Power module switching voltage measuring method based on fringe electric field
A technology of power modules and fringe electric fields, which is applied in the direction of measuring current/voltage, measuring devices, measuring electrical variables, etc., can solve the problem of inaccurate measurement of device switching characteristics, improve reliability and integration, and reduce external influences.
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[0021] The present invention is further explained below with reference to the embodiments and accompanying drawings, but this is not intended to limit the protection scope of the present application.
[0022] At present, the measurement of the switching voltage of power electronic devices is mainly completed by the oscilloscope probe. This measurement method requires the direct electrical connection of the oscilloscope probe and the circuit under test, which will introduce additional capacitance and inductance to the circuit under test, resulting in a certain intrusion. The measured signal is delayed, and the oscillation phenomenon of the signal is exacerbated, which affects the accuracy of the measurement result. The influence of the voltage probe on the switching voltage waveform of the device is as follows: figure 1 shown.
[0023] figure 2 This is a schematic diagram of parallel plate capacitors. As the most common and common capacitors, parallel plate capacitors are wid...
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