how does this H-bridege works
the problem that i am facing right now is that, i couldnt find the transistor NTE262 and TIP110
also i have attached on the jpg format hope that this wont create any problem viewing.
uncle_sam said:but my mentor told me to use 2 555 timer at the output of the h-bridge and then to connect to the motor.
uncle_sam said:since i dont see any logic behind using the 555 timer at the output.
Styx said:I dont like, you cannot ensure that the two 555 timers are syncronised.
adminidly with this design you cannot get shoot-throughs (be it demanded or switching).
Styx said:If it doesn't use the 555 (a good way to generate PWM) and then via an inverter chip/gate pass the output though the inverter.
You now have a NON-INVERTED and INVERTED PWM, feed these two signals into each input will do the job
Nigel Goodwin said:Using two 555's like that is a complete receipe for disaster! - it's bound to turn all four transistors on at the same time, blowing all four transistors, and possibly causing other damage as well (depending on the supply).
I can't believe anyone would tell you to do it that way!, perhaps you misunderstood?.
Styx said:Yes using two 555 is a very bad idea, but as I stated, this topology is the safest one for it to accedently done two.
The phase-legs are in a PUSH-PULL configuration, thus only one transistor per leg will be on => no problem.