Analytical estimation of the Roebel bar losses

The paper presents an analytical method for the Roebel bar losses computation. The most general Roebel bar structure, including both solid and hollow elementary conductors was considered. Using the proposed method it was developed a computing program which estimates with a good accuracy the bar losses. One can analyze the influence of any input quantities (machine and material data) on the bar losses. So it is possible to optimize the Roebel bar structure for the machine efficiency improvement.