Can any electric motor gurus help with a wiring question?
Hi all,
I have a half horse single phase clutch motor (ex sewing machine) that I'd like to use and I am trying to sort out the wiring.
Ho Hsing Machinery Co, Taiwan. Type STK-3. 4 Pole.
It's wired with a five-core, double insulated main cable and a figure 8 (dual wire) cable as well. A single, 6 uF cap is also present.
White and grey of the main cable have 6.2 ohms between them, while the cap is wired in series with 30 ohms across the red and black conductors. The fifth conductor is earth.
The figure 8 cable has no marking to differentiate one conductor from the other and a 0 ohm short exists between the conductors. The conductor diameter is identical to the main cable at ~1.2 mm.
Disassembly reveals a squirrel cage rotor. There was no apparent centrifugal switch (is it likely to be buried inside the rotor?), so I'm not sure how to treat it. With a single capacitor, I'm guessing it is more likely to be cap-start (start winding different gauge and number of turns to run winding) than permanently split (identical gauge and number of turns) as there are two different resistance values...
I have been tempted to just connect the R and series RC neworks in parallel to 240 v A + N and see what happens, but since I didnt find a cut-out switch, I'm a bit concerned about burning out the start winding.
Any suggestions?
Cheers,
Mick