Recent content by yshtar

It's a run cap, I think, since I saw no arm at all. I just got this and need help to understand it. Start cap: C = 350000 * I/2p * f * U * cosφ where: I — current; f — frequency; U — voltage; 2p — Take 2 big power factor, power factor Minor 4; cosφ — power factor (0.4 ~ 0.8)...

I haven't got the 125w's capacitance, but the 300w's is 30uF, 220AC. I just tried to calculate the 125 watts PFC with 0.8 power factor and the result is 4.9uF (a little over what Giordanus said, 4.7uF) , and considering that the 300 watts motor had 30uF, 4.9uF is way much smaller, so it's not...

I'll remember that. Thanks.:) Btw, does put 2 capacitors in series add its capacitance? 20uF + 30uF = 50uF ? I'm thinking of doing it if I can't get a capacitor with big enough capacitance.

Did you mean that the higher the voltage, the longer it can work?

I don't know the capacitance. I haven't taken the pump out. It's in the well. I didn't look at the capacitance since I didn't know it was the important thing. I thought it was the voltage that was important, and it's 370V.

I assume you talked about the resistance of the wire, the Ohm...? I don't know if it's start/run/compensate capacitor.Both the motors run, but not as fast as before. My guess is that the capacitors had an expiry date as they have the year on them.. We changed the capacitor several times...

Yes, they use AC power. 220 volts. I'm not sure if I can' get the manufacturer's data on this. I"m in Indonesia and they don't publish such thing. Besides the 300 watt one is about 30 years old, and the 125watt is about 20 years old. And I don't know how to measure the inductance, and the RMS...

I don't understand that, I'm afraid. I have read that the start capacitor is to boost the speed and stop at a later time, but I haven't known about the other function of capacitor you mentioned. And I don't know how to determine the function of the capacitors on my water pumps. In fact, it's...

I'm trying to get the correct capacitor for my 2 water pumps. One is 125watt and the other is 300watt, and both run at 220v. I don't know if it's the start or run capacitor, btw. I'm getting that since: 1F = 1C / V, and 1J = 1C / V, and 1W = 1J / second, that 1F = 1W. So the capacitor...

I think everyone had bad moments the first time. The first time I used the common sealer, but it was not heat resistant. It melted when the machine was hot. I had to clean the inside. lol. I replaced the wire and used epoxy adhesives and it lasts until now.:)

Yes, maybe it was a multiphase system, I'm not sure. A two or three phase system, maybe.I know nothing about it. About canceling each other, I think it was what happened with the first guy because he wound all three in the same direction, such as left, left, and left. The power flowed in the...

Sorry I'm late. I felt tired thinking of the bike yesterday. lol And it's ok to ask, at least for me. :) Probably all the motorcycle here uses that kind of rectifier, no matter what the make is. I know it's a half wave rectifier from the single input and output, since the bridge and center...

Sorry I forgot it again. I have 8 windows opened here. lol. The wire, I had a book that mentioned the amp one gauge (size) of wire produced. It was a junior high book, I think. I bought it when I decided to wind the coil myself. It was done twice by other people three times. The first got...

lol. I really did pile as much as I could. lol. And I had to alter the windings a bit. There were 4 in there, one for the spark plug, and the other 3 for the lights and battery. But 3 windings of that 1.1mm wire killed several 100 watt bulbs, and after I paralleled several bulbs totaling 160...

Sorry I forgot it. "I remember having a BSA Bantam (150cc) in 1966 (it was ancient when I bought it too) and the battery terminals became disconnected and the sidelight / backlight filaments all burned out as the volts soared way above the required 6V." It happened if the battery was...