IGBT, MOSFET, HVFET rf hv for nano micro technology - patent grant

IGBT, MOSFET, HVFET rf hv for nano micro technology - patent grant
Introduction high-tech operate engineering company IPM develops and patent grant
with DE10328937 a dual high power, high voltage, high frequency switching unit which works with hybrid drives, compact EMI safe semiconductor stages, supporting capacitors and high voltage ferrite transformers to generate extremely short HV pulses and sparking groups. Advantages are based on uses of standard circuits with extended semiconductors for e.g. nano, sub or micro perforation applications, corona treatments etc.
IPM is looking for science or industrial partners who are interested in a licence agreement and/or technical cooperation for other wide application fields.
Working principle Industry application of electro or electrostatic perforation at fast running paper webs uses IGBT, MOSFET or HVFET semiconductor power stages. These circuits working as upward converters with extremely short time power pulses in ranges from 200 ns up to 15 s, high current peaks up to 300 Amps by du/dt of 1500V/s on a serial connected inductivity and loading condenser that the secondary ferrite transformer coils supply the sparking electrodes up to 50 KVss as a permanent open loop and short circuit.
A safety circuit logic and two hybrid drivers allows a alternately switching of semiconductor A/B which generating higher operation frequencies and power levels meanwhile the electrical/thermal conditions remains on each in the same range as a single switching unit.
In conclusion the approximately double frequency and power level operation obtains higher switching efficiencies, more perforation power or higher corona treatment level, depend of the industry application.
Advantages Dual IGBT, HVFETS or MOSFETS semiconductors in high power, high current, high voltage circuits obtains in electrostatic nano, sub micro perforation, surface treatment, nano surface modifications, corona treatment or other switching application frequencies up to 250 KHz, 1400 V/ce, power levels up to 30 KW and more. Higher power efficiencies and harder switching periods are further advantages.
A controlled pulse timing into a certain time window with a constant or variable frequency generates hole sizes and hole sequences with high voltage sparking through the material webs. The repeating frequencies of the entire circuit can up to the double switching frequency of each semiconductor.
For example by electrostatic perforation porosity ranges from 80 C.U. - 2500 C.U., paper web speeds up to 450 m/min and web widths up to 2000 mm are archive able.
Other applications Corona treatment units, surface treatment, high power switching devices, power supplies, AC/DC drives, AC/DC or AC/AC converters, laser diode power supplies, compact switching converter systems, etc. The new dual semiconductor allows applications to build hybrid drives, semiconductor high-level stage, upward, downward or other converters or generators which operating with supporting capacitors, high-voltage ferrite transformers in an extremely compact and modular way. Several advantages are the high efficiency of pulse/power transmission and energy ratios.
Traditional corona or other medium frequency generators up to 30 KHz operation range are easy to modify to double frequency and power levels.
Future prospects The electrostatic ESP nano or micro perforation in pore ranges from 10 nm up to 100 um usually applies within ranges of the refinement of fine paper, packaging webs, bonded fabrics, non-woven, filter paper, bag or force paper as well as special paper webs of most diverse kind especially when additionally treating course materials for achieving special characteristics which for physical or process reasons cannot be achieved by other process technologies.
Our highly modern, industrially approved ESP perforation technology operation which even can be relied on when operated 24/7 can be integrated into existing rewinding course devices or other course devices. Also, they can be used as completely independent perforation devices.
Micro Perforation Perforation results are now achieve for nano, sub and micro perforation of flexible webs with ultra small pores and products made of these materials. Materials finishing are of interest for numerous tasks in the field of packaging, in filling, non woven industry, for technical and science applications, etc.
For many years fine and other paper webs with base weights between 20 up to 150 g/sqm have been perforated electro statically in large areas or zone designs.
Pore sizes from 10 nm to 100 microns, pore distributions of up to 10 Million/sqm in area perforation or respectively 2OO/sqcm by zone perforation by up to 16 Million holes per Second can be reached.
Air permeabilities or porosity ranges are among from 50 up to 2,500 C.U. (ml/sqcm/min) respectively 3 to 50 l/sqm/sec. (Franksystem ) are now possible.
Web width from 100 to 2000 mm at speeds of up to 500 m/min, depending on porosity and material consistency in relation to it's ability to perforate.
New ranges of applications will be made accessible as new products with special features will be developed.
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IPM - International Perforation Management High-tech engineering - China - Germany - Thailand http://www.microperforation.com http://www.microperforation.com.cn http://www.deguodaguan.com/ipm / http://www.dk3qv.de
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http://www.microperforation.com/mll-1-laser-perforation.html http://www.microperforation.com/lpm-1.html http://www.microperforation.com/opss-1-optical-online-porosity.html http://www.microperforation.com/igbt-esp-unit.html http://www.microperforation.com/online-perforation-cigarette.html
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