Research on Electric Vehicle Electromagnetic Protection Considering Radiation of Two Wireless Chargers
Abstract
:1. Introduction
2. Establishment of Simulation Model
2.1. Global Model and Finite Element Discrete Model
2.2. MCR Wireless Charger Model
2.3. Car Body Model
2.4. Human Body Model
3. Analysis of Simulation Results
3.1. B Value of Wireless Charger A Working Alone and Two Wireless Chargers Working Simultaneously
3.2. Simulation Space B under Different Positions of Two Wireless Chargers
3.3. Influence of Different Car Body Materials
3.4. Electromagnetic Exposure of Driver’s Body under New Measures
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Parameters | Numerical Value |
---|---|
Ferrite plate size (length × width × height)/mm × mm × mm | 700 × 700 × 3 |
Air gap/mm | 190 |
Resonant frequency/kHz | 22 |
Transmitting power/kW | 21.88 |
Receiving power/kW | 21.62 |
Transmission efficiency (%) | 98.80 |
Car Body and Window | Relative Permittivity | Conductivity (S/m) | Relative Permeability |
---|---|---|---|
Aluminum alloy | 1.0 | 2.33 × 107 | 1 |
Low carbon steel | 1.0 | 8.41 × 106 | 150 |
Carbon fiber | 1.0 | 2.50 × 105 | 1 |
Glass | 5.5 | 1.0 | 1 |
Tissues | Relative Permittivity | Conductivity (S/m) |
---|---|---|
Cerebral white matter | 6.73 × 103 | 7.32 × 10−2 |
Cerebral gray matter | 1.09 × 104 | 1.21 × 10−1 |
Cerebrospinal Fluid | 1.09 × 102 | 2.00 × 100 |
Blood | 5.23 × 103 | 7.00 × 10−1 |
Muscle | 1.47 × 104 | 3.45 × 10−1 |
Bone | 5.47 × 102 | 3.55 × 10−2 |
Skin | 1.40 × 104 | 4.63 × 10−3 |
Different Positions | Two Chargers Work Simultaneously B (μT) | Charger A Works Alone B (μT) | Two Chargers Work Simultaneously/Charger A Works Alone (Multiple) |
---|---|---|---|
Simulation space | 2.93 × 106 | 2.05 × 105 | 143 |
The zx section | 5.95 × 105 | 2.63 × 105 | 2.24 |
The zy section | 3.04 × 101 | 2.35 × 101 | 1.29 |
Inside the car A | 1.57 × 103 | 1.21 × 103 | 1.30 |
Different Measures | Magnetic Induction Strength on Human Body Surface |B| (µT) | ICNIRP Exposure Limits |B| (µT) [25] | Percentage Values |
---|---|---|---|
No car body (the two chargers side by side) | 351 | 27 | 1300% |
Aluminum alloy car body (the two chargers side by side) | 0.84 | 27 | 3.11% |
Aluminum alloy car body (the two chargers are staggered) | 0.36 | 27 | 1.33% |
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Mou, W.; Lu, M. Research on Electric Vehicle Electromagnetic Protection Considering Radiation of Two Wireless Chargers. World Electr. Veh. J. 2022, 13, 95. https://doi.org/10.3390/wevj13060095
Mou W, Lu M. Research on Electric Vehicle Electromagnetic Protection Considering Radiation of Two Wireless Chargers. World Electric Vehicle Journal. 2022; 13(6):95. https://doi.org/10.3390/wevj13060095
Chicago/Turabian StyleMou, Wenting, and Mai Lu. 2022. "Research on Electric Vehicle Electromagnetic Protection Considering Radiation of Two Wireless Chargers" World Electric Vehicle Journal 13, no. 6: 95. https://doi.org/10.3390/wevj13060095