Hospital therapy. Differential diagnosis of chronic bronchitis (CB) (most important)

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Hospital therapy. Differential diagnosis of chronic bronchitis (CB) (most important)

Lecture notes, cheat sheets

Directory / Lecture notes, cheat sheets

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29. Differential diagnosis of chronic bronchitis (CB)

Table

Differential diagnostic criteria for CB

<< Back: Diagnosis of chronic bronchitis (CB)

>> Forward: Treatment of chronic bronchitis (CB)

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Random news from the Archive

IGBT Modules for Three Level UPS Inverters 25.07.2008

SEMIKRON has introduced a new topology of miniature IGBT modules of the SEMITOP series for building three-level inverters for uninterruptible power supplies.

The modules are based on IGBTs with low static and dynamic losses, which can reduce the power dissipation level of a three-level circuit by 60% compared to a two-level converter. In addition, the proposed topology provides a significantly lower value of the distributed inductance of switching circuits.

The new modules are designed for use in UPS with a power of 5...80 kVA. The current range of the new modules with an operating voltage of 600 V is 20...150 A. In UPS applications, this allows you to create converters with a power of 5...80 kVA. Modules with three-level IGBT topology are available in two types of packages: SEMITOP3 (footprint 55x31 mm2) for current 20...50 A and SEMITOP4 (footprint 60x55 mm2) for current 75...150 A.

Miniature isolated IGBT modules of the SEMITOP series are 12 mm high and are fixed with a single central screw.

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