2HSS86H Driver... AC or DC PSU?

[Clive S]

Ok, thanks but i don’t get where I’m wrong, could you please explain?

As i see it i have the choice to run them with AC and a PSU consisting of only a thoridal transformer.

The other alternative would be DC and a PSU with transformer, rectifer and caps.
The motors have 1,8 mH inductance so I figured a 48V PSU would be sufficient to get speed and reduce heat and back EMF.

Heres Another schematic where it says AC or DC as Power supply!?

Ok when I said you had it wrong I was referring to "My drivers (JMC 2HSS86H) can be run with 24-70V DC or 30-100V AC" you have the DC and AC transposed .

You indicated that you would be leaning towards DC.

You can have either a transformer with caps and a rectifier OR just a transformer.

Forget about the back EMF the caps take care of that ( there are caps in the driver as well) The heat is what you set the current to on the drive.

If you want speed for wood routing then a higher voltage PS is beneficial. I would go with 70V DC but your choice.

[JW1977]

Ok, got it!
I´m gonna take your advice regarding the PSU and build a DC one with higher Voltage.
Thanks!

[Clive S]

Ok, got it!
I´m gonna take your advice regarding the PSU and build a DC one with higher Voltage.
Thanks!

Ok don't worry about asking questions its cheaper than getting it wrong. Check out Joe's vid its a good guide.

This is a good place for a one stop shop https://www.rapidonline.com

[JW1977]

Ok, thanks!

[JW1977]

Hi!

I’m about to get the remaining parts that I need for the PSU and I would need some input.
Here is what I got so far.

Toroidal transformer, 2x36V, 800 VA. I intend to wire the secondary in parallel to get about 48V rectified.
A cap rated 80V, 27000 uF.

Looking at a rectifier rated at 600V 35A. I learned that the rectifier values should exceed the actual values.
My steppers are rated at 5 amps max and there’s 4 of them. Is it a problem choosing a rectifier that exceed the actual Volts to much?

Do I need a bleed resistor over the cap? If so, any recommendations of the proper value of the resistor?

Any recommendations regarding fuses? Type, value and so on?
I don’t know what they are called in English but I have seen like a flip fuse mounted on a din rail beside the PSU.

Volt readouts?

Would appreciate some input and input in general here, thanks!