Torque Required to Run a Roller

have you taken care of friction et al while calculating the required power?

What about the motor starting current (typically 5-7 times FLC unless you have VFD or other starting mechanism)

When did it burn? at start or later?

I used Motor

for star-delta start

star- 230 volt 50 Hz 2.2 kW 6.2 A

delta- 400 volt 87 Hz 2.6 kW 6.2 A

but i used invertor that mean motor have alway 2.6 kW isn't it?

I think it overload while acceleration from 0 to 0.5 m/s

In Star it should be 400 V 50 Hz

In Delta it Should be 240 V 50 Hz

What are U using a VFD?

In Delta are U using 87 Hz?

What is the application of this roller?

Please mention the Motor Nameplate and Inverter Specifications?

Waiting for Ur reply