have spent a good while trying online trying to find a direct answer to the 2 below

which one of the following types of motor can use ac or dc
single phase universal
single phase split phase
dc series
dc brushless

a suitable type of motor to drive a 20kw load at almost a constant speed is a
3 phase induction
single phase
dc series
dc brushless

if anyone has any charts or good links that can help also would be appreciated.tks

 

have spent a good while trying online trying to find a direct answer to the 2 below

Well it took me 0.3 seconds to find the following on google

https://www.google.co.uk/search?hl=.....1ac.1.34.heirloom-hp..0.13.1109.nGeA_hgFHVA

As to the second question what do you think?
What information are you given in the question that might be important?

 

thanks for reply.
that article doesnt mention single or split phase so im none the wiser

the second one id say is dc

 

Firstly welcome to AAC

Have you read this thread about homework help?

http://forum.allaboutcircuits.com/showthread.php?t=3002

I would add to this always read the question carefully.

1) Why do you think two types are called DC motors?
My google search has writ large in the first entry an answer to this one.
If you think they wanted you to check every motor type then have you googled the rest? Formally checking ech type in turn will inform you about each type. Is that not a good thing?

2) I also asked for your reason.
What are the powers of typical electric motors you have come across?
How does that compare with the one in the question?
What sort of power supply does that mean it needs, would it, for instance run off batteries?

 

direct current