JP5543881B2 - Wireless power transmission device - Google Patents

Wireless power transmission device Download PDF

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JP5543881B2
JP5543881B2 JP2010208558A JP2010208558A JP5543881B2 JP 5543881 B2 JP5543881 B2 JP 5543881B2 JP 2010208558 A JP2010208558 A JP 2010208558A JP 2010208558 A JP2010208558 A JP 2010208558A JP 5543881 B2 JP5543881 B2 JP 5543881B2
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power transmission
impedance
transmission device
power
coil
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JP2012065477A (en
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晃久 松下
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株式会社東芝
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Description

Embodiments described herein relate generally to a wireless power transmission apparatus.

A technique for wirelessly transmitting power using a power transmitting coil and a power receiving coil has many conveniences such as no electrode exposure and no performance degradation due to wear, and safe transmission even in a humid environment. For this reason, in recent years, it has been adopted in many devices such as IC cards, mobile phones, electric toothbrushes, and shavers.

However, since the transmission characteristics vary greatly depending on the positional relationship between the power transmission coil and the power receiving coil, the positional relationship between the two coils is currently fixed using a cradle or the like, and the distance between the coils is about 0 to several centimeters. It is limited to transmission over very short distances.

  For example, a transformer is mounted on a printed board, and a capacitor and a resonance circuit are formed. The efficiency of power transmission is increased by driving the transformer with alternating current power at the resonance frequency. As described above, a method for improving the efficiency by resonating a capacitor or the like in addition to the coil has been used for some time.

JP 2004-274262 A

However, in the conventional invention, mounting is performed on a printed circuit board, and it is not considered to detect that a foreign object or a human body has entered between coils. For example, when a foreign substance enters between the coils, the frequency characteristic changes. However, in order to actually measure the frequency characteristic, the frequency must be continuously changed. However, if the output frequency is increased for a long time, the loss increases, so that the cooling device or the like becomes large and the device size increases. Furthermore, if it takes time to acquire the frequency characteristic, the detection of the abnormality is delayed accordingly.

The problem to be solved by the present invention is to provide a wireless power transmission device capable of detecting information about a coil by a simple method.

The wireless power transmission device according to the embodiment is connected to a high-frequency power source having a variable output frequency, a power transmission device connected to the high-frequency power source and configured to transmit power wirelessly and a power transmission coil, and a high-frequency power source. A frequency control unit that changes the operating frequency of the power transmission device, a power reception device that is configured to receive power transmitted from the power transmission device, a power reception device that includes a coil for power reception, and at least two discontinuous frequencies by the frequency control unit. An impedance detection unit that detects impedance at at least two frequencies by changing, and a coil state detection unit that detects the state of the coil based on the amount of change in impedance detected by the impedance detection unit .

The figure which shows the whole structure of the wireless power transmission apparatus of 1st Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 2nd Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 3rd Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 4th Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 5th Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 6th Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 7th Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 8th Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 9th Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 10th Embodiment. The figure which shows the whole structure of the wireless power transmission apparatus of 11th Embodiment.

Hereinafter, the transmission measure of the embodiment will be described with reference to the drawings.

(First embodiment)
The first embodiment will be described in detail with reference to the drawings. FIG. 1 is a diagram illustrating an overall configuration of the wireless power transmission device according to the first embodiment.

(Constitution)
First, the configuration of the first embodiment will be described. FIG. 1 shows a high frequency power source 1, a frequency control unit 2,
A resonance circuit 3 (a power transmission side resonance circuit 3a and a power reception side resonance circuit 3b), a power transmission coil 4, a power reception coil 5, an impedance detection device 6, a load 7, a power transmission device 20, and a power reception device 21 are configured.

  The high frequency power source 1 is connected to the frequency control unit 2, the impedance detection device 6, and the power receiving side resonance circuit 3b. The frequency control unit 2 is connected to the high frequency power source 1 and the impedance detection device 6. The power transmission side resonance circuit 3 a is connected to the high frequency power source 1 and the power transmission coil 4. The power receiving side resonance circuit 3 b is connected to the power receiving coil 5 and the load 7. The power transmission coil 4 is connected to the power transmission side resonance circuit 3a. The power receiving coil 5 is connected to the power receiving side resonance circuit 3b. The impedance detection device 6 is connected between the high frequency power source 1, the frequency control unit 2, and the high frequency power source 1 and the power transmission side resonance circuit 3a. The power transmission device 20 includes a power transmission side resonance circuit 3 a and a power transmission coil 4. The power receiving device 21 includes a power receiving side resonance circuit 3 b and a power receiving coil 5.

(Function)
The operation of this embodiment will be described below. The frequency control unit 2 determines the output frequency of the high frequency power source 1. High-frequency AC power determined by the frequency control unit 2 output from the high-frequency power source 1 is applied to the power transmission device 20 that transmits power wirelessly. The high-frequency AC power applied to the power transmission device 20 is applied to the power reception device 21. The load 7 is driven by supplying the applied high-frequency AC power to the load 7.

When the high frequency AC power is output from the high frequency power source 1 to the power transmission device 20, the impedance detection device 6 detects the impedance output from the high frequency power source 1. The impedance is determined by the coil inductance, capacitance, resistance value, and the like. The Q value representing the frequency characteristics of the coil is also determined by the inductance, capacitance, and resistance value. Normally, the Q values of the coils 4 and 7 of the power transmission device 20 and the power reception device 21 are very large. The Q value changes depending on the coil condition, foreign object insertion, and the like. However, in order to detect the Q value, it is necessary to obtain an accurate resonance frequency and search for a frequency that is half the vibration energy with respect to the vibration energy at that time. Therefore, in the present invention, impedance is detected by changing the frequency at two or more points. At this time, if the Q value is high, the change becomes large. On the other hand, when the Q value is low, the change is small. Thereby, the change of the Q value can be easily known. The impedance is determined by the coil inductance, capacitance, resistance value, and the like. For example, when the resistance value of the coil increases due to oxidation of the surface, the Q value decreases. Usually, the Q value of the coils of the power transmitting device 20 and the power receiving device 21 is very large, and the Q value varies depending on the coil condition, foreign object insertion, and the like. For example, when the resistance value of the coil increases due to oxidation of the surface, the Q value decreases. In order to detect such a Q value, it is necessary to obtain an accurate resonance frequency and search for a frequency that is half the vibration energy with respect to the vibration energy at that time. Usually, in order to detect such a Q value, it is necessary to continuously change the frequency in the vicinity of the resonance frequency of the power transmission coil 4, but in this embodiment, two or more arbitrary frequencies are changed, The frequency is used for impedance detection.

By using an arbitrary frequency of two or more points, a change in impedance becomes large when the Q value of the coil is high, and a result in which the change in impedance becomes small when the Q value is low is detected. Therefore, the change in the Q value can be easily detected by looking at the magnitude of the change in the impedance. From the impedance characteristics, it is possible to grasp the state of the coil by detecting a change in impedance. In addition, since it is not necessary to acquire characteristics by continuously changing the frequency, detection can be performed in a short time.

As described above, according to the present embodiment, it is possible to easily know the state of the coil from impedance changes at two or more arbitrary points.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Second Embodiment)
The second embodiment will be described in detail with reference to the drawings. FIG. 2 is a diagram illustrating an overall configuration of the wireless power transmission device according to the second embodiment. In addition, about the thing which has the same structure as FIG. 1, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Constitution)
In the first embodiment, the impedance detection device 6 is connected. In FIG. 2, this is changed to a current detection unit 8 and a current change amount detection unit 9.

(Function)
The operation of this embodiment will be described below. A constant voltage is output by the high frequency power source 1. Then, a current determined by the impedance of the resonance circuit 3, the power transmission coil 4, the power reception coil 5, and the load 7 flows from the high frequency power source 1. The frequency control unit 2 changes the frequency for two or more points for a short time, the current value at that time is detected by the current detection unit 8, and the change amount is detected by the current change amount detection unit 9. If the output of the high-frequency power supply 1 is a constant voltage condition, the detected amount of change in current represents a change in impedance. That is, the impedance can be measured by looking at the change in the current value and the phase of the output voltage and current. Further, by performing this measurement at at least two frequencies, the Q value can be known, and the change in the coil state can be easily seen.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Third embodiment)
The third embodiment will be described in detail with reference to the drawings. FIG. 3 is a diagram illustrating an overall configuration of the wireless power transmission device according to the third embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 2, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Constitution)
In the first embodiment, the impedance detection device 6 is connected. In FIG. 3, this is changed to a voltage detection unit 10 and a voltage change amount detection unit 11.

(Function)
The operation of this embodiment will be described below. A high-frequency power source 1 outputs a constant current. Then, a voltage determined by the impedance of the resonance circuit 3, the power transmission coil 4, the power reception coil 5, and the load 7 is generated. The frequency control unit 2 changes the frequency for two or more points for a short time, the voltage value at that time is detected by the voltage detection unit 10, and the change amount is detected by the voltage change amount detection unit 11. If the output of the high-frequency power source 1 is a constant current condition, the detected change in voltage represents a change in impedance. That is, the impedance can be measured by observing the change of the voltage value and the phase of the output current and the voltage. Further, by performing this measurement at at least two frequencies, the Q value can be known, and the change in the coil state can be easily seen.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Fourth embodiment)
The fourth embodiment will be described in detail with reference to the drawings. FIG. 4 is a diagram illustrating an overall configuration of the wireless power transmission device according to the fourth embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 3, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Constitution)
In the first embodiment, the impedance detection device 6 is connected to the power transmission side. In FIG. 4, this is changed to the power receiving side.

(Function)
The operation of this embodiment will be described below. The high frequency power source 1 outputs high frequency power and transmits the power via the resonance circuit 3 and the power transmission coil 4. The power receiving coil 5 and the resonance circuit 3 receive the magnetic energy sent from the transmitting side and obtain electric power. At this time, the frequency characteristics change depending on the state of the power receiving coil 5 as in the power transmission side. For this reason, the state of a coil can be easily known by measuring impedance with at least two frequencies. Although the frequency can be detected from the measured waveform, there is no problem even if wireless communication is performed between power transmission and reception.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Fifth embodiment)
The fifth embodiment will be described in detail with reference to the drawings. FIG. 5 is a diagram illustrating an overall configuration of the wireless power transmission device according to the fifth embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 4, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Constitution)
In the first embodiment, the impedance detection device 6 is connected. In FIG. 5, this is changed to a current detection unit 8 and a current change amount detection unit 9.

(Function)
The operation of this embodiment will be described below. A constant voltage is output by the high frequency power source 1. Then, the high frequency power source 1 passes a current determined by the impedance of the resonance circuit 3, the power transmission coil 4, the power reception coil 5, and the load 7. The power receiving coil 5 and the resonance circuit 3 receive the magnetic energy to obtain electric power. At this time, a voltage and current corresponding to the coil characteristics are generated on the power receiving side. Further, the frequency characteristic changes depending on the state of the power receiving coil 5. For this reason, even if a constant voltage is applied to the power receiving side, the impedance becomes high and no current flows. In order to detect this, it is possible to easily know the state of the coil even on the power receiving side by measuring the impedance at at least two frequencies.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Sixth embodiment)
The sixth embodiment will be described in detail with reference to the drawings. FIG. 6 is a diagram illustrating an overall configuration of a wireless power transmission device according to the sixth embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 5, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Constitution)
In the first embodiment, the impedance detection device 6 is connected. In FIG. 6, this is changed to a voltage detection unit 10 and a voltage change amount detection unit 11.

(Function)
The operation of this embodiment will be described below. A high-frequency power source 1 outputs a constant current. Then, a voltage determined by the impedance of the resonance circuit 3, the power transmission coil 4, the power reception coil 5, and the load 7 is generated. The power receiving coil 5 and the resonance circuit 3 receive the magnetic energy to obtain electric power. At this time, a voltage and current corresponding to the coil characteristics are generated on the power receiving side. Further, the frequency characteristic changes depending on the state of the power receiving coil 5. For this reason, the state of a coil can be easily known by measuring impedance with at least two frequencies.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Seventh embodiment)
The seventh embodiment will be described in detail with reference to the drawings. FIG. 7 is a diagram illustrating an overall configuration of a wireless power transmission device according to the seventh embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 6, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Constitution)
In the first embodiment, the impedance detection device 6 is connected. In FIG. 7, a temperature detection unit 12 is added to the resonance circuit 3.

(Function)
The operation of this embodiment will be described below. The power transmission coil 4 and the resonance circuit 3 can be resonated to realize wireless power transmission with high efficiency. This resonance is influenced by the inductance, capacitance, resistance value, etc. of the power transmission coil 4 and the resonance circuit 3. Here, the characteristics of the capacitor change with temperature. For this reason, even if an impedance change is detected, it cannot be distinguished whether it is an influence of the power transmission coil 4 and the resonance circuit 3 or an external influence. Therefore, by acquiring the temperature characteristics of the capacitor in advance and using the characteristics, it is possible to eliminate the influence of the temperature characteristics of the capacitor. In FIG. 7, the configuration of claim 1 is used, but any change in impedance or the like is not a problem in any of claims 1 to 5. In addition, the influence of the capacitor can be similarly excluded regardless of whether the temperature is on the power receiving device side or the power transmitting device side.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Eighth embodiment)
The eighth embodiment will be described in detail with reference to the drawings. FIG. 8 is a diagram illustrating an overall configuration of a wireless power transmission device according to the eighth embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 7, the same sign is attached | subjected and description is abbreviate | omitted.

(Constitution)
In FIG. 8, a recording device 13 is added to the impedance detection device 6.

(Function)
The operation of this embodiment will be described below. The impedance changes depending on the state of the coil. For example, when the coil is oxidized, the resistance component increases. Also, the capacitance changes as the coil position changes. Such a change may occur in a short time due to a mechanical shock, or may occur due to long-term deterioration. Therefore, by recording the amount of change in impedance or voltage under a certain condition such as no load, the tendency of change due to deterioration over a long time can be known. As a result, the lifetime can be estimated. That is, life diagnosis can be performed from impedance changes at two or more arbitrary points.

It should be noted that there is no problem even if not only the impedance but also the voltage change amount and the current change amount are recorded. Moreover, it is possible not only on the power transmission side but also on the power reception side.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Ninth embodiment)
The ninth embodiment will be described in detail with reference to the drawings. FIG. 9 is a diagram illustrating an overall configuration of a wireless power transmission device according to the ninth embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 8, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Constitution)
In FIG. 9, a theft detection device 14 is added to the impedance detection device 6.

(Function)
The operation of this embodiment will be described below. When the power receiving side increases from one state to two and both try to receive power, the resistance component changes when viewed from the power transmitting side. Therefore, if the voltage of the high frequency power source 1 is the same, when the number of power receiving sides is increased to two, the phase of the voltage and current of the high frequency power source does not change, and the magnitude of the current changes. Further, if the coil characteristics are the same, the resonance frequency has not changed. Therefore, by measuring the impedance at at least two frequencies, this change can be detected, and theft can be detected. That is, it is possible to detect theft from the impedance change at any two or more points. There is no problem even if the voltage change amount and the current change amount are used not only for impedance but also for the detection of theft. Moreover, it is possible not only on the power transmission side but also on the power reception side.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Tenth embodiment)
The tenth embodiment will be described in detail with reference to the drawings. FIG. 10 is a diagram illustrating an overall configuration of a wireless power transmission device according to the tenth embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 9, the same sign is attached | subjected and description is abbreviate | omitted.

(Constitution)
In FIG. 10, a foreign object detection device 15 is added to the impedance detection device 6.

(Function)
The operation of this embodiment will be described below. When a foreign object enters between the power transmission coil 4 and the power reception coil 5, the overall inductance, capacitance, and resistance components change. For this reason, the resonance frequency and the Q value change. Here, it can be seen that if the imaginary part of the impedance is positive, the frequency is higher than the resonance frequency, and if the imaginary part is negative, the frequency is lower than the resonance frequency. That is, it is possible to easily detect whether the frequency at the time of impedance detection is higher or lower than the resonance frequency. Further, as described above, the change in the Q value can be known from the change in the impedance. By using this, for example, when a person enters between the coils, the capacitance increases. For this reason, the resonance frequency is lowered and the Q value is also lowered. Conversely, it is possible to detect that a person has entered by detecting that the resonance frequency has decreased and that the Q value has decreased. Similarly, even a metal or the like can be detected by the same method. That is, foreign matter detection is possible from impedance changes at two or more arbitrary points. It should be noted that there is no problem even if the amount of voltage change or current change is used not only for impedance but also for detecting foreign matter (effect).
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

(Eleventh embodiment)
The eleventh embodiment will be described in detail with reference to the drawings. FIG. 11 is a diagram illustrating the overall configuration of the wireless power transmission device according to the eleventh embodiment. In addition, about the thing which has the same structure as FIG. 1 thru | or 10, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Constitution)
In FIG. 11, a load condition detection device 16 is added to the impedance detection device 6.

(Function)
The operation of this embodiment will be described below. When the load changes from no load to load, the resistance component changes and a large current needs to flow. When the resistance component changes, the Q value changes. Therefore, it becomes possible to know the state of the load from the impedance change at any two or more points on the power transmission side. That is, it becomes possible to detect the load status from impedance changes at two or more arbitrary points. It should be noted that there is no problem even if the load state detection uses not only the impedance but also the voltage change amount and the current change amount.

(effect)
According to the wireless power transmission device of at least one embodiment described above, it is possible to provide a wireless power transmission device that can detect information about a coil by a simple method.

DESCRIPTION OF SYMBOLS 1 High frequency power supply 2 Frequency control part 3 Resonance circuit 3a Power transmission side resonance circuit 3b Power reception side resonance circuit 4 Power transmission coil 5 Power reception coil 6 Impedance detection device 7 Load 8 Current detection part 9 Current variation detection part 10 Voltage detection part 11 Voltage Change detection unit 12 Temperature detection unit 13 Recording device 14 Theft detection device 15 Foreign object detection device 16 Load condition detection device 20 Power transmission device 21 Power reception device

Claims (11)

  1. A high frequency power source with variable output frequency;
    A power transmission device connected to the high-frequency power source and composed of a power transmission side resonance circuit that wirelessly transmits power and a power transmission coil;
    A frequency control unit that is connected to the high-frequency power source and changes an operating frequency of the power transmission device;
    A power receiving device comprising a power receiving side resonance circuit and a power receiving coil for receiving the power transmitted from the power transmitting device;
    An impedance detection unit configured to detect impedance at at least two frequencies by changing the frequency control unit to at least two discontinuous frequencies ;
    A wireless power transmission apparatus, comprising: a coil state detection unit that detects a state of the coil based on an amount of change in impedance detected by the impedance detection unit .
  2. The wireless power transmission device according to claim 1 , wherein the impedance detection unit includes a detection unit that detects an output voltage change amount of the power transmission device , and measures impedance based on the output voltage change amount .
  3. The wireless power transmission device according to claim 1 , wherein the impedance detection unit includes a detection unit that detects an output current change amount of the power transmission device , and measures an impedance based on the output current change amount .
  4. The wireless power transmission device according to claim 1, wherein the impedance detection unit includes a detection unit that detects an input voltage change amount of the power receiving device, and measures an impedance based on the input voltage change amount.
  5. The impedance detection unit includes a detection unit that detects an input current change amount of the power receiving device. The wireless power transmission apparatus according to claim 1, wherein impedance is measured based on the input current change amount.
  6. The wireless power transmission device according to any one of claims 1 to 5, further comprising a temperature detection unit that measures a temperature of at least one of the power transmission device or the power reception device.
  7. The wireless power transmission device according to claim 1, further comprising a recording device that records the impedance.
  8. The wireless power transmission device according to any one of claims 1 to 6, further comprising a theft detection device that detects theft based on the impedance.
  9. The wireless power transmission device according to any one of claims 1 to 6, further comprising a foreign matter detection device that detects foreign matter between the power transmission device and the power reception device based on the impedance.
  10. The wireless power transmission device according to any one of claims 1 to 6, further comprising a load detection device that detects a load state based on the impedance.
  11. A high frequency power source with variable output frequency;
    A power transmission device connected to the high-frequency power source and composed of a power transmission side resonance circuit that wirelessly transmits power and a power transmission coil;
    A frequency control unit that is connected to the high-frequency power source and changes an operating frequency of the power transmission device;
    A power receiving device comprising a power receiving side resonance circuit and a power receiving coil for receiving the power transmitted from the power transmitting device;
    An impedance detection unit configured to detect impedance at at least two frequencies by changing the frequency control unit to at least two discontinuous frequencies;
    A foreign matter detection device for detecting foreign matter between the power transmission coil of the power transmission device and the power reception coil of the power reception device, based on the amount of change in impedance detected by the impedance detection unit;
    A wireless power transmission device.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104377839A (en) * 2014-11-06 2015-02-25 西安交通大学 Multi-loop control method for magnetic resonance coupling wireless power transmission system

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5071574B1 (en) * 2011-07-05 2012-11-14 ソニー株式会社 Sensing device, power receiving device, non-contact power transmission system, and sensing method
JP5840886B2 (en) 2011-07-25 2016-01-06 ソニー株式会社 Detection device, power reception device, power transmission device, non-contact power transmission system, and detection method
WO2013145281A1 (en) * 2012-03-30 2013-10-03 パイオニア株式会社 Power-theft detection device and method for detecting power theft
JP5884610B2 (en) * 2012-04-10 2016-03-15 ソニー株式会社 Power receiving device, power receiving device control method, and power feeding system
JP5976385B2 (en) 2012-05-07 2016-08-23 ソニー株式会社 Detecting device, power receiving device, power transmitting device, and non-contact power feeding system
JP5915904B2 (en) * 2012-06-22 2016-05-11 ソニー株式会社 Processing apparatus, processing method, and program
JP5904517B2 (en) 2012-07-11 2016-04-13 パイオニア株式会社 Stealing inspection apparatus and method, computer program, and recording medium
JP6202854B2 (en) * 2013-03-29 2017-09-27 キヤノン株式会社 Power supply device
KR20160022823A (en) 2013-06-19 2016-03-02 르네사스 일렉트로닉스 가부시키가이샤 Power transmission device, wireless power feeding system, and control method
JP2015012746A (en) * 2013-07-01 2015-01-19 パナソニックIpマネジメント株式会社 Power feeding apparatus and power feeding method
JP2015012748A (en) * 2013-07-01 2015-01-19 パナソニックIpマネジメント株式会社 Power feeding apparatus and frequency characteristic acquisition method
JP6249205B2 (en) * 2013-07-01 2017-12-20 パナソニックIpマネジメント株式会社 Power feeding device and method for controlling power feeding device
WO2015033860A1 (en) * 2013-09-04 2015-03-12 株式会社村田製作所 Power transmission device, wireless power transmission system, and power transmission discrimination method
US10355511B2 (en) 2013-11-01 2019-07-16 Panasonic Intellectual Property Management Co., Ltd. Mobile-terminal charging device and vehicle equipped with same
CN103904784A (en) * 2014-03-31 2014-07-02 南京信息工程大学 Electric energy wireless wall-penetrating transmission device
CN104467989B (en) * 2014-12-25 2017-03-15 东南大学 A kind of radio energy transmission system receiving terminal detection method of self-identifying load
JP6466557B2 (en) * 2017-12-20 2019-02-06 ソニー株式会社 Detection device and power transmission device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7989986B2 (en) * 2006-03-23 2011-08-02 Access Business Group International Llc Inductive power supply with device identification
JP4893689B2 (en) * 2008-05-09 2012-03-07 セイコーエプソン株式会社 Power receiving device, electronic device, non-contact power transmission system, and power transmitting device
JP2010136464A (en) * 2008-12-02 2010-06-17 Casio Computer Co Ltd Power transmitter and power transmission method
JP5585098B2 (en) * 2009-03-06 2014-09-10 日産自動車株式会社 Non-contact power supply apparatus and method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104377839A (en) * 2014-11-06 2015-02-25 西安交通大学 Multi-loop control method for magnetic resonance coupling wireless power transmission system
CN104377839B (en) * 2014-11-06 2016-08-03 西安交通大学 The multiple feedback loop method of magnetic resonance coupling Wireless power transmission system

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