In Motion

Reliance's Radde states motor suppliers can help converters handle increased press speeds by modifying equipment, supplying graphic interfaces and integrating into a press's overall computer controls. He recommends a fully enclosed motor to prevent premature failure, with thermal or explosion protection as needs dictate. Other key motor considerations he cites include sufficient cooling capability, meeting desired torque requirements and inverter duty ratings. "We are finding that motors must be rated for extreme voltage spikes of 1600 peak voltages and withstand .1 microsecond rise times," he says.