Author Topic: [Development] Project of an SSTC driver.  (Read 508 times)

Offline Bambinz

  • High Voltage Enthusiast
  • *
  • Posts: 34
  • 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: 263
  • Karma: +6/-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: 34
  • 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 Experimenter
  • **
  • Posts: 81
  • Karma: +4/-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: 34
  • 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: 34
  • 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: 34
  • 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: 34
  • 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: 1069
  • Karma: +16/-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

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: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Lane
Today at 10:45:26 AM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Lane
Today at 06:21:45 AM
post Re: My second DRSSTC
[Dual Resonant Solid State Tesla coils]
Hydron
Today at 12:59:20 AM
post Re: Twin System Build
[Dual Resonant Solid State Tesla coils]
fnordest
Today at 12:18:48 AM
post Re: Drsstc 3
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
August 16, 2019, 10:34:46 PM
post Re: Teardown of Danfoss VLT6000 4kW Variable Frequency Drive
[Electronic circuits]
Mads Barnkob
August 16, 2019, 10:26:19 PM
post Re: My second DRSSTC
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
August 16, 2019, 10:19:18 PM
post Re: [Development] Project of an SSTC driver.
[Solid state Tesla coils]
Mads Barnkob
August 16, 2019, 10:07:31 PM
post Re: Suitable capacitors and switches? 10kV
[Capacitor banks]
T3sl4co1l
August 16, 2019, 09:28:35 PM
post Re: Suitable capacitors and switches? 10kV
[Capacitor banks]
ElectroXa
August 16, 2019, 09:17:04 PM
post Re: ESAB Power TIG 200 Welder Teardown
[Electronic circuits]
T3sl4co1l
August 16, 2019, 09:14:36 PM
post ESAB Power TIG 200 Welder Teardown
[Electronic circuits]
Mads Barnkob
August 16, 2019, 08:03:18 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
petespaco
August 16, 2019, 01:49:53 PM
post Suitable capacitors and switches? 10kV
[Capacitor banks]
MrFox
August 16, 2019, 12:21:36 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Lane
August 16, 2019, 11:22:45 AM
post Re: Small Phase change build R600a
[General chatting]
DashApple
August 15, 2019, 06:23:40 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
rikkitikkitavi
August 15, 2019, 06:17:55 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Lane
August 15, 2019, 01:51:04 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
petespaco
August 14, 2019, 07:05:57 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
Bert911
August 14, 2019, 03:42:34 PM
post Re: Van de Graaf is leaking charge
[Static electricity]
Patric
August 14, 2019, 02:56:49 PM
post Re: Van de Graaf is leaking charge
[Static electricity]
ElectroXa
August 14, 2019, 01:42:21 PM
post Re: My second DRSSTC
[Dual Resonant Solid State Tesla coils]
erdal
August 14, 2019, 12:53:10 PM
post Van de Graaf is leaking charge
[Static electricity]
Patric
August 14, 2019, 09:22:21 AM
post Re: Drsstc 3
[Dual Resonant Solid State Tesla coils]
oneKone
August 14, 2019, 04:39:11 AM
post Re: MMC orientation and variac
[Spark gap Tesla coils]
thedoc298
August 13, 2019, 07:10:31 PM
post Re: MMC orientation and variac
[Spark gap Tesla coils]
MRMILSTAR
August 13, 2019, 05:17:23 AM
post MMC orientation and variac
[Spark gap Tesla coils]
thedoc298
August 12, 2019, 09:54:35 PM
post Re: My second DRSSTC
[Dual Resonant Solid State Tesla coils]
erdal
August 12, 2019, 08:40:16 PM
post Re: Small Phase change build R600a
[General chatting]
Hydron
August 12, 2019, 07:27:23 PM
post Re: Teardown of Danfoss VLT6000 4kW Variable Frequency Drive
[Electronic circuits]
klugesmith
August 12, 2019, 09:18:15 AM
post Re: Teardown of Danfoss VLT6000 4kW Variable Frequency Drive
[Electronic circuits]
shrad
August 12, 2019, 09:06:34 AM
post Re: Teardown of Danfoss VLT6000 4kW Variable Frequency Drive
[Electronic circuits]
klugesmith
August 12, 2019, 09:02:38 AM
post Re: A problem solved with hand tools
[General chatting]
klugesmith
August 12, 2019, 08:29:20 AM
post Re: Ebay [US]: MITSUBISHI CM300 1200V-300A IGBT (30$ a piece)
[Sell / Buy / Trade]
oneKone
August 12, 2019, 05:25:24 AM
post Re: Ebay [US]: MITSUBISHI CM300 1200V-300A IGBT (30$ a piece)
[Sell / Buy / Trade]
acobaugh
August 10, 2019, 08:14:35 PM
post Re: 30% power increase
[Spark gap Tesla coils]
MRMILSTAR
August 08, 2019, 04:18:09 PM
post Re: "LightningStorm" VTTC project
[Vacuum tube Tesla coils]
Bambinz
August 08, 2019, 01:15:11 PM
post Re: Twin System Build
[Dual Resonant Solid State Tesla coils]
Bambinz
August 08, 2019, 12:15:26 PM
post Re: My second DRSSTC
[Dual Resonant Solid State Tesla coils]
Bambinz
August 08, 2019, 11:58:47 AM
post Re: [Development] Project of an SSTC driver.
[Solid state Tesla coils]
Bambinz
August 08, 2019, 11:56:51 AM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils]
Netzpfuscher
August 08, 2019, 10:04:39 AM
post Re: My second DRSSTC
[Dual Resonant Solid State Tesla coils]
Mads Barnkob
August 08, 2019, 08:35:57 AM
post Re: 30% power increase
[Spark gap Tesla coils]
Mads Barnkob
August 08, 2019, 08:33:01 AM
post Re: Using R/C motors as 3 phase generators.
[General chatting]
Patrick
August 07, 2019, 09:16:57 PM
post Re: Using R/C motors as 3 phase generators.
[General chatting]
shrad
August 07, 2019, 01:15:46 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
petespaco
August 07, 2019, 02:32:25 AM
post 30% power increase
[Spark gap Tesla coils]
MRMILSTAR
August 06, 2019, 04:35:37 PM
post Re: Drsstc 3
[Dual Resonant Solid State Tesla coils]
fnordest
August 06, 2019, 10:56:30 AM
post Re: Drsstc 3
[Dual Resonant Solid State Tesla coils]
oneKone
August 06, 2019, 05:11:10 AM

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