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reduced voltage motor controller.

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alphacat

New Member
Hey guys,
I found this schematic of reduced voltage motor controller, for 3-phase motor.

Could this circuit work for 1 phase motor?

Thank you.

PDF file attached.

 

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tcmtech

Banned
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I dont see why not. single phase is just 1/3 of three phase. Just use one of the output circuit Assemblies.
Due to the higher inrush current single phase motors have design the power handling circuit to support at least 10K the average motor running current.
 

alphacat

New Member
Thanks, that is very cheering :)

--
I noticed that neither in the schematic, nor in the attached app. note, there are values of the drawn components.
Is it common that a schematic is given with no componetns values?
I wonder, how should i know what value of resistors, capacitors, etc. to select?
 
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tcmtech

Banned
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What typically happens is over the several dozen copies of the original it was handled by one or more people with no electronics knowledge that have no idea what the values sheet is and thusly deleted it.
The description and diagram stay mostly intact but the components values reference gets lost. You pretty much out of luck without it.

If you have ever read those alternative energy secrets reveled or like books or reference sites they are also full of incomplete schematics, schematics without descriptions, schematics without part value references, and incomplete or inaccurate descriptive text.

I get the impression this likely came from one of them.
 

crutschow

Well-Known Member
Most Helpful Member
The document you attached is for a patent. Patents generally just show a general design approach to perform some function. Thus it's not unusual that the schematic has no values. If you want the values, you'll likely have to calculate them yourself.
 
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