JP7025140B2 - Power supply system - Google Patents

Description

The present invention relates to power supply from a power supply device to a power receiving device.

In recent years, in line with the sophistication and diversification of the functions of electronic devices, the number of systems in which devices are unitized and users select and combine each unit is increasing. In such a system, the power terminal and the data communication terminal of each unit are connected to each other via a connection portion such as a connector.

Here, for example, the following system can be considered. In the system, the unit having the server function is referred to as the main unit (power supply device). Further, a unit having a voice interface and a LAN (Local Area Network) interface is referred to as a subunit (power receiving device). Then, the main unit and one or both of these subunits are connected by a connector, and power is supplied from the main unit to the subunit. The system has the flexibility to select the subunits to operate according to the situation. In the system, each unit is equipped with a central processing unit, and operation processing is performed by independent software. Here, in general service application software, both software between units operate in cooperation with each other. However, the power feeding operation is performed before the software is started in the subunit. Therefore, the subunit cannot control the power feeding operation. Therefore, the power supply operation is controlled by the operation processing in the main unit and the hardware.

Therefore, in order to ensure power efficiency and safety, it is necessary for the main unit to have a mechanism that can detect the connector connection with the subunit and the presence / absence of operation processing in the subunit.

Here, Patent Document 1 discloses a system that detects a connected power receiving device and controls power supply to the detected device. This system realizes the above-mentioned mechanism by a predetermined circuit and wiring configuration using two signals, an existence request signal and an existence detection signal through a cable. The existence request signal is sent to the power receiving device when the connection is detected. The circuit on the power receiving device side feeds back the same timing signal as an existence signal to the power feeding device as a response to the existence request signal. When the power supply device detects the presence signal, it considers that the power receiving device is connected and starts power supply. After the power is supplied, the power receiving device always notifies the power supply device that the power is connected by a high-level continuous presence signal. When the power receiving device is disconnected, a low level signal is input to the detection circuit of the power feeding device. The power supply device recognizes that the connection has been disconnected by a low level signal.

Special Table 2002-507349 Gazette

The method disclosed in Patent Document 1 has the following three problems.

The first problem is that this method requires a lot of mounting resources in the circuit of the power feeding device and the cable between the devices.

The reason is that this method requires two types of circuits, an existence detector and a signal generator, in the power supply device, and also two types of signal lines, one for the existence request signal and the other for the existence detection signal, in the inter-device cable. This is because it is necessary to secure. This can be a non-negligible obstacle to the demand for compactification of electronic devices.

The second problem is that this method may not be sufficiently safe during operation.

The reason is that when the same method is applied, the power feeding device is connected to the power receiving device in the unpowered state with the timing signal being output by the cable. In that case, the input terminal of the power receiving device may be latched up and the input terminal may be damaged.

The third problem is that the method may not be sufficiently power efficient.

In this method, when the power supply from the power supply device is started, the power receiving device always inputs a high level signal to the power supply device. Then, when the power supply device stops power supply, the detection signal becomes low level. Even if the connector between the power supply device and the power receiving device is further disconnected, the detection signal remains low level. That is, in the above method, the power feeding device cannot distinguish between a state in which the connector is disconnected and a state in which the connector is connected but the power receiving device is not operating and power supply is not required.

Therefore, with this method, it is not possible to perform power supply control aimed at further ensuring power efficiency. Such power supply control is, for example, power supply control in which power supply is stopped to reduce power consumption when it is not necessary to operate the power receiving device depending on the service status or schedule.

An object of the present invention is to provide a power supply system or the like that can further reduce mounting resources, ensure safety during operation, and improve power efficiency.

The power supply system of the present invention includes a power receiving device and a power feeding device, and the power receiving device includes a first portion for grounding the first terminal when the second terminal power supply, which is the power supply to the second terminal, is not performed. The second part, the first part, and the first application, which is the first application of the first variable voltage, which is the application of the first variable voltage that fluctuates with the passage of time, and the release of the ground when performing a predetermined process. The power supply device includes two parts and a third part that supplies power received by the second terminal to the second part, and the power supply device is electrically disconnected from the first terminal and the third terminal. If this is the case, the voltage is other than the fourth part, which is the application of a predetermined DC voltage to the third terminal, and the DC voltage at which the voltage of the third terminal is higher than the predetermined threshold. (1) When a determination result is obtained, it indicates that the first electrical connection between the first terminal and the third terminal and the second electrical connection between the second terminal and the fourth terminal are both performed. When the first information is output and the second determination result that the voltage of the third terminal is the second fluctuating voltage which fluctuates with the passage of time is obtained, the second indicating that the process is being performed. A fifth portion for outputting information and a sixth portion capable of supplying power to the fourth terminal, which is power supply to the fourth terminal when the fifth portion outputs the first information, are provided.

According to the present invention, the power supply system or the like can further reduce mounting resources, ensure safety during operation, and improve power efficiency.

It is a conceptual diagram which shows the structural example of the power supply system of this embodiment. It is a conceptual diagram which shows the processing flow example of the processing performed by the processing unit of a power receiving device. It is a conceptual diagram which shows the processing flow example of the processing performed by the detection part of a power feeding device. It is a figure which shows the detection voltage, the connection of a connection part, the output of a feeding part, and the operation processing of a processing part at each timing. It is a block diagram which shows the minimum structure of the power supply system of this embodiment.

[Configuration and operation]
FIG. 1 is a conceptual diagram showing a configuration of a power supply system 100, which is an example of the power supply system of the present embodiment.

The power supply system 100 includes a power supply device 101, a power receiving device 202, and a connection unit 301.

The power supply system 100 is a device for supplying power from the power supply device 101 to the power receiving device 202.

The power feeding device 101 includes a detection unit 113, a processing unit 111, a power feeding unit 112, a voltage source 121, and a resistor 115.

The power receiving device 202 includes a switching unit 234, a capacitor 235, a notification unit 233, a processing unit 221 and a power receiving unit 232.

The connection portion 301 is composed of, for example, a connector and a receptor, and has electrical connection and disconnection (disconnection) between both terminals in each terminal pair of the terminal pair of terminal K and terminal L and the terminal pair of terminal M and terminal N. ) And make it easier for workers to do. Hereinafter, the fact that the terminal K and the terminal L, and the terminal M and the terminal N are all electrically connected means that the connection portion 301 is "connected". Further, the fact that the terminal K and the terminal L, and the terminal M and the terminal N are all electrically disconnected means that the connection portion 301 is "disconnected".

The detection unit 113 includes a measurement unit 113a and a processing unit 113b.

The measuring unit 113a measures the terminal A voltage, which is the voltage of the terminal A. Then, the measuring unit 113a determines whether the terminal A voltage is higher than a predetermined threshold value at the timing synchronized with the first clock signal (for example, the rising timing of the first clock signal). Here, the first clock signal is a clock signal for synchronizing the timing of processing in the detection unit 113. When the measuring unit 113a determines that the terminal A voltage is higher than the threshold value, for example, the measuring unit 113a outputs a high level (“1” logic level) signal to the processing unit 113b. On the other hand, when the measuring unit 113a determines that the terminal A voltage is equal to or lower than the threshold value, the measuring unit 113a outputs, for example, a low level (“0” logic level) signal to the processing unit 113b.

The processing unit 113b synchronizes the determination of whether the output from the measurement unit 113a (hereinafter referred to as “measurement output”) is high level or low level with the first clock signal (for example, of the first clock signal). Perform at each rise timing). The determination can be made by a general logic circuit.

Then, when the period in which the measurement output is at a high level continues for a predetermined period TA, the processing unit 113b determines that the connection unit 301 is disconnected. When the connection unit 301 is not connected, a predetermined DC voltage is applied from the voltage source 121 to the terminal B, and the terminal B is not grounded via the connection unit 301 and the switching unit 234 of the power receiving device 202. .. Therefore, the terminal A voltage becomes a DC voltage higher than the threshold value. The threshold value is lower than the terminal A voltage when a predetermined DC voltage is applied from the voltage source 121 to the terminal B and the terminal B is not grounded via the connection portion 301 and the switching portion 234 of the power receiving device 202. It is set to a value.

When the processing unit 113b determines that the connection unit 301 is disconnected, the processing unit 113b sends the first B information, which is information indicating that the connection unit 301 is disconnected, to the processing unit 111.

On the other hand, if the processing unit 113b does not determine that the connection unit 301 is disconnected, the processing unit 113b determines that the connection unit 301 is connected. Then, the processing unit 113b sends the first A information, which is information indicating that the connection unit 301 is connected, to the processing unit 111.

The processing unit 113b also determines that the power receiving device 202 is in the operating state when the measurement output has both a high level timing and a low level timing in the period TA. Then, the processing unit 113b sends the second A information, which is information indicating that the power receiving device 202 is in the operating state, to the processing unit 111. Here, the fluctuation between the high level and the low level of the output from the measuring unit 113a to the processing unit 113b in the period TA is due to the notification signal described later sent by the power receiving device 202. The cycle in which the notification signal is switched between the high level and the low level is assumed to be sufficiently larger than the cycle of the first clock signal. Therefore, the processing unit 113b can detect both the high level of the measurement output corresponding to the high level of the notification signal and the low level of the measurement output corresponding to the low level of the notification signal.
Even if the processing unit 113b determines in the period TA that the power receiving device 202 is in the operating state when the timing at which the measurement output is at the high level and the timing at which the measurement output is at the low level are repeated in a predetermined cycle. I do not care.

In that case, the processing unit 113b, for example, has a first period (first clock number) in which the high level continues continuously in the measurement output and a second period in which the low level continues continuously. (Number of second clocks) and is measured. The processing unit 113b holds the first period and the second period for the notification signal described later in a recording unit (not shown) in advance. Then, when the processing unit 113b determines that the first period and the second period of the terminal A voltage substantially coincide with the first period and the second period of the notification signal. , It is determined that the signal by the notification signal has reached the terminal A.

When the processing unit 111 receives the first A information from the detection unit 113, the processing unit 111 sends a first A instruction signal, which is a signal instructing power supply to the power receiving unit 232 of the power receiving device 202, to the power feeding unit 112. I will send it to you. The processing unit 111 is, for example, a central processing unit.

Only when the processing unit 111 or the detection unit 113 receives the first A information in the connection unit 301 and the predetermined condition (second condition) is satisfied, the first A is referred to the feeding unit 112. Instructional information may be sent. In that case, the processing unit 111 sends a first B instruction signal, which is a signal for stopping the power supply to the power receiving unit 232 of the power receiving device 202, when it is determined that another condition (third condition) is satisfied. It may be sent to the power feeding unit 112.

After sending the first B instruction signal, the processing unit 111 may send the first A instruction signal again to the power feeding unit 112.

The voltage source 121 applies a predetermined DC voltage to the terminal B via the resistor 115. As a result, in a state where the terminal K and the terminal L of the connection portion 301 are electrically disconnected, the voltage of the terminal B becomes a DC voltage higher than the threshold value. The DC voltage supplied by the voltage source 121 to the terminal B becomes a voltage equal to or lower than the threshold value due to the electrical connection between the terminal K of the connection portion 301 and the terminal L connected to the ground via the switching portion 234. The resistance value of the resistor 115 is set to a value (sufficiently large) such that the value higher than the threshold value becomes the value equal to or lower than the threshold value due to the electrical connection between the terminal K and the terminal L of the connection portion 301.

The power feeding unit 112 starts feeding power from the terminal C to the terminal G of the power receiving unit 232 by the first A instruction signal from the processing unit 111. The power feeding unit 112 also stops power supply from the terminal C to the terminal G of the power receiving unit 232 by the first B instruction signal from the processing unit 111.

On the other hand, when the power receiving unit 232 of the power receiving device 202 receives power from the power feeding unit 112, the power receiving unit 232 supplies power to a predetermined configuration of the power receiving device 202. The configuration includes a switching unit 234, a notification unit 233 and an operation unit 212. In FIG. 1, the feeding path from the power receiving unit 232 to these configurations is not shown.

The processing unit 221 includes an operation unit 212 and a notification unit 233.

When the operating unit 212 receives power from the power receiving unit 232, the operating unit 212 sends a second instruction signal, which is a signal for connecting the terminal D and the terminal E, to the switching unit 234. When the operating unit 212 receives power from the power receiving unit 232, the operating unit 212 also informs the notification unit 233, the terminal I of the capacitor 235, and the notification signal having the predetermined period described in the description of the detection unit 113. A third instruction signal, which is a signal instructing the transmission of the capacitor, is sent. The period is, for example, a clock signal or a period synchronized with the clock signal.

Then, the operation unit 212 starts a predetermined operation process. The content of the operation process is arbitrary. The operation process is, for example, a process executed by a predetermined program after starting the operating system. In that case, the start of the operation process is, for example, the start of booting the operating system.

When starting the end of the process, the operation unit 212 sends a fourth instruction signal instructing the notification unit 233 to stop the notification signal.

When the notification unit 233 receives the third instruction signal from the operation unit 212, the notification unit 233 inputs the above-mentioned notification signal to the terminal I of the capacitor 235. The notification signal input to the terminal I of the capacitor 235 is supplied to the terminal A of the detection unit 113 via the capacitor 235, the switching unit 234, and the connection unit 301.

The notification signal is, for example, a signal synchronized with a second clock signal that synchronizes the processing performed by the processing unit 221. The notification signal is a signal having a low voltage level and a high voltage level in the period TA. Then, as described above, the period during which the low level continues in the notification signal is sufficiently longer than the period of the first clock signal described above. Further, the period during which the high voltage level continues in the notification signal is sufficiently longer than the period of the first clock signal described above. Therefore, the detection unit 113 of the power feeding device 101 detects both the terminal A voltage level corresponding to the low level of the notification signal and the terminal A voltage level corresponding to the high voltage level of the notification signal during the period TA. can do.

When the notification unit 233 receives the fourth instruction signal from the operation unit 212, the notification unit 233 stops the input of the notification signal to the terminal I of the capacitor 235.

The capacitor 235 passes the signal of the predetermined frequency input from the notification unit 233 to the terminal H. In the capacitor 235, a voltage source 121 is generated, and the DC voltage transmitted to the terminal H of the capacitor 235 via the terminal B and the switching unit 234 is not passed to the terminal I.

The switching unit 234 electrically connects the terminal D and the terminal F when power is not supplied from the power receiving unit 232. Terminal F is connected to ground. When the second instruction signal is input from the operating unit 212, the switching unit 234 electrically disconnects the terminal D and the terminal F, and electrically connects the terminal D and the terminal E.

FIG. 2 is a conceptual diagram showing an example of a processing flow of processing performed by the operation unit 212 shown in FIG.

The operating unit 212 starts the process shown in FIG. 2, for example, by supplying electric power from the power receiving unit 232.

Then, the operation unit 212 determines whether to start the operation process as the process of S101. The content of the operation process is arbitrary. The operation process is, for example, a process executed by a predetermined program after starting the operating system. The operation unit 212 makes the determination, for example, by determining whether or not start information is input from the outside.

If the determination result by the process of S101 is yes, the operation unit 212 performs the process of S102.

On the other hand, when the determination result by the processing of S101 is no, the operation unit 212 performs the processing of S101 again.

When the operation unit 212 performs the processing of S102, the operation unit 212 sends the above-mentioned second instruction signal to the switching unit 234 as the same processing. The switching unit 234 electrically connects the terminal D and the terminal E shown in FIG. 1 by sending the second instruction signal.

Next, the operation unit 212 sends the above-mentioned third instruction signal to the notification unit 233 as a process of S103. The notification unit 233 starts inputting the above-mentioned notification signal to the terminal I of the capacitor 235 by sending the third instruction signal.

Then, the operation unit 212 starts the above-mentioned operation process as the process of S104.

The moving unit 212 may simultaneously perform the processing of S103 and the processing of S104. Further, the operating unit 212 may start the process of S104 before the start of the process of S103. Further, the operating unit 212 may end the processing of S104 before the processing of S103 is completed.

Next, the operation unit 212 determines whether to end the operation process. The operation unit 212 makes the determination, for example, by determining whether or not the end information is input from the outside.

If the determination result by the process of S105 is yes, the operation unit 212 performs the process of S106.

On the other hand, if the determination result by the process of S105 is no, the operation unit 212 performs the process of S105 again.

When the operation unit 212 performs the processing of S106, the operation unit 212 starts the end of the operation processing as the same processing. The start is, for example, the start-up of the program for the operation.

Then, the operation unit 212 sends the above-mentioned fourth instruction signal to the notification unit 233 as a process of S107. The notification unit 233 stops the output of the notification signal to the terminal I of the capacitor 235 shown in FIG. 1 by the fourth instruction signal.

The operation unit 212 completes the process shown in FIG. 2 by completing the end of the operation process started by the process of S106. If the end processing of the operation processing started by the processing of S106 is completed before the processing of S107, the operation unit 212 ends the processing shown in FIG. 2 by the end of the processing of S107.

The moving unit 212 may simultaneously perform the processing of S106 and the processing of S107. Further, the operating unit 212 may start the processing of S107 before the start of the processing of S106. Further, the operating unit 212 may end the processing of S107 before the end of the processing of S106.

FIG. 3 is a conceptual diagram showing a process performed by the detection unit 113 of the power feeding device 101 shown in FIG.

The detection unit 113 starts the processing shown in FIG. 3, for example, by inputting start information from the processing unit 111.

Then, as a process of S201, the detection unit 113 determines whether the terminal A voltage is a DC voltage higher than the threshold value. The detection unit 113 makes the determination, for example, by determining whether or not the period higher than the threshold value has continued TA for a predetermined period.

When the determination result by the processing of S201 is no, the detection unit 113 performs the processing of S202.

On the other hand, if the determination result by the processing of S201 is yes, the detection unit 113 performs the processing of S203.

When the detection unit 113 performs the processing of S202, the detection unit 113 processes the above-mentioned first A information indicating that the terminals of the connection unit 301 are electrically connected to each other in the two terminal pairs. It will be sent to unit 111. Then, the detection unit 113 performs the processing of S204.

When the processing of S203 is performed, the detection unit 113 also outputs the above-mentioned first B information indicating that the connection unit 301 is disconnected to the processing unit 111 as the same processing. Then, the processing unit 111 performs the processing of S207.

When the processing of S204 is performed, the detection unit 113 determines whether the terminal A voltage is an AC voltage having a predetermined cycle as the same processing. The detection unit 113
The determination is performed, for example, by determining whether the first period and the second period for the terminal A voltage substantially coincide with the first period and the second period of the notification signal. .. The signal corresponding to the notification signal is input from the notification unit 233 shown in FIG. 1 to the switching unit 234 via the capacitor 235. The signal corresponding to the notification signal is input to the terminal A when the connection unit 301 is connected and the terminal D and the terminal E of the switching unit 234 are electrically connected.

If the determination result by the processing of S204 is yes, the detection unit 113 performs the processing of S205.

On the other hand, when the determination result by the processing of S204 is no, the detection unit 113 performs the processing of S206.

When processing S205, the detection unit 113 outputs the above-mentioned second A information indicating that the power receiving device 202 is in the operating state to the processing unit 111. Then, the processing unit 111 performs the processing of S207.

When processing S206, the detection unit 113 outputs the above-mentioned second B information indicating that the power receiving device 202 is not in the operating state to the processing unit 111. Then, the processing unit 111 performs the processing of S201 again.

When the process of S207 is performed, the detection unit 113 determines whether to end the process shown in FIG. 3 as the process. The detection unit 113 makes the determination, for example, by determining whether or not the end information is input from the processing unit 111.

When the determination result by the process of S207 is yes, the detection unit 113 ends the process shown in FIG.

On the other hand, when the determination result by the processing of S207 is no, the detection unit 113 performs the processing of S201 again.

FIG. 4 is a diagram showing each of the voltage of the terminal A detected by the detection unit 113, the connection of the connection unit 301, the output from the terminal C by the power supply unit 112, and the operation processing by the operation unit 212 at each timing.

At the timing a shown in FIG. 4, it is assumed that the connection portion 301 is disconnected.

At this time, a voltage is applied to the terminal A from the voltage source 121 shown in FIG. Further, the terminal K and the terminal L are not electrically connected. Therefore, the terminal A voltage is a high level DC voltage.

Next, at timing b, it is assumed that the connection unit 301 is connected by, for example, an operator.

In this state, the terminal D of the switching unit 234 shown in FIG. 1 is connected to the terminal F. Further, the terminal F is grounded. Further, the resistance 115 is set to a value such that when the terminal K of the connection portion 301 is grounded, the level becomes low. Therefore, when the terminal K and the terminal L of the connection unit 301 are connected, the terminal A voltage detected by the detection unit 113 becomes a low-level DC voltage.

Then, the detection unit 113 determines that the terminal A voltage is at a low level (process of S201 shown in FIG. 3).

Then, the detection unit 113 notifies the processing unit 111 shown in FIG. 1 (processing of S202 shown in FIG. 3).

Upon receiving the notification, at the timing c shown in FIG. 4, the processing unit 111 causes the power feeding unit 112 to start supplying power to the power receiving unit 232. The power receiving unit 232 receives the power supply and starts supplying power to each configuration of the power receiving device 202. The power supply includes power supply to each of the operation unit 212, the switching unit 234, and the notification unit 233.

The operating unit 212 connects the terminal D and the terminal E to the switching unit 234 (process of S102 shown in FIG. 2).

The operating unit 212 also instructs the notification unit 233 to send a notification signal from the terminal J to the terminal I (processing of S103 shown in FIG. 2).

As a result, the notification signal sent by the notification unit 233 to the terminal I reaches the terminal A via the capacitor 235, the switching unit 234, and the connection unit 301.

Therefore, the detection unit 113 detects an AC signal having the same period as the notification signal between the timing d and the timing e shown in FIG.

The operation unit 212 also starts the above-mentioned operation process at the timing d (process of S104 shown in FIG. 2).

Then, it is assumed that the operation unit 212 has completed the above-mentioned operation process at the timing e (processes of yes and S106 of S105 shown in FIG. 2).

In that case, the operation unit 212 stops the transmission of the notification signal to the notification unit 233 at the timing e (processing of S107 shown in FIG. 2).

At the timing between ef, the terminal D of the switching unit 234 is connected to the terminal E. A DC voltage is applied from the voltage source 121 to the terminal B. Therefore, the detection unit 113 detects a high-level DC voltage between the timing e and the timing f as the terminal A voltage.

The detection unit 113 notifies the processing unit 111 that the operation unit 212 has not performed the operation processing (processing of S206 shown in FIG. 3).

Then, at the timing f shown in FIG. 4, the processing unit 111 causes the power feeding unit 112 to stop supplying power to the power receiving unit 232.

As a result, the power supply from the power receiving unit 232 to the switching unit 234 is stopped. As described above, the switching unit 234 electrically connects the terminal D to the terminal F in the state where there is no power supply.

Therefore, between the timing f and the timing g shown in FIG. 4, the detection unit 113 detects the low level as the terminal A voltage.

The detection unit 113 outputs information indicating that the connection unit 301 is connected (process of S202 shown in FIG. 3).

After that, at the timing g, it is assumed that the connection portion 301 is disconnected by, for example, an operator. The worker performs the disconnection by, for example, the output from the processing unit 111 after receiving the output of the information indicating that the connection unit 301 is connected from the detection unit 113.

In that case, the electrical connection between the terminal K and the terminal L shown in FIG. 1 is disconnected. Therefore, the detection unit 113 detects a high-level DC voltage as the terminal A voltage by applying a voltage from the voltage source 121.

Then, the detection unit 113 outputs information indicating that the connection unit 301 is disconnected to the processing unit 111 (processing of S203 shown in FIG. 3).
[effect]
In the power supply system of the present invention, the power supply device knows whether or not the connection unit is connected by the detection unit determining whether or not the monitoring voltage has dropped. Further, in the power receiving device of the power feeding system, when the processing unit starts the operation processing, the notification unit sends a notification signal of a predetermined frequency to the power feeding device. The detection unit of the power feeding device knows the presence / absence of the processing operation in the power receiving device by detecting the presence / absence of the notification signal of the frequency.

That is, the power feeding device knows whether or not there is a connection at the connection portion with the power receiving device and the operating state of the power receiving device.

In the power feeding system, the power feeding device does not need to be provided with a source of the notification signal in order to obtain the above-mentioned effects. Further, the number of signal lines between the power feeding device and the power receiving device is also one. That is, the power feeding system can reduce the mounting resources as compared with the method disclosed in Patent Document 1.

In the power feeding system, the timing signal is not sent from the power feeding device to the power receiving device when the connection portion is connected. Therefore, as compared with the method disclosed in Patent Document 1, there is a low possibility that the input terminal will be damaged during connection.

As described above, the power supply device cannot distinguish between a state in which the connector is disconnected and a state in which the connector is connected but the power receiving device is not operating and power supply is not required. Therefore, the power feeding device can perform power feeding control aiming at further ensuring power efficiency as compared with the method disclosed in Patent Document 1.

FIG. 5 is a block diagram showing a configuration of a power supply system 100x, which is a minimum configuration of the power supply system of the present embodiment.

It includes a power receiving device 202x and a power feeding device 101x.

The power receiving device 202x includes a first portion, a second portion, and a third portion (not shown).

The first portion grounds the first terminal when the second terminal power supply, which is the power supply to the second terminal, is not performed. The second portion performs the first application, which is the release of the grounding and the application of the first variable voltage, which fluctuates with the passage of time, to the first terminal when performing a predetermined process. The third portion supplies electric power supplied with the second terminal to the first portion, the second portion, and the second portion.

The power feeding device 101x includes a fourth portion, a fifth portion, and a sixth portion (not shown).

The fourth portion performs a second application, which is a predetermined DC voltage application, to the third terminal when the first terminal and the third terminal are electrically disconnected. The fifth portion outputs the first information when the first determination result that the voltage of the third terminal is a DC voltage higher than a predetermined threshold value is obtained. The first information is information indicating that the first electrical connection between the first terminal and the third terminal and the second electrical connection between the second terminal and the fourth terminal are performed together. .. The fifth portion indicates that the processing is performed when the second determination result that the voltage of the third terminal is the second fluctuating voltage that fluctuates with the passage of time is obtained. (2) Output information. The sixth portion may supply power to the fourth terminal, which is a power supply to the fourth terminal when the fifth portion outputs the first information.

The power feeding device 101x determines and outputs the presence / absence of the first electrical connection and the second electrical connection based on the magnitude relationship between the voltage of the third terminal and the threshold value depending on the presence / absence of the ground. Further, when the power receiving device 202x starts the process, the power receiving device 202x sends the first AC voltage to the power feeding device 101x via the first terminal and the third terminal connected to each other. The power feeding device 101x detects the presence / absence of the processing in the power receiving device 202x by detecting the second AC voltage due to the first AC voltage.

That is, the power feeding device 101x can know whether or not there is a connection with the power receiving device 202x and the operating state of the power receiving device 202x.

In the power feeding system 100x, in order to obtain the above-mentioned effect, the power feeding device 101x does not need to include a source of the notification signal. Further, it is not necessary to have a plurality of signal lines between the power feeding device 101x and the power receiving device 202x. That is, the power feeding system can reduce the mounting resources as compared with the method disclosed in Patent Document 1.

In the power feeding system 100x, the timing signal is not sent from the power feeding device 101x to the power receiving device 202x when the connection is made. Therefore, the power feeding system 100x is less likely to break the input terminal at the time of connection as compared with the system using the method disclosed in Patent Document 1.

As described above, the power supply device 101x has a state in which the connection with the power receiving device 202x is disconnected and a state in which the connection is made but the power receiving device 202x is not operating and power supply is not required. Can be identified. Therefore, the power feeding device 101x can perform power feeding control aiming at further securing of power efficiency as compared with the method disclosed in Patent Document 1.

Therefore, the power feeding system 100x exhibits the effects described in the section [Effects of the Invention] according to the above configuration.

Although each embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and further modifications, substitutions, and adjustments can be made without departing from the basic technical idea of the present invention. Can be added. For example, the composition of the elements shown in each drawing is an example for facilitating the understanding of the present invention, and is not limited to the composition shown in these drawings.

Further, a part or all of the above-described embodiment may be described as in the following appendix, but is not limited to the following.

(Appendix A1)
Equipped with a power receiving device and a power feeding device,
In the power receiving device, the first part for grounding the first terminal when the second terminal power supply, which is the power supply to the second terminal, is not performed, and the grounding is released and the time elapses when performing a predetermined process. The second terminal power supply is supplied to the second portion, the first portion, the second portion, and the second portion, in which the first application, which is the application of the first fluctuation voltage fluctuating due to the above, is applied to the first terminal. With a third part that supplies the received power,
The power feeding device includes a fourth portion that applies a second application, which is a predetermined DC voltage application, to the third terminal when the first terminal and the third terminal are electrically disconnected, and the third terminal. When the first determination result that the voltage of is a DC voltage higher than a predetermined threshold is obtained, the first electrical connection between the first terminal and the third terminal and the second terminal are obtained. Second, it outputs the first information indicating that the second electrical connection between the terminal and the fourth terminal is made together, and the voltage of the third terminal is the second variable voltage that fluctuates with the passage of time. A fifth part that outputs the second information indicating that the processing is being performed when the determination result is obtained, and a power supply to the fourth terminal when the fifth part outputs the first information. It is equipped with a sixth part that can supply power to the fourth terminal.
Power supply system.

(Appendix A1.1)
The power feeding system according to Appendix A1, wherein the first fluctuation voltage fluctuates in the first cycle.

(Appendix A1.2)
The power feeding system according to Appendix A1.1, wherein the second fluctuating voltage fluctuates in the second cycle.

(Appendix A1.3)
The power feeding system according to Appendix A1.2, wherein the first cycle and the second cycle are equal.

(Appendix A2)
The power feeding system according to Supplementary A1.2 or A1.3, wherein the second determination result includes a determination result that the first cycle and the second cycle are equal to each other.

(Appendix A3)
The power supply system according to Supplementary A1 to Supplementary A2, wherein the process is performed by the second portion by the power supply.

(Appendix A4)
The power feeding system according to any one of Supplementary A1 to Supplementary A3, wherein the first application is via a capacitor having a predetermined capacitance.

(Appendix A5)
The power supply system according to any one of Supplementary A1 to Supplementary A4, wherein the first portion is a switching unit for switching the presence or absence of grounding.

(Appendix A6)
The sixth part is the power supply system according to any one of Supplementary A1 to Supplementary A5, which performs power supply to the fourth terminal when the fifth part outputs the first information.

(Appendix A7)
The sixth part is the power supply system according to Supplementary A6, which starts the fourth terminal power supply when the fifth part does not output the second information.

(Appendix A8)
The sixth part is the power supply system according to the appendix A7, which starts the operation when the third determination result is further obtained.

(Appendix A9)
The sixth portion is the power feeding system according to Supplementary A8, which stops the feeding of the fourth terminal when the fourth determination result is further obtained.

(Appendix A10)
The sixth part is the power supply system according to Appendix A9, which stops the second part when the fifth part does not output the second information.

(Appendix A11)
The sixth part is the power supply system according to the appendix A10, which restarts the power supply to the fourth terminal after the stop.

(Appendix A12)
Any of Supplementary A1 to Supplementary A11, wherein the first electrical connection and the second electrical connection, and the disconnection of the first electrical connection and the disconnection of the second electrical connection are performed at the connection portion. The power supply system described in Kaichi.

(Appendix A13)
The connection portion is a power supply system which is a combination of the connector and the receiver described in the appendix A12.

(Appendix A14)
The power feeding system according to any one of Supplementary A1 to Supplementary A11, wherein the notification signal is a signal synchronized with the synchronization signal related to the processing.

(Appendix B1)
A voltage application unit that applies a predetermined DC voltage to the second terminal,
When the first determination result that the voltage of the first terminal is equal to or less than a predetermined threshold is obtained, the third terminal is grounded when power supply is not performed and an AC voltage is applied when performing a predetermined process. The first electrical connection between the first terminal and the third terminal and the second electrical connection between the second terminal and the fourth terminal provided by the power receiving device including the fourth terminal to receive the power supply are made together. When the first information indicating that the power is being generated is output and the second determination result that the voltage of the first terminal is an AC voltage is obtained, the second information indicating that the power receiving device is operating is output. Output, detector,
A power supply unit that can supply power to the second terminal,
Power supply device equipped with.

(Appendix B2)
The power feeding device according to Appendix B1, wherein the second determination result is a determination result that the voltage cycle of the third terminal and the voltage cycle of the first terminal are equal.

(Appendix C1)
When power is not supplied, ground the first terminal and
When performing a predetermined process, the first application, which is the application of the first AC voltage to the first terminal, is performed, and the power supplied to the fourth terminal is supplied to the ground, the process, and the first. Supply to each of the parts where each of the applications is made,
A second application, which is the application of a predetermined DC voltage, is performed on the first terminal.
When the first determination result that the voltage of the first terminal is equal to or less than a predetermined threshold value is obtained, the first electrical connection between the first terminal and the third terminal and the second terminal and the fourth terminal are connected to each other. Outputs the first information indicating that the second electrical connection is made together,
When the second determination result that the voltage of the first terminal is the second AC voltage is obtained, the second information indicating that the processing is being performed is output.
Power is supplied to the second terminal in a predetermined case.
Power supply method.

100, 100x power supply system 101, 101x power supply device 111, 113b, 221 processing unit 112 power supply unit 113 detection unit 113a measurement unit 202, 202x power receiving device 212 operating unit 232 power receiving unit 233 notification unit 234 switching unit 235 capacitor 301 connection unit A, B, C, D, E, F, G, H, I, J, K, L, M, N terminals a, b, c, d, e, f, g Timing

Claims (10)

Equipped with a power receiving device and a power feeding device,
In the power receiving device, the first part for grounding the first terminal when the second terminal power supply, which is the power supply to the second terminal, is not performed, and the grounding is released and the time elapses when performing a predetermined process. The second terminal power supply is supplied to the second portion, the first portion, the second portion, and the second portion, in which the first application, which is the application of the first fluctuation voltage fluctuating due to the above, is applied to the first terminal. With a third part that supplies the received power,
The power feeding device includes a fourth portion that applies a second application, which is a predetermined DC voltage application, to the third terminal when the first terminal and the third terminal are electrically disconnected, and the third terminal. When the first determination result that the voltage of is a DC voltage higher than a predetermined threshold is obtained, the first electrical connection between the first terminal and the third terminal and the second terminal are obtained. Second, it outputs the first information indicating that the second electrical connection between the terminal and the fourth terminal is made together, and the voltage of the third terminal is the second variable voltage that fluctuates with the passage of time. When the determination result is obtained, the fifth part that outputs the second information which is the information indicating that the power receiving device is in the state of performing the processing, and the fifth part output the first information. In some cases, a sixth portion capable of supplying power to the fourth terminal, which is the power supply to the fourth terminal, is provided.
Power supply system. The determination result that the first fluctuation voltage fluctuates in the first cycle, the second fluctuation voltage fluctuates in the second cycle, and the second determination result is equal to the first cycle and the second cycle. The power supply system according to claim 1. The power supply system according to claim 1 or 2, wherein the process is performed by the second part by the power supply. The power feeding system according to any one of claims 1 to 3, wherein the first application is via a capacitor having a predetermined capacitance. The power supply system according to any one of claims 1 to 4, wherein the first portion is a switching unit for switching the presence or absence of grounding. The power supply system according to any one of claims 1 to 5, wherein the sixth portion supplies power to the fourth terminal when the fifth portion outputs the first information. The power supply system according to claim 6, wherein the sixth portion starts power supply to the fourth terminal when the fifth portion does not output the second information. 7. The sixth portion performs the start when a third determination result, which is a determination result indicating that both the first electric connection and the second electric connection are made, is obtained. The power supply system described in. The sixth portion is a case where a fourth determination result, which is a determination result indicating that the process is not performed , is obtained based on the change in the second variable voltage caused by the completion of the process. The power supply system according to claim 8, wherein the power supply to the fourth terminal is stopped. Of claims 1 to 9, the first electrical connection and the second electrical connection, as well as the disconnection of the first electrical connection and the disconnection of the second electrical connection are performed at the connection portion. The power supply system described in any one of.

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