Micro-Speed® series MULTI-VECTOR®, CX® & SMART MOVE® drives are the key components of your future crane electronic drive system. Incredibly robust, PE equipment is well known to be the most reliable, the easiest to use and install and the "gold standard" for crane control.
A.C. squirrel cage induction motors are characterized as being "constant-speed" when they are run from a typical 50 Hz or 60 Hz power source. If the power source frequency (Hz) can be adjusted, the motor speed can be varied and the actual running speed of the motor and other functions can be controlled. This is where Power Electronics International, Inc. comes in.
Simply put, Micro-Speed® variable speed crane drives uses the existing A.C. (alternating current) and changes it into D.C. (direct current) via an electronic technique called PWM (pulse width modulation). The D.C. is then turned back into Variable Frequency Alternating Current (V.F.A.C.). By varying the frequency (Hz) the motor speed can be controlled. And by adding modern state of the art microprocessor computer technology, all types of extra features are added to make your crane, through the Micro-Speed® drive, have an "intelligence" of its own. Older retrofit cranes and new cranes can be inexpensively converted to have almost "Star Wars" type of robotic control. All with just a standard, off the shelf, A.C. motor which already comes on your A.C. bridge/trolley or hoist.
These drives, through many hardware and software features, have become the single most productive and cost effective method for updating industrial, government and commercial job sites.