[DingbatCA]

Is it possible to drive a cheap spindle from Ebay (High Speed 1 5KW Water Cooled Spindle Motor for CNC Router Engraving Milling | eBay) using a DC brushless speed controller (http://castlecreations.com/products/...ice2-hv.html)?

I have a power supply big enough (48V, 50A) and the Phoenix Ice2
HV 40 ESC.

[Al_The_Man]

I doubt it, the one listed is an induction motor, the RC is usually P.M. type, (the link does not work)!
Al.

[Bubba]

Don't think it will work. The spec on the unit is:

Voltage: AC220V
Frequency: 0-400 Hz

Long way from your 48 V supply!

[DingbatCA]

http://castlecreations.com/products/...ice2-hv.html

I am not worried about the power difference. 220V to 48V. In this case it is all about watts.

[DingbatCA]

How do you tell if a spindle is induction or permanent magnets?

[underthetire]

http://castlecreations.com/products/...ice2-hv.html

I am not worried about the power difference. 220V to 48V. In this case it is all about watts.

Can't get RPM without volts....

[DingbatCA]

I can get 60,000RPM on brushless motors at 11.1V. Not sure how volts would tie to RPM in that manner.

That stated, not getting enough amps into the coils because I am running at to low a voltage, ya, that will cause the motor to run slow. RC motors get around this by using a short length of large gauge wire.

I am trying to find a good picture inside a spindle. If it uses permanent magnets then I could try this safely. But if those cheap spindles are induction based, then all I am going to do is turn my speed controller into a very expensive fire work.

[Bubba]

It all about rpm/volt (Kt if I remember correctly) whether it is your rc motor or the suggested spindle. If you don't achieve design volts, it won't turn that fast (period).

[underthetire]

I know all about RC brushless, have 30+ of them.

If the spindle is not wound for low voltage, IE 11.4V, you dont have enough volts to energize the coils. Period. Why do you think RC motors are NOT listed by volts as much as KV ? Thats the speed of the motor ie motor windings.

[Al_The_Man]

How do you tell if a spindle is induction or permanent magnets?

If you have the motor, one sure way is to short the stator wires and try and spin the rotor, if PM there will be high resistance, if induction, none.
Al.

[neilw20]

How many wires on the motor?

[DingbatCA]

I do not have one of these spindles to play with, yet.

They have 3~4 wires, depending on what version. The 4th wire is case ground.
"Power connector: GX16 water proof (1,2,3,4) = (U,V,W) where 4 = Ground"

Any one out there have one of the cheap spindles off ebay? Can you check if it is induction or permanent magnets?

[Al_The_Man]

The one you show in the link is a 2 pole AC induction motor, on those R.O.C. ones, you need to check the 4th pin (GND) many have found the wire is on the connector but is not connected to ground internally due to a wiring error.
Normally driven with a VFD.
Al.

[DingbatCA]

Some times it just takes a good article to explain the differences:
Variable-frequency drive - Wikipedia, the free encyclopedia

So, no to my original question. If the motor is driven by a VFD it is a 3 phase induction motor, NOT a permanent magnet motor. Regardless of power/voltage, a DC brushless speed controller can not drive an induction motor.

[Al_The_Man]

Also I have attempted to drive a BLDC motor from a VFD, the results were less than stellar!.
Al.