Sonsivri
 
*
Welcome, Guest. Please login or register.
Did you miss your activation email?
June 23, 2021, 01:21:15 01:21


Login with username, password and session length


Pages: [1]
Print
Author Topic: [Req] High Power SCR gate driver circuit  (Read 758 times)
0 Members and 1 Guest are viewing this topic.
max
Senior Member
****
Offline Offline

Posts: 269

Thank You
-Given: 1317
-Receive: 43


« on: May 22, 2021, 06:52:27 06:52 »

Hi,

I need a reliable circuit to drive the high power SCRs (300A) gates
connected back to back to control AC phase angle, the line voltage is 380V.
The scr requires min 3V and 200mA gate drive.

Regards
« Last Edit: May 22, 2021, 11:23:51 11:23 by max » Logged

Fate arrived and made the conscious unconscious It silenced the activity of life.
Old_but_Alive
Senior Member
****
Offline Offline

Posts: 300

Thank You
-Given: 485
-Receive: 108


« Reply #1 on: May 22, 2021, 08:26:21 08:26 »

I would check out mosfet gate drivers.

MC34152 from ONSEMI


MICROCHIP have lots of them

https://www.microchip.com/en-us/products/power-management/mosfet-drivers


suggestion, probably a good idea to use an isolated version

try TI Semi

https://www.ti.com/power-management/gate-drivers/isolated-gate-drivers/products.html
Logged

I fought Ohm's Law ...  and the law won
I only use Mosfets because I have a Bipolar mental disorder :-)
digitalmg
Junior Member
**
Offline Offline

Posts: 81

Thank You
-Given: 116
-Receive: 81


« Reply #2 on: May 22, 2021, 05:49:13 17:49 »

This is the control part of the thyristor, in a project I made for an SCR up to 500A at 400V,
 you should preferably add an RC snubber circuit between anode and cathode,
 C - 0,1uF/2000v, R - 47ohm/3W to not exceed dV / dT. For back to back use a
double SCR Trigger Transformer for example  KMB229-311.
« Last Edit: May 22, 2021, 05:55:28 17:55 by digitalmg » Logged
max
Senior Member
****
Offline Offline

Posts: 269

Thank You
-Given: 1317
-Receive: 43


« Reply #3 on: May 23, 2021, 06:35:36 06:35 »

Hi digitalmg,

Thanks for sharing the circuit,
where I can find the  KMB229-311 pulse transformer?

Regards
Logged

Fate arrived and made the conscious unconscious It silenced the activity of life.
bobcat1
Active Member
***
Offline Offline

Posts: 249

Thank You
-Given: 3178
-Receive: 72


« Reply #4 on: May 23, 2021, 07:41:55 07:41 »

HI

Here is a link to the transformer manufacture:

https://www.poweruc.pl/collections/current-voltage-transformer

All the best

Bobi

Logged
digitalmg
Junior Member
**
Offline Offline

Posts: 81

Thank You
-Given: 116
-Receive: 81


« Reply #5 on: May 23, 2021, 10:19:41 10:19 »

I buy from Aliexpress,
www.aliexpress.com/item/1005001580358692.html

but you can use any SCR Trigger Transformer with Frequency range: 1KHz ~ 10KHz

Regards
Logged
mbyka
Junior Member
**
Offline Offline

Posts: 52

Thank You
-Given: 246
-Receive: 36


« Reply #6 on: May 23, 2021, 08:04:47 20:04 »

https://www.pulseelectronics.com/
Logged
max
Senior Member
****
Offline Offline

Posts: 269

Thank You
-Given: 1317
-Receive: 43


« Reply #7 on: May 27, 2021, 12:36:34 12:36 »

Hi digitalmg,

Please advise what changes are required in the circuit for 800A scr, gate input 4.5v 250mA

The  KMB229-311 pulse transformer datasheet says it is suitable for scr with < 500A current.

Regards
Logged

Fate arrived and made the conscious unconscious It silenced the activity of life.
digitalmg
Junior Member
**
Offline Offline

Posts: 81

Thank You
-Given: 116
-Receive: 81


« Reply #8 on: May 27, 2021, 12:52:15 12:52 »

Hi,

Replace the transformer with one designed for 1000A, for example
KMB419-311S.

Regards
Logged
Pages: [1]
Print
Jump to:  


DISCLAIMER
WE DONT HOST ANY ILLEGAL FILES ON THE SERVER
USE CONTACT US TO REPORT ILLEGAL FILES
ADMINISTRATORS CANNOT BE HELD RESPONSIBLE FOR USERS POSTS AND LINKS

... Copyright 2003-2999 Sonsivri.to ...
Powered by SMF 1.1.18 | SMF © 2006-2009, Simple Machines LLC | HarzeM Dilber MC