Study of long-stroke electromagnetic hammer operation modes by computer simulation

Abstract

The study is given to the operation modes of a long stroke electromagnetic two-coil hammer with increased striker velocity and impact energy. Theoretical studies involve the use of the methods of field theory and mathematical apparatus of the systems of linear and nonlinear differential equations. Experimental studies are carried out by modeling methods and field tests. The mathematical model of the long stroke hammer is obtained using experimentally obtained static characteristics of the flux linkage and the thrust force for each of the windings. The oscillograms of winding current, striker velocity and travel are obtained. The amount of the energy consumed from the network, power losses in copper, impact energy and hammer efficiency in one operation cycle are determined. A long stroke operation mode of a conventional hammer can be used to improve its operation efficiency. In this case, the values of the impact energy and efficiency of the long stroke hammer significantly increase, whereas the impact frequency decreases and the heating of the machine practically does not change.