Prevent oscillation in distributed power systems
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Distributed power systems can oscillate, especially when driving one power supply with another power supply. The input and output impedances of a power supply can predict this oscillation. Before looking at the specific details of the oscillation criteria we will review the basics of impedance.
Most engineers understand impedance from a dc standpoint. The assumptions for the dc impedance model (resistance) are that voltage and current never change. Impedance, by contrast, can vary with
frequency. It only assumes that the circuit is linear; that is, if you apply a voltage, see the current respond, and then apply a voltage waveform twice as big, the current waveform will be the same shape and twice as big.... often a good assumption.
Download this white paper to learn what causes distributed power systems to oscillate and how you can prevent oscillation.
The White Paper will review:
- Basics of Impedance
- Voltage and Current Waveforms
- Polar Impedance
- Impedance Matching
- Oscillation Criteria
- How to Avoid Oscillation
Visit Venable Instruments' site to access the helpful white paper