Techniques for plasma injection for space charge neutralization of an ion beam are disclosed. The ferrite particles are associated with an exterior surface of the iron-based particles and, after compression molding by a powder metallurgy technique, are incorporated into the microstructural pores between adjacent particles of iron-based powder. The reflective electrode includes a plurality of embossing members arranged repeatedly thereon to form an embossing pattern. The correlation of the open circuit voltage to the state of charge is dependent on the battery’s mode of operation. The increased field current or field voltage is applied to the excitation circuit of the synchronous motor. The control system includes a washout filter for transforming input forces and rotational movements.