IGBT, MOSFET, HVFET high frequency switching process
Introduction
high-tech operate engineering company IPM develops and patent grant
with DE10328937 a dual high power, high frequency switching unit which
works with hybrid drives, compact EMI safe semiconductor stages,
sup****ting 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=2Eg. 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/electrostatic perforation for fast
running paper webs using IGBT, MOSFET or HVFET semiconductor power
stages. These circuits working as upward converters with extremely
short time power pulses in ranges from 2 =B5s up to 15 =B5s, high current
peaks up to 300 Amps by du/dt of 1000V/=B5s 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 levels, depend of the industry
application.
Advantages
Dual IGBT, HVFETS or MOSFETS semiconductors in high power, high
current, high voltage circuits obtain in electrostatic nano, sub micro
perforation, 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 ****osity 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 sup****ting 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 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 ****es and products made
of these materials. Materials fini****ng 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/zone designs. ****e sizes
from 1 to 100 microns, ****e distributions of up to 4 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
****osity 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
****osity 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-****osity.html
http://www.microperforation.com/igbt-esp-unit.html
http://www.microperforation.com/online-perforation-cigarette.html
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