Herbrata68
Mining
- Jul 1, 2018
- 1
My subcontractor use ABB ACS580 instead of ACS880.
They argue that can program to control crane with it.
Load capacity and motor power is no problem here,
but the purpose of inverter I concern here.
Latter:
Its already tested and it was fail.
First because of scalar control, next try with vector and I will soon report again.
Second, the failure is when try to stop the boom (load) when upward or downward, the motor not stop directly but need about a second to brake.
In that delay time the load is then (still) moved downward.
Worse when moving load downward.
Try to make 0 sec deceleration time, still not working, there is a delay about 1 sec before the mechanical braking close in.
They said they need a Dynamic Braking Control Unit and Brake Resistor to solve the problem.
I read the manual document, nor of them said ACS580 is a fully 4 quadrant drive inverter.
From ABB site:
" In certain processes where the load can also be generating, the energy needs to be absorbed. For short generating loads the traditional solution has been a braking resistor where the power generated has been transformed into heat losses. If however the load is generating all the time, a true 4-quadrant rectifier is needed."
And from:
ABMO 10002 | convertisseur de fréquence =<1 kV | appareillages électriques à basse tension | Industrie | Tous les produits | | Electro-Matériel SA layout3 - 4-quadrant operation possible : No
=================
End of story, maybe next month try with vector control and Dynamic Braking and Brake Resistor install.
They argue that can program to control crane with it.
Load capacity and motor power is no problem here,
but the purpose of inverter I concern here.
Latter:
Its already tested and it was fail.
First because of scalar control, next try with vector and I will soon report again.
Second, the failure is when try to stop the boom (load) when upward or downward, the motor not stop directly but need about a second to brake.
In that delay time the load is then (still) moved downward.
Worse when moving load downward.
Try to make 0 sec deceleration time, still not working, there is a delay about 1 sec before the mechanical braking close in.
They said they need a Dynamic Braking Control Unit and Brake Resistor to solve the problem.
I read the manual document, nor of them said ACS580 is a fully 4 quadrant drive inverter.
From ABB site:
" In certain processes where the load can also be generating, the energy needs to be absorbed. For short generating loads the traditional solution has been a braking resistor where the power generated has been transformed into heat losses. If however the load is generating all the time, a true 4-quadrant rectifier is needed."
And from:
ABMO 10002 | convertisseur de fréquence =<1 kV | appareillages électriques à basse tension | Industrie | Tous les produits | | Electro-Matériel SA layout3 - 4-quadrant operation possible : No
=================
End of story, maybe next month try with vector control and Dynamic Braking and Brake Resistor install.
