Applying variable frequency drives to cranes, hoists
If you've ever applied Variable Frequency Drives (VFDs) to standard motors, I'm sure you know how critical it is to understand the specific application and to get all the required data so that you can apply the drive properly. It's not the time to guess or make assumptions. Most failed applications are a result of not getting all the information. When trying to apply VFDs to old or existing cranes and hoists, this holds doubly true. Several drive manufacturers sell their crane and hoist drives only through authorized "crane and hoist" dealers because the applications are fraught with potential problems. Before beginning one of these projects, make sure your insurance carrier covers you for the redesign and work on cranes and hoists.