HTS bulk can trap higher magnetic field than a permanent magnet and electric motor and actuators are promising applications. The HTS bulks in those electric machines are exposed to AC magnetic field perturbations, which cause AC losses in the bulks. Therefore, it is important to understand the AC loss characteristics. In the previous works, we measured the AC losses by an electric method using the double pick-up coils method. This time, we measured the AC losses by a calorimetric method using a cryo-cooler and heater at different temperature. In this paper, the AC losses measured by the electric and calorimetric methods are compared with each other to investigate the validity of the measurement methods.
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