Abstract
Innovative energy conversion device has been developed for efficient wind energy utilization. This device has co-axial configuration and the rotational speed of the turbine can be kept constant by controlling rotational torque by Lorentz force with electrical power generation. The dynamic characteristics of the electromagnetic energy conversion device has been experimentally clarified. For a step-like change in input torque, both rotational speed and electric output power transiently increase and then decrease to a steady value with linearly increasing applied magnetic flux density. In case of a step-like change of input torque, it was clarified that the rated speed operation is realized with partially converging the rotational energy into electric power.
