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Thank you thats what I thought too until I until I test it with a scope and see that there's some negative current at the braking time but in both the coils (even the second one connected to the neutral(yeah sorry neutral not ground)). I don't understand how and where this current is coming from...

Sorry but in the diagram, both the capacitors in derivation with the diodes are varistors then just protections.

Thank you for the answers @blacksea: It's an universal motor (8.5A,230VAC,1500W). It's kind of experimental then when I will understand how it work I will increase the value really carefully. @BrianE22: If it's the braking resistor then I don't know how it brake the circuit(it's a big resistor...

Thanks for the answer ;) I want first to fully understand this scheme (role of the MOSFET and the thyristor, how the current is getting in the motor maybe with the capacitor) and then compute it from the drill and increase it but not much.

Hi I finally found a way to brake dynamically a drilland i found it on a circular saw. I've drawn the electrical scheme of its brake which work with the drill. The problem is that I want to resize the componant to make it brake faster. But I dont fully understand of this brake work. So can...

Thank you guys for your replies! I have found a way to slow down and then cut the motor. It's a patent made in 1972 (then not yesterday). It's just the first step because the guy used two switches (on,off) and put one RC and the stator in parallel and followed by a rectifier which work only...

@OperaHouse: Ah ok i see, but its a 2 wires, a drill. But I still think that I can put an electronic system. Oh sorry I have to rectify the normal intensity is about 8.5A and not 16 for a power of 1500W.

Could the switches be replaced by an electronical component like transistor to have an totally autonomous system ?

Thank you for your answers! @BrianE22:I've already seen some but I found it to easy or maybe too schematic. @Jraef:thanks for this one. It's a really good one with patent which is curious because the circuit looks pretty easy. But I just have a doubt about the field coil. Is it representing...

Hello everybody! I have a question which could seems easy for some but which gives me hard times. I want to know how to slow down then cut the supply of an universal motor (230VAC, 16A) and all of that electronically because this system will be in a tool and will be activated by an...