solid state circuit breaker for dc

[ravit245]

HI ,

I want to model solid state circuit breaker for dc.
Please provide me some reference for this model.


Thanks
ravi

 

[mtwieg]

I don't think I've ever heard of a DC breaker. Are you sure you're not talking about a crowbar circuit?

 

[FvM]

I'm not aware of any products of this kind. DC overcurrent limiting circuits with shutdown function can be often found in power supply circuits.

 

[tanveerriaz]

overcurrent limiting circuits use in chin powersupply

 

[ravit245]

thanks for ur circuit tanveerriaz
if u have some material please provide the ref

Regards
ravi

 

[mtwieg]

Just so you know, a current limiting circuit and a breaker are two completely different devices. A breaker is a switch that actually disconnects the load from the source after a fault condition. A current limit does not, and requires a voltage drop in your source. Do you need actual breaker functionality or do you only need a current limit?

 

[ravit245]

i need circuit breaker circuit only

 

[goldsmith]

Dear ravit245
Hi
breaker circuits are easy to design , and no problem with them , but how much is your power and voltage and your current ? and where is your circuit ? and where is the place that you want control ? ( which section )
Best Wishes
Goldsmith

 

[Tahmid]

You can use a switch such as MOSFET or BJT. Then, you need a means of sensing the current. A shunt can be used. But a hall-effect sensor would be more accurate. The circuit could be powered off the input voltage and the MOSFET/BJT/switch turned off when current exceeds a certain limit. You can use a microcontroller for this, or even a simple comparator circuit. You can use the MOSFET in low-side configuration to avoid hassle related to high-side switching.

Hope this helps.
Tahmid.