A sensorless control strategy for three phase PWM power supply rectifiers, a "phase tracking" concept, was proposed on last PESC'03. This method proved to he robust to system parameters changes and provided Line voltage estimation for Line current control. Discussion after the PFSC'03 presentation left concerns with respect to the control quality during line voltage fluctuations and under non symmetric tine conditions. This paper reports the behaviour of the proposed "phase tracking" control method under distorted supply voltage. The following voltage distortions are tested: voltage unbalance, over. voltage and under-voltage. The control was performed on a rapid prototype system for power electronics control. Experimental results of the test are presented.
This paper presents the results of experimental tests of the impulse response of selected, essential components of a drone. A standardized lightning pulse that is often used during immunity tests of electronic devices in the aviation industry was applied. A single-stroke voltage impulse generator, MIG0618SS, was capable of producing the desired pulses. The input voltage was injected into selected electronic circuits of the drone system and pulses were observed in different parts of the machine. This allowed us to build a model based on the transmittance of the circuits most exposed to lightning overvoltages. The conducted tests were supported by impedance measurements carried out with an LCR-8110G meter. The obtained results made possible the development of a preliminary drone simulation model, allowing us to determine the size of the disturbances arising in individual circuits during nearby lightning. A discussion of the influence of close lightning discharges on expected induced overvoltages in a drone electronics system is also conducted in the paper.
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