Abstract
The scope of optical radiation power supply systems application (RPSS) is much wider than that of traditional measuring systems. But, like any power supply system, it is characterized by a level of efficiency, which can be used to assess the overall performance. The key element of the RPSS is a photovoltaic converter (PVС), which provides the conversion of optical radiation into electrical power necessary to power measuring devices and sensors. PVC with increased conversion efficiency is able to increase the efficiency of the entire power supply system, however, for this it is necessary to meet the conditions for uniform illumination of the PVC placed in the housing. Basically, this concerns the correct matching of the optical fiber through which the radiation is transmitted with the housing containing the PVC. The solution to this problem is to create a combined fiber path consisting of a gradient and a stepped multimode fiber light guide. In addition to creating a combined fiber path, it is recommended to use special mode filters in the system, which makes it possible to obtain both reproducible mode distribution during docking and accurate values of losses in the path. The resulting RPSS provides sufficient efficiency and reliability to be used even in high-voltage networks and devices. For example, this article suggests a method for measuring the temperature of a magnetron cathode based on a RPSS. The diagram of the RPSS connection to the anode is shown and the system operation principle is described. Unlike current methods, this method is more accurate and provides galvanic isolation of the cells and is absolutely safe due to the metal conductors exclusion. During the measurement, it is possible to adjust the power of the filament circuit, adjust the output power of the magnetron and maintain the optimal operating temperature mode.
Keywords
photovoltaic converter, measurement system, optical radiation supply system, luminous flux, electric power, optical fiber, magnetron, temperature, incandescent current
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