Abstract
The article describes a method for calculating the step-down transformer of an underwater part in a remote-controlled underwater vehicle supply system. The chosen technique allows determining the maximum frequency of voltage to transmit the power through the rope-cable. In addition, it was shown that an increase in the frequency of voltage along the rope-cable up to 10 kHz leads to a decrease in the weight and size parameters of the input step-down transformer for the underwater part of the power supply by more than 2 times. An undesirable consequence of increasing the frequency of the supply voltage is an increase in the reactive (capacitive) component of the rope-cable current. Compensation of the reactive component of the current is performed using the magnetization inductances within the transformers of the onboard and underwater parts of the power supply. The manifestation of the wave effect in the rope-cable of the power supply with an increase in the frequency of voltage transmission is considered. A condition for representing a rope-cable as a distributed parameterline is given. A method for calculating currents and voltages at any point of the line is presented. The nature of the change in the voltage amplitude along the rope-cable has been investigated. Mathematical modeling of the power supply of the remote-controlled underwater vehicle with a rope-cable, with power rating over 65 kW for a distance of up to 11 km at a frequency of 10 kHz was carried out. The voltage waveforms were obtained at the beginning and at the end of the rope-cable. The non-linear nature of voltage change along the line was confirmed.
Keywords
Remote-controlled underwater vehicle, power supply, rope-cable, voltage, frequency, transformer, overheating, losses.
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