How to halt IC TCA785 when overcurrent in the galvanisation

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tinhthanthep

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tca785

I make a galvanisation machine. I use 3 IC TCA785 to control phase for bridge rectifier 6 thyristors. I want halt the machine when overcurrent. The machine will be reset after turn off and adjust volume back to 0 position. could anyone help me the schematic?
Thanks very much!
 

tca 785

the best solution is:
use one of Hall effect current sensor "LEM" to measure DC current in isolated.
place a low pass filter (RC) and compare it,then you can disable TCA785 in Inhabit pin or using a Integrator + comparator + Reset Relay to down Control Voltage of TCA785.
i Used this solution in DC motor Control.
 

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tca785 schematic

this is simplest form of my solution.
use must adapt it with your circuit.
 

how to galvanisation

Here is my schematic. What do you think about it? Is it correct?
Thanks!
 
tca785+isolated

Here is modified schematic. What do you think about it?
 

tca785


can you send me the chematic diagram for 3 IC TCA785 to control phase for bridge rectifier 6 thyristors.
 

ic (tca785)

Hi gujs !

Maybe the datasheet of TCA 785 will help you.
 

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Re: tca785


Can any one send me 3 IC TCA 785 ..6 scr control cct or nay type of 3 ph control cct ..
send me to this forum or tnp.de.silva@gmail.com
Thanx
TNP
 

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