A general winding law for twisted coils is described in terms of analytic functions. On a toroidal surface given as x vector = x vector (phi,THETA) (phi = toroidal coordinate, THETA = poloidal coordinate) the current filaments phi = phi/sub kappa/(THETA) are represented in terms of sin-functions. The paper includes several examples of classical stellarator and HELIAC configurations. By specifying a separate winding law for every single coil also WVII-AS type configurations can be modelled. The numerical code describing the central filament and the borderlines of the coils are given in the appendix. (ERA citation 12:019782)
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