Siemens Poly Power Units improve polysilicon manufacturing

The Siemens Industry Automation Division debuted Poly Power Units (PPU), modular power supplies for polysilicon manufacturing. The power units integrate easily with Siemens CVD reactors and forgo rigid cabinets to ease maintenance and factory floor planning.

September 15, 2011 — The Siemens Industry Automation Division debuted Poly Power Units (PPU), modular power supplies for polysilicon manufacturing. The PPUs boast good cooling properties and a small footprint; they can be integrated with production plant equipment via a flexible software parameter assignment. The PPUs allow exact power supply rating for any Siemens chemical vapor deposition (CVD) reactor depending on the number of pairs of silicon rods, as well as quick parameter assignment via the software.

The smaller footprint is acheived by eliminating rigid cabinets for the power supplies. This also allows easier component maintenance.

The Poly Power Unit is also integrated in the Simatic PCS 7 control system. This allows the use of energy management functions, Advanced Process Control algorithms, and a thermostatically controlled control loop for the energy carrier. Integrating the Poly Power Units into the total process control system allows the current infeed in the reactor to be exactly matched to the gas supply, said Bernhard Saftig, head of the Glass and Solar business segment of the Siemens Industry Automation Division, who notes that this exact match lends efficiency to the polysilicon manufacturing process.

The Poly Power Units contain Siemens power electronics that are already in use for large drive technology and in power semiconductors.

Siemens Industry Automation Division’s solar industry offering includes automation, sensor, and analytical products for polysilicon manufacturing. It includes components such as switchgear, transformers, and gas chromatographs. Learn more at www.siemens.com/solar-industry.

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