240v single phase to 415v 3 phase conversion

[BobL]

Hi Bob,
And you say the removing 240V supply from the VSD stops the spindle faster? Maybe there is a "brake if supply is lost" option on your VSD? Do you have your VSD on "Coasting stop" or "decelerating stop"? If on decelerating stop, how long is the ramp time?

For normal off operation I have it coasting until it reaches 30Hz and then it's on decelerating stop. On supply loss it seems to stop even faster.

[Oldneweng]

For normal off operation I have it coasting until it reaches 30Hz and then it's on decelerating stop. On supply loss it seems to stop even faster.

First we are going to need proper stop watch timing to check the differences between the 2, then we are going to need to find out why this is so.

Dean

[Stustoys]

Hi Dean,
There are some big capacitors in there. I believe but havent tested they can run the motor for a short time with the power off(dependant on load I guess). I'm not exactly sure how the braking works, something to do with feeding DC to the motor, so cant really comment

Hi Bob,

"coasting until it reaches 30Hz" Havent heard of that before, only decelerating then braking. Neather of my VSD can start braking until 10Hz.

Stuart

[BobL]

Hi Bob,

"coasting until it reaches 30Hz" Havent heard of that before, only decelerating then braking. Neather of my VSD can start braking until 10Hz.

Stuart

Hi Stu,

I can set the frequency at which it starts braking and then set the rate of braking (Up to a point).

[Stustoys]

Hi Bob,
Does it have a max Freq you can set the braking?
The max Freq you can start braking on the Teco and Huanyang is 10Hz

Stuart

[BobL]

Hi Bob,
Does it have a max Freq you can set the braking?
The max Freq you can start braking on the Teco and Huanyang is 10Hz

Stuart

I will see if I can find the manual. I think it might be 30 Hz.

[Stustoys]

Never believe the Huanyang manual.
Due to a question in another thread I tried changing PD028(stopping freq or braking freq). The manual says 20hz max, I could set mine at 50hz. It may go higher if that wasnt my max spindle hz. I've no idea if it makes any difference but am going to old a resistor and try and find out.
I'll have to test the Teco.

Stuart