Hi.i am making a swicht for making motor rotate in CCW AND CW direction .
CAn anyone tell me where to use those flyback diode ,without causing any problems in rotating in either directions .
DC motor specs 12v 1A.
i am worried that the diode might short something if not used correctly .
If you have a reversing DC motor, you cannot add a simple flyback diode across the motor terminals.
You can add a MOV or a Bidirectional transorb across the motor terminals.
You can see in circuit D3 the reversing DC motor with its flyback diodes installed, i.e. 4 diodes.
Your DPDT switch N.O./N.C. will replace the A and B contacts in the circuit.
Circuit G3 use a MOV and a capacitor.
larryd:
You can add a MOV or a Bidirectional transorb across the motor terminals.Circuit G3 use a MOV and a capacitor.
What are MOV or a Bidirectional transorb ?
Is Bidirectional transorb that diode arrangement shown ?
Circuit D3 shows simple silicon diodes, ex: 1N4007.
This circuit should suffice.
You can Google MOV (metal oxide varistor) and Transorb (transient-voltage-suppression (TVS) diode).
No diodes needed if you just use a switch.
If electronics are involved, then use a small bridge rectifier.
Connect the two AC terminals to the motor, and the + and - terminals to +supply and ground.
Leo..
Wawa:
No diodes needed if you just use a switch.
so i can skip thse diodes?
If no electronics is powered i.e. just the motor, there really is no need for the diodes.
There will be arcing on the switch contacts though.
larryd:
If no electronics is powered i.e. just the motor, there really is no need for the diodes.
ok
Any MODS of forum . please mark this as solved then , as i have got my answer
You can mark it a solved yourself by adding [SOLVED] in front of the title of your original post.
[SOLVED] How to use flyback diode for motors
Leo..
