Apparatus for transporting materials to be transferred and method of controlling exciting current therefor

Abstract From the Canadian patent

Disclosed is a steel pipe transporting apparatus provided with a plurality of skid rails slantingly arranged from a feed-in end to a feed-out end of the apparatus so as to transport the steel pipe by causing the steel pipe to roll down on the skid rails from the feed-in end to the feed-out end, and a method of controlling the apparatus. The apparatus comprises a plurality of electromagnet arranged to be in opposition to the steel pipe and along the skid rails from the feed-in end to the feed-out end, each of the electromagnets including an inner pole having an exciting coil wound thereon and a pair of outer poles arranged at the opposite sides of the inner pole and connected to the inner …