Resources Contact Us Home
Power supply system for electric discharge machines

Image Number 2 for United States Patent #5126525.

A power supply for an electroerosion machine having a switching element which controls the machining current in the gap. The value of the current is compared with a predetermined voltage and the signal generated based on this comparison is provided to a logic gate, advantageously an "AND" gate, whose output signal is applied to the control electrode of the switching element. The power supply supresses any arcing tendency during the gap short circuit conditions and increases the total current through the gap even when gap voltage is low in order to maintain a high machining rate. Electrode consumption is reduced by using a generally step-type current waveform signal. Machining current during the discharge period may be controlled to more closely approximate a square wave so that shifting to a faster machining rate can be easily accomplished by accepting some sacrifice in electrode consumption. Preferably, two or more switching and gating devices are used to permit gap current to flow intermittently during the entire discharge period.

  Recently Added Patents
Hardware/software debugging using memory access parameters
Method and device for extracting vapors in an injection molding machine
Food-grade flour from dry fractionated corn germ and collet composition and method for producing same
Non-zero rounding and prediction mode selection techniques in video encoding
MOS device for eliminating floating body effects and self-heating effects
Drive coil, measurement probe comprising the drive coil and methods utilizing the measurement probe
Bisphosphonate compounds
  Randomly Featured Patents
Dedicated nonvolatile memory
Tree cutting apparatus with improved cutting blade construction
Hydroxypyrazole derivatives, composition containing them and their use against microorganisms
Method of cleaning filter elements thereof
Protection system for part molding machines
Microprocessor having an effective BiCMOS extra multiple input complex logic circuit
Haloalkylmethyleneoxyphenyl-substituted ketoenols
Narrow width effect improvement with photoresist plug process and STI corner ion implantation
Sail shaping arrangement for a sailing craft
Tire protector