Help with diagram

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Bjartur

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Can somebody make me a single line diagram of one phase to three phase frequency control and all the things I need for it. It will connect to three phase motor.
This is for a school project and I’m having hard time putting it together.
 

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One clock signal to three D flip-flops configured to output 3-phase signals.

The clock signal can be any frequency. Each motor gets 50 percent duty cycle, staggered 120 degrees apart. The sequence travels in the order 3-2-1.



Link below runs my schematic in Falstad's animated interactive simulator:
To change clock frequency, mouse over clock, right-click, select Edit.

tinyurl.com/282tmors
 

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Sorry I’m meaning I have a frequency control that is one phase to three phase and then I have a relay, start/stop, speed control, contactor, emergency stop, foot pedal, overload and a motor and I need to put that all in a diagram and show connections and please let me know if there is anything more i need in this to make it work. This is going to be rotary welding table with adjustable speed for welding metals.
 

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it´s just a simple internet search ...

It´s done million times before. Everything is available. For free. Because the semiconductor manufacturers want to help you use their parts.
They have documents for every thing. Simultions, datasheets, design notes, simulation ... even videos.

* Show what you have done so far.
* Tell us where you see the difficulties.
* post links to documents ..and tell us what is unclear

Klaus
 

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Commercial specs are for a large disc rotating 1 to 12 rpm. I guess the foot switch makes it start & stop. Do you decide what is the power supply? Your controls can be put in series for the most part. It's a question of whether an item should be installed on the single-phase side or else the 3-phase side. This project can bring various levels of difficulty. Motors are usually built to run at 1800 rpm or so. With effort you can provide PWM electronically or else gear down its speed mechanically. Volt levels are going to figure into this too.
 

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