Achievements and Prospects in the Utilization of Kinetic Energy

Some aspects of the use of kinetic energy at the present state of technology and some new solutions are described. The fundamental element is shown in an operational diagram of an asynchronous motor (induction motor) with a static-frequency converter. A machine designed for manual electric welding, which admits electric arc powers sensibly higher than the power of the supply source, is presented as an application. This machine, acting in succession as motor and frequency converter when it rotates due to the kinetic energy accumulated in operating as a motor, is a unique machine, having the construction of an asynchronous motor with wound armature. Theoretical aspects as well as experimental results are presented. Electric arc welding machines using independent low power sources are mentioned. Conclusions are drawn, concerning present possibilities and prospects.