Posted 15 June 2006 - 08:22 AM
I used it with DC reactor. And this VSD is used to drive a plastic machine.
My problem is: when I turn this machine without any load, it can work very smooth and normally.
but when I place the 1/4 of the load, the motor seem like there is any braking or one of the phase is loss.
And there is any alarm fault said about "over voltage".
I try this VSD to a lighter motor and this VSD is work normally.
After I tried it again in 22 kW motor it worked not stable. After all there is an alram about IGBT fault.
I have checked this IGBT and one of them is fault (short circuit).
This IGBT type is PM200DVA120 manufactured by Mitsubishi.
And now I want to buy this IGBT but i'm afraid that there will be any fault again in other IGBT or maybe the new one.
Anyone can give me advice where I must checked this problem?
Especially inside the inverter, maybe in optocoupler or in the power supply setting or else.
The motor seem ok , cause now I drive it with another VSD and work very well.
Or maybe anyone have this VSD manual book can give me some copy or info where I can have this manual book.
Posted 15 June 2006 - 08:24 PM
please give some info regarding the type of load: friction load, low- or high-inertia load, or "extruder" "mixer" etc.
If the load is inertial, please specify if there is an electronic brake unit connected to the DC bus of your inverter.
Posted 09 August 2006 - 12:00 PM
If voltage regeneration is an issue: a simply fix increase the deceleration else put in a braking circuit
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