artem said:
I think the scheme is a bit erroneous? and incomplete .
Nope, it's deffinatly complete as it's being used. Just double checked it.
Suppose the coil should be driven symmetrically - that means Q1's source must be connected to +24 V DC, and place of connection between C6 and C5 to +12VDC
Deffinatly no +24VDC in the system. Is as is.
Assuming complementary mosfets are driven from same source - scheme author supplying swithcing pulses by capasitor to decouple DC part . R6 is used for decoupling of switching pulses on DC and to ensure that Q1 is closed when no pulses are supplied .
the source that provides the pulses is software controlled and uses a non-inverting FET driver. V2 isn't actually a voltage...it represents the pulse train.
D3 is used to limit Q1's Vgs voltage and protect it .
R6 C7 T is aboout 1 millsec , that means freq will be above 1 KHz for sure .
Ok, i follow you here. Indeed the pulse frequency is above 1KHz.
Additionally i think R4 must be tied to D1 D2 connection place and V2 is the source of pulses to coil.
Correct, R4 is tied to D1, D2, and V2 (the source of pulses).
Unfortunatly not
I'm a mechanical engineer and our electrical engineers are out of town. I'm needing to get a handle on this coil driver to address a production problem.
I'm still a bit confused about C5. Seems like it's never really going to charge. Maybe I'm not understanding it correctly?
Also, specifically, what is the function of the two diodes (D1 and D2)?
Thanks,
Tomas