In the measurement of nonlinear power capacitor, large DC (direct current) voltage and small AC (alternate current) sinusoidal voltage connected in series are applied to the nonlinear capacitor. In this situation, mea...
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The development of the energy storage industry and the higher electricity prices lead to the continuous increase of users' demand for battery energy storage in industrial manufacture. To monitor the status of the ...
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The Internet of Things identifier is the basic supporting technology to realize the precise interaction between things. With the advancement of the construction of the electric Internet of Things, the number of variou...
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In the data era, encrypted storage of files is a basic requirement for data security. Because most computing devices and storage devices lack data protection functions or their own data protection ability is poor, the...
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In multiple-relay wireless power transfer system, the system is usually in a state of detuning caused by the variation of resonance parameter with various factors. In order to solve this phenomenon, a dynamic tuning c...
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In multiple-relay wireless power transfer system, the system is usually in a state of detuning caused by the variation of resonance parameter with various factors. In order to solve this phenomenon, a dynamic tuning control method based on variable inductor is proposed in this paper. The variable inductance is connected in series at the transmitting coil end to adjust the system impedance so that achieves the purpose of reducing the loss and improving the output voltage gain of the system. Through simulation experiments, the effectiveness of the proposed variable inductor structure to improve the performance of the multiple-relay coil wireless power transmission system is verified.
Zero phase angle and constant current output characteristics of the system transmission loop have always been the basic transmission objectives of the wireless power supply system. In order to explore how to achieve t...
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Zero phase angle and constant current output characteristics of the system transmission loop have always been the basic transmission objectives of the wireless power supply system. In order to explore how to achieve this goal, this paper takes the five-coil multi-relay wireless power supply system as the research object, establishes the mathematical model of the system and deduces that the zero phase angle frequency of the transmitting loop is equal to the constant current frequency. Secondly, the resonant points of the system are simulated in MATLAB, and the sensitivity of the output current at each resonant point to the frequency change is analyzed to select the optimal operating frequency. Finally, a time-domain differential model was established in Simulink to verify the conclusion. When the frequency is 210.7kHz, the phase difference between the current and voltage of the transmitting loop is 0, and the system is least sensitive to frequency changes near this frequency point.
By blending elastomers, the mechanical properties of polypropylene can be effectively improved then meet the mechanical performance requirements of cable insulation materials. Common elastomer fillers are POE (Polyole...
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The comprehensive perception of substation equipment status is the precondition of ensuring safe operation and realizing intelligent patrol inspection of substation. With the development of digital powergrid, higher ...
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The electromagnetic energy is widely distributed in a voltage source converter (VSC) for HVDC and can be harvested as a self-powering source for wireless sensors. Electromagnetic energy with ultra-wideband distributio...
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With the development of the Industrial Internet of Things (IIoT) and the proposal of smart water conservancy, the integration of the Internet of Things (IoT), edge computing, and computer vision for hydrological infor...
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