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Stellarators commonly comprise different sets of coils to produce diversemagnetic configurations. However, the diversity of possible configurations in asingle device is usually rather limited. The achievement of a broad variety ofmagnetic configurations might be valuable for some purposes, for example, toassay the effect of the magnetic configuration on turbulent transport. Thus, amethod is created to systematically define sets of modular coils located onconcentric toroidal winding surfaces. The method is based on the expression ofa Last Closed Flux Surface (LCFS) by Fourier coefficients in cylindricalcoordinates and consists in the definition of successive windings located onequidistant concentric winding surfaces, each winding such that produces amagnetic field which, when added to the magnetic field generated by a sole basewinding that generates a base magnetic configuration, produces a magneticconfiguration whose LCFS is defined by the Fourier coefficients of the basemagnetic configuration plus only one new Fourier coefficient. The utilizationof a diversity of currents in the different windings would give a linearcombination of magnetic fields that reproduce the LCFS defined mathematicallyby the respective Fourier coefficients. The deviation between a particularmodelled LCFS and the obtained LCFS from the windings depends on: the order andvalue of each Fourier coefficient, the selected shape of concentric windingsurfaces, and the possible intersection of the LCFS with the internal windingsurface. The method to generate the windings is reported and the application toone case study is described. Each modelled LCFS is compared with the respectivePoincar\'e plot obtained from the linear combination of magnetic fields fromthe windings.

Generic configuration stellarator based on several concentric Fourier windings