Variable-speed drive packages must be able to talk to everything from PLCs to the simplest switches. Speed optimization features also improve productivity, as do remote operator interfaces that link ...

Prior to the advent of the adjustable-speed drive (ASD), the polyphase induction motor operated as a constant-speed motor. Figure 1 shows the well-known torque and current curves versus speed for the ...

Over the past few months, Computerworld has reviewed the latest in hard disk drive technology, from large-capacity 1TB models and energy-efficient “green” drives to solid-state disks that outpace ...