Design a lock rotor protection circuit for high voltage high current DC motor

Thnak you for your reply. However, I want to build a external PCBA for it as I don't want to use such large size stuff!!!

I want to use a voltage comparator to do something. But it is in low voltage components. How can I convert such 240Vac to 12Vdc voltage to drive the IC and triggering the IGBT for output controlling?

I think transformer that are not suitable for my application. Use resistor series?

Do *not* waste time on it: It has already been done and done well!

The standard device is a "Motor Protection Relay", they are cheaper than you can buy the components for - and there is much more to the story than mere current for which a fuse would suffice; the current over time, the phase realationship and the heat capacity of the motor is factored in too.

and (yikes!):

and:

Hell, isn't that called a 6A circuit breaker?

use

then use a fuse... trying to rememebr the term for motor slow blow ones.

yup, dont need any of that with a fuse tho. Or if you want it resettable, a polywhatnot fuse. Or a cheap thermal mcb.

NT

One of Allegros hall effect Current Sensors?

Robert