New ProductsMay 8, 2022

Motor drive for advanced tension control

Motor drive for advanced tension control

Improved control algorithms allow the new model to drive both SPM and IPM motors.

Delta’s new advanced compact AC motor drive MH300 series offered in Europe, the Middle East, and Asia (EMEA) offer a power range of 0.4 to 75 kW and numerous tension control features, it’s suitable for a wide range of constant torque applications, such as machine tools, extruding machines, bending machines, conveyer systems, and eventually also for cranes and hoists.

The MH300 product series also comes with a built-in EMC filter to limit electromagnetic emissions. Improved control algorithms allow the new model to drive both SPM and IPM motors. Zero speed holding torque with IPM motor in open loop control is possible out-of-the-box — there is no need to install an extra encoder.

The MH300 comes with the ability to calculate roll diameter using linear speed, material thickness, and distance. Two PID parameters allow industrial facilities to control tension at motor startup for small and large rolls at both high and low speeds. Since the amount of torque required to tension the web depends on the remaining diameter of the roll, the MH300 can also perform a tensor taper calculation. This automatically adjusts tension in line with roll diameter to avoid wrinkles and deformation of the web span during roll-to-roll processing. Friction and inertia are automatically compensated during winding and unwinding to keep the tension constant. The automatic roll change feature only needs an external signal, shutting down the machine is not necessary.

The overload capability of the new MH300 drive is 150% for a period of one minute or 200% over three seconds, making it suitable for constant torque applications.