Electromechanical energy conversion in a system with a bulk high-temperature superconductor. Part 2. Device operation analysis

The operation of a linear electromechanical vibration device with a part made of a high-temperature superconducting (HTS) material is analyzed. Converter models considered in the first part of this paper [1] are used in the calculations. The parameters of the model of HTS material properties are determined by comparison of the data obtained by calculations and by experimental investigations of force interactions in the laboratory device model. Functions of flux linkage and current force in the coil and permanent magnet movements are calculated for a macroscopic model based on analysis of the electromagnetic field. The calculation results of the operation parameters of the electromechanical converter are shown in the form of amplitude-frequency characteristics of the current in the coil, the permanent magnet movement amplitude, and electrical and mechanical power. Dependences of powers, efficiency, and current phase on the active mechanical load on the resonant frequency are determined. The obtained characteristics are compared with simulation data of a similar converter without the HTS element. It is concluded that the HTS elements significantly change the parameters of the conversion of electrical energy into mechanical energy. It is shown that the electromechanical converters with bulk HTS elements can be more efficient than converters of traditional design.