Analysis on the Effect of DC Current Changes on the Magnetic Field of Wireless Power Transfer

• Published in: 2023 IEEE 14th Control and System Graduate Research Colloquium (ICSGRC) pp. 186 - 191
• Main Authors: Irwanto, M., Ali, M. Badruzzaman, Nugraha, Y. T., Ismail, B., Nisja, I., Leow, W.Z.
• Format: Conference Proceeding
• Language: English
• Published: IEEE 05-08-2023
• Subjects: half-bridge inverter; Inductance; magnetic field; mutual inductance; Receivers; Resistors; Simulation; transmitter and receiver coil; Transmitters; Voltage; Wireless power transfer; Wireless power transfer (WPT)
• ISSN: 2833-1028
• DOI: 10.1109/ICSGRC57744.2023.10215406

The generation of electromagnetic radiation in a solenoid, driven by alternating current (AC) voltage, is directly influenced by the voltage and current flowing through the solenoid. Exploiting this concept, wireless power transfer (WPT) systems can be developed. These systems consist of a sending coil and a receiving coil, both equipped with solenoids. The sending coil is connected to a half bridge circuit to generate AC voltage, which is then transmitted to the receiver coil. In this study, the effects of various factors on the performance of the wireless power transfer system were investigated, with a particular focus on the impact of DC voltage and input DC current. To examine these effects, an experimental setup was employed where the transmitter and receiver coils were powered by a DC voltage source. By varying the voltage and current parameters, the study aimed to analyze their influence on the wireless power transfer process. The simulation results show that 100 V and 150 V of DC current will produce 36.54 A and 54.8 A of input DC current respectively with constant resistor 7.54×10 −2 Ω. The result shows that the input DC current is directly proportional with the magnetic field, AC current at sending and receiving coil, voltage at sending and receiving coil and AC power at receiving coil. Increasing the input DC current will increase the magnetic field, AC current at sending coil and receiver coil, voltage at transmitter coil and receiving coil and AC power at receiving coil and vice versa.