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Author Topic: 3 phase motor inverter  (Read 2467 times)

3 phase motor inverter
on: October 15, 2014, 14:31:05 PM
Simple question.  If i have an inverter that takes a 3 supply phase input.  Can i connect the output motor in delta?
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Re: 3 phase motor inverter
Reply #1 on: October 15, 2014, 19:38:45 PM
yes :-)

just connect it, and it'll work :-)
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Re: 3 phase motor inverter
Reply #2 on: October 15, 2014, 19:42:08 PM
Wowser.. That takes me back. Power engineering on my ONC. Was it Star for the other type?
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Re: 3 phase motor inverter
Reply #3 on: October 15, 2014, 20:01:49 PM
Should be Star ideally with a 3-Phase input on the inverter.

Motor dependant obviously, smaller motors are normally Delta for single phase input inverters, Star for 3-phase input inverters.

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Re: 3 phase motor inverter
Reply #4 on: October 15, 2014, 20:51:02 PM
Yeh i use both 1ph and 3ph input inverters. 1ph always delta i know that. But was unsure about 3ph as although i have only ever seen them connected in star. Someone recently suggested connecting a 3ph input in delta. And why not it seems. Thanks
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Re: 3 phase motor inverter
Reply #5 on: October 15, 2014, 22:18:25 PM
Because it is wrong in theory ;) Unless it's a large motor, and then it should be.
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Re: 3 phase motor inverter
Reply #6 on: October 15, 2014, 22:25:02 PM
Why exactly is it wrong in theory? I can have a guess but its tricky to find a good explination as to why it is wrong.
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Re: 3 phase motor inverter
Reply #7 on: October 15, 2014, 23:33:16 PM
No idea on any of this, googling to find out what everyone is talking about!

Does this help?

http://www.answers.com/Q/Should_a_3_phase_motor_run_on_star_or_delta
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  • Offline bear

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Re: 3 phase motor inverter
Reply #8 on: October 16, 2014, 10:13:34 AM
The link XEnitys post explains it very well.

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