Reverse-Bent Modular Coil Structure with Enhanced Output Stability in DWPT for Arbitrary Linear Transport Systems

Area of Science:

• Electrical Engineering
• Power Electronics
• Wireless Power Transfer

Background:

• Dynamic wireless power transfer (DWPT) systems often face output voltage fluctuations due to segmented transmitter designs.
• Existing coil structures for mitigating these pulsations are complex and limited by specific operating conditions like air gap variations.

Purpose of the Study:

• To propose a novel reverse-bent modular transmitter structure for DWPT systems in industrial automation.
• To address the challenges of output pulsations and complex parameter design in current DWPT technologies.

Main Methods:

• A novel reverse-bent modular transmitter coil structure was designed to mitigate magnetic field drops caused by heterogeneous current density.
• The coil terminals were reversely bent towards the ferrite layer for shielding, aiming to create a uniform magnetic field.
• A 100 W laboratory prototype was constructed to validate the proposed structure's performance.

Main Results:

• The proposed structure achieved a constant output voltage with pulsations within ±2.3% during dynamic operation.
• An average efficiency of 88.29% was recorded at a 200 mm transfer distance.
• Constant voltage output was maintained even when the air gap varied between 20 mm and 30 mm.

Conclusions:

• The reverse-bent modular transmitter structure effectively overcomes output pulsations in DWPT systems.
• This design offers a robust solution for stable power delivery in industrial linear transport systems.
• The proposed structure demonstrates superior performance in maintaining consistent voltage output across varying air gaps.