Eldarion and Bruce's build of Bob's Energy Converter

[Motorcoach1]

intrupt the pulces and reinduse them on the third haromic and repet them n the pulse and intrup again. that it does't have gain in the current in ammps . like petto bismole lol and on farts lol , we need even flow of curret with no farts (amps )Ã,  hehehehe  make it  simple volts .(milie amps)  we'er growing them not makeing them !

[MeggerMan]

@BB,
To get this train of pulses with 120 degrees of phase we could have one function generator.
Pulsed into a decade counter with 4 outputs used and the 4th linked to the reset.
1st output = blue
2nd output feed to a flip flop, output = red
3rd output feed to a divide by n set to 4 (or two flip-flops in cascade), output = green

Therefore in relation to the input frequency of f:

blue = f/4
red = f/8
green = f/16

If you need blue to pulse at 35,705 Hz just set f = 148,820 Hz
Red will be 17,852.5 Hz
Green will be 8,926.25 Hz

Simple to setup and scope.

Regards

Rob

[Bob Boyce]

@BB,
To get this train of pulses with 120 degrees of phase we could have one function generator.
Pulsed into a decade counter with 4 outputs used and the 4th linked to the reset.
1st output = blue
2nd output feed to a flip flop, output = red
3rd output feed to a divide by n set to 4 (or two flip-flops in cascade), output = green

Therefore in relation to the input frequency of f:

blue = f/4
red = f/8
green = f/16

If you need blue to pulse at 35,705 Hz just set f = 148,820 Hz
Red will be 17,852.5 Hz
Green will be 8,926.25 Hz

Simple to setup and scope.

Regards

Rob

Quite right, very easy to set up, but not adjustable for slight phase variations between phases. Even assuming that we are able to get our primaries precisely located in exactly the right places, a perfectly balanced 3 phase field rotation is not going to put out much like that. That is where a null in the response is, and minimal output occurs.

If it were a case of just needing simple 3 phase output, then we would just need to drive all 3 primaries with a common 3 phase motor controller. As I am told quite often by those that do not understand the precision phase requirements, I could just buy a 3 phase motor controller chip. When I ask them if a chip like this provides precision phase control, of course the answer is no.

Bob

[eldarion]

Bob,

Thanks for the diagram!  That helps quite a bit.

I should be able to adjust the outputs of my controller to match that pattern exactly.

Eldarion

[MeggerMan]

Hi Bob,
Yes, you quite correct, it's not flexible at all. In fact all you can change is the frequency.

To be able to change the phase will require either a dds chip with 4 outputs with phase adjust or 3 dds chips phase change each one and sync them with a soft reset, which I am not sure if it is possible.
The 4 output chip looks like a go-er but it is expensive, but the nice people at Analogue Devices will send you two samples if you ask nicely.
Phase adjustment using a 4 output DDS AD9959 seems a sensible solution, what are your thoughts?

Regards
Rob