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
Method and apparatus for accessing and downloading information from the internet
Method for manufacturing a turbine engine vane
Process for producing polyols
Image processing apparatus, image processing method, and program
Implicit certificate scheme
Tone enhancement bracket
Robot control device
  Randomly Featured Patents
Fixing device for a vehicle seat
Hand control device
Stuffing method and apparatus
Shutter mechanism for telephone directory
Method of driving an organic electroluminescent device comprising a phosphorescent light emitter
Wedge and transverse magnet arrays
Method for detection of occurrence of printing errors on printed substrates during processing thereof on a printing press
Method for stabilizing the hygral expansion behavior of protein fiber products
Synthesis of chabazite-containing molecular sieves and their use in the conversion of oxygenates to olefins
Integrated load impedance sensing for tunable matching networks