Application Cases

Experiment Name: Capacitively Coupled Wireless Power Transfer System Considering Grounding Conditions

Research Direction: Wireless Power Transfer

Experiment Content: Under fixed circuit parameters of the system, the grounding conditions of the four metal plates were modified to observe changes in system output performance, specifically:

1. The relationship between output load voltage and load resistance under different grounding modes.

2. The relationship between load output voltage and the ground capacitance of the ungrounded metal plates under a specific grounding mode.

Test Objective: To verify the correctness of theoretical analysis and simulation results.

Test Equipment:
Signal generator (Agilent 33220A), power amplifier (Aigtek ATA-122D), four 300 mm × 300 mm aluminum plates, various resistors.

Experimental Procedure:

The experimental platform for the capacitively coupled wireless power transfer system is shown in the figure below. The setup includes:

• A signal generator (Agilent 33220A) to produce a high-frequency signal source.

• A broadband power amplifier (Aigtek ATA-122D) to amplify the signal from the generator.

• Two pairs of aluminum plates (300 mm × 300 mm) and several resistors (0.5 kΩ, 1 kΩ, 2 kΩ).
  The vertical distance between Plate 1 and Plate 3 is 10 mm, and the horizontal distance between Plate 1 and Plate 2 is 100 mm. In the experiment, Plates 1 and 2 are connected to the output of the power amplifier, while Plates 3 and 4 are connected to resistors. The voltage between Plates 1 and 2 is set to 20 Vrms at 1 MHz.
  To avoid direct grounding of any metal plate through the measurement equipment, both the signal generator and the power amplifier are powered by isolation transformers. Additionally, a handheld oscilloscope (Keysight U1620A) is used during the experiment. When required, the metal plates are grounded via wires connected to the ground line from the power outlet.

  
  

The experimental materials presented in this document have been compiled and published by Xi'an Aigtek Electronics. For more experimental solutions, please continue to follow the Aigtek official website. Aigtek is a high-tech enterprise in China specializing in the research, development, production, and sales of testing instruments, focusing on products such as power amplifiers, power signal sources, power amplifier modules, and metrological calibration sources.