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
Unsupervised document clustering using latent semantic density analysis
Polyureas made from aminocrotonates and enaminones
Triazolylphenyl sulfonamides as serine/threonine kinase inhibitors
Retransmission control method, base station and mobile station
Power supply system for a data storage system and a method of controlling a power supply
Ni-, Co-, and Mn- multi-element doped positive electrode material for lithium battery and its preparation method
Method of and apparatus for laser drilling holes with improved taper
  Randomly Featured Patents
Separation of a mixture of C.sub.4 -hydrocarbons by extractive distillation
Battery power source device including rechargeable battery and circuit board joined thereto
Display unit and method of fabricating the same
Rotary piston fluid handler
Magnetic recording apparatus having a reduced thickness
Underwater camera housing having interchangeable back members to accept still and video cameras
Heat exchanger
Multi-function customer satisfaction survey device
System for and method of removing or preventing electrostatic charges from an organic photoconductor during transit
Method and apparatus for locating faults in an optical network