Power supply for an electrostatic filter

US4779182A · kind A · utility

Assignees

• Metallgesellschaft AG · DE
• Siemens Aktiengesellschaft · DE

Inventors

• Hermann Mickal · Erlangen, DE
• Hartmut Gaul · Königsee, DE
• Walter Schmidt · Bellikon, CH
• Franz Neulinger · Langen (Hessen), DE
• Helmut Schummer · Heusenstamm, DE

Key dates

• Filing date: Jun 24, 1986
• Grant date: Oct 18, 1988
• Expiry date: Jun 24, 2006

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S323/903
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

In order to scrub a waste gas, for example, of foreign matter by means of an electrostatic filter, a power supply is provided which contains a converter whose output feeds the primary winding of a high-voltage transformer. The secondary winding is connected to the electrostatic filter via a high-voltage rectifier. Disposed in the intermediate circuit of the converter is a control element for the intermediate circuit current. This shields the supply network against the effects of the power converter commutations and of short-circuits in the filter to a great extent. A limiter for the filter voltage and a temporary separation of the transformer from the inverter in case of filter short-circuits may be provided to reduce the stress on the components which can be made small if a high-frequency working cycle for the setter and the inverter is used.