Tag Archives: Capacitor

5kJ capacitor bank fired at 2kJ charge

Second charge experiment with the bank of 35 electrolytic capacitors connected in series. The bank did however not get charged to more than 50% of its maximum holding charge, properly due to too weak power supply. More results will follow … Continue reading

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New online calculator: Snubber capacitor calculator

Calculate the needed snubber capacitance in order to protect your inverters IGBT/MOSFETs from too high swithcing transients, depending on your busbar layout and stray inductance. Try the new online calculator at: http://kaizerpowerelectronics.dk/calculators/snubber-capacitor-calculator/

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Snubber capacitor calculator

Here you can calculate the snubber capacitance that is needed to keep transient voltages below the maximum allowed value. Stray inductance is the inductance in the primary circuit of the inverter. If the stray inductance is not known, the two … Continue reading

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5kJ capacitor bank, 1.5kJ BANG test at end!

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.

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Kone elevator 45 kW motor drive teardown

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. … Continue reading

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Snubber capacitor selection for Tesla coils and inverters

This is chapter 6 of the DRSSTC design guide: Snubber capacitor When we switch on and off very large peak currents in a DRSSTC, residual energy will be trapped in the circuit stray inductance of the switching devices and busbar, that causes … Continue reading

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DC bus capacitor selection for Tesla coils

Chapter 4 of the DRSSTC design guide: DC bus capacitor The DC bus capacitors are the main energy storage for a DRSSTC inverter, it is important to have the energy needed for high BPS operation of the DRSSTC and the … Continue reading

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Another LCD TV repair

I repaired a Sodium LWD400-SI 40″ LCD TV, another case of defective capXcon capacitors that was sitting in a too hot power supply. http://kaizerpowerelectronics.dk/general-electronics/sodium-40-lcd-tv-repair/

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Sodium 40″ LCD TV repair

Introduction A friend of mine had this defective TV set and wanted me to take a look at it. When plugged in the red led would light up and you could power it on to get a green led, but … Continue reading

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DRSSTC design guide

Introduction to the guide This is a guide that aims to explain a few in depth details and best practices that one should have in mind when designing and building a Dual Resonant Solid State Tesla Coil (DRSSTC). It is … Continue reading

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