reviews, so be sure to check that out before just buying the cheapest.

Discussion of Chinese 1800/2500W induction heaters: https://highvoltageforum.net/index.php?topic=530.0

The future parts will be power supply building and testing.

Pete who started the thread has a wide ranged knowledge of induction heaters. Check out Pete Stanaitis website: https://spaco.org/Blacksmithing/ZVSInductionHeater/ZVS1800Watt/1800-2500WattZVSInductionHeaterNotes.htm and his take on the 1800W IH: https://www.youtube.com/watch?v=S66Y-EZYhjo

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3x MIDI videos from DRSSTC1 demonstration

All MIDI files played can be found in this thread: https://highvoltageforum.net/index.php?topic=118.0

DRSSTC1 information: http://kaizerpowerelectronics.dk/tesla-coils/kaizer-drsstc-i/ which I will soon update with the rebuilded bridge


Star Wars – Imperial Death March

Dave Brubeck – Take Five

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My Tesla coil DRSSTC1 exploded 12 days before a show, panic!

Can you guess the song that was played?

Silent death during a MIDI playback, once power is turned back on, the bridge short circuits and burns outs.

I quickly changed it to a SKM200GB123 inverter bridge that I had around, built for another experimental project, hence why its a little crude.

It took 3-4 evenings/nights to locate all the faults, replace parts and get it running again.

I am happy.

Schematic and pictures: http://kaizerpowerelectronics.dk/tesl…

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DRSSTC design guide updated with MMC design guide

It only took me a mere 4 years from I first started this article about the MMC until it is now done for public released 🙂

Not that it took me 4 full years to write on it, but it has been a on/off gathering of information and then finally making a write-up on it.

I hope this will help many builders understand MMC design better: http://kaizerpowerelectronics.dk/…/drss…/mmc-tank-capacitor/

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Video gear & workflow: Canon 5D mk3, Rødelink, FPS1000HD and more

A walk-through and demonstration of all my video and audio equipment that I use for youtube videos.

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AC vs DC fuses, high current, explosive destructive testing and theory

Littlefuse 300A 32VDC fuse destructive test

Protistor 200A 690VAC fuse (naked) destructive test:

Protistor 200A 690VAC fuse (housed) destructive test:

High Voltage Fuse Teardown video: https://www.youtube.com/watch?v=XoW5iqfq4tA
Semiconductor Fuse Applications Guide: https://ep-us.mersen.com/fileadmin/catalog/Literature/Brochures/BR-Semiconductor-Fuse-Applications-Guide-Brochure.pdf

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Huawei RRU3928 1800MHz radio base station circuit analysis (part 2 of 2)

The RRU3928 is an outdoor remote radio unit. It processes baseband and RF signal data. With the Software Defined Radio (SDR)technology, the RRU3928 supports the dual-mode operation of any two modes of GSM, UMTS, and LTE through software configuration modification. RRU3928 has a dual-transmitter and dual-receiver structure, which supports higher output power and carrier capacity.

It can f.ex. do 6x GSM carriers at each 10 Watt and 1x LTE carrier at 2×10 Watt or 4x GSM carrier at each 10 Watt and 2x UMTS carriers at 2×20 Watt.

If you missed part 1, see it here: http://kaizerpowerelectronics.dk/teardown/huawei-rru3928-1800mhz-radio-base-station-teardown-part-1-of-2/

Above pictures shows the coaxial cavity band pass filter which in popular speech is called a duplexer or diplexer. Duplexer band pass filter explained: https://www.youtube.com/watch?v=HNaAQ3a7Duc

The power amplifier consists of a series of low noise amplifiers, general purpose amplifiers and power amplifiers. The first amplifier IC is not able to be identified.

First identifiable IC is a NXP BLF6G22LS-40P 1.8-2.1 GHz 5-15 Watt dual amplifier that feeds the Infineon PTFB182012FC which is a dual power amplifier rated for 2x 10 Watt dissipation at 1.8 GHz.

Anaren Xinger 1P503S, Anaren Xinger II XC1900A-03S and Anaren Xinger III X3C19P1-05S hybrid and direct couplers are used. One output circulator is used for double protection against reflected energy from the duplexer and antenna array.

The system boards 4 ADC/DAC main processors are unknown HI FPGAs that has a generic part number which is not identifiable.

A Altera Arria II GX EP2AGX260 FPGA seems to be the heart of the unit and does all system control and communication with other units of the system. It has 16 transceivers that can run up to 550 MHz. 102600 Adaptive Logic Modules and 244188 Logic Elements available.

The digital to analog signal path starts with one of the HI FPGA ICs that sends a single highspeed bitstream to the Analog Devices TxDAC AD9122. It is a dual 16-bit DAC with a capability of 1230 MSPS.

Analog Devices ADF4902 PLL and Analog Devices ADL5372 1.5-2.5 GHz Quad Modulators seems to be the next part of the path before the output power adjusting TriQuint TQM879005A which is a 1.4-2.7 GHz Variable Gain Amplifier. It can adjust 0.5 dB amplification at a 6-bit scale input.

The analog to digital signal path starts with 6 NEDITEK NDF9117 1747.5 MHz SAW filters (explained here: https://youtu.be/qO127zY3voE?t=963 ) which feed into a Skyworks SKY64341-11 1.7-2.0 GHz RF frontend. This has by other parts a downconversion mixer (explained here: https://youtu.be/qO127zY3voE?t=865 ) which by the use of a local oscillator can bring down the carrier frequency of the signal to something lower that is easier to work with.

The two separate lines now go through the Analog Devices AD8376 dual Variable Gain Amplifiers that has a bandwidth of 700 MHz at -4dB to 20 dB.

The last stage is the Texas Instruments ADS58C20 which is a dual IF multimode receiver capable of working with both GSM / 3G / LTE. If this is the final analog to digital conversion IC or it is one of the HI FPGAs is hard to tell.

Good power supply layout with a lot of transient protection at the input. A single full-bridge of PSMN4R8-100BSE 100V MOSFETs is used for first stage voltage stabilization before the smaller high current planar transformers are driven by D70N1045 MOSFETs.

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