High-temperature superconducting (HTS) generators for large-scale wind power generation systems attract much research attention. Excitation systems in HTS generators, particularly brushless HTS exciters, are a new challenge. To verify the possibility of a brushless HTS exciter in a large-scale wind power generator, we designed and fabricated HTS coils for a laboratory-scale wind power generator employing a brushless exciter. In order to supply dc current into the HTS coils, a brushless exciter was considered in the generator. All of the field coils were wound with an HTS coated conductor made of 2G GdBCO wire. The conduction cooling test was executed in a cryogenic test chamber to check the performances at 30 K. The detailed results of the operating performance of the HTS coils were discussed in detail.