Wiring help single phase AC servo
08 Nov 2019 14:28 #149917
by jools
Wiring help single phase AC servo was created by jools
Hi All
I've bought a Chinese AC servo and the translated instructions are a bit baffling when it comes to wiring it to mains power; in the manual there is no explanation of where the -ve 240v is connected to. I have L1, L2, L3 connectors for three phase and it says use L1 and L2 for single phase. What it doesn't say I how to connect +ve and -ve to these andif indeed -ve is even meant to be connected there.
Has anyone got the answer to this Chinese riddle?
Jools
I've bought a Chinese AC servo and the translated instructions are a bit baffling when it comes to wiring it to mains power; in the manual there is no explanation of where the -ve 240v is connected to. I have L1, L2, L3 connectors for three phase and it says use L1 and L2 for single phase. What it doesn't say I how to connect +ve and -ve to these andif indeed -ve is even meant to be connected there.
Has anyone got the answer to this Chinese riddle?
Jools
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- tommylight
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08 Nov 2019 15:25 #149922
by tommylight
Replied by tommylight on topic Wiring help single phase AC servo
Symbols? Signs? Schematics?
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- Todd Zuercher
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08 Nov 2019 16:36 #149926
by Todd Zuercher
Replied by Todd Zuercher on topic Wiring help single phase AC servo
What is confusing? Single phase AC power doesn't have + or -, it is one of 2 options, opposite polarity (L1, L2) or a hot and neutral. I'm not familiar with calling it +ve and -ve, but if that is your single phase power source, you'd connect one to L1 and the other to L2, and it shouldn't really matter which one goes where.
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09 Nov 2019 01:01 #149952
by andypugh
It's AC so doesn't matter. Connect Live to L1 and Neutral to L2. (or vice-versa, if that is more convenient).
The supply goes straight in to a rectifier, so the drive can't even tell which way you wired it. In fact L1 + L3 or L2 + L3 in any combination would probably work too.
Replied by andypugh on topic Wiring help single phase AC servo
I have L1, L2, L3 connectors for three phase and it says use L1 and L2 for single phase. What it doesn't say I how to connect +ve and -ve to these andif indeed -ve is even meant to be connected there.
It's AC so doesn't matter. Connect Live to L1 and Neutral to L2. (or vice-versa, if that is more convenient).
The supply goes straight in to a rectifier, so the drive can't even tell which way you wired it. In fact L1 + L3 or L2 + L3 in any combination would probably work too.
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09 Nov 2019 01:44 #149956
by tommylight
Replied by tommylight on topic Wiring help single phase AC servo
That +VE and -VE might be for a DC power supply, in which case it is not needed.
Some 3 phase drives do need one of the phases (usually 220V) wired to 2 other terminals, besides 3 phases. Yaskawa older ones need that.
Some 3 phase drives do need one of the phases (usually 220V) wired to 2 other terminals, besides 3 phases. Yaskawa older ones need that.
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11 Nov 2019 19:57 #150152
by jools
Replied by jools on topic Wiring help single phase AC servo
Cool thanks guys.
It's my lack of knowledge calling them +ve and -Ve, thought that was standard electronics.
I got confused with it not specifying live to this terminal and neutral to an other...
Cheers
Jools
It's my lack of knowledge calling them +ve and -Ve, thought that was standard electronics.
I got confused with it not specifying live to this terminal and neutral to an other...
Cheers
Jools
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