Author Topic: [Development] Project of an SSTC driver.  (Read 1590 times)

Offline Bambinz

  • High Voltage Enthusiast
  • *
  • Posts: 42
  • Karma: +1/-1
    • View Profile
[Development] Project of an SSTC driver.
« on: April 29, 2019, 08:25:46 PM »
Dear all,
I am developing a new SSTC driver to drive my small teslacoil, because the current driver is not very reliable.

The characteristic will be the followings:
   - Half-bridge configuration
   - Feedback on the secondary with an current trasformer.
   - 2x Separated Board: 1 board for the driver and one board for the half bridge
   - Measure of the primary current
   - Measure of the switch frequency
   - Measure of the mosfet temperature
   - UVLO (under voltage protection)
   - Mosfet protection (Gate protection with zener, Drain-Source protection with snubber and TVS)
   - Minimized connection inductance to allow high current switching at high frequency.
   - Microcontroller STM32F103 to acquire the data, enable/disable the driver in the case of fault condition and generate the interrupt signal.
   - Wi-Fi connect with an ESP32 to send all acquired data to an computer software and to receive the Frequency and duty-cycle of the interrupter, in addition in future to stream the music

If you have any suggestion please write me!!!
I have completed the bridge schematic, tomorrow I will post them.

Offline oneKone

  • High Voltage Engineer
  • ****
  • Posts: 314
  • Karma: +8/-0
    • View Profile
Re: [Development] Project of an SSTC driver.
« Reply #1 on: April 30, 2019, 11:05:17 AM »
Sounds like an interesting project. I'm assuming your going to measure the switching frequency from secondary current feedback?

Offline Bambinz

  • High Voltage Enthusiast
  • *
  • Posts: 42
  • Karma: +1/-1
    • View Profile
Re: [Development] Project of an SSTC driver.
« Reply #2 on: April 30, 2019, 12:48:21 PM »
Yes, I will read the switching frequency from the secondary current feedback, that will be also the driving signal for the driver.

In addition, I would try to implement a ZCS (Zero-current-switch) by reading the primary current and then by using a zero zero cross detector to enable the driver only near the zero current. But i think that will be difficult at 1MHz.


Offline Netzpfuscher

  • High Voltage Technician
  • ***
  • Posts: 105
  • Karma: +5/-0
    • View Profile
Re: [Development] Project of an SSTC driver.
« Reply #3 on: April 30, 2019, 01:04:44 PM »
If you are planning to have a PC application you can take a look at our Teslaterm: https://github.com/Netzpfuscher/Teslaterm/tree/typescript
I also have a ESP32 Interface: https://github.com/Netzpfuscher/UD3_ESP32

Teslaterm is very flexible. It's not specifically designed for UD3. You can send text to the terminal window and use the c library to send telemetry like scope data or data for the gauges. I even have simple graphics functions for sending text/lines/colors from the microcontroller to the terminal screen.



Offline Bambinz

  • High Voltage Enthusiast
  • *
  • Posts: 42
  • Karma: +1/-1
    • View Profile
Re: [Development] Project of an SSTC driver.
« Reply #4 on: April 30, 2019, 06:22:36 PM »
Thank you very much for the indication. The software is fantastic!
I will try to adapt the software with my data.
Eventually, I will rebuild a simplified interface with python :)

Offline Bambinz

  • High Voltage Enthusiast
  • *
  • Posts: 42
  • Karma: +1/-1
    • View Profile
Re: [Development] Project of an SSTC driver.
« Reply #5 on: May 03, 2019, 07:52:19 PM »
This is the schematic of the half-bridge:

Offline Bambinz

  • High Voltage Enthusiast
  • *
  • Posts: 42
  • Karma: +1/-1
    • View Profile
Re: [Development] Project of an SSTC driver.
« Reply #6 on: May 05, 2019, 01:33:37 PM »
I would like to make some changes in the driver.
I have found a 440VA 53VAC transformer that I would like to use for the next teslacoil.

Therefore VDC will be +- 75V (that can reach +-90 without load), therefore I have choosed a mosfet of 250Vds ->  IRFB4229
With a very short and semplified thermal calculation, result that can handle about 55A with the interrupter set to 20Hz and duty-cycle of 5% (Setted as worst case).

I would like to have the same carachteristic of the small coil with an high peak current and a low duty-cycle to have an low mean power and an high pulse power.

Thereticaly the small teslacoil have an peak current of about 30A, with a 24V supply and a push-pull driver will results in a 30A*24V*2= 1440W (peak power) and an average power of 40W. The results is about 7-8cm of spark.

Therefore the average current will be about: 55A * 0.05 = 2.75A with an average power of 75V*2.75 = 206W. And a Peak power of about 75V*55A =4125W

Therefore we will have a 4x power therefore I will expect a sparklength in the range of 30cm. Can be correct?

Offline Bambinz

  • High Voltage Enthusiast
  • *
  • Posts: 42
  • Karma: +1/-1
    • View Profile
Re: [Development] Project of an SSTC driver.
« Reply #7 on: August 08, 2019, 11:56:51 AM »
I have just ordered the board from PCBWay for the driver. I hope that all works good xD
In the next day I will post the complete schematic :)

Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1432
  • Karma: +24/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: [Development] Project of an SSTC driver.
« Reply #8 on: August 16, 2019, 10:07:31 PM »
I would like to make some changes in the driver.
I have found a 440VA 53VAC transformer that I would like to use for the next teslacoil.

Therefore VDC will be +- 75V (that can reach +-90 without load), therefore I have choosed a mosfet of 250Vds ->  IRFB4229
With a very short and semplified thermal calculation, result that can handle about 55A with the interrupter set to 20Hz and duty-cycle of 5% (Setted as worst case).

I would like to have the same carachteristic of the small coil with an high peak current and a low duty-cycle to have an low mean power and an high pulse power.

Thereticaly the small teslacoil have an peak current of about 30A, with a 24V supply and a push-pull driver will results in a 30A*24V*2= 1440W (peak power) and an average power of 40W. The results is about 7-8cm of spark.

Therefore the average current will be about: 55A * 0.05 = 2.75A with an average power of 75V*2.75 = 206W. And a Peak power of about 75V*55A =4125W

Therefore we will have a 4x power therefore I will expect a sparklength in the range of 30cm. Can be correct?

Spark length estimation for SSTC was never really linear in my experiments, it felt more like that I could just keep adding topload capacitance to get longer arcs :)
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics
https://www.youtube.com/KaizerPowerElectronicsDk60/join - Please consider supporting the forum, websites and youtube channel!

High Voltage Forum

Re: [Development] Project of an SSTC driver.
« Reply #8 on: August 16, 2019, 10:07:31 PM »

 


* Recent Topics and Posts

post Re: PCB etching, DIY (chemistry mostly)
[Printed Circuit Board]
klugesmith
July 10, 2020, 11:35:05 PM
post Re: Capacitors and arcs
[Beginners]
Morvandium
July 10, 2020, 11:10:57 PM
post Re: PCB etching, DIY (chemistry mostly)
[Printed Circuit Board]
Morvandium
July 10, 2020, 11:06:07 PM
post Re: Capacitors and arcs
[Beginners]
k42
July 10, 2020, 08:53:06 PM
post Re: XRay Tank- any ideas about what is inside
[Transformer (Ferrite Core)]
HighVoltageRulezz
July 10, 2020, 07:20:48 PM
post Re: Why is Auto-transformer (variac) called transformer??
[Beginners]
Morvandium
July 10, 2020, 04:45:43 PM
post Re: Cathodes in Compact Fluorescent Lamps
[Light, Lasers and Optics]
T3sl4co1l
July 10, 2020, 10:57:29 AM
post Re: Configuration of a half bridge.
[Electronic Circuits]
hammertone
July 10, 2020, 08:55:30 AM
post Re: Configuration of a half bridge.
[Electronic Circuits]
johnf
July 10, 2020, 08:48:33 AM
post Re: Cathodes in Compact Fluorescent Lamps
[Light, Lasers and Optics]
davekni
July 10, 2020, 07:00:13 AM
post Re: Configuration of a half bridge.
[Electronic Circuits]
davekni
July 10, 2020, 06:57:36 AM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
davekni
July 10, 2020, 05:44:54 AM
post Re: Configuration of a half bridge.
[Electronic Circuits]
johnf
July 09, 2020, 09:23:38 PM
post Re: Easy to build Polyphonic MIDI Interrupter
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
Max
July 09, 2020, 09:09:08 PM
post Re: Cathodes in Compact Fluorescent Lamps
[Light, Lasers and Optics]
klugesmith
July 09, 2020, 07:00:49 PM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
TMaxElectronics
July 09, 2020, 02:33:38 PM
post Re: Configuration of a half bridge.
[Electronic Circuits]
hammertone
July 09, 2020, 12:16:32 PM
post Re: Configuration of a half bridge.
[Electronic Circuits]
hammertone
July 09, 2020, 11:46:10 AM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
Twospoons
July 09, 2020, 10:56:18 AM
post Re: Configuration of a half bridge.
[Electronic Circuits]
johnf
July 09, 2020, 08:37:52 AM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
klugesmith
July 09, 2020, 06:45:18 AM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
TMaxElectronics
July 09, 2020, 02:36:22 AM
post Re: Configuration of a half bridge.
[Electronic Circuits]
Mads Barnkob
July 08, 2020, 09:43:20 PM
post Re: Welcome new members, come say hello and tell a little about yourself :)
[General Chat]
Morvandium
July 08, 2020, 09:33:35 PM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
johnf
July 08, 2020, 09:23:14 PM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
klugesmith
July 08, 2020, 09:16:42 PM
post Re: Configuration of a half bridge.
[Electronic Circuits]
johnf
July 08, 2020, 09:00:04 PM
post Re: Configuration of a half bridge.
[Electronic Circuits]
Mads Barnkob
July 08, 2020, 04:25:53 PM
post Re: Configuration of a half bridge.
[Electronic Circuits]
ElectroXa
July 08, 2020, 10:03:25 AM
post Re: Configuration of a half bridge.
[Electronic Circuits]
hammertone
July 08, 2020, 08:39:10 AM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
Twospoons
July 08, 2020, 08:34:02 AM
post Re: Measuring LED efficiency
[Light, Lasers and Optics]
davekni
July 08, 2020, 04:39:10 AM
post Measuring LED efficiency
[Light, Lasers and Optics]
TMaxElectronics
July 08, 2020, 12:46:23 AM
post Re: Configuration of a half bridge.
[Electronic Circuits]
hammertone
July 07, 2020, 10:28:37 PM
post Re: Configuration of a half bridge.
[Electronic Circuits]
ElectroXa
July 07, 2020, 10:09:22 PM
post Re: Configuration of a half bridge.
[Electronic Circuits]
hammertone
July 07, 2020, 09:36:53 PM
post Re: Configuration of a half bridge.
[Electronic Circuits]
johnf
July 07, 2020, 09:20:12 PM
post Configuration of a half bridge.
[Electronic Circuits]
hammertone
July 07, 2020, 09:07:10 PM
post Re: Help needed: HV Driver circuit
[Transformer (Ferrite Core)]
T3sl4co1l
July 06, 2020, 10:29:17 PM
post Re: induction heater troubleshooting help
[Electronic Circuits]
petespaco
July 06, 2020, 06:53:26 PM
post Re: adventures in homemade flyback bobbins.
[Transformer (Ferrite Core)]
HighVoltageRulezz
July 06, 2020, 01:18:03 PM
post Re: Help needed: HV Driver circuit
[Transformer (Ferrite Core)]
HighVoltageRulezz
July 06, 2020, 01:05:32 PM
post Re: Help needed: HV Driver circuit
[Transformer (Ferrite Core)]
T3sl4co1l
July 06, 2020, 06:14:56 AM
post Re: Cathodes in Compact Fluorescent Lamps
[Light, Lasers and Optics]
klugesmith
July 05, 2020, 06:31:21 PM
post Re: Cathodes in Compact Fluorescent Lamps
[Light, Lasers and Optics]
HiVi
July 05, 2020, 12:30:02 PM
post Re: IGBTs keep dying (un-solved again)
[Dual Resonant Solid State Tesla coils (DRSSTC)]
TMaxElectronics
July 04, 2020, 10:35:50 PM
post Re: IGBTs keep dying (un-solved again)
[Dual Resonant Solid State Tesla coils (DRSSTC)]
davekni
July 04, 2020, 08:56:15 PM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils (DRSSTC)]
TMaxElectronics
July 04, 2020, 04:37:32 PM
post Re: IGBTs keep dying (un-solved again)
[Dual Resonant Solid State Tesla coils (DRSSTC)]
TMaxElectronics
July 04, 2020, 04:14:44 PM
post Dell PowerEdge M1000E Blade Server Teardown
[Computers, Microcontrollers, Programmable Logic, Interfaces and Displays]
Mads Barnkob
July 04, 2020, 01:52:14 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