Hi everyone, i have designed 2kW full bridge for my friend. He wanted me to design 2kW full bridge having +- 70V output. I have some issues as below;
1) How can i bypass NTC thermistor via optocoupler and triac with timing circuit. For example, it needs to bypass thermistor after couple of seconds due to power dissipation problem.
2) I need to add undervoltage inhibit for my UC3825 but i dont know how to do it. For example, i need to shut output down in case of low AC input voltage like 180VAC.
3) Do i really need to add speed controlled fan for cooling ?
If you can check my circuit completely and say my faults, it will be very helpful for me =)
Thnx.
1) How can i bypass NTC thermistor via optocoupler and triac with timing circuit. For example, it needs to bypass thermistor after couple of seconds due to power dissipation problem.
2) I need to add undervoltage inhibit for my UC3825 but i dont know how to do it. For example, i need to shut output down in case of low AC input voltage like 180VAC.
3) Do i really need to add speed controlled fan for cooling ?
If you can check my circuit completely and say my faults, it will be very helpful for me =)
Thnx.
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