Design Considerations of Capacitive Power Transfer Systems

Mahdi, Hussein; Hattori, Reiji; Hoff, Bjarte; Uezu, Anyu; Akiyoshi, Kazunari

doi:10.1109/access.2023.3283908

Cited by 4 publications

(2 citation statements)

References 68 publications

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“…The capacitors C p and C s are defined as primary capacitor and secondary capacitor, respectively. The voltage-controlled current sources I p and I s can be expressed as ( 1) and (2).…”

Section: Circuit Analysismentioning

confidence: 99%

Primary side control technique for capacitive power transfer system without any wireless feedback

Nutwong,

Hatchavanich,

Sangswang

et al. 2024

IJPEDS

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The output voltage of capacitive power transfer (CPT) system will change if the load resistance is varied. This paper presents a method to regulate the output voltage using a controller that is located on the primary side, known as the primary side control technique. It does not require any additional components and wireless feedback, which lowers the cost and complexity of CPT system compared to the conventional control technique. Instead of directly measuring the output voltage on secondary side, it is estimated through the measured capacitor voltage on primary side. Modified sine wave control of the full-bridge inverter is adopted to regulate the output voltage. The proposed control technique is validated by the simulation via PSIM software using the practical parameters of capacitive coupler presented in the literature. Simulation results of the output voltage control against the step change in desired output voltage and load resistance indicate the performance of proposed control technique.

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“…The capacitors C p and C s are defined as primary capacitor and secondary capacitor, respectively. The voltage-controlled current sources I p and I s can be expressed as ( 1) and (2).…”

Section: Circuit Analysismentioning

confidence: 99%

Primary side control technique for capacitive power transfer system without any wireless feedback

Nutwong,

Hatchavanich,

Sangswang

et al. 2024

IJPEDS

View full text Add to dashboard Cite

show abstract

“…CPT is similar to the IPT system by using an aluminum plate as a single capacitor. However, unlike magnetic induction, which can increase inductance values when manufactured in flat plate form, CPT requires high-frequency operation (hundreds of kHz to several MHz) [22][23][24]. Therefore, considering the specifications in Table 1 and the preceding discussion, the IPT method was selected for the proposed power supply.…”

Section: Description Of Wireless Power Transfer System Type and Selec...mentioning

confidence: 99%

Design of Power Supply Based on Inductive Power Transfer System for Medium Voltage Direct Current Sensor

Jo,

Li,

Kim

et al. 2023

Electronics

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This paper proposes a medium voltage direct current (MVDC) sensor power supply method based on inductive power transfer (IPT). Given that MVDC distribution networks transmit power at high voltages (several tens of kV), control through sensors is necessary to prevent exacerbating MVDC distribution network accidents. Moreover, these high voltages in MVDC distribution networks mean that high voltage insulation is required between the sensor and the distribution line and for any power supply device electrically connected to the sensor. Therefore, this paper proposes a safe and reliable power supply method using the principle of IPT to maintain a suitable insulation distance between the distribution network and the current sensor supply line. After proposing and designing a transmitter/receiver pad and IPT system by considering the current sensor specifications, a 50-W experimental prototype is developed. The experiments demonstrated that the proposed IPT system can resolve concerns about the breakdown of insulation between distribution networks and power supply lines.

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A 1 kW, 76% efficiency underwater single‐capacitor coupled WPT system with a 1 m separation distance single‐capacitor coupled

Nie,

Da,

et al. 2024

Circuit Theory & Apps

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In this paper, an underwater single‐capacitor coupled wireless power transmission (USCC‐WPT) system is proposed, which operates at 200 kHz and can transmit 1 kW of power at 1 m in seawater with an efficiency of 76%. The USCC‐WPT system produces no eddy current losses in seawater, and the distance is increased compared to conventional inductive power transfer systems. The system proposed in this paper has a wide range of applications underwater. The load‐independent constant voltage (CV) output and misalignment tolerance properties of the USCC‐WPT system are analyzed and validated by an equivalent circuit model constructed from the stray capacitance. The 1 kW prototype demonstrates the feasibility of the USCC‐WPT system proposed in this paper, while the system can work properly with 50 cm misalignment.

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Design Considerations of Capacitive Power Transfer Systems

Cited by 4 publications

References 68 publications

Primary side control technique for capacitive power transfer system without any wireless feedback

Primary side control technique for capacitive power transfer system without any wireless feedback

Design of Power Supply Based on Inductive Power Transfer System for Medium Voltage Direct Current Sensor

A 1 kW, 76% efficiency underwater single‐capacitor coupled WPT system with a 1 m separation distance single‐capacitor coupled

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