ACS880 INU's operation mode switch
Dear peers,
For my application, the INU's need to switch very fast between speed and torque mode. I have a few questions regarding this:
a) Is it better/faster to remain at one operation mode (EXT1 or EXT2), and then change the control mode to speed or torque? Or...
b) ... is it better/faster to have EXT1=speed, EXT2=torque and switch between this two?
c) What reference needs to be fed to the inverters while switching? For example if the drive is speed controlled at 1000 rpm (an say delivering 5% torque) and it needs to switch to torque control to -50%. Can you just send -50% torque during the whole transition? Or do you need to feed 5% first and go to 50% once the drive has switched to torque?
d) Does stability play a role in control switching? For example, in my setup I have experienced that if the drive is at 0 speed but not stable, it won't switch to torque mode.
Hope you can help me with this? Thanks in advance.
For my application, the INU's need to switch very fast between speed and torque mode. I have a few questions regarding this:
a) Is it better/faster to remain at one operation mode (EXT1 or EXT2), and then change the control mode to speed or torque? Or...
b) ... is it better/faster to have EXT1=speed, EXT2=torque and switch between this two?
c) What reference needs to be fed to the inverters while switching? For example if the drive is speed controlled at 1000 rpm (an say delivering 5% torque) and it needs to switch to torque control to -50%. Can you just send -50% torque during the whole transition? Or do you need to feed 5% first and go to 50% once the drive has switched to torque?
d) Does stability play a role in control switching? For example, in my setup I have experienced that if the drive is at 0 speed but not stable, it won't switch to torque mode.
Hope you can help me with this? Thanks in advance.
Asked 8 months ago
Answers
0
1. It's better to switch between EXT1 and EXT2.
2. It's better and more easily to send only -50%.
3. No.
2. It's better and more easily to send only -50%.
3. No.
Answered 6 months ago
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