Intermediate circuit

from Wikipedia, the free encyclopedia

An intermediate circuit is an electrical device that, as an energy store, electrically couples several electrical networks on an interposed current or voltage level via a converter .

Block diagram for a device with an intermediate circuit

Use cases:

  • Electrical consumers often need the energy at very short intervals (e.g. starting an engine), but the supplying sources (public energy supply networks / emergency generators / power supplies / batteries, etc.) can only provide the energy to a limited extent for very short intervals provide.
  • Different alternating current networks do not have the same frequency and are therefore not synchronous. (For example, the public energy supply network in Europe works with 50 Hz, whereas the traction current network in Germany works with 16.7 Hz; an elevator drive must be supplied with a frequency of e.g. 0 to 400 Hz.)
  • Different alternating current networks (e.g. energy supply networks of different countries) have the same frequency, but are in different phase positions.
  • DC voltage networks can work at different voltage levels (e.g. 1.5 kV and 3 kV traction current networks).
  • Uninterruptible power supply that supplies a load from an accumulator in the event of a power failure .

For this reason it is necessary to check the voltages or currents of the different networks

There are three different procedures:

Individual evidence

  1. Comparison of Traditional Inverters and Z-Source Inverters for Fuel Cell Vehicles ( Memento of the original from December 5, 2008 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. (PDF; 200 kB), Miaosen Shen, Alan Joseph, Jin Wang, Fang Z. Peng, and Donald J. Adams @1@ 2Template: Webachiv / IABot / www.ornl.gov
  2. Z-Source for Motor Drives (PDF; 555 kB) Power Drives and Motor Drives Laboratory at Michigan State University