Methods to compute electrical strength and output electric characteristics of the rectifying diodes and compare their electric parameters

Article

Published: 03.06.2024

Published in issue: #6(150)/2024

DOI: 10.18698/2308-6033-2024-6-2366

Category: Aviation and Rocket-Space Engineering | Chapter: Thermal, Electric Jet Engines, and Power Plants of Aircrafts

The main problem in design and development of the rectifying diodes used in the spacecraft power propulsion systems lies in determination of their operating voltage (or the reverse arc breakdown voltage in the locked state), which together with the conducting state current density identifies the electric power characteristics. The paper proposes a method for computing electric strength characteristics in the rectifying diodes. The method combines several mathematical models to compute distribution of the electric field strength, potential and temperature of the cesium atoms in a cathode ion layer in the reverse current mode, study the system resonant properties (obtaining amplitude-frequency and phase-frequency characteristics), as well as studying the electrical strength characteristics of the rectifying diode (determining the diode reverse breakdown voltage). Based on combined introduction of the numerical, semi-empirical and analytical approaches, the diode output characteristics could be computed and justified; they include the breakdown and operating voltages. These characteristics are used as the basis in comparing the diode output electrical power characteristics and justifying a possibility of using the rectifying diodes in a particular current conversion system.

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