Author Topic: Is this this mini circuit goin to work ? (small DRSSTC)  (Read 536 times)

Offline hashtala

  • High Voltage Enthusiast
  • *
  • Posts: 7
  • Karma: +0/-0
    • View Profile
Is this this mini circuit goin to work ? (small DRSSTC)
« on: November 21, 2020, 01:00:41 PM »
I am trying to build a DRSSTC but I am short on part at this time.

I came up with a circuit that might work but I am not sure.

https://ibb.co/Y0nqWG1

will this give me any result if I use lower voltage for safety?
also I will be using PWM with duty cycle of about 200us and 200hz


Offline Max

  • High Voltage Technician
  • ***
  • Posts: 175
  • Karma: +17/-1
  • "With the first link, the chain is forged. [...]"
    • View Profile
    • My Youtube Channel
Re: Is this this mini circuit goin to work ? (small DRSSTC)
« Reply #1 on: November 21, 2020, 05:39:42 PM »
I see a minor flaw in that circuit: if Q1 is enabled/conducts it shorts the mains supply...

If you're that short on parts, forget about DRSSTCs. "Single MOSFET SSTC" or "Slayer Exciter", sometimes also found when searching for "HFSSTC" is what you want to build. Those circuits really need only a hand full of parts, nothing complicated or special. Most of them run reliable at about 20-50V, consuming around 100W. This gives you a couple centimeters of output. Not very spectacular, just like the BOM cost. And by far not as dangerous as your circuit either (still: be careful!)

DRSSTC running from mains power is something that requires careful design otherwise you will not only kill pretty much any part of the circuit but also put yourself in danger. Shorting mains supply - especially using capacitors - can lead to a decent explosion as I've demonstrated in the following video (jump to 0:52 and turn down the volume!):

Granted, that was more capacitance than you planned in your circuit but I also used bricks. Compared to small TO-264 MOSFETS they need an order of magnitude more energy before they really go kaboom. tl;dr: don't short the mains supply.


Kind regards,
Max
« Last Edit: November 21, 2020, 05:42:01 PM by Max »

Offline hashtala

  • High Voltage Enthusiast
  • *
  • Posts: 7
  • Karma: +0/-0
    • View Profile
Re: Is this this mini circuit goin to work ? (small DRSSTC)
« Reply #2 on: November 21, 2020, 07:11:09 PM »
Thanks for your answer.

I was worried about the same issue. I though it would not explode if I shorted it for a short period of time. I have additional light bulb in series before something explodes it will turn on and absorb energy.


BUT: I have a question.

Aren't we technically shoring main supply to ground in half bridge case? since primary actually has very low ohmic resistance?

Offline hashtala

  • High Voltage Enthusiast
  • *
  • Posts: 7
  • Karma: +0/-0
    • View Profile
Re: Is this this mini circuit goin to work ? (small DRSSTC)
« Reply #3 on: November 21, 2020, 07:47:13 PM »
Also

which circuit do you think will perform better

https://ibb.co/NY9FBGg    left or right

or are they the same in terms of shorting?


Offline davekni

  • High Voltage Expert
  • ******
  • Posts: 1180
  • Karma: +57/-0
  • Physicist, engineer (electronic), and hobbiest
    • View Profile
Re: Is this this mini circuit goin to work ? (small DRSSTC)
« Reply #4 on: November 21, 2020, 08:04:06 PM »
"Aren't we technically shoring main supply to ground in half bridge case? since primary actually has very low ohmic resistance?"

No for two reasons.  First, the half-bridge is running at high frequency, where reactance of the inductor is much higher than DC (ohmic) resistance.  Second, if the half-bridge were to run at low frequency, the series capacitor reactance becomes high, so limits current.

For your two circuits, try them at low power and see what happens.  Or, better, simulate the two circuits.  There are free on-line simulators, and free downloadable ones such as LTSpice for larger circuits.
David Knierim

Offline hashtala

  • High Voltage Enthusiast
  • *
  • Posts: 7
  • Karma: +0/-0
    • View Profile
Re: Is this this mini circuit goin to work ? (small DRSSTC)
« Reply #5 on: November 21, 2020, 08:50:00 PM »
davekni, thank you for your reply.

resonance frequency of my sytem is about 400,000Hz. This means I will be having high frequency input signal to power transistor as well. I think my second circuit is going to address that issue, but problem is that on low frequency there is no protection. ( I will be turning it on 200 times per second with short impulses (200 us long))


I was planning to run in on low power, thanks for your suggestion!

High Voltage Forum

Re: Is this this mini circuit goin to work ? (small DRSSTC)
« Reply #5 on: November 21, 2020, 08:50:00 PM »

 


* Recent Topics and Posts

post ZVS long cable freq stabilization
[Transformer (Ferrite Core)]
kreasteve
Today at 02:56:13 AM
post Re: Exploding phones and electronics, a mini-series of 50kA discharges!
[Capacitor Banks]
Mads Barnkob
June 19, 2021, 05:30:28 PM
post Re: What is the guidence on SpaceX rockets based on ? PID's?
[General Chat]
Mads Barnkob
June 18, 2021, 07:48:01 PM
post Re: What is the guidence on SpaceX rockets based on ? PID's?
[General Chat]
Patrick
June 18, 2021, 02:48:57 AM
post Re: Syntherrupter - A Feature-rich, Polyphonic Interrupter
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
Max
June 18, 2021, 01:22:10 AM
post Re: LCR meter recommendation
[Sell / Buy / Trade]
TMaxElectronics
June 18, 2021, 01:21:53 AM
post Exploding phones and electronics, a mini-series of 50kA discharges!
[Capacitor Banks]
Mads Barnkob
June 17, 2021, 08:27:10 PM
post Re: LCR meter recommendation
[Sell / Buy / Trade]
Mads Barnkob
June 17, 2021, 08:23:57 PM
post Re: LCR meter recommendation
[Sell / Buy / Trade]
Max
June 17, 2021, 02:51:45 PM
post Re: LCR meter recommendation
[Sell / Buy / Trade]
Da_Stier
June 17, 2021, 02:01:23 PM
post LCR meter recommendation
[Sell / Buy / Trade]
the_anomaly
June 17, 2021, 01:58:48 PM
post Re: The dramatic difference between wet and dry sphere splashes
[Science, Research and News In Other Fields Than Electronics]
Mads Barnkob
June 17, 2021, 12:42:03 PM
post Re: The dramatic difference between wet and dry sphere splashes
[Science, Research and News In Other Fields Than Electronics]
haversin
June 17, 2021, 02:49:00 AM
post Re: The dramatic difference between wet and dry sphere splashes
[Science, Research and News In Other Fields Than Electronics]
Mads Barnkob
June 16, 2021, 08:54:32 PM
post Re: The dramatic difference between wet and dry sphere splashes
[Science, Research and News In Other Fields Than Electronics]
davekni
June 16, 2021, 08:00:50 PM
post Re: The dramatic difference between wet and dry sphere splashes
[Science, Research and News In Other Fields Than Electronics]
haversin
June 16, 2021, 05:40:40 PM
post Demo Coil Protection
[Dual Resonant Solid State Tesla coils (DRSSTC)]
alan sailer
June 16, 2021, 05:39:14 PM
post Re: What is the guidence on SpaceX rockets based on ? PID's?
[General Chat]
Twospoons
June 16, 2021, 10:20:30 AM
post Re: What is the guidence on SpaceX rockets based on ? PID's?
[General Chat]
Patrick
June 16, 2021, 07:33:15 AM
post Re: Through-hole layout of UD2.7C universal driver
[Dual Resonant Solid State Tesla coils (DRSSTC)]
dbach
June 15, 2021, 01:21:38 PM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 15, 2021, 12:02:58 PM
post Re: Through-hole layout of UD2.7C universal driver
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
June 15, 2021, 06:52:56 AM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
thedoc298
June 15, 2021, 05:43:07 AM
post Re: Through-hole layout of UD2.7C universal driver
[Dual Resonant Solid State Tesla coils (DRSSTC)]
dbach
June 15, 2021, 05:26:34 AM
post The dramatic difference between wet and dry sphere splashes
[Science, Research and News In Other Fields Than Electronics]
haversin
June 15, 2021, 02:27:03 AM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 14, 2021, 01:06:02 AM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
June 14, 2021, 12:44:31 AM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 14, 2021, 12:41:33 AM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 14, 2021, 12:11:13 AM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
June 13, 2021, 11:52:11 PM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 13, 2021, 11:38:44 PM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 13, 2021, 10:26:51 PM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
June 13, 2021, 09:57:56 PM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 13, 2021, 09:29:08 PM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
June 13, 2021, 08:53:25 PM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 13, 2021, 07:22:05 PM
post Re: First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
June 13, 2021, 07:02:28 PM
post Re: HFSSTC with fixed crystal-controlled frequency
[Solid State Tesla Coils (SSTC)]
Steve Ward
June 13, 2021, 06:25:20 PM
post First middle sized DRSSTC - Phase lead tuning
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Rapy2
June 13, 2021, 02:48:59 PM
post OpenTheremin v3 loosing calibration after minutes
[Electronic Circuits]
gianpaolo
June 13, 2021, 12:00:09 PM
post Re: What is the guidence on SpaceX rockets based on ? PID's?
[General Chat]
Mads Barnkob
June 12, 2021, 07:28:03 PM
post Re: Rocket engine questions
[General Chat]
klugesmith
June 12, 2021, 07:23:12 PM
post Re: Rocket engine questions
[General Chat]
rikkitikkitavi
June 12, 2021, 12:24:06 PM
post Re: Nice PC Board Tesla
[Solid State Tesla Coils (SSTC)]
Da_Stier
June 12, 2021, 10:06:18 AM
post Re: Rocket engine questions
[General Chat]
plasma
June 12, 2021, 10:01:29 AM
post Re: Nice PC Board Tesla
[Solid State Tesla Coils (SSTC)]
Twospoons
June 12, 2021, 08:47:08 AM
post Re: What is the guidence on SpaceX rockets based on ? PID's?
[General Chat]
Patrick
June 12, 2021, 07:03:10 AM
post Re: Complications in the design of the first DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
PEDRO HENRIQUE
June 12, 2021, 06:42:56 AM
post Re: Nice PC Board Tesla
[Solid State Tesla Coils (SSTC)]
davekni
June 12, 2021, 04:20:53 AM
post Re: SKM100 Mini DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
Willsmith001
June 11, 2021, 11:08:24 PM

Sitemap 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 
SimplePortal 2.3.6 © 2008-2014, SimplePortal