電力が充電ステーションから充電しようとする装置まで､電線を用いずに交流磁界によって伝送される（したがって無線と称される）。この技術は、電気歯ブラシによく用いられており、スマートフォンや電気自動車の分野で急速に進展している。現在のところ、2つの方式がある。
誘導型電力伝送（IPT）は、充電ステーション側の一次コイルで振動磁界を発生させる。この磁界が充電しようとする装置の二次コイルに流れ込み、コイルに交流電流を誘導する。この交流電流が整流器を通り、バッテリの再充電に使われる。
磁界共鳴結合（MRC）は、誘導型電力伝送のそれぞれのコイルにもう一つ共振回路を付け加えた拡張形である。高い効率と広い動作範囲がもたらされるが、電力制限が低くなるという損失がある。
よく知られた技術および規格に、Qi、Powermat、Rezence、WiTricityなどがある。
| 測定されている物理量 | 測定値 | 分類上の特徴 | 特記事項 |
|---|---|---|---|
| 電界強度 | 0.39 V/m (シミュレーション値) | 85 kHz | phatom is standing perpendicularly behind the vehicle on level with the reception coil; measures of the phantom: 117 cm, 20 kg; sending and receiving coils are aligned [1] |
| 電界強度 | 0.4 V/m (シミュレーション値) | - | phatom is standing perpendicularly behind the vehicle on level with the reception coil; measures of the phantom: 173 cm, 65 kg; sending and receiving coils are aligned [1] |
| 電界強度 | 0.5 V/m (シミュレーション値) | 85 kHz | phatom is standing perpendicularly behind the vehicle on level with the reception coil; measures of the phantom: 176 cm, 73 kg; sending and receiving coils are aligned [1] |
| 電界強度 | 0.6 V/m (シミュレーション値) | 85 kHz | phatom is standing perpendicularly behind the vehicle on level with the reception coil; measures of the phantom: 173 cm, 65 kg; sending and receiving coils are misaligned [1] |
| 電界強度 | 0.65 V/m (シミュレーション値) | 85 kHz | phatom is standing perpendicularly behind the vehicle on level with the reception coil; measures of the phantom: 117 cm, 20 kg; sending and receiving coils are misaligned [1] |
| 電界強度 | 0.8 V/m (シミュレーション値) | 85 kHz | phatom is standing perpendicularly behind the vehicle on level with the reception coil; measures of the phantom: 176 cm, 73 kg; sending and receiving coils are misaligned [1] |
| 電界強度 | 0.9 V/m (シミュレーション値) | 85 kHz | phatom is standing parallely behind the vehicle on level with the reception coil; measures of the phantom: 117 cm, 20 kg; sending and receiving coils are aligned [1] |
| 電界強度 | 0.95 V/m (シミュレーション値) | 85 kHz | phatom is standing parallely behind the vehicle on level with the reception coil; measures of the phantom: 173 cm, 65 kg; sending and receiving coils are aligned [1] |
| 電界強度 | 1.05 V/m (シミュレーション値) | 85 kHz | phatom is standing parallely behind the vehicle on level with the reception coil; measures of the phantom: 176 cm, 73 kg; sending and receiving coil are aligned [1] |
| 電界強度 | 1.25 V/m (シミュレーション値) | 85 kHz | phatom is standing parallely behind the vehicle on level with the reception coil; measures of the phantom: 117 cm, 20 kg; sending and receiving coils are misaligned [1] |
| 電界強度 | 1.3 V/m (測定値) | 85 kHz | phatom is standing parallely behind the vehicle on level with the reception coil; measures of the phantom: 173 cm, 65 kg; sending and receiving coils are misaligned [1] |
| 電界強度 | 1.6 V/m (シミュレーション値) | 85 kHz | phatom is standing parallely behind the vehicle on level with the reception coil; measures of the phantom: 176 cm, 73 kg; sending and receiving coils are misaligned [1] |
| 電界強度 | 2.4 V/m (平均値, シミュレーション値) | 85 kHz | peak value from three different body models, standing at the rear side, directly next to the bumper and looking to the car. Power: 7 kW. [2] |
| 電界強度 | 2.81 V/m (最大値, シミュレーション値) | 85 kHz | Charging system with 3.3 kW power of an electric vehicle with a battery voltage of 400 V. The value is simulated on the skin of an adult male who is lying on his side next to the car (worst case position). [3] |
| 電界強度 | 2.83 V/m (最大値, シミュレーション値) | 85 kHz | This peak value was simulated when the adult male model was lying besides the car model and has contact between his shoulder and the chassis of the car. Power: 7 kW. [4] |
| 電界強度 | 5.95 V/m (最大値, シミュレーション値) | 85 kHz | This peak value was simulated when the adult male model was lying besides the car model and holding his arm between the charging coils. Power: 7 kW. [4] |
| 磁束密度 | 1.98–0.03 µT (最大値, 測定値) | 20 kHz | Measured in 20 cm distance to the coachwork of a golf car which is charged with 1.14 kW. Measurement bandwidth: 9 kHz - 30 MHz. [5] |
| 磁束密度 | 2.48 µT (最大値, シミュレーション値) | 85 kHz | Charging system with 3.3 kW power of an electric vehicle with a battery voltage of 400 V. The value is simulated on the skin of an adult male who is lying on his side next to the car (worst case position). [3] |
| 磁束密度 | 4.84 µT (最大値, 測定値) | 30 kHz | charging system of a Renault Kangoo under a steel chassis. Measurement on the height of the secondary coil under the chassis. Power: 2 kW. [6] |
| 測定されている物理量 | 測定値 | 分類上の特徴 | 特記事項 |
|---|---|---|---|
| 電界強度 | 0.021 V/m (最大値, 測定値) | 90 kHz | measures at the location of the greatest maximum inside the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 電界強度 | 0.026 V/m (最大値, 測定値) | 70 kHz | at the location of the greatest maximum inside the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 電界強度 | 0.1 V/m (最大値, 測定値) | 30 kHz | at the location of the greatest maximum inside the bus; measures of the bus: 6.71 x 2.44 x 2.44; measures of the coil: 95.5 x 82.6 cm [7] |
| 電界強度 | 0.109 V/m (最大値, 測定値) | 50 kHz | at the location of the greatest maximum inside the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 電界強度 | 0.1892 V/m (測定値) | 20 kHz | measured at the back of the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coils: 95.9 x 82.6 cm [7] |
| 電界強度 | 0.1905 V/m (計算値) | 20 kHz | measured in front of the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coils: 95.5 cm x 82.6 cm [7] |
| 電界強度 | 0.196 V/m (測定値) | 20 kHz | measured at the left side of the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 電界強度 | 0.1985 V/m (測定値) | 20 kHz | measured on the right side of the bus at level of the coils; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 電界強度 | 0.2119 V/m (測定値) | 20 kHz | measured inside the bus above the coils; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coils: 95.5 x 82.6 cm [7] |
| 電界強度 | 0.545 V/m (最大値, 測定値) | 10 kHz | at the location of the greatest maximum inside the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 xm [7] |
| 磁束密度 | 0.0053 µT (最大値, 測定値) | 70 kHz | at the location of the greatest maximum inside the bus: measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 磁束密度 | 0.0081 µT (最大値, 測定値) | 30 kHz | at the location of the greatest maximum inside the bus; measures of the bus: 6.71 x 2.44 x 2.44; measures of the coil: 95.9 x 82.6 cm [7] |
| 磁束密度 | 0.0191 µT (測定値) | 20 kHz | measured at the left side of the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 磁束密度 | 0.0193 µT (測定値) | 20 kHz | measured in front of the bus; bus measures: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 磁束密度 | 0.0194 µT (測定値) | 20 kHz | measured inside the bus above the coils; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.9 x 82.6 cm [7] |
| 磁束密度 | 0.0195 µT (測定値) | 20 kHz | measured at the right side of the bus at level of the coils; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x .82.6 cm [7] |
| 磁束密度 | 0.0196 µT (測定値) | 20 kHz | measured behind the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.9 x 82.6 cm [7] |
| 磁束密度 | 0.03 µT (最大値, 測定値) | 90 kHz | at the location of the greatest maximum inside the bus: measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coil: 95.5 x 82.6 cm [7] |
| 磁束密度 | 0.23 µT (最大値, 測定値) | 50 kHz | at the location of the greatest maximum inside the bus; measures of the bus: 6.71 x 2.44 x 2.44 m [7] |
| 磁束密度 | 7.98 µT (最大値, 測定値) | 10 kHz | at location of the greatest maximum inside the bus; measures of the bus: 6.71 x 2.44 x 2.44 m; measures of the coils: 95.5 x 82.6 cm [7] |
| 測定されている物理量 | 測定値 | 分類上の特徴 | 特記事項 |
|---|---|---|---|
| 磁界強度 | 0.4 A/m (シミュレーション値) | 6.78 MHz | at a distance of 15 cm centrally over the mobile phone charging station; size of the station: 14.4 x 8 x 0.2 cm³; simulated for 1 W input power [8] |
| 磁界強度 | 1.2 A/m (シミュレーション値) | 6.78 MHz | at a distance of 5 cm centrally over the mobile phone charging station; size of the station: 14.4 x 8 x 0.2 cm³; simulated for 1 W input power [8] |
| 磁界強度 | 3.75 A/m (シミュレーション値) | 6.78 MHz | at a distance of 5 cm centrally over the mobile phone charging station; size of the station: 14.4 x 8 x 0.2 cm³; simulated for 1 W input power [8] |
| SAR | 30 mW/kg (最大値, シミュレーション値) | 6.78 MHz | a standing adult male backwards to a desk with a charging system. Averaged over 10 g tissue. Scaled to 1.34 A of operating current in the transmitter coils. [9] |
| SAR | 42 mW/kg (最大値, シミュレーション値) | 6.78 MHz | a sitting adult male in front of a desk with charging systems. Averaged over 10 g tissue. Scaled to 1.34 A of operating current in the transmitter coils. [9] |
| 測定されている物理量 | 測定値 | 分類上の特徴 | 特記事項 |
|---|---|---|---|
| 電界強度 | 4.5 mV/m | 140kHz | in situ field while charging at the hand; coils positioned at the chest of a body phanthom [10] |
| 電界強度 | 5.8 mV/m (シミュレーション値) | 140kHz | in situ field while charging at the forearm; coils positioned at the chest of a body phanthom [10] |
| 電界強度 | 9.9 mV/m (シミュレーション値) | 140kHz | in situ field while charging in the middle of the chest; coils positioned in front of the chest of a body phanthom [10] |
| 電界強度 | 25.2 mV/m (シミュレーション値) | 140kHz | in situ field between two charging cycles at the forearm; coils positioned at the chest of a body phanthom [10] |
| 電界強度 | 29.2 mV/m (シミュレーション値) | 140kHz | in situ field between two charging cycles at the hand; coils positioned at the chest of a body phanthom [10] |
| 電界強度 | 57.8 mV/m (シミュレーション値) | 140kHz | in situ field between two charging cycles in the middle of the chest; coils positioned in front of the chest of a body phanthom [10] |
| 磁束密度 | 4.1 µT (測定値) | 5 - 50 kHz | at a horizontal distance of 160 mm to the circular charger pad (diameter: 4.2 m) [11] |
| 磁束密度 | 5.6 µT (シミュレーション値) | 5 - 50 kHz | at a horizontal distance of 140 mm to the ciruclar charger pad (diameter: 4.2 m) [11] |
| 磁束密度 | 7.5 µT (シミュレーション値) | 5 - 50 kHz | at a horizontal distance of 120 mm to the circular charger pad (diameter: 4.2 m) [11] |
| 磁束密度 | 11.3 µT (シミュレーション値) | 5 - 50 kHz | at a horizontal distance of 100 m to the ciruclar charger pad (diameter: 4.2 m) [11] |
| 磁束密度 | 17.8 µT (測定値) | 5 - 50 kHz | at a horizontal distance of 80 mm to the circular charger pad (diameter: 4.2 m) [11] |
| 磁束密度 | 30.2 µT (シミュレーション値) | 5 - 50 kHz | at a horizontal distance of 60 mm to the circular charger pad (diamter: 4.2 m) [11] |
| 磁束密度 | 57 µT (シミュレーション値) | 5 - 50 kHz | at a horizontal distance of 40 mm to the ciruclar charger pad (diameter: 4.2 m) [11] |
| 磁束密度 | 131.3 µT (シミュレーション値) | 5 - 50 kHz | at a horizontal distance of 20 mm to the circular charger pad (diameter: 4.2 m) [11] |
| 磁束密度 | 317.5 µT (シミュレーション値) | 5 - 50 kHz | at the circular charger pad (diameter: 4.2 m) [11] |
| SAR | 0.35 nW/kg (シミュレーション値) | 140kHz | while charging at the hand, averaged over 10 g of tissue; coils positioned at the chest of a body phanthom [10] |
| SAR | 0.62 nW/kg (シミュレーション値) | 140kHz | while charging at the forearm, averaged over 10 g of tissue; coils positioned in front of the chest of a body phanthom [10] |
| SAR | 1.1 nW/kg (最大値, シミュレーション値) | 140kHz | while charging in the middle of the chest, averaged over 10 g of tissue; coils arranged in front of the the chest of the body phanthom [10] |
| SAR | 13.7 nW/kg (シミュレーション値) | 140kHz | between to charging cacles at the hand, averaged over 10 g of tissue; coils positioned at the chest of a body phanthom [10] |
| SAR | 24.9 nW/kg (シミュレーション値) | 140kHz | between to charging cycles at the forearm, averaged over 10 g of tissue; coils positioned in front of the chest of a body phanthom [10] |
| SAR | 41.5 nW/kg (シミュレーション値) | 140kHz | between two charging cycles in the middle of the chest, averaged over 10 g of tissue; coils arranged in front of the the chest of the body phanthom [10] |
| 測定されている物理量 | 測定値 | 分類上の特徴 | 特記事項 |
|---|---|---|---|
| 電界強度 | 18 mV/m (最大値, 計算値) | 100kHz | analytical and numerical value for center-to-center alignment of the coil; coil diameter: 2.5 m; normalized to 1 A [12] |
| 電界強度 | 46 mV/m (最大値, 計算値) | 100kHz | analytical and numerical value for Center-to-Center alignment of the coils; coil diameter: 1 m; normalized to 1 A [12] |
| 電界強度 | 95–96 mV/m (最大値, 計算値) | 100kHz | numerical and analytical value for center-to-center alignment of the coils; coil diamter: 0.25 m; normalized to 1 A [12] |
| 電界強度 | 96–97 mV/m (最大値, 計算値) | 100kHz | analytical and numerical value for center-to-center alignment of the coils, coil diameter: 0.5 m; normalized to 1 A [12] |
| 電界強度 | 180 mV/m (平均値, シミュレーション値) | 100kHz | vector-averaged value in a body phantom for a coil diameter of 0.25 m; normalized to 1 A [12] |
| 電界強度 | 180 mV/m (平均値, シミュレーション値) | 100kHz | vector-averaged value in a body phantom for a coil diameter of 2 m; normalized to 1 A [12] |
| 電界強度 | 190 mV/m (平均値, シミュレーション値) | 100kHz | vector-averaged value in a body phantom for a coil diameter of 1 m; normalized to 1 A [12] |
| 電界強度 | 300 mV/m (平均値, シミュレーション値) | 100kHz | vector-averaged value in a body phantom for a coil diameter of 0.5 m; normalized to 1 A [12] |
| 電界強度 | 380 mV/m (最大値, シミュレーション値) | 100kHz | maximum, vector-averaged value in a body phanthom for a coil diameter of 1 m; normalized to 1 A [12] |
| 電界強度 | 420 mV/m (最大値, シミュレーション値) | 100kHz | maximum, vector-averaged value in a body phanthom for a coil diameter of 2.5 m; normalized to 1 A [12] |
| 電界強度 | 500 mV/m (最大値, シミュレーション値) | 100kHz | maximum, vector-averaged value in a body phanthom for a coil diameter of 0.25 m; normalized to 1 A [12] |
| 電界強度 | 510 mV/m (最大値, シミュレーション値) | 100KHz | maximum, vector-averaged value in a body phanthom for a coil diameter of 0.5 m; normalized to 1 A [12] |
| SAR | 23 nW/kg (平均値, シミュレーション値) | 100kHz | whole body SAR for a body phantom for a coil diameter of 0.25 m; normalized to 1 A [12] |
| SAR | 32 nW/kg (平均値, シミュレーション値) | 100kHz | whole body SAR for a body phantom for a coil diameter of 2.5 m; normalized to 1 A [12] |
| SAR | 38 nW/kg (平均値, シミュレーション値) | 100kHz | whole body SAR for a body phantom for a coil diameter of 1 m; normalized to 1 A [12] |
| SAR | 71 nW/kg (平均値, シミュレーション値) | 100kHz | whole body SAR for a body phantom for a coil diameter of 0.5 m; normalized to 1 A [12] |
| SAR | 73 nW/kg (最大値, シミュレーション値) | 100kHz | whole body SAR for a body phantom for a coil diameter of 1 m; normalized to 1 A [12] |
| SAR | 77 nW/kg (最大値, シミュレーション値) | 100kHz | whole body SAR for a body phantom for a coil diameter of 2.5 m; normalized to 1 A [12] |
| SAR | 85 nW/kg (最大値, シミュレーション値) | 100kHz | whole body SAR for a body phantom for a coil diameter of 0.25 m; normalized to 1 A [12] |
| SAR | 120 nW/kg (最大値, シミュレーション値) | 100kHz | whole body SAR for a body phantom for a coil diameter of 0.5 m; normalized to 1 A [12] |
| SAR | 0.3 mW/kg (シミュレーション値) | 11.36 MHz | the model (height approc. 170 cm) is located centrally at a distance of 10 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 115 cm (thorax middle) [13] |
| SAR | 0.4 mW/kg (測定値) | 11.92 MHz | the model (height approc. 170 cm) is located centrally at a distance of 10 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 115 cm (thorax middle) [13] |
| SAR | 0.7 mW/kg (シミュレーション値) | 11.36 MHz | the model (height approc. 170 cm) is located centrally at a distance of 5 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 115 cm (thorax middle) [13] |
| SAR | 0.75 mW/kg (シミュレーション値) | 11.36 MHz | the model (height approx. 170 cm) is located centrally at a distance of 1 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 155 cm (at the height of the armpits) [13] |
| SAR | 1 mW/kg (シミュレーション値) | 11.92 MHz | the model (height approx. 170 cm) is located centrally at a distance of 1 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 155 cm (at the height of the armpits) [13] |
| SAR | 1 mW/kg (シミュレーション値) | 11.92 MHz | the model (height approc. 170 cm) is located centrally at a distance of 5 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 115 cm (thorax middle) [13] |
| SAR | 1.15 mW/kg (シミュレーション値) | 11.36 MHz | the model (height approx. 170 cm) is located centrally at a distance of 1 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 155 cm (at the height of the nose) [13] |
| SAR | 1.55 mW/kg (シミュレーション値) | 11.36 MHz | the model (height approx. 170 cm) is located centrally at a distance of 1 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 95 cm (at the height of the pelvis) [13] |
| SAR | 1.6 mW/kg (シミュレーション値) | 11.36 MHz | the model (height approx. 170 cm) is located centrally at a distance of 1 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 115 cm (thorax middle) [13] |
| SAR | 1.75 mW/kg (シミュレーション値) | 11.92 MHz | the model (height approx. 170 cm) is located centrally at a distance of 1 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 155 cm (at the height of the nose) [13] |
| SAR | 1.85 mW/kg (シミュレーション値) | 11.92 MHz | the model (height approx. 170 cm) is located centrally at a distance of 1 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 95 cm (at the height of the pelvis) [13] |
| SAR | 2.4 mW/kg (シミュレーション値) | 11.92 MHz | the model (height approc. 170 cm) is located centrally at a distance of 1 cm in front of the transmitting coils; the receiving coils are positioned at a distance of 13.5 cm to the left side; size of the coils: radius: 30.0 cm, width after winding: 20.0 mm, height of coil center (from ground): approx. 115 cm (thorax middle) [13] |
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