Single phase motor type detection

Question

Single phase motor type detection

Ali-rashid (Electrical)

(OP)

3 Dec 17 08:17

We have a single phase motor. we also have a vfd which supports PSC( permanent splitted capacitor) and single phase Shaded pole motors. The pictures of the motor plate and the capacitor on it are attached.
Is this motor categorized in any of the supported types, i.e. PSC or shaded pole? How can I detect single phase motor types?
Thanks in advance

jraef (Electrical) · Answer 1 · 2017-12-04 08:23:32

The best way to tell is to open the end bell and see if there is a centrifugal switch. If there is, it's not PSC. If there isn't, it likely is, although it could possibly use an external potential relay.

" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden

ashtree (Bioengineer) · Answer 2 · 2017-12-04 09:49:38

Use Google to see if you can find the motor specs based on the name plate data?

Regards
Ashtree
"Any water can be made potable if you filter it through enough money"

jraef (Electrical) · Answer 3 · 2017-12-04 15:39:06

To ashtree's point:
http://www.gefeg-neckar.de/fileadmin/user_upload/D...
Yours is the EG71 diagram. Nothing says for sure, but that diagram appears to indicate that it is PSC; no start switch and the cap is in series with one winding.

" We are all here on earth to help others; what on earth the others are here for I don't know." -- W. H. Auden

ScottyUK (Electrical) · Answer 4 · 2017-12-04 17:41:39

The relatively small capacitance value and the MKP dielectric type code suggest it's a run capacitor, so another vote for it being a PSC motor.

ScottyUK (Electrical) · Answer 5 · 2017-12-04 18:25:34

A more definitive answer - certainly looks like a PSC type.

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Single phase motor type detection