Sanyo Denki P5 motor pinout

[walter]

Darik,

This power supply came from Ebay guy johnango. You can use it on 220v; toroid is 30lbs, I measured 156vdc on the drive. Check him out, you can buy parts and make your own (vs $300 assembled).

btw, these drives are sweet!
_

[Xerxes]

Walter, that must be the cleanest design DIY control box that I've seen so far Really nice work.

I noticed that there are some bent power stage pins in the middle drive, check that pins are not touching each other before powering up.
Clean compressed air might also be good idea for removing any metal chips that might have come from drilling.

[walter]

Good catch, thanks!

[darik]

Walter,

What is the VA rating of the PSU you are using?
I've checked johnango's site (http://www.toroid-transformer.com/) and his power supply's go up to 1500 VA. I'm planning to add a 4th axis later so if I reserve 500W for a motor I'll need 2000W. From VSD-A data sheet I've estimated that I'll need at least 3kVA to run safe 4 motors. Is that right or I can go with 2kVA one?
Also did you measured any voltage drops under load?

@ Xerxes,

I'm a bit confused with the power supply voltage calculations after I saw Walter's PSU voltage rating. How is the calculation for an AC motor done? Those Sanyo's are rated at 100VAC.

1. Should I calculate DC or AC voltage at the motor?

100VDC needed/88% effective voltage swing ≈ 114VDC at the drive?
or
100VAC needed/88%*1.41=160VDC at the drive?
Can you give an example?

2. Is there any breakout board you can recommend? Could also be DIY one.

[Xerxes]

Darik, the VSD-A datasheet is very rough about power supplies and talks about worst case load. In practice you probably need a fraction of the worst case power. I hope Walter would publish some real world power consumption data after he has his machine running I would bet it to consume less than 800W power in average.

Sizing PSU for servomotors is not exact math. Even voltage requirement can be difficult to estimate. For instance I have 300W and 1000W sanyo P5 servos which both are 100VAC and 3000 rpm but the 1kW model seems to need nearly 200VDC to run at full speed while 300W runs happily at 150VDC. There shouldn't have been any difference but there is because motor voltage ratings seem to be very loosely specified.

The latter of your equations gives a quite good voltage estimate.

[walter]

Darik, it's 1.5KVA, 170Vdc 9A cont.

Xerxes, I'll post something as soon as I can get it going. Appreciate all the help and info here on these threads- good job guys!