Power supply for electro-erosion machine
AssigneeTai-I Electron Machining Co., Ltd.
InventorTong-Han Lin
Life of this patent
Estimating the term…
Abstract
A power supply for electro-erosion machine comprises a capacitive network in series connected in the current loop for limiting or controlling the current flow through the gap formed by electrode and work-piece, a switching device is adapted to change the direction of charging/discharging current of the capacitive network, a driving circuit (firing circuit) is adapted to drive the switching device on and off so as to control current flow through the capacitive network. This lower resistance circuit eliminates huge power loss and reduces switching stress of the switching device. The electro-erosion ON-OFF time signal and the current-pattern control along with the circuit, constitutes a compact, low electrode wear and low electromagnetic noise electro-erosion machine power supply.
Claims30
A power supply for electro-erosion machine comprising a power source, a gap formed by electrode and work-piece, a means of controlling current of said gap, and the said means comprising:
- a device being connected in between said power source and said gap to control the gap current, said device comprising a capacitive network, switches and driving circuit to fire said switches, wherein said capacitive network being in series connected in the current loop for controlling or limiting the current flowing through said switches or said gap;
- said switches being connected with said capacitive network and repeatedly operated to charge/discharge said capacitive network by multidirection current.
An electrical discharge machine comprising a power source, a gap formed by electrode and work-piece, a means of controlling current of said gap, and the said means comprising:
- a device being connected in between said power source and said gap to control the gap current, said device comprising a capacitive network, switches and driving circuit to fire said switches, wherein said capacitive network being in series connected in the current loop for controlling or limiting the current flowing through said switches or said gap;
- said switches being connected with said capacitive network and repeatedly operated to charge/discharge said capacitive network by multidirection current.
A method of controlling a power supply for electro-erosion machining having a power source, a gap formed by electrode and work-piece, and a means of controlling current of said gap, wherein the said means comprising:
- using a device being connected in between said power source and said gap to control the gap current, said device comprising a capacitive network, switches and driving circuit to fire said switches, wherein said capacitive network being in series connected in the current loop for controlling or limiting the current flowing through said switches or said gap;
- and
- said switches being connected with said capacitive network and repeatedly operated to charge/discharge said capacitive network by multidirection current.
Dependencies are inferred from the claim text.