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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.
 

tca785+isolated

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

tca785

tinhthanthep said:
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!
Click to expand...

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

tinhthanthep said:
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!
Click to expand...

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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