DEVICE FOR CONTROLLING THE ON AND OFF TIME OF THE METAL OXIDE SEMICONDUCTOR FIELD EFFECT TRANSISTOR (MOSFET), A DEVICE FOR SPARK COATING THE SURFACES OF METAL WORK PIECE INCORPORATING THE SAID CONTROL DEVICE AND A METHOD OF COATING METAL SURFACES USING THE SAID DEVICE

摘要

The present invention is a device for coating surfaces of metallic work pieces with an electrically conductive material by employing short duration high current packets of pulses in which the work piece forms the cathode and the consumable coating material forms the anode, which are connected to a generator for generating pulses by charging and discharging a bank of capacitors using a MOSFET. The invention is also a device for controlling the on and off time of a metal oxide semiconductor field effect transistor (MOSFET)