KPE - www.kaizerpowerelectronics.dk (see latest post for new videoes)

[madsbarnkob]

Construction of a 3 phase 400 VAC at 32A soft start circuit with safety features and a data monitor. All parts like enclosure, current transducers, voltage step down, contactors and wiring is reused from my 3 phase 13 A Lübcke variac build, that unfortunately had one of the auto transformers burn up.

Pictures and schematics: https://kaizerpowerelectronics.dk/general-electronics/3-phase-32a-400vac-soft-start-power-supply/

[madsbarnkob]

Part 1: Teardown of a Philips / Fujifilm PCR Eleva S x-ray image scanner / digitizer. Also known as Computerized Radiography (CR), it fulfills the job of scanning a x-ray exposed image plate with a laser beam and extract each pixel illumination with a photomultiplier tube setup. It can scan 78 plate per hour with a general resolution of 3520 x 4280 pixels in 12 bits per pixel gray scale.



Pictures and long description: https://kaizerpowerelectronics.dk/teardown/philips-pcr-eleva-s-x-ray-image-scanner-teardown/

[madsbarnkob]

Part 2: Reverse engineering of laser scanner module from a Philips / Fujifilm PCR Eleva S x-ray image scanner / digitizer. Also known as Computerized Radiography (CR), it fulfills the job of scanning a x-ray exposed image plate with a laser beam and extract each pixel illumination with a photomultiplier tube setup.

Part 2 pictures and long description: https://kaizerpowerelectronics.dk/teardown/x-ray-image-laser-scanner-reverse-engineering/

[madsbarnkob]

The Brandenburg Alpha Series II 5 kV Power Supply is from Great Britain and made in 1977. The model 2507r is specified for 500 to 5000 VDC at 5 mA, around 100 VA power rating.

[madsbarnkob]

Reverse engineering of the Fujifilm PMT26A PMT module that contains the photomultiplier tube, high voltage power supply and analog amplifier from a Fujifilm PCR Eleva S / CR-IR 357 x-ray image scanner / digitizer.



Pictures and long description: https://kaizerpowerelectronics.dk/high-voltage/fujifilm-pmt26a-photomultiplier-tube/

[madsbarnkob]

I found a complete Philips Medio 50 CP-H system consisting of 2 meter tall 19″ rack with computer, driver, inverter and high voltage tank. Dual X-ray tube head rated for 150 kV and a control desk. It was only possibly for me to take the control desk with me. No effort was done for the driver, inverter and high voltage tank, as it was from the 1990’s and SCR based inverter design.

[madsbarnkob]

Teardown of a ABB DCS401.0900 DC motor drive. It can output an insane 900A at variable voltages, for a maximum output power of 522 kW!

All pictures and information: https://kaizerpowerelectronics.dk/teardown/abb-dcs400-900a-522kw-dc-motor-drive-teardown/

[madsbarnkob]

The long and hard journey for a better basement electronics lab is through the first phase of construction!

[madsbarnkob]

April, 9 years old and Alfred, 5 years old assemble and solder a LED blinking Christmas tree. Kids love to build stuff and electronics should be no exception to them!

[madsbarnkob]

A video guide on how to make the, Dell N870P / NPS-885AB, server power supply run outside of its server enclosure. Through trial-and-error I found that a simple circuit of 1K resistor from ground to pins 6A and 6C is required.



Pictures and schematic: https://kaizerpowerelectronics.dk/electronics/server-psu-hack-dell-n870p-nps-885ab-12v-71a-870w/

[madsbarnkob]

I found a discarded welding machine in a scrap yard! It might be an older shielded metal arc welder, also known as SMAW or stick welder. But from what my father told me, these old ESAB machines are impossible to destroy. It got a good new home



Technical walk-through and demonstration of spark generation from my first dual resonant Tesla coil. I finished this dual 811A vacuum tube Tesla Coil back in late 2008, which dates this back 15 years by now! At the time I finished this coil, my best camera at the time, could only record in 640x480 with horrible noise in dark surroundings. This video is the walk-through and demonstration video I wanted to make 15 years ago, but got done now

[madsbarnkob]

A teardown of a 19" 1U server UPS, the APC SC450RMI1U UPS, a run down of the current paths in the system.

[madsbarnkob]

I found a old and discarded smoke cannon at a scrap yard! It looked in rough shape, but still had some oil in its container. With a bit experimentation and at last forcefully feeding it oil, it gave off its smoke!
As a bonus, I got most of my workshop lubricated from half-burned oil smoke raining down droplets everywhere!

[madsbarnkob]

I visited the Danish Electricity Museum back in Autumn 2023 and by pure coincidence it was their last opened weekend of the year and they would pack down to close for good, due to lack of funding.

Finn Hammer from www.hammertone.com built their Tesla coil back in 2003. I got to film its last ever public show, as an re-opening of the museum, might not be what it was originally when it closed.

[madsbarnkob]

This is the first video in a series of 3, on how to get started with the UD3 Tesla coil driver. Huge shoutout to Steve Ward, Netzpfuscher (Jens Kerrinnes), Malte0811 and TMaxElectronics (Thorben Zethoff) for their work on the UD3 platform.

[madsbarnkob]

How far can we push a 3 phase 415 VAC rated power factor correction capacitor? The answer is: 1250 VDC far! We can push it pretty far and get some literally mind blowing results. I put together a capacitor bank of 20 capacitors, weighing 25 kg, a behemoth. Metallized Polypropylene Capacitors, the MKP type, is notorious for high voltage handling, self-healing when abused and very high dI/dt pulse currents due to low ESR.

[madsbarnkob]

A teardown of a desktop UPS, the APC Smart-UPS 1500, a run down of the controller and power electronics of the system.

[madsbarnkob]

A teardown of a 6 kW solar inverter, the Fronius IG Plus 2LT-2. Two phased system split into two inverter boards, based on TO-247 devices in the power electronics section.

All pictures at: https://kaizerpowerelectronics.dk/teardown/fronius-ig-plus-2lt-2-6-kw-solar-inverter-teardown-and-analysis/

[madsbarnkob]

A teardown of a huge (2 full size 19" racks) UPS systems power electronics, the APC SmartUPS VT 40kVA, a run down of the controller and power electronics of the system.

[madsbarnkob]

Imagine yourself at a point opposite of the light source, and it would look like the "shadow" of a black hole.

I filmed a water whirlpool in my garden fire pit. The sun was almost right above me, making the whirlpool cast a shadow. Despite similarities between whirlpools and black holes are generally disproven, and that they are very distinctive phenomena, this video kept bugging me for 3 years and now I'm releasing it for all you, to give your thoughts

[madsbarnkob]

A teardown of a 3kVA rated 19" 2U form factor UPS for server racks, the APC Smart-UPS X SMX3000, a run down of the controller and power electronics of the system.

[madsbarnkob]

A teardown of a desktop "PRO" UPS, the APC Back-UPS PRO 1500, a run down of the controller and power electronics of the system. I also compare it to the APC Smart-UPS 1500 VA, that I did a teardown of, some months ago.

[madsbarnkob]

A guide on how to calculate gate drive transformers, how to wind gate drive transformers and test gate drive transformers. Gate drive transformers are also called GDT for short. The most important aspects is insuring low leakage inductance, no core saturation and having enough peak drive current available for your MOSFETs or IGBTs.

GDT calculation spreadsheet and more information: https://kaizerpowerelectronics.dk/teslacoils/igbt-gate-drive-transformer-gdt-design-construction-and-test/