Shunts replace transformers in large inverters to improve current metering performance
Isabellenhütte and Semikron are Siemens Drive Technologies Suppliers
Isabellenhütte and Semikron are Siemens Drive Technologies Suppliers(firmenpresse) - Isabellenhütte, Semikron and Siemens Drive Technologies have cooperated to develop a 3 phase shunt module for the Siemens SINAMICS G120 frequency inverter series. This series is intended for measuring phase currents of up to 20 A through shunts on the circuit board. Apart from this, currents of up to 400 A can be measured with outstanding precision and long-term stability using the jointly developed shunt modules in Semikron’s Semitrans housing.
The PM240 high-performance parts for SINAMICS G120 inverters make it possible to extend the current range of Isabellenhütte’s Type BVR electron-beam welded composite material precision resistors to 800 A and power output to 132 KW. For this purpose, the resistance of shunts used in this area was reduced from 3 to 1 mOhm, and the module’s layout was optimized. The housing’s interior was also adapted to the terminal link design. The isolated shunt installation, integration of 3 phases in one case and optimized power loss heat dissipation by a DCB substrate, as well as the module’s size, were not changed. Generally, the module’s resilience and reliability were improved. This means that users will still have a compactly built product with unprecedented value for money.
This new current measuring module is the first to permit measuring currents > 500 A in industrial serial application with four parallel SMD precision resistors with a deviation of less than 0.3 % in a temperature range between -25 °C and 125 °C. At the same time, the system’s drift throughout its life cycle is < 0.5 %. A prerequisite for this is the shunt’s resistance alloy, which was optimized for this purpose.
Using shunt current measuring in this area of performance as well resulted in a very compact frequency inverter that may be used for operating engines with a power rate of up to 132 KW instead of the former 90 KW.
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About Isabellenhütte Heusler
Isabellenhütte Heusler GmbH & Co. KG has its roots in more than 500 years of smelting and metal processing. The company was first documented in 1482. In 1827, it was transferred to the Heusler family. Today, it is one of the globally leading producers of low impedance high precision and performance resistors. In 1987, Isabellenhütte Heusler was the first business in the world to produce SMD mOhm current sensing resistors. Other business areas include producing thermoelectric and resistance alloys and measuring technology products. Employees at the office and production site in Dillenburg (Hesse) number approximately 500.
Isabellenhütte Heusler GmbH & Co. KG
Eibacher Weg 3-5
D-35683 Dillenburg
Dipl.-Ing. (FH) Thomas Otto
Phone: +49 2771 / 934-282
otto(at)isabellenhuette.de
Wassenberg Public Relations für Industrie & Technologie
Michaela Wassenberg
Rollnerstr. 43
D-90408 Nürnberg
Phone: +49 911 / 598 398-0
press(at)tech-communications.net
Datum: 19.05.2009 - 15:51 Uhr
Sprache: Deutsch
News-ID 1906
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contact information:
Contact person: Michaela Wassenberg
Town:
D-Dillenburg
Phone: +49 911 598 398-0
Kategorie:
Electronics & Semiconductors
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