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How to Know If Your Power Supply Output DC or AC Voltage Leave a comment

Sometimes we get complaints from synchronous AC motor users that their’s motor does not work. We can not find the proper reason until we got a picture of her or his power source.

We all know that “+” is positive, “-” is negative. Power source like the pictures below has defined DC clearly.

But the many kinds of power does not make “DC” or “+” “-”, see below

They have same symbols — and — Let see what is Wikimedia say “An example of the Direct Current symbol”.

And they also have symbol + and -, which distinguish positive and negative of the DC plug.

So, all of the power sources which has symbol above should output DC(Directly Current), which will not suit the TYC-40 or 30 synchronous motors.

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