JP7364876B2 - Power supply control system and electrical equipment terminal - Google Patents

Description

The present invention provides a power supply control system including a power supply system including a first magnetic field generator whose resonance point is a first frequency and a second magnetic field generator whose resonance point is a second frequency; The present invention relates to an electrical equipment terminal used in the above power supply system.

Conventionally, when controlling the power supply of various devices using magnetic field resonance, if the distance between the receiving side and the transmitting side becomes large, the electromotive force that can be extracted becomes a weak voltage. It has been considered difficult to boost a weak voltage to a voltage (for example, 1V or higher) at which the device can be activated. For this reason, in systems that utilize magnetic fields, it is necessary to keep the receiving and transmitting devices extremely close to each other.

Furthermore, when the distance between the receiving side and the transmitting side is close, there is a problem in that the electromotive force increases excessively. As a result, there is a possibility that the target terminal may malfunction or that users may be affected by abnormal heat generation. Although the above problem can be solved by adjusting the resonant frequency, there is a problem in that the hardware becomes redundant because a mechanism for adjusting the parameters of the passive elements in the resonant circuit must be implemented.

Patent Document 1 discloses a magnetic power generation device. This invention does not specifically mention properly supplying power. Although Patent Document 2 also discloses a magnetic power generation device, the purpose thereof is to improve the S/N ratio.

Japanese Patent Application Publication No. 2018-112971 Japanese Unexamined Patent Publication No. 55-139065

As mentioned above, in conventional magnetic power generation, there was no consideration of appropriate supply of electric power. An object of the embodiments of the present invention is to provide a power supply control system and an electrical equipment terminal that can appropriately supply power to the electrical equipment when the electrical equipment needs to operate.

The power supply control system according to the embodiment includes a first magnetic field generating device that generates an electric field of a first intensity with a first frequency as a resonance point centered at a predetermined position where the intensity of the generated magnetic field is maximum; a second magnetic field generating device that generates an electric field of a second intensity with a second frequency as a resonance point centered on the predetermined position where the intensity of the generated magnetic field is maximum ;
It is sensitive to a frequency band of a predetermined width centered on a frequency at the midpoint between the first frequency and the second frequency, and has a frequency range from the center where the strength of the magnetic field generated by the first magnetic field generating device is maximum. the first radius from the center where the electric field by the first magnetic field generating device and the second magnetic field generating device and the magnetic field generated by the second magnetic field generating device in an area with a radius of 1 are maximum; Electricity can be generated by the electric field generated by the first magnetic field generator and the second magnetic field generator in an area with a shorter second radius, and the first magnetic field generator in an area with a radius exceeding around the first radius. A power generating element that cannot generate electricity due to the electric field generated by the magnetic field generator and the second magnetic field generator , and an electrical equipment main body that performs a predetermined function and/or a predetermined process and receives power supply. a step-up circuit that boosts the voltage generated by the power generation element by the electric field generated by the first magnetic field generation device and the second magnetic field generation device to the operating voltage of the electrical equipment main body; an electrical equipment terminal comprising: a power supply control unit that turns on power supply from the booster circuit to the electrical equipment main body when power is generated by detecting a magnetic field; It is characterized by

FIG. 1 is a configuration diagram of a power supply control system according to a first embodiment of the present invention. FIG. 3 is a diagram showing a sensitivity region of a power generation element used by the power supply control system according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating a boosting operation of a boosting circuit used in the power supply control system according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating a boosting operation of a boosting circuit used in the power supply control system according to the first embodiment of the present invention in an area of a predetermined magnetic field environment. FIG. 2 is a diagram illustrating a boosting operation of the boosting circuit used in the power supply control system according to the first embodiment of the present invention under control by a boosting control unit. FIG. 3 is a diagram illustrating a magnetic field monitoring operation used by the power supply control system according to the first embodiment of the present invention. 1 is a flowchart for explaining operations performed in the power supply control system according to the first embodiment of the present invention. FIG. 3 is a diagram illustrating a first example of changes in the magnetic field environment at a place where the power supply control system according to the first embodiment of the present invention is turned on. FIG. 6 is a diagram illustrating a second example of changes in the magnetic field environment at a place where the power supply control system according to the first embodiment of the present invention is turned on; FIG. 2 is a configuration diagram of an electrical equipment terminal according to a second embodiment of the present invention. FIG. 2 is a configuration diagram of an authentication device included in an electrical equipment terminal according to a second embodiment of the present invention. 7 is a flowchart for explaining the operation of the electrical equipment terminal according to the second embodiment of the present invention. FIG. 7 is a configuration diagram of an authentication device included in an electrical equipment terminal according to a third embodiment of the present invention. 7 is a flowchart for explaining the operation of the electrical equipment terminal according to the third embodiment of the present invention. FIG. 7 is a configuration diagram of an authentication device included in an electrical equipment terminal according to a third embodiment of the present invention. 7 is a flowchart for explaining the operation of the electrical equipment terminal according to the fourth embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A power supply control system and an electrical equipment terminal according to embodiments of the present invention will be described below with reference to the accompanying drawings. In each figure, the same components are given the same reference numerals and redundant explanations will be omitted. FIG. 1 shows a configuration diagram of a power supply control system according to a first embodiment of the present invention. The power supply control system according to this embodiment includes a power supply system 500 and an electrical equipment terminal 100. The power supply system 500 includes a first magnetic field generating device 501 whose resonance point is a first frequency, and a second magnetic field generating device 502 whose resonance point is a second frequency. Together with the first magnetic field generating device 501 and the second magnetic field generating device 502, it generates a magnetic field, and is provided on the ground of area A11 in, for example, a circular area A11 and an area A12 at the center of area A11. Although there is no limit to the size of area A11 and area A12, power generation is also possible in area A11 by the magnetic fields of the first magnetic field generating device 501 and the second magnetic field generating device 502. Note that area A11 and area A12 may exist inside a building or may exist outdoors.

Although the electrical equipment terminal 100 is held in the hand of the person P in FIG. 1, the electrical equipment terminal 100 is not limited to being portable and has an electrical equipment main body 110 that performs predetermined functions and/or predetermined processing. The electrical device main body 110 can be a device that operates on an electric power source at some time, such as a home appliance such as a television or a vacuum cleaner, an electronic device such as a personal computer, or even a car.

The electrical equipment terminal 100 includes a control power supply unit 140 and a power supply control unit 130 in addition to the electrical equipment main body 110. The control power supply section 140 includes a power generation element 141, a boost circuit 142, and a boost control section 143. The power generating element 141 is sensitive to a frequency band of a predetermined width centered around a frequency at the midpoint between the first frequency and the second frequency, and generates power from a magnetic field. That is, when the frequency of the resonance point of the first magnetic field generation device 501 is f1 in FIG. 2, and the frequency of the resonance point of the second magnetic field generation device 502 is f2 in FIG. It has sensitivity in a frequency range of a predetermined width W centered on =(f1+f2)/2).

The booster circuit 142 boosts the voltage generated by the power generating element 141. For example, as shown in FIG. 3, the voltage generated by the power generating element 141 is 30 to 100 mV, and this is boosted to about several volts (1 to 5 V), which is the operating voltage of the electrical equipment main body 110. The output voltage of the booster circuit 142 changes as shown in FIG. Assuming that a voltage of 30 to 100 mV is generated near the outermost edge of area A11 in FIG. 1, this time is assumed to be t1. Next, the first magnetic field is raised to the operating voltage of the electrical equipment main body 110 by the time t2 when the person P moves in the direction of the area A12 and reaches the vicinity of the boundary between the areas A11 and A12. The positions and magnetic field strengths of the generator 501 and the second magnetic field generator 502 are designed, and the booster circuit 142 is also designed.

Further, the positions and magnetic field strengths of the first magnetic field generating device 501 and the second magnetic field generating device 502 can be designed as shown in FIG. 4. The center of area A12 is the leftmost end of the graph, and the output voltage of the booster circuit 142 of this embodiment changes as shown in FIG. In other words, the design is such that a constant output continues from the center of area A12 to an appropriate position in area A11, and then power generation becomes possible to impossible near the outermost edge of area A11. Compared to the conventional booster circuit output shown by the broken line in FIG. 4, it is possible to boost the operating voltage of the electrical equipment body 110 to a much farther distance from the center of the area A12.

The control power supply section 140 is provided with a boost control section 143. The boost control unit 143 controls the output voltage of the boost circuit 142, and the user can select the output voltage of the boost circuit 142 by setting with a switch or the like. For example, as shown in FIG. 5, one of output voltage A, output voltage B, and output voltage C can be selected. Of course, the output voltage may be controlled continuously instead of in three steps. Note that the magnitude of the voltage is as follows: output voltage A>output voltage B>output voltage C, and the "threshold value" is the reference voltage applied to the electrical equipment main body 110. For this booster circuit 142, a DC/DC converter described in Japanese Patent Application No. 2019-2965 can be adopted.

The power supply control unit 130 operates with the power from the booster circuit 142, and controls the power supply from the booster circuit 142 to the electrical equipment main unit 110 when the power generation element 141 detects a magnetic field and generates power. It is to be turned on. As for whether or not the power generation element 141 is generating power by detecting a magnetic field, the power supply control unit 130 monitors the voltage output from the power generation element 141, and when the voltage is higher than a predetermined value, the power supply control unit 130 detects a magnetic field and detects a magnetic field. It may be determined that the power is being generated by the detection. The power supply control section 130 continues or stops supplying power to the electrical equipment main body section 110 depending on whether or not the power generation element 141 is generating power based on the magnetic field. The above monitoring can be performed at regular time intervals. That is, as shown in FIG. 6, monitoring is performed at the same time interval T. In the example of FIG. 6, at time t00, the magnetic field is above a predetermined value, and when the voltage output from the power generating element 141 is monitored and found to be above the predetermined voltage, time t01, time t02, time t03, . This shows the case where monitoring is performed.

In the power supply control system configured as described above, control is performed according to the flowchart shown in FIG. Before the person P holding the electrical device terminal 100 enters an environment where a magnetic field is generated as shown in FIG. 1, the person P is in a state of waiting for magnetic field detection (STEP 1), and is in a state of determining whether a magnetic field has been detected. Yes (STEP 2). In STEP 1 and STEP 2, no electricity is being generated, so the machine is not operating.

If YES in STEP 2, the (magnetic) power generation element 141 generates power, and the generated voltage is boosted by the booster circuit 142 and supplied to the electrical equipment main body 110 (STEP 3). In the next STEP 4, the power supply control unit 130 detects whether the magnetic field has a predetermined strength by monitoring the voltage output from the power generating element 141 and determining whether the voltage is higher than a predetermined value (STEP 4). If YES in STEP4, STEP3 continues. As a result, as explained with reference to FIG. 3, the time starts at t1, the person P moves in the direction of area A12, and by time t2 when the person P reaches the vicinity of the boundary between area A11 and area A12, the main body of the electrical equipment A ramp-up is performed to an operating voltage of 110.

Therefore, according to the present embodiment, by the time the electrical equipment main body 110 reaches the area A12 where the electrical equipment main body 110 needs to operate, the power environment of the electrical equipment main body 110 is ready, and the electrical equipment can be operated without any particular waiting time. The main body portion 110 can be operated. Therefore, when the electrical equipment main body 110 is in a predetermined area, it is possible to accurately apply a usage pattern in which the electrical equipment main body 110 is used as a terminal such as a smartphone to communicate or provide explanations by display or voice. That is, as long as there are electrical equipment terminals 100 in areas A11 and A12, the magnetic field strength of the first magnetic field generator 501 and the magnetic field strength of the second magnetic field generator 502 change, and as shown in FIG. Even if the magnetic field strength of the generator 502 becomes weaker, or even if the magnetic field strength of the first magnetic field generator 501 becomes weaker as shown in FIG. Since it is sensitive to a frequency range of a predetermined width W centered on f3 (=(f1+f2)/2), power generation is performed in which the necessary voltage can be obtained.

Then, if the answer is NO in STEP 4 in FIG. 7, the power supply to the electrical equipment main body 110 is stopped (STEP 5). Therefore, in the case where the use of the electrical equipment main body 110 is not permitted (outside areas A11, A12), unnecessary or unauthorized use of the electrical equipment main body 110 will not occur. The system allows for appropriate usage restrictions without waste.

FIG. 10 shows the configuration of an electrical equipment terminal 100A according to the second embodiment. The electrical equipment terminal 100A of this embodiment differs from the electrical equipment terminal 100 according to the second embodiment in that it includes an authentication device 150, and the other configurations are the same. The authentication device 150 is supplied with operating power from the control power supply section 140 via the power supply control section 130 and provides the recognition result to the power supply control section 130 . The authentication device 150 may be a biometric authentication device, or simply a device that performs password authentication.

The authentication device 150 is, for example, a fingerprint authentication device, and has the configuration shown in FIG. 11. That is, the CPU 20, which performs fingerprint authentication using programs and data stored in the main memory 21, has a configuration that centrally controls each section. An external storage interface 23 , a sensor interface 24 , a display interface 25 , and a network interface 26 are connected to the CPU 20 via a bus 22 .

An external storage device 33 is connected to the external storage interface 23 . The external storage device 33 stores fingerprint data of a person who is permitted to use the electrical device 110, a fingerprint authentication program, and the like. A capacitive fingerprint sensor 34 is connected to the sensor interface 24 . A display device 35 is connected to the display interface 25 . The display device 35 has a small display such as an LED, and displays messages such as "Use of this device is permitted" and "Use of this device is not allowed." regarding the authentication result. A network line 36 is connected to the network interface 26, and the use of this electrical equipment 110 is permitted periodically or irregularly from a server or the like that manages this electrical equipment system 100 via this network line 36. The contents of the external storage device 33 are updated by downloading update data for the person's fingerprint data, an update program for the fingerprint authentication program, and the like.

Since the electrical equipment terminal 100A configured as described above performs processing according to the flowchart shown in FIG. 12, the operation will be explained based on this flowchart. The same reference numerals as in FIG. 7 are attached to steps that are the same as those in the operation of the electrical equipment terminal 100 according to the first embodiment. STEP1 and STEP2 are the same as in the first embodiment, and include a state of waiting for magnetic field detection (STEP1) and a state of determining whether the magnetic field has been detected (STEP2). If the answer is YES in STEP 2, the (magnetic) power generation element 141 generates power, and the generated voltage is boosted by the booster circuit 142 and supplied to the authentication device 150 (STEP 3A). Following STEP 3A, it is determined whether the authentication was successful (STEP 11), and if the result is NO, a message such as "This device cannot be used" is displayed on the display device 35 (STEP 12), and the electrical device that is currently being supplied with power is displayed. The power supply to the unit 110 is stopped (STEP 5A), and the process ends.

On the other hand, if the branch is YES in STEP11, the power is supplied to the electrical equipment main body 110, and the electrical equipment main body 110 is put into a usable state (STEP3). In this STEP 3, a message such as "Use of this device is permitted" may be displayed on the display device 35. After STEP 3, the electrical equipment 210 is used, and the voltage output from the power generation element 141 is monitored, and the power supply control unit 130 detects whether the voltage is higher than a predetermined value (STEP 4). If YES in STEP 4, use of the electrical equipment main body 110 continues in STEP 3.

In this embodiment, as a result of the authentication processing being performed as described above, time is required for this, but basically the same as in the first embodiment, the area where the electrical equipment main body 110 needs to operate is By the time the vehicle arrives at A12, the power environment of the electrical equipment main body 110 is ready, and the electrical equipment main body 110 can be operated without any particular waiting time. If NO in STEP 4 in FIG. 12, the power supply to the electrical device main body 110 is stopped (STEP 5A).

FIG. 13 shows the configuration of an electrical equipment terminal 100T according to the third embodiment. This electrical equipment terminal 100T is provided with a control power supply section 140A and a control power supply section 140B, and power can be supplied from either of them.

The control power supply unit 140A includes a first power generation element 141A and a first booster circuit 142A. The control power supply unit 140B includes a second power generation element 141B and a second booster circuit 142B. The first power generating element 141A has sensitivity in the third frequency band. The second power generating element 141B has sensitivity in the fourth frequency band. The third frequency band and the fourth frequency band are included in a frequency range of a predetermined width W centered on the midpoint frequency f3 (=(f1+f2)/2) explained in FIG. 2. The third frequency band and the fourth frequency band may be the same frequency band or may be different frequency bands.

The first booster circuit 142A boosts the voltage generated by the first power generating element 141A several times under the control of the booster controller 143, up to the operating voltage of the electrical equipment main body 110. Boost the pressure. The second booster circuit 142B boosts the voltage generated by the second power generating element 141B several times under the control of the booster controller 143, up to the operating voltage of the electrical equipment main body 110. Boost the pressure.

The power supply control unit 130 performs a first step-up step that boosts the voltage generated by the power generation element that first detects a magnetic field and starts power generation, out of the first power generation element 141A or the second power generation element 141B. The circuit 142A or the second booster circuit 142B is selected and control is performed to supply power from this booster circuit to the electrical equipment main body section 110.

The electrical equipment terminal 100T having the above configuration operates as shown in the flowchart shown in FIG. That is, the power supply control unit 130 supplies the electric power from the booster circuit of the power generation element, which has previously detected the magnetic field and started power generation, to the electrical equipment main body 110 (STEP 21), and adjusts the voltage of the current power generation element. (That is, the voltage from the booster circuit) is detected whether it is excessive or insufficient using a predetermined threshold (STEP 22). Note that cases where the amount becomes too large include when the magnetic field is extremely close to the source of the magnetic field, and cases where the amount becomes too small include when the electric device terminal 100T deviates from the usable area or permitted use area.

If NO in STEP 22, the current power supply state is maintained (STEP 23), and the process returns to STEP 22 to continue the process. On the other hand, if YES in the above STEP 22, power from a power generating element side other than the currently selected power generating element side (that is, power from the booster circuit) is supplied to the electrical equipment main body 110 (STEP 24), and the power generated in the above STEP 22 is Return to continue processing. During such power supply, the electronic device terminal 100T performs the processing operations described with reference to FIG. 7. In this way, according to the present embodiment, it is possible to extremely reduce the possibility that the electric device terminal 100T will malfunction or the user will suffer unexpected damage due to an excessive electric field, and even if the user is in the area where it should normally operate, It is possible to recover from a failure that makes it difficult to detect a magnetic field in the band.

FIG. 15 shows the configuration of an electrical equipment terminal 100F according to the fourth embodiment. This electrical equipment terminal 100F is provided with a control power supply unit 140A and a control power supply unit 140B, and can be supplied with power from both of the electrical equipment terminal 100A according to the second embodiment. That is, this embodiment employs a configuration that is a combination of the second embodiment and the third embodiment.
The specific configuration is as described in the third embodiment, and its description will be omitted.

The operation flowchart of the electrical equipment terminal 100F according to the fourth embodiment is as shown in FIG. The flowchart shown in FIG. 16 is substantially the same as the operation flowchart of the electrical equipment terminal 100T according to the third embodiment shown in FIG. The different steps are STEP21F and STEP24F.

In STEP 21F, which is a modification of STEP 21 of the third embodiment, power from the booster circuit on the side of the power generation element that has detected the magnetic field and started power generation is transferred to the operating equipment of the electrical equipment main body 110 and the authentication device 150. supply to In addition, in STEP 24F, which is a modification of STEP 24 of the third embodiment, power from a power generation element side different from the currently selected power generation element side (i.e., power from a booster circuit) is authenticated with the electrical equipment main body 110. It is supplied to devices in operation among the devices 150.

According to the fourth embodiment, it is possible to extremely reduce the possibility that the electrical equipment terminal 100F including the authentication device 150 will malfunction due to an excessive electric field or that the user will suffer unexpected damage, and the It is possible to recover from a failure in which it becomes difficult to detect a magnetic field in a certain frequency band even though the user is present, and the functions of the electrical equipment terminal 100F, including authentication, can be fully utilized.

A11, A12 Area 100, 100A, 100F, 100T Electrical equipment terminal 110 Electrical equipment main body 130 Power supply control unit 140, 140A, 140B Control power supply unit 141 Power generation element 141A First power generation element 141B Second power generation element 142 Boost Circuit 142A First boost circuit 142B Second boost circuit 143 Boost control unit 150 Authentication device 500 Power supply system 501 First magnetic field generator 502 Second magnetic field generator

Claims (10)

a first magnetic field generating device that generates an electric field of a first intensity with a first frequency as a resonance point centered at a predetermined position where the intensity of the generated magnetic field is maximum ;
a second magnetic field generating device that generates an electric field of a second intensity with a second frequency as a resonance point centered on the predetermined position where the intensity of the generated magnetic field is maximum ;
a power supply system comprising;
It is sensitive to a frequency band of a predetermined width centered on a frequency at the midpoint between the first frequency and the second frequency, and has a frequency range from the center where the strength of the magnetic field generated by the first magnetic field generating device is maximum. the first radius from the center where the electric field by the first magnetic field generating device and the second magnetic field generating device and the magnetic field generated by the second magnetic field generating device in an area with a radius of 1 are maximum; Electricity can be generated by the electric field generated by the first magnetic field generator and the second magnetic field generator in an area with a shorter second radius, and the first magnetic field generator in an area with a radius exceeding around the first radius. a power generation element that is unable to generate electricity due to the electric field generated by the magnetic field generator and the second magnetic field generator ;
an electrical equipment main body that performs a predetermined function and/or a predetermined process and receives power supply;
a booster circuit that boosts the voltage generated by the power generation element by the electric field of the first magnetic field generator and the second magnetic field generator to the operating voltage of the electrical equipment main body ;
a power supply control unit that turns on power supply from the booster circuit to the electrical equipment main body when the power generation element detects a magnetic field and generates power;
an electrical equipment terminal comprising;
A power supply control system comprising: The power generating element includes a first power generating element having sensitivity to a third frequency band and a second power generating element having sensitivity to a fourth frequency band,
The booster circuit includes a first booster circuit that boosts the voltage generated by the first power generating element, and a second booster circuit that boosts the voltage generated by the second power generator,
The power supply control unit includes a first booster circuit that boosts a voltage generated by a power generation element that first detects a magnetic field and starts power generation among the first power generation element or the second power generation element; 2. The power supply control system according to claim 1, wherein the second booster circuit is selected and power is supplied from the second booster circuit to the electrical equipment main body. The power supply control section switches from a currently selected booster circuit to a currently unselected booster circuit when the voltage being supplied to the electrical device is equal to or higher than a predetermined threshold, and controls the electrical device's main body. The power supply control system according to claim 2, wherein the power supply control system supplies power to. The electrical equipment terminal has an authentication section having an authentication function,
The power supply according to any one of claims 1 to 3, wherein the power supply control unit continues or stops power supply to the electrical equipment main body based on the authentication result by the authentication unit. control system. 5. The power supply control unit continues or stops power supply to the electrical equipment main body depending on whether power is being generated based on the magnetic field by the power generation element. The power supply control system according to any one of the items. A first magnetic field generating device that generates an electric field of a first intensity with a first frequency as a resonance point centered at a predetermined position where the intensity of the generated magnetic field is maximum; An electrical equipment terminal used in a power supply system comprising a second magnetic field generating device that generates an electric field of a second intensity centered at the predetermined position and having a second frequency as a resonance point ,
It is sensitive to a frequency band of a predetermined width centered on a frequency at the midpoint between the first frequency and the second frequency, and has a frequency range from the center where the strength of the magnetic field generated by the first magnetic field generating device is maximum. the first radius from the center where the electric field by the first magnetic field generating device and the second magnetic field generating device and the magnetic field generated by the second magnetic field generating device in an area with a radius of 1 are maximum; Electricity can be generated by the electric field generated by the first magnetic field generator and the second magnetic field generator in an area with a shorter second radius, and the first magnetic field generator in an area with a radius exceeding around the first radius. a power generation element that is unable to generate electricity due to the electric field generated by the magnetic field generator and the second magnetic field generator ;
an electrical equipment main body that performs a predetermined function and/or a predetermined process and receives power supply;
a booster circuit that boosts the voltage generated by the power generation element by the electric field of the first magnetic field generator and the second magnetic field generator to the operating voltage of the electrical equipment main body ;
a power supply control unit that turns on power supply from the booster circuit to the electrical equipment main body when the power generation element detects a magnetic field and generates power;
An electrical equipment terminal equipped with. The power generating element includes a first power generating element having sensitivity to a third frequency band and a second power generating element having sensitivity to a fourth frequency band,
The booster circuit includes a first booster circuit that boosts the voltage generated by the first power generating element, and a second booster circuit that boosts the voltage generated by the second power generator,
The power supply control unit includes a first booster circuit that boosts a voltage generated by a power generation element that first detects a magnetic field and starts power generation among the first power generation element or the second power generation element; 7. The electrical equipment terminal according to claim 6, wherein a second booster circuit is selected and power is supplied from the second booster circuit to the electrical equipment main body. The power supply control section switches from a currently selected booster circuit to a currently unselected booster circuit when the voltage being supplied to the electrical device is equal to or higher than a predetermined threshold, and controls the electrical device's main body. The electrical equipment terminal according to claim 7, wherein the electrical equipment terminal supplies power to the electrical equipment terminal. It has an authentication section with an authentication function,
The electrical equipment according to any one of claims 6 to 8, wherein the power supply control unit continues or stops power supply to the electrical equipment main body based on the authentication result by the authentication unit. terminal. 10. The power supply control section according to claim 6, wherein the power supply control section continues or stops power supply to the electrical equipment main body depending on whether or not the power generation element is generating power based on the magnetic field. The electrical equipment terminal according to any one of the items.

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