I have a bipolar motor, and software written for PIC 12F508 to drive unipolar motor.
Is the schematic in attachment correct for this purpose?
Coil A1, CoilA2, Coil B1, CoilB2 are the lines form PIC, while A1, A2, B1, B2 are the actual motor connections.
Integrated drivers are OK for small power motors. But, in general, is my idea of bridge OK? With it I could drive more powerful motors. I have a large unipolar motor, but to incre4ase torque, i think of using it in bipolar mode (central tap left unconnected).
Any suggestion?
Has anyone a design using low rdson power MOSFET?
No, as I managed to destroy the shaft of the motor, I halted on that for a moment. When I acquire another motor of the appropriate size, I'll continue with the development. As I'm currently involved in another project, this will be done in one week from now.
The bridge for a more powerful motor is weeks ahead.
These circuits are poorly designed, and certain to let the smoke out. In the top circuit, if the inputs are left open all the transistors will be on at once. BANG! The bottom circuit has the same problem, and also lacks base resistors for the lower trannies.