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CURRENT MEASUREMENT IN STATIC CONVERTERS AND REALIZATION OF A HIGH FREQUENCY PASSIVE CURRENT PROBE (50A-300MHz)
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| Author(s) |
E. Labouré; F. Costa; F. Forest |
| Abstract |
The measurement of currents in static converters and specially the analysis of switching phenomena in semiconductor devices make necessary the use of current probe with large frequency bandwidth, high currents capability and low electromagnetic susceptibility (Typical stress values in medium power converters: I: 50A RMS; dl/dt: 1000A/μs; dV/dt: 10kV/μs). The first part of this paper concerns the description of current measurement techniques. We show why current transformer is a good way to measure current. An elementary structure based on a ferrite core, a winding and a resistor load is first tested. A high frequcncy electrical model is presented. It is used in numerical simulation of the frequency response and allows to pick the more significant parameters. We analyze the way of improving electrical performances and the electromagnetic susceptibility. Then we show some experimental results obtained with such current probe. |
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| Filename: | Unnamed file |
| Filesize: | 3.48 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-07-25 by System |
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