  In this work we present a modeling tool designed to estimate the hysteretic
losses in the coils of an electric generator with coils made of coated
conductor tapes during transient operation. The model is based on a two-stage
segregated model approach that allows simulating the electric generator and the
current distribution in the superconducting coils using a one-way coupling from
the generator to the HTS coils model. The model has two inputs: the rotational
speed and the electric load signal. A homogeneous anisotropic bulk model for
the coils allows computing the current distribution in the coils. From this
distribution, the hysteretic losses are estimated. Beyond the interest on
providing an estimate on the global energy dissipation in the machine, in this
work we present a more detailed local analysis that allows addressing issues
such as coil design, critical current ratting, electric load change rate
limits, cryocooler design, identification of quench-prone regions and overall
transient performance.
