GaryS
Member
There is no parameter in the drive you can monitor to set the shortest decal time
To determine the best decal would be to look at the ON OFF ratio of the braking transistor but you will need a good scope for that
As was mentioned earlier a good option would be to install an external DBU Dynamic Breaking Unit (Buss Loader) or a Line Regenerative Module
Keep in mind rapid deceleration comes with it’s own set of problems. I saw an impeller spin off the motor shaft because of the reverse torque induced on short decal time. I had another machine strip gears in the machine because the decal rate was too short
As for the buss voltage of 630v while running as I stated it is bit low for a 480v ac line
You can run at that and in fact you are running at that level. My guess is that your line voltage is around 430 - 440 range that’s still within the operating range of the drive. (400V Class) In fact you could run it in a single phase supply if you wanted to run at a reduced HP rating this is done often.
I actually have a drive on my shelf that’s rated 120V Single phase input 240V 3PH out
It’s amazing what a modern VFD can do if setup correctly
The best thing is to read and understand the manuals
To determine the best decal would be to look at the ON OFF ratio of the braking transistor but you will need a good scope for that
As was mentioned earlier a good option would be to install an external DBU Dynamic Breaking Unit (Buss Loader) or a Line Regenerative Module
Keep in mind rapid deceleration comes with it’s own set of problems. I saw an impeller spin off the motor shaft because of the reverse torque induced on short decal time. I had another machine strip gears in the machine because the decal rate was too short
As for the buss voltage of 630v while running as I stated it is bit low for a 480v ac line
You can run at that and in fact you are running at that level. My guess is that your line voltage is around 430 - 440 range that’s still within the operating range of the drive. (400V Class) In fact you could run it in a single phase supply if you wanted to run at a reduced HP rating this is done often.
I actually have a drive on my shelf that’s rated 120V Single phase input 240V 3PH out
It’s amazing what a modern VFD can do if setup correctly
The best thing is to read and understand the manuals