Simulate three phase zero crossing

[See_mos]

Advice please.
What is the best way to generate three phase zero crossing pulses in order to test some micro controller code?

I need to vary the frequency so I do not think using three signal generators with delayed start will work.

I tried using the pattern generator to generate a 1-3-5 pattern but it is so long since I used it that I haven't been able to get the timing right.

[See_mos]

Of course that should be a 1-2-4 sequence so only one bit pulses in turn.

[See_mos]

3PH generator.GIF (69.86 KiB) Viewed 655 times

I found a workaround suitable for my requirements.

Using the signal generator driving a 4017 counter, 3 NAND gates and a 40106 Schmidt inverter as per attached.

[Ettore]

You've beaten me this time, however my version is attached here.
All digital primitives are in the Modelling Primitives category.

[See_mos]

Hi Ettore,
Your solution is neat and would probably use less processor time.
I will give it a try
Thanks

[See_mos]

I don't usually use the primitives. Can you tell me please what parameters I need to change?

I tried downloading the project but get an MSVCR90.DLL access violation.

[Ettore]

Maybe you are working with very old Proteus version.
The properties are:

U1:
Initial Output Value=1

U2,U3 & U4:
Pulse Width = <PULSE>
type INVERT=CLK,RESET in Other Properties field.

[See_mos]

Thanks Ettore

Yes, my versions are 7.10 and 8.0 Beta, my subscription expired 8 years ago.

I recently sent an Email to sales about a possible upgrade but still waiting for a reply.