Electronics > Projects, Designs, and Technical Stuff
Dynamic Braking with minimal components [SOLVED]
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james_s:
I have an older cordless electric lawnmower that originally used a bundle of 18AWG wire as a braking resistor, connected across the motor by a mechanical switch that controls power to the motor.
anishkgt:
I have seen this feature on my cordless Dremel. I have the pcb out will post some pic of it.


Www.Georgehobby.wordpress.com

Equipments: DSO104z, Hakko FX888D, Brymen BM869s

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T3sl4co1l:

--- Quote from: anishkgt on January 02, 2019, 07:33:41 am ---https://forum.allaboutcircuits.com/attachments/img_1820-jpg.166948/
with the best of my knowledge i guess this is the schematic
https://forum.allaboutcircuits.com/attachments/capture-png.166949/
Looks like the FET is just a switch and the dual diodes are just blocking the back emf from the motor but where is brake part of the circuit.

Here is the remaining PCB in the dremel
https://forum.allaboutcircuits.com/attachments/img_1823-jpg.166945/  https://forum.allaboutcircuits.com/attachments/img_1824-jpg.166946/

--- End quote ---

You can't link images from another forum...

Tim
anishkgt:
It is the same one that I had done. I don’t have the pics in my work desktop.


Www.Georgehobby.wordpress.com

Equipments: DSO104z, Hakko FX888D, Brymen BM869s

Sent from my iPhone using Tapatalk
anishkgt:
Here are some pics from my Dremel

The schematic is reverse engineered, i think i've got it correctly.
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