PULSE GENERATOR WITH ADJUSTABLE AND CONTROLED UPWARD IMPULSE CURRENT

Title:

PULSE GENERATOR WITH ADJUSTABLE AND CONTROLED UPWARD IMPULSE CURRENT

Document Type and Number:

WIPO Patent Application WO/2016/204699

Kind Code:

A3

Abstract:

The object of the invention is a pulse generator intended for sinking electrical discharge machining, comprising an ignition module and a power module, in which the speed of current increase is set by a supply voltage of the power module of the generator uj. This voltage is a sum of an average discharge voltage uep and a selected voltage difference between the supply voltage of the power module of the generator and the discharge voltage dueji. These values get summed up in a circuit (d) and a signal for the control of the voltage uj is delivered. A circuit (e) controls the speed of increase in the current diej/dt by measuring the pulse current iejn from a sensor (h) and the time needed for current increase up to selected values iejni. In case when the time of the increase in the current trn is smaller than a selected value trni, a signal from the circuit (e) interrupts the pulse. The energy efficiency of the generator can be increased by turning off a resistor in the power module of the generator Rj, until the current reaches the selected maximum value iejmi. The influence of the resistor Rj and additional inductance L on the speed of increase in the current diej/dt is eliminated since the resistor Rj of the additional inductance L are turned on only when the current iej reaches the selected value iejmi. The yield of the generator can also be increased by interrupting side discharges with lower supplied energy and by switching on a next pulse after a selected break t0.

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Inventors:

DOBOVŠEK MARJAN (SI)

Application Number:

PCT/SI2016/000017

Publication Date:

February 09, 2017

Filing Date:

June 16, 2016

Export Citation:

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Assignee:

DOBOVŠEK MARJAN (SI)
HASS RÜDIGER (DE)
RISTO MATTHIAS (DE)
DOBOVŠEK JURE (SI)

International Classes:

B23H1/02

Foreign References:

US5539178A	1996-07-23
US6660957B1	2003-12-09
US5280153A	1994-01-18
US20150027992A1	2015-01-29
US20140190941A1	2014-07-10

Attorney, Agent or Firm:

PIPAN, Marjan (SI)

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