Author Topic: Factors affecting the current in the primary coil  (Read 310 times)

Offline VNTC

  • High Voltage Enthusiast
  • *
  • Posts: 47
  • Karma: +0/-0
    • View Profile
Factors affecting the current in the primary coil
« on: June 11, 2019, 12:38:09 PM »
•L2C2 not in place
Primary current is proportional on DC supply voltage and the duration of the pulses applied on it
Example with C1=80nF, bus 340Vdc, haft bridge drive(full bridge drive equivalence Vbus*2)
*For the coil 5uH, primary current can reach 550A in after 60us.(image1)
*For the coil 10uH, primary current can reached 450A after 90us.
*For the coil 10uH, primary current can reached 390A after 110us.

•L2C2 in place, K=.16
Depend on the situation of the tuning the load resistor at secondary coil will reflect to primary coil to reduce or make grow the primary current. In good tuning it works something like a low frequency transformer (the primary current depend on the load on the secondary).

Image 2 schematic of a DRSSTC in 2 situation good and bad tuning
Image 3 Primary current grow gradually and maintain high level >350A, power out high>50kw
Image 4 Primary current maintain low level<150A, power out low<30Kw.

Offline Uspring

  • High Voltage Technician
  • ***
  • Posts: 109
  • Karma: +8/-0
    • View Profile
Re: Factors affecting the current in the primary coil
« Reply #1 on: June 12, 2019, 11:23:02 AM »
The primary current rampup, disregarding secondary loading, can be calculated following chapter 3 here: http://kaizerpowerelectronics.dk/tesla-coils/drsstc-design-guide/mmc-tank-capacitor/ . It is based on the fact, that for every voltage switch of the bridge, the voltage change at the bridge is added to the primary cap voltage.

For a primary tank loaded by a secondary tank, the max primary current can be described by an effective Q of the primary tank, which is imposed on it by secondary loading. For a discussion of this look here: https://4hv.org/e107_plugins/forum/forum_viewtopic.php?163363

Offline Mads Barnkob

  • Administrator
  • High Voltage Expert
  • *****
  • Posts: 1143
  • Karma: +17/-0
  • Denmark
    • View Profile
    • Kaizer Power Electronics
Re: Factors affecting the current in the primary coil
« Reply #2 on: June 12, 2019, 09:52:03 PM »
VNTC, while I unfortunately does not have much to add, I just wanted to say I follow your discussions of theoretic operation with great interest. Uspring is sharp as usual :)
http://www.kaizerpowerelectronics.dk - Tesla coils, high voltage, pulse power, audio and general electronics

High Voltage Forum

Re: Factors affecting the current in the primary coil
« Reply #2 on: June 12, 2019, 09:52:03 PM »

 


* Recent Topics and Posts

post Re: Drsstc 3
[Dual Resonant Solid State Tesla coils]
oneKone
Today at 09:09:26 AM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils]
Netzpfuscher
Today at 09:09:19 AM
post Re: Problems with my first DRSSTC
[Dual Resonant Solid State Tesla coils]
davekni
Today at 04:33:46 AM
post Re: Phoenix's Large DRSSTC II
[Dual Resonant Solid State Tesla coils]
davekni
Today at 04:03:42 AM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils]
acobaugh
Today at 01:40:51 AM
post Re: Problems with my first DRSSTC
[Dual Resonant Solid State Tesla coils]
bozidar
October 22, 2019, 07:44:55 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 22, 2019, 05:56:52 PM
post Re: Van de Graaf is leaking charge
[Static electricity]
nik282000
October 22, 2019, 04:56:19 PM
post Re: Beetle in a Geißler tube
[Science, research and news in other fields than electronics]
shrad
October 22, 2019, 02:51:27 PM
post Re: Phoenix's Large DRSSTC II
[Dual Resonant Solid State Tesla coils]
Phoenix
October 22, 2019, 12:38:33 PM
post Re: Phoenix's Large DRSSTC II
[Dual Resonant Solid State Tesla coils]
shrad
October 22, 2019, 12:26:39 PM
post Re: Phoenix's Large DRSSTC II
[Dual Resonant Solid State Tesla coils]
Phoenix
October 22, 2019, 11:38:31 AM
post Re: Phoenix's Large DRSSTC II
[Dual Resonant Solid State Tesla coils]
shrad
October 22, 2019, 09:48:57 AM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils]
Hydron
October 22, 2019, 08:51:33 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 22, 2019, 08:38:14 AM
post Re: QCW Capacitor Torture Testing
[Dual Resonant Solid State Tesla coils]
Weston
October 22, 2019, 07:32:56 AM
post Re: Next Gen DRSSTC
[Dual Resonant Solid State Tesla coils]
acobaugh
October 22, 2019, 06:05:00 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
Weston
October 22, 2019, 03:27:46 AM
post Re: Phoenix's Large DRSSTC II
[Dual Resonant Solid State Tesla coils]
Phoenix
October 22, 2019, 12:13:05 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 21, 2019, 10:00:06 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 21, 2019, 09:56:51 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
Weston
October 21, 2019, 09:45:49 PM
post Re: Phoenix's Large DRSSTC II
[Dual Resonant Solid State Tesla coils]
shrad
October 21, 2019, 09:03:49 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 21, 2019, 08:28:07 AM
post Re: 50KVA generator on a 4 cylinder Dorman diesel engine
[Electronic circuits]
johnf
October 21, 2019, 07:50:47 AM
post Re: Phoenix's Large DRSSTC II
[Dual Resonant Solid State Tesla coils]
Phoenix
October 21, 2019, 07:07:43 AM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
petespaco
October 21, 2019, 01:24:00 AM
post Re: 50KVA generator on a 4 cylinder Dorman diesel engine
[Electronic circuits]
DICKEYBIRD
October 20, 2019, 10:39:59 PM
post Re: Help for people buying the "12-48 Volt 1800/2500 Watt ZVS induction Heater"
[Electronic circuits]
DICKEYBIRD
October 20, 2019, 10:34:22 PM
post Re: QCW Capacitor Torture Testing
[Dual Resonant Solid State Tesla coils]
Hydron
October 20, 2019, 12:27:54 PM
post Re: QCW Capacitor Torture Testing
[Dual Resonant Solid State Tesla coils]
klugesmith
October 19, 2019, 10:15:56 PM
post More things wanting homes
[Sell / Buy / Trade]
klugesmith
October 19, 2019, 09:56:15 PM
post How to get rid of stuff?
[Sell / Buy / Trade]
klugesmith
October 19, 2019, 09:43:02 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 18, 2019, 05:35:02 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
T3sl4co1l
October 18, 2019, 04:29:03 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 18, 2019, 02:09:23 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 18, 2019, 09:00:52 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
T3sl4co1l
October 18, 2019, 08:05:06 AM
post Re: Problems with my first DRSSTC
[Dual Resonant Solid State Tesla coils]
davekni
October 18, 2019, 06:30:06 AM
post Re: so far video
[Spark gap Tesla coils]
thedoc298
October 18, 2019, 04:42:52 AM
post QCW Capacitor Torture Testing
[Dual Resonant Solid State Tesla coils]
Weston
October 18, 2019, 02:41:44 AM
post Re: Problems with my first DRSSTC
[Dual Resonant Solid State Tesla coils]
bozidar
October 17, 2019, 05:53:09 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 17, 2019, 05:09:29 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 17, 2019, 04:04:53 PM
post Re: making a useable induction forge.
[Transformer (iron core)]
T3sl4co1l
October 17, 2019, 11:30:19 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 17, 2019, 10:59:31 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
Bert911
October 17, 2019, 10:02:12 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
rustedone
October 17, 2019, 08:19:19 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
Bert911
October 17, 2019, 07:57:58 AM
post Re: making a useable induction forge.
[Transformer (iron core)]
T3sl4co1l
October 17, 2019, 06:19:14 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