JP2011253665A - Outlet for dc power supply, dc power supply control unit, dc power supply control program, and dc power supply control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an outlet for DC power supply which can reduce power loss incident to power supply, and to provide DC power supply control unit, control program and control method.SOLUTION: The outlet 100 for DC power supply has a DC-DC converter 140 which converts a voltage from a DC power supply source 10 into a voltage of a designated value. The outlet 100 for DC power supply receives multiple types of apparatus side efficiency information indicating power conversion efficiency of apparatus connected to a female terminal 111, or the like, from the DC power supply plugs of the apparatus. The outlet 100 for DC power supply has a DC power supply controller 180 which stores multiple pieces of outlet side efficiency information indicating power conversion efficiency of the outlet 100 for DC power supply. The DC power supply controller 180 designates a designation value, for reducing power supplied from the DC power supply source 10 to the DC-DC converter 140 based on the multiple types of apparatus side efficiency information and multiple pieces of outlet side efficiency information, to the DC-DC converter 140.

Description

  The present invention relates to a DC power supply outlet, a DC power supply control device, a DC power supply control program, and a DC power supply control method.

  In order to change the voltage supplied to the device according to the compatible voltage of the connected device, acquire the appropriate voltage value information indicating the compatible voltage of the device from the plug connection part to which the male plug is connected, and acquire the acquired A DC outlet that changes the voltage supplied to the connected device based on voltage value information has been proposed (see, for example, Patent Document 1).

JP 2009-151947 A

  Here, in the technique disclosed in Patent Document 1, power conversion efficiency is achieved because power can be supplied regardless of the value of the adaptable voltage as long as the voltage supplied by the outlet can be converted into the adaptable voltage of the device. There is a problem that the power loss due to the power feeding cannot be reduced.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a DC power supply outlet, a DC power supply control device, a DC power supply control program, and a DC power supply control method that can reduce power loss associated with power supply. To do.

In order to achieve the above object, an outlet for direct current power supply according to the first aspect of the present invention is:
A DC power supply outlet having a voltage conversion unit that converts a voltage supplied from a power supply source into a specified value voltage,
A female terminal to which the voltage converted by the voltage converter is applied;
Information receiving means for receiving a plurality of device side efficiency information representing the power conversion efficiency of a device having a DC power supply plug inserted into the female terminal from the DC power supply plug;
Information storage means for storing a plurality of outlet side efficiency information representing the power conversion efficiency of the DC power supply outlet,
Supply power supplied from the power supply source to the voltage converter based on the plurality of device side efficiency information received by the information receiving unit and the plurality of outlet side efficiency information stored in the information storage unit Voltage value designating means for designating a designated value to decrease the voltage conversion unit,
It is characterized by that.

In order to achieve the above object, a DC power supply control device for a DC power supply outlet according to the second aspect of the present invention comprises:
A DC power supply control device for a DC power supply outlet having a voltage conversion unit that converts a voltage supplied from a power supply source into a voltage of a specified value,
Information acquisition means for acquiring a plurality of device-side efficiency information representing the power conversion efficiency of a device having a DC power supply plug inserted into the female terminal;
Information storage means for storing a plurality of outlet side efficiency information representing the power conversion efficiency of the DC power supply outlet,
Supply power supplied from the power supply source to the voltage converter based on the plurality of device side efficiency information received by the information acquisition unit and the plurality of outlet side efficiency information stored in the information storage unit Voltage value designating means for designating a designated value to decrease the voltage conversion unit,
It is characterized by that.

In order to achieve the above object, a DC power supply control program for a DC power supply outlet according to a third aspect of the present invention includes:
A DC power supply control program for a DC power supply outlet having a voltage converter that converts a voltage supplied from a power supply source into a voltage of a specified value,
Computer
Information acquisition means for acquiring a plurality of device-side efficiency information representing the power conversion efficiency of a device having a DC power supply plug inserted into the female terminal;
Information storage means for storing a plurality of outlet side efficiency information representing the power conversion efficiency of the DC power supply outlet,
Supply power supplied from the power supply source to the voltage converter based on the plurality of device side efficiency information received by the information acquisition unit and the plurality of outlet side efficiency information stored in the information storage unit The specified value for decreasing the voltage is allowed to function as a voltage value specifying means for specifying to the voltage converter,
It is characterized by that.

In order to achieve the above object, a DC power supply control method for a DC power supply outlet according to a fourth aspect of the present invention includes:
A DC power supply control method for a DC power supply outlet having a voltage conversion unit that converts a voltage supplied from a power supply source into a voltage of a specified value,
An application step of applying a voltage converted by the voltage converter to a female terminal;
An information receiving step of receiving a plurality of device-side efficiency information representing the power conversion efficiency of a device having a DC power supply plug inserted into the female terminal from the DC power supply plug;
An information reading step of reading a plurality of outlet-side efficiency information from information storage means for storing a plurality of outlet-side efficiency information representing the power conversion efficiency of the DC power supply outlet;
Supply supplied from the power supply source to the voltage converter based on the plurality of device side efficiency information received in the information receiving step and the plurality of outlet side efficiency information read in the information reading step A voltage value designating step of designating a designated value for reducing power to the voltage conversion unit,
It is characterized by that.

  According to the DC power supply outlet, the DC power supply control device, the DC power supply control program, and the DC power supply control method according to the present invention, it is possible to reduce power loss due to DC power supply.

FIG. 1A is a diagram illustrating an example of a DC power supply system including the DC power supply outlet according to the first embodiment. FIG. 1B is a diagram illustrating an example of a side cross section of a DC power supply outlet and a side cross section of a DC power supply plug that are electromagnetically coupled. FIG. 1C is a diagram illustrating an example of a side cross section of a DC power supply outlet and a side cross section of a DC power supply plug that are not electromagnetically coupled. FIG. 2A is a diagram illustrating an example of a circuit configuration of a DC power supply plug. FIG. 2B is a perspective view showing an example of a DC power supply plug. FIG. 2C is a perspective view illustrating an example of a main body portion included in the DC power supply plug. It is a figure showing an example of the circuit structure of the outlet socket for direct current power supply. FIG. 4A is a hardware configuration diagram illustrating an example of a DC power supply control device for a DC power supply outlet according to the first embodiment. FIG. 4B is a software configuration diagram illustrating an example of a function of the DC power supply control device. It is a flowchart showing an example of the voltage control process which a direct-current power supply control apparatus performs. It is a sequence diagram showing an example of the process which a DC power supply system performs. FIG. 7A is a diagram illustrating an example of authentication data transmitted by the DC power supply plug. FIG. 7B is a diagram illustrating an example of a device-side efficiency table transmitted by the DC power supply plug. FIG. 7C is a diagram illustrating an example of mode information transmitted by the DC power supply plug. FIG. 8A is a flowchart illustrating an example of grid voltage value determination processing executed by the current value calculation unit. FIG. 8B is a flowchart illustrating an example of second current value calculation processing executed by the current value calculation unit. 5 is a flowchart illustrating an example of a voltage value selection process executed by a current value calculation unit in the first embodiment. FIG. 10A is a diagram illustrating an example of the outlet-side efficiency table stored in the DC power supply control device of the DC power supply outlet. FIG. 10B is a diagram illustrating an example of the relationship between the power conversion efficiency and the input voltage. FIG. 10C is a diagram illustrating an example of the relationship between the wiring loss and the current flowing through the wiring. FIG. 10D is a diagram illustrating an example of a relationship between power conversion efficiency and load power. FIG. 10E is a diagram illustrating an example of the relationship between the power conversion efficiency and the output voltage. It is a figure showing an example of the circuit structure of the plug for direct current power supply in the modification of 1st Embodiment. In 2nd Embodiment, it is a flowchart showing an example of the voltage value selection process which a current value calculation part performs.

  Hereinafter, the outlet for direct current power supply concerning the embodiment of the present invention is explained, referring to an accompanying drawing.

<First Embodiment>
As shown in FIG. 1, the DC power supply outlet 100 according to the first embodiment (hereinafter simply referred to as power supply outlet 100) includes DC power supply plugs 201 and 202 (hereinafter simply referred to as power supply plugs 201 and 202). A direct current is supplied to an electronic device (hereinafter simply referred to as a device) 301 having a power supply plug 201 and a device 302 having a power supply plug 202 inserted therein. The power supply outlet 100 changes the voltage value of the voltage applied to the devices 301 and 302 to an appropriate value, so that the power supply outlet 100 and the DC power supply system 1 configured by the devices 301 and 302 (hereinafter simply referred to as a power supply system). 1)) to reduce power consumption.

  Before describing the power supply outlet 100, the power supply plug 201 and the device 301 will be described. Note that the configurations of the power supply plug 202 and the device 302 are the same as the configurations of the power supply plug 201 and the device 301, and a description thereof will be omitted.

  As shown in FIG. 2A, the power supply plug 201 includes male terminals 211, 221, and 231, a rectifying element 251, a drive circuit 261, a reception circuit 271, and a coil 291. The device 301 includes a DCDC (Direct Current-Direct Current) converter 341, a rectifier element 351, and a control device 381.

  The male terminal 211, the male terminal 221, and the male terminal 231 are inserted into the positive female terminal, the negative female terminal, and the ground female terminal of the power supply outlet 100, respectively. The male terminal 211 to the male terminal 231 are electrically connected to the DCDC converter 341 of the device 301 through a conductive wire in the electric cord.

  The DCDC converter 341 converts the power supplied from the power supply outlet 100 via the male terminal 211 and the male terminal 221 into power suitable for the operation of the device 301, and supplies the converted power to the control device 381 and the like. Note that the DCDC converter 341 may supply power to the drive circuit 261 and the reception circuit 271 of the power supply plug 201.

  The rectifying element 251 causes the current generated by the electromagnetic coupling between the coil 291 and the power supply outlet 100 among the current flowing through the electric circuit connecting the drive circuit 261 and the coil 291 to flow to the rectifying element 351 of the device 301. The rectifying element 351 outputs the current flowing from the rectifying element 251 to the control device 381.

  The control device 381 drives the drive circuit 261 using the current output from the rectifying element 351. As a result, the control device 381 causes the coil 291 to transmit a request signal for requesting the power supply outlet 100 to start power supply via the male terminals 211 and 221. Note that the drive circuit 261 may also be driven using the current output from the rectifying element 351. Thereafter, when power supply via the male terminals 211 and 221 is started, the control device 381 operates using electric power supplied from the DCDC converter 341 connected to the male terminals 211 and 221.

  The drive circuit 261 is controlled by the control device 381 to drive the coil 291. The driven coil 291 transmits various signals to the power supply outlet 100.

  According to these configurations, even if the power supply plug 201 does not store electricity in advance, or before the power supply amount of the power supply plug 201 is at least supplied from the female terminals 211 to 231, the power supply outlet 100 is electromagnetically coupled. A signal can be transmitted using the supplied power. Further, according to these configurations, the power supply plug 201 starts transmission of a signal using electric power supplied by electromagnetic coupling with the power supply outlet 100, so that the power supply plug 201 is not in contact with the power supply outlet 100. The power consumption of the power supply plug 201 and the device 301 when not coupled can be reduced.

  The control device 381 is, for example, a microcomputer, and determines whether or not the current value of the current output from the rectifying element 351 has reached a predetermined value. When determining that the current value has reached a predetermined value, the control device 381 determines that the power supply plug 201 has started electromagnetic coupling with the power supply outlet 100. If it is determined that the electromagnetic coupling has been started, the control device 381 drives the drive circuit 261 in order to transmit the request signal to the coil 291. In addition, when the coil 291 receives a signal, the control device 381 acquires the received signal from the reception circuit 271.

  As shown in FIG. 3, the power supply outlet 100 includes two power supply connectors 101 and 102, a DCDC (Direct Current-Direct Current) converter 140, and a DC power supply control device 180 of the present invention (hereinafter simply referred to as a power supply control device). 180). The power supply connector 101 includes a positive female terminal 111, a negative female terminal 121, a ground female terminal 131, a semiconductor switch 151, a drive circuit 161, a reception circuit 171, and a coil 191. Similarly, the power supply connector 102 includes a positive female terminal 112, a negative female terminal 122, a ground female terminal 132, a semiconductor switch 152, a driving circuit 162, a receiving circuit 172, and a coil 192.

  The female terminal 111 is inserted with the male terminal 211 of the power supply plug 201 and is connected to the plus terminal of the DCDC converter 140 via the semiconductor switch 151. Similarly, the male terminal 212 of the power supply plug 202 is inserted into the female terminal 112 and connected to the plus terminal of the DCDC converter 140 via the semiconductor switch 152.

  The male terminal 221 of the power supply plug 201 is inserted into the female terminal 121 and is connected to the negative terminal of the DCDC converter 140. For this reason, when the semiconductor switch 151 closes the electric circuit (that is, drives), the female terminals 111 and 121 supply power to the power supply plug 201, and the semiconductor switch 151 opens the electric circuit (that is, stops driving). ), The female terminals 111 and 121 stop supplying power to the power supply plug 201. Similarly, the male terminal 222 of the power supply plug 202 is inserted into the female terminal 122 and connected to the negative terminal of the DC converter 140. For this reason, when the semiconductor switch 152 closes the electric circuit, the female terminals 112 and 122 supply power to the power supply plug 202.

  The female terminals 131 and 132 are inserted with the male terminal 231 of the power supply plug 201 and the male terminal of the power supply plug 202, respectively, and provide a reference potential to the power supply plugs 201 and 202.

  The DCDC converter 140 is connected to a plus terminal and a minus terminal of a DC (Direct Current) power supply source 10 and generates electric power to be supplied to the power supply control device 180. The DCDC converter 140 is a voltage conversion unit that converts a voltage applied from the DC power supply source 10 into a voltage having a voltage value specified by the power supply control device 180 (hereinafter referred to as a specified value). A voltage is applied to the female terminals 111 and 121. The drive circuits 161 and 162 and the reception circuits 171 and 172 may be supplied with power from the DCDC converter 140.

  When the semiconductor switches 151 and 152 are driven by the power supply control device 180, the DCDC converter 140 and the female terminals 111 and 121 are electrically connected to each other, and when the drive is stopped by the power supply control device 180, the DCDC converter 140. And the female terminals 111 and 121 are electrically disconnected from each other. According to these configurations, when the power supply outlet 100 is connected to the power supply plug 201 or 202 in a non-contact manner, power supply to the female terminals 111 and 121 is started. Therefore, for example, even if an object other than the male terminal of the power supply plug 201 or 202 is inserted into the female terminal 111 or the like, the power supply outlet 100 does not supply power unless it is connected to the power supply plug 201 or 202 in a non-contact manner. Since it does not start, safety can be ensured more than before.

  The drive circuits 161 and 162 are controlled by the power supply control device 180 to drive the coils 191 and 192, respectively. The driven coils 191 and 192 are electromagnetically coupled to the power supply plugs 201 and 202, respectively, and transmit signals to the power supply plugs 201 and 202. Further, the coils 191 and 192 receive signals transmitted from the power supply plugs 201 and 202, respectively, during a period in which the coils 191 and 192 are not driven (hereinafter referred to as a “rest period”). According to this configuration, the power supply connector 101 can perform both power transmission by electromagnetic coupling to the power supply plug 201 and signal communication with the power supply plug 201. Note that the receiving circuits 171 and 172 receive signals from the coils 191 and 192, respectively, during the oscillation period.

  The power supply control device 180 is a microcomputer as shown in FIG. 4A has a CPU (Central Processing Unit) 180a, a RAM (Random Access Memory) 180b, a ROM (Read Only Memory) 180c, and an I / O (Input / Output) port. The CPU 180a performs overall control of the power supply outlet 100 by executing software processing represented by a program stored in the ROM 180c. The RAM 180b temporarily stores data to be processed when the CPU 180a executes software processing. The I / O port inputs the signals output from the receiving circuits 171 and 172 of FIG. 3 to the CPU 180a, and outputs the signals output from the CPU 180a to the semiconductor switches 151 and 152 and the driving circuits 161 and 162.

  Next, software processing executed by the CPU 180a will be described. The CPU 180 a executes a voltage control process for controlling the voltage applied to the power supply plugs 201 and 202 connected to the power supply outlet 100. In this voltage control process, the voltage of the voltage output from the power supply outlet 100 so that the current value of the current supplied from the DC power supply source 10 to the power supply system 1 (hereinafter referred to as the first current value) is minimized. This is a process for controlling the value. Since the DC power supply source 10 applies a constant voltage to the power supply outlet 100, if the current supplied from the DC power supply source 10 to the power supply outlet 100 is minimized, the power is supplied to the power supply system 1. This is because the power is minimized and the power consumed by the power feeding system 1 is minimized.

  The CPU 180a executes a voltage control process as shown in FIG. 5, so that the coupling detection unit 181, the information acquisition unit 182, the power supply determination unit 183, the transmission control unit 184, and the switch drive unit as shown in FIG. 185, a mode change determination unit 186, an information storage unit 187, a current value calculation unit 188, and a voltage value designation unit 189.

First, the voltage control process of FIG. 5 will be described by taking as an example a case where the power supply plug 201 of the device 301 is inserted into the power supply connector 101 of the power supply outlet 100.
When the execution of the voltage control process is started, the coupling detection unit 181 in FIG. 4B causes the power supply plug 201 to be connected to the power supply connector based on the output voltage of the reception circuit 171 included in the power supply connector 101 in FIG. 101 is detected to start electromagnetic coupling (step S01; Yes).

  Next, the information acquisition unit 182 in FIG. 4B acquires authentication data from the reception circuit 172 (step S02). As illustrated in FIG. 6, the device 301 that has detected the electromagnetic coupling transmits authentication data, which is an example of a request signal, at time t1.

  Next, the power supply determination unit 183 in FIG. 4B extracts the authentication code of the device 301 from the authentication data as shown in FIG. Here, since the authentication code is performance information indicating the performance of the device 301, the power supply determination unit 183 determines whether the device 301 has sufficient performance to operate using a direct current based on the authentication code. Determine. When determining that the device 301 has sufficient performance, the power supply determination unit 183 determines that the device 301 has cleared the power supply authentication. The power supply outlet 100 does not supply power to devices that do not clear the authentication. According to this configuration, since the power supply outlet 100 does not supply power to an electronic device that cannot operate sufficiently with a direct current, failure of the electronic device connected to the power supply outlet 100 can be prevented in advance. Can improve safety.

  Specifically, the power supply determination unit 183 determines that the device 301 converts the direct current when the device 301 is a direct current device, or when the device 301 is an alternating current device but can convert direct current to alternating current using an inverter. Determine that it has sufficient performance to operate with.

  In addition, the power supply determination unit 183 not only has sufficient performance for the device 301 to operate using direct current, but also has sufficient performance (that is, energy saving performance) to reduce the consumption of direct current. A configuration can be adopted in which the device 301 determines that the authentication is cleared. In this configuration, when the device 301 has a standby mode, or when the device 301 has a DCDC converter in which the power conversion efficiency (hereinafter referred to as power conversion efficiency) changes when the voltage value of the applied voltage changes, power supply is performed. The determination unit 183 may determine that the device 301 clears authentication. The operation mode refers to an operation state of the electronic device, and the standby mode refers to a state where an operation instruction or an operation operation is waited for by a user in a state in which power consumption is reduced as compared with operation. The power conversion efficiency refers to the ratio of output power to input power. According to these configurations, the power supply outlet 100 can supply power only to an electric device that can reduce power consumption by changing the voltage value of the voltage to be supplied. Electric power can be reduced more than before.

  Here, the authentication code of the device 301 shown in FIG. 7A indicates that the device 301 is a DC device, does not have an inverter, has a standby mode, and has a DCDC converter. 183 determines that the device 301 has cleared the authentication (step S03 in FIG. 5; Yes). When determining that the authentication is not cleared, the power feeding determination unit 183 returns to step S01 and repeats the above processing.

  Next, the transmission control unit 184 in FIG. 4B performs drive control of the drive circuit 161 in FIG. 3 in order to cause the coil 191 to return an approval response indicating that power supply is approved (permitted) because the authentication is cleared. Is performed (step S04). Thereafter, the switch driving unit 185 in FIG. 4B performs drive control of the semiconductor switch 151 in FIG. 3 (step S05). Thereafter, as shown in FIG. 6, at time t <b> 2, the power supply plug 201 starts power supply after receiving an approval response from the power supply outlet 100.

  Next, the current value calculation unit 188 in FIG. 4B determines a grid voltage value used for calculating the power conversion efficiency of the power feeding system from among the voltage values that can cause the device 301 to operate. A grid voltage value determination process as shown in FIG.

  When the execution of the grid voltage value determination process in FIG. 8A is started, the current value calculation unit 188 determines the rated voltage “200” volts based on the rated voltage data “0x00CB” included in the authentication data in FIG. Is acquired (step S21). Next, the current value calculation unit 188 acquires the lowest voltage “100” volts at which the device 301 operates based on the voltage lower limit data “0x0190” of the authentication data (step S22). Thereafter, the current value calculation unit 188 acquires the highest voltage “400” volts at which the device 301 operates based on the voltage upper limit data “0x0064A” of the authentication data (step S23).

  Next, the current value calculation unit 188 calculates the difference between the lowest voltage and the rated voltage (hereinafter simply referred to as the lower input voltage range) “100” volts and the difference between the highest voltage and the rated voltage (hereinafter simply referred to as the upper voltage range). “200” volts (which is called the input voltage range) is more than “100” volts in both cases, so the voltage value from the lowest voltage “100” volts to the highest voltage “400” volts is the rated voltage “200” volts. Engrave in increments of “50” bolts. In this way, the current value calculation unit 188 determines “100”, “150”, “200”, “250”, and “300” volts as voltage 1 to voltage 5 that are grid voltages, respectively (Step). S24). Thereafter, the current value calculation unit 188 ends the execution of the grid voltage value determination process. The current value calculation unit 188 calculates the voltage value in increments of “20” volts when the lower input voltage range or the upper input voltage range is smaller than “100” volts. And decide.

  After step S06 in FIG. 5 is executed, the information acquisition unit 182 in FIG. 4B acquires a device-side efficiency table as shown in FIG. 7B from the reception circuit 171 in FIG. 3 (step S07). ). The power supply plug 201 that has received the approval response is controlled by the device 301 to transmit a device-side efficiency table representing the power conversion efficiency of the device 301 to the power supply connector 101. The device-side efficiency table is stored in the ROM that constitutes the control device 381 of the device 301.

  The apparatus-side efficiency table of FIG. 7B has an operation mode column, a current maximum value column, an average power column, and an efficiency of 5 columns from one example. In the operation mode column, a number indicating the operation mode of the device 301 is stored. The maximum current value column is flowed to the device 301 in the operation mode represented by the number stored in the operation mode column of the same row, so that the device 301 operates normally (that is, the device 301 is acceptable). Information representing the maximum value of the current is stored. The average power column is the average power consumed when the device 301 in the operation mode represented by the number stored in the operation mode column of the same row is supplied with the rated voltage “200” volts (that is, the average power consumption). ) Is stored.

  Further, the efficiency 1 column indicates that the voltage 301 determined in FIG. 1 is changed to a voltage value suitable for the device 301 to operate in the operation mode represented by the number stored in the operation mode column of the same row. The information indicating the power conversion efficiency of the device 301 when the DCDC converter 341 performs conversion is stored. In the efficiency 2 example to the efficiency 5 example, information indicating the power conversion efficiency in the case of converting the voltage 2 to the voltage 5 in the same manner is stored.

  After the execution of step S07 in FIG. 5 ends, the coupling detection unit 181 does not detect the start of a new electromagnetic coupling (step S01; No). This is because a new power supply plug is not inserted into the power supply outlet 100.

  Next, the information acquisition unit 182 in FIG. 4B determines that the reception circuit 171 has received the mode information from the power supply plug 201 based on the output voltage of the reception circuit 171 (step S08; Yes). The mode information refers to information indicating the operation mode of the device. Thereafter, the information acquisition unit 182 acquires mode information from the reception circuit 171 (step S09). This is because the power supply plug 201 of the device 301 transmits the mode information to the power supply connector 101 in order to notify the operation mode of the device 301 at time t3 as shown in FIG.

  Next, the power supply determination unit 183 extracts the authentication code from the mode information as illustrated in FIG. 7C, and determines that the device 301 has cleared the authentication based on the extracted authentication code (step S10; Yes). ). When determining that the authentication is not cleared, the power feeding determination unit 183 returns to step S01 and repeats the above processing.

  Next, the mode change determination unit 186 in FIG. 4B acquires the number “4” representing the operation mode from the mode information in FIG. 7C (step S11). Next, the mode change determination unit 186 changes the operation mode of the device 301 by comparing the operation mode represented by the acquired number “4” with the previous operation mode acquired before a predetermined time. It is determined whether or not it has been done (step S12). Here, since the mode change determination unit 186 has acquired the operation mode for the first time this time, it is considered that the operation mode of the device 301 has changed (step S12; Yes).

  Next, the current value calculation unit 188 executes a voltage value selection process as shown in FIG. 9 for selecting the voltage value of the voltage applied to the power supply plugs 201 and 202 connected to the power supply outlet 100 (step S13). ).

  When the execution of the voltage value selection process of FIG. 9 is started, the current value calculation unit 188 minimizes the first current from the outlet side efficiency table of FIG. 10A stored in the information storage unit 187 of FIG. Voltage values (hereinafter simply referred to as candidate voltage values) “100”, “150”, “200”, “250”, and “300” are acquired, and the obtained candidate voltage values It is determined that the first current value is not calculated for all (step S31 in FIG. 9; No). This is because the current value calculation unit 188 has never executed the process of step S31.

  The first current value with respect to the candidate voltage value is a case where the designated value of the DCDC converter 140 of FIG. 3 is the candidate voltage value (that is, the value of the output voltage of the power supply outlet 100 is the candidate voltage value). ), The current value of the current supplied from the DC power supply source 10 to the DCDC converter 140 (that is, the power supply outlet 100).

  Next, the current value calculation unit 188 sets the first candidate voltage value “100” volts, which is one of the candidate voltage values that have not been used for the calculation of the first current value, as the processing target in steps S32 to S40. Voltage value (hereinafter simply referred to as a target voltage value) (step S32). Next, the current value calculation unit 188 assigns a value “0” to the parameter that stores the total second current value and clears it (step S33). Here, the total second current value is the current value of the current supplied by the power supply outlet 100 to the connected device when the power supply outlet 100 supplies the voltage of the target voltage value (hereinafter, the second current value). Is the sum of all connected devices.

  Next, the current value calculation unit 188 determines that the second current value is not calculated for all connected devices (step S34; No). This is because the current value calculation unit 188 has never executed the process of step S34. Next, the current value calculation unit 188 selects the device 301 that is one of the devices for which the second current value has not been calculated as a device to be processed in steps S35 to S37 (hereinafter, referred to as a target device) ( Step S35). Next, the current value calculation unit 188 executes a second current calculation process as shown in FIG. 8B for calculating the second current value of the target device (step S36).

  When the execution of the second current calculation process in FIG. 8B is started, the current value calculation unit 188 determines that the target voltage value “100” volts is the voltage lower limit (that is, the minimum voltage) acquired in step S22 in FIG. ) Value “100” volts or more (step S51; Yes). Next, the current value calculation unit 188 determines that the target voltage value is “100” volts or less, which is equal to or lower than the value “400” volts of the voltage upper limit (that is, the maximum voltage) acquired in step S23 (step S52; Yes). .

  Next, based on the number “4” representing the operation mode acquired in step S11 of FIG. 5, the current value calculation unit 188 calculates the current value from the device-side efficiency table of the target device 301 as illustrated in FIG. When the rated voltage is applied to the device 301 in the operation mode, the average power “1800” watts consumed by the device 301 is acquired (step S53). Next, the current value calculation unit 188 divides the average power “1800” watts acquired in step S51 by the rated voltage “200” volts acquired in step S21 of FIG. Obtains an average current value “9” ampere of the current supplied to the device 301 when a voltage of rated voltage “200” volts is applied to the device 301 (step S54).

  Next, based on the rated voltage “200” volts and the number “4” indicating the operation mode, the current value calculation unit 188 causes the device 301 in the operation mode to supply the rated voltage “200” volts to the power supply outlet 100. The power conversion efficiency (hereinafter referred to as rated efficiency) “0.74” of the device 301 in the case of being supplied from the device is acquired from the device-side efficiency table of FIG. 7B (step S55). The value of the rated voltage is the same value as the grid voltage of 3 “200” volts.

  Next, based on the information “4” indicating the operation mode and the target voltage value “100” volts, the current value calculation unit 188 is supplied with the target voltage from the power supply outlet 100 by the device 301 in the operation mode. In this case, the power conversion efficiency (hereinafter referred to as target efficiency) “0.84” of the device 301 is acquired from the device-side efficiency table of FIG. 7B (step S56). The target voltage value is the same value as the voltage 1 “100” volts which is the grid voltage.

  Thereafter, the current value calculation unit 188 obtains the average current value “9” ampere calculated in step S54, the rated efficiency “0.74” acquired in step S55, and the step (S56) with respect to the following formula (1). By substituting the target efficiency “0.84”, the second current value “7.92” ampere of the target device 301 to which the target voltage “100” volts is applied is calculated (step S57).

Second current value = average current value x rated efficiency ÷ target efficiency (1)
However, the symbol “×” represents a multiplication symbol, the symbol “÷” represents a division symbol, and the symbol “=” represents an equal sign.

  Next, based on the number “4” representing the operation mode, the current value calculation unit 188 calculates the maximum current “20” ampere that can be tolerated by the device 301 in the operation mode, as shown in FIG. Obtained from the side efficiency table (step S58). Thereafter, the current value calculation unit 188 determines that the calculated second current value “7.9” ampere is equal to or less than the acquired maximum value “20” ampere (step S59; Yes), and second current value calculation processing The execution of is terminated.

  The current value calculation unit 188 determines that the target voltage value is smaller than the voltage lower limit (step S51; No), determines that the target voltage value is larger than the voltage upper limit (step S52; No), or second When it is determined that the current value is larger than the maximum current value (step S59; No), the target voltage value is deleted from the candidate voltage value (step S59), and then the execution of the second current value calculation process is terminated. This is because the device 301 does not operate normally even when the power supply outlet 100 supplies such a voltage value or current value to the device 301. According to this configuration, a voltage that exceeds the upper limit of the voltage that causes the device 301 connected to the power supply outlet 100 to operate normally or the voltage that falls below the lower limit that causes the device 301 to operate normally is applied, or a current that causes the device 301 to operate normally. It is possible to prevent a current exceeding the upper limit from being supplied.

  After the execution of step S36 in FIG. 9 is finished, the current value calculation unit 188 adds the second current value “7.9” ampere calculated in step S36 to the parameter storing the total second current value ( Step S37).

  Thereafter, the current value calculation unit 188 determines that the total second current value corresponding to the target voltage has been calculated for all the connected devices of the power supply outlet 100 (step S34; Yes). This is because only the device 301 is connected to the power supply outlet 100.

  Next, the current value calculation unit 188 calculates the load power “790” watts of the power supply outlet 100 by multiplying the total second current value “7.9” ampere by the target voltage value “100” volts (step S100). S38). The total second current value is the total current value of the currents supplied by the power supply outlet 100 to the connected device, and the target voltage value is the value of the voltage applied by the power supply outlet 100 to the connected device. This is because the load power is the total power supplied from the power supply outlet 100 to the connected device.

  Next, the current value calculation unit 188 is based on the load power “790” watts and the target voltage value “100” volts, and is stored in the information storage unit 187 in FIG. The power conversion efficiency “0.75” of the power supply outlet 100 is acquired from the efficiency table (step S39). Specifically, the current value calculation unit 188 includes the power conversion efficiency “0.69” associated with the load power “500” watts and the target voltage value “100” volts, the load power “1000” watts, and the target voltage value. Using the power conversion efficiency “0.79” associated with “100” volts, the value of the power conversion efficiency associated with the load power “790” watts and the target voltage value “100” volts is complemented. The power conversion efficiency is the power conversion efficiency of the power supply outlet 100 when the power supply outlet 100 converts the power supplied from the DC power supply source 10 into the power of “100” volts “790” watts.

  Thereafter, the current value calculation unit 188 divides the total second current value “7.9” ampere by the power conversion efficiency “0.75” of the power supply outlet 100, thereby obtaining the first current value “10.6” for the candidate voltage value “100” volts. The amperage is calculated (step S40).

  Here, the power conversion efficiency of the DCDC converter 140 included in the power supply outlet 100 shown in FIG. 3 is the power loss such as heat generated by the resistance component of the DCDC converter 140 (that is, the resistance of the wiring, components, and print pattern), and the DCDC. It depends on the switching loss of the semiconductor constituting the converter 140.

  As shown in FIG. 10B, the conversion efficiency of the DCDC converter 140 increases as the voltage value of the current input to the DCDC converter 140 decreases and increases as the load current of the DCDC converter 140 increases. However, as shown in FIG. 10C, the power loss due to the resistance component such as the wiring loss increases in proportion to the square of the current. Therefore, when the load current of the DCDC converter 140 increases, the power loss increases rapidly. To increase. For this reason, as shown in FIG. 10D, when the load power is increased to an extent, the power conversion efficiency of the DCDC converter 140 is not improved, and the power conversion efficiency vs. power characteristic becomes flat. On the other hand, when the current load is reduced, the switching loss of the semiconductor is more dominant than the loss due to the resistance component, so that the power conversion efficiency may be deteriorated depending on the circuit method and component selection. Here, as shown in FIG. 10E, when the input voltage to the DCDC converter 140 is set to a constant value, if the output voltage of the DCDC converter 140 is increased (that is, the voltage difference between the input and output of the DCDC converter 140 is increased). Increasing the power) improves the power conversion efficiency but does not significantly improve it.

  The characteristics of the power conversion efficiency of the DCDC converter 140 also apply to the DCDC converters of the devices 301 and 302. Therefore, the power supply outlet 100 does not predict the power conversion efficiency using a predetermined mathematical formula, but receives the device efficiency table stored in advance in the ROM in the manufacturing stage from the power supply plug and stores it by itself. The power conversion efficiencies of the DCDC converter 140 and the DCDC converter 341 are specified by reading out the outlet side efficiency table. For this reason, the power supply outlet 100 can be used not only for the power supply outlet 100 with a small amount of calculation, even when the specified value that is the output voltage value of the DCDC converter 140 is changed or the power supply plug to be connected is changed. The power conversion efficiency of the connected device connected to the power supply outlet 100 can be specified.

  After executing step S40 of FIG. 9, the current value calculation unit 188 determines that the first current value is not calculated for all candidate voltage values (step S31; No). This is because only the first current value for the first candidate voltage value is calculated. Thereafter, the current value calculation unit 188 executes the processing from step S32 to S40, thereby setting the second candidate voltage value “150” volts as the target voltage, the target efficiency “0.8”, and the total second current value “8.3”. After calculating the ampere, the load power “1249” watts, and the power conversion efficiency “0.77” of the power supply outlet 100, the first current value “10.8” is calculated using these values.

  Further, the current value calculation unit 188 further executes the processing of steps S31 to S40, thereby setting the third candidate voltage value “200” volts as the target voltage, the target efficiency “0.74”, and the total second current value “9”. After calculating the ampere, the load power “1800” watts, and the power conversion efficiency “0.73” of the power supply outlet 100, the first current value “12.3” is calculated using these values.

  In addition, the current value calculation unit 188 further executes the processing of steps S31 to S40 twice, and similarly calculates the first current value with the fourth candidate voltage value “250” volts as the target voltage, Similarly, the first current value is calculated with the candidate voltage value “300” volts as the target voltage.

  Thereafter, the current value calculation unit 188 determines that the first current value has been calculated for all the candidate voltage values (step S31; Yes). Next, the current value calculation unit 188 uses the first candidate voltage value “100” used for calculating the smallest first current value “10.6” ampere among the first currents calculated using the five candidate voltage values. "A bolt is selected (step S41). Thereafter, the current value calculation unit 188 ends the execution of the voltage value selection process.

  After the process of step S13 in FIG. 5 is executed, the voltage value specifying unit 189 in FIG. 4B uses the specified value selected in step S41 (hereinafter referred to as the selected specified value) as the DCDC of the power supply outlet 100. It designates to the designated value of the converter 140 (step S14). Accordingly, as illustrated in FIG. 6, at time t <b> 4, the power supply outlet 100 supplies power to the device 301 with a voltage value that maximizes the overall power conversion efficiency of the power supply system 1.

  According to these configurations, the power supply outlet 100 designates the designated value of the DCDC converter 140 so as to realize the power conversion efficiency that reduces the value of the current (first current value) supplied from the DC power supply source 10. Therefore, the power conversion efficiency including not only the power supply outlet 100 but also the connection device 301 connected to the power supply outlet 100 is improved. Therefore, the power supply outlet 100 can reduce power loss that occurs in both the power supply outlet 100 and the device 301 due to power supply to the device 301.

  Further, according to these configurations, the power supply outlet 100 uses the power conversion efficiency determined by the operation mode of the connected device 301 and the value of the voltage to which the device 301 is applied, to specify the specified value of the DCDC converter 140. The current value (that is, the first current value) supplied from the DC power supply source 10 is specified to be small. Here, the device normally repeats a night standby mode and a daytime operation mode within one day. In addition, since the voltage value suitable for the operation of the device is different between the standby mode and the operation mode, the power conversion efficiency of the device is different between the standby mode and the operation mode. For this reason, according to the operation mode of the connection apparatus 301, the power conversion efficiency including not only the power supply outlet 100 but also the apparatus 301 connected to the power supply outlet 100 can be further improved.

  After the process of step S14 is executed, step S01 is executed again. Thereafter, the information acquisition unit 182 determines that the mode information has been received from the power supply plug 201 (step S08; Yes). As shown in FIG. 6, the mode of the device 301 is changed to the standby mode represented by the number “1” at time t5.

  Thereafter, after the processing of steps S09 to S11 is executed, the mode change determination unit 186 in FIG. 4B performs the operation mode represented by the number “4” acquired last time and the number acquired this time. Since the operation mode represented by “1” is different, it is determined that the operation mode of the device 301 has changed (step S12; Yes).

  Thereafter, the process of step S13 is executed using the number “1” representing the changed operation mode. Next, the voltage value designating unit 189 designates the selected voltage value reselected in step S13 as the designated value of the DCDC converter 140 of the power supply outlet 100 (step S14). As a result, as shown in FIG. 6, at time t6, the power supply outlet 100 changes the power supply voltage to the voltage value selected again (that is, reviewed), and the power conversion efficiency of the entire power supply system 1 is improved. Continue to supply the highest power. According to these configurations, the time period in which most of the connected devices connected to the power outlet are normally in a standby state (standby mode), such as at night, and the time period in which there are many connected devices in an active state (operating mode), such as in the daytime. Thus, even if the power conversion efficiency of the connected device changes, not only the power conversion efficiency of the power supply outlet 100 but also the power conversion efficiency of the connected device, the power supply efficiency of the entire power supply system 1 A good power supply method can be selected.

  Thereafter, the coupling detection unit 181 in FIG. 4B detects that the power feeding plug 202 is electromagnetically coupled to the power feeding connector 102 (step S01; Yes). Next, as shown in FIG. 6, the information acquisition unit 182 acquires the authentication data transmitted from the power supply plug 202 at time t7 (step S02). Thereafter, the processes of steps S03 to S07 are performed on the power supply plug 202 and the device 302.

  After the process of step S07 is executed, step S01 is executed again. Thereafter, the information acquisition unit 182 determines that the mode information has been received from the power supply plug 202 (step S08; Yes). This is because the device 302 transmits the mode information representing the number “2” at time t9 as shown in FIG.

  Thereafter, the processing from step S09 to step S13 is executed. In the voltage selection process in step S13, a total second current value that is the sum of the second current value of the device 301 and the second current value of the device 302 is calculated. Thereafter, the voltage value designating unit 189 in FIG. 4B sets the selected voltage value that minimizes the first current value calculated using the total second current value as the designated value of the DCDC converter 140 (step S1). S14). Accordingly, as illustrated in FIG. 6, at time t <b> 10, the power supply outlet 100 supplies power that maximizes the power conversion efficiency of the entire power supply system 1 including not only the device 301 but also the devices 301 and 302. 302 can be supplied.

  After the process of step S14 is executed, steps S01 and S08 are executed. Thereafter, the coupling detection unit 181 in FIG. 4B detects that the electromagnetic coupling between the power feeding plug 202 and the power feeding connector 102 has been completed (step S15; Yes). Thereafter, the switch driving unit 185 in FIG. 4B stops the power supply to the power supply plug 202 by stopping the driving of the semiconductor switch 152 (step S16).

  Next, the coupling detection unit 181 determines that not all electromagnetic coupling has been completed (step S17; No). Thereafter, Step S13 is executed only for the device 301 having the power supply plug 201 that maintains the electromagnetic coupling with the power supply outlet 100. Next, the voltage value designating unit 189 sets the selection voltage value selected in step S13 in the DCDC converter 140 (step S14). According to these configurations, even when the configuration of the power feeding system 1 changes due to the insertion / removal of the power feeding plug, the output voltage value of the DCDC converter 140 (so that the power conversion efficiency of the whole power feeding system 1 is maximized ( That is, a specified value) can be specified.

  After the process of step S14 is executed, steps S01 and S08 are executed, and the coupling detection unit 181 detects that the electromagnetic coupling between the power supply plug 201 and the power supply connector 101 has ended (step S15; Yes). . Thereafter, the switch driving unit 185 in FIG. 4B ends the power supply to the power supply plug 201 by stopping the driving of the semiconductor switch 151 (step S16). Next, the coupling detection unit 181 terminates the execution of the voltage control process after determining that all the electromagnetic couplings are completed (step S17; No).

Next, an external configuration of the power supply plug 201 will be described.
As shown in FIG. 2B, the power supply plug 201 includes a main body 281 having the circuit of FIG. 2A and male terminals 211, 221 and 231, and a slide covering the upper surface and both side surfaces of the main body 281. And a cover 285.

  As shown in FIG. 2C, a guide hole 283 is formed on the upper surface of the main body 281, and male terminals 211, 221, and 231 protrude from the front of the main body 281.

  The rib of the slide cover 285 shown in FIG. 1B is inserted into the guide hole 283, and the slide cover 285 is guided to slide in the front-rear direction of the power supply plug 201. A storage space for storing the coil 291 is formed inside the main body 281, and a guide hole 283 is formed on the upper surface of the storage space. For this reason, the rib of the slide cover 285 protrudes from the upper surface of the storage space.

  A resin module 287 incorporating a coil 291 is stored in the storage space. The resin module 287 is swingably supported by a support shaft formed on the lower side of the resin module 287. Although not shown, the support shaft is provided with a torsion spring having one end locked to the resin module 287 and the other end locked to a front wall that defines a storage space.

  The resin module 287 is in a state of being tilted to the rear of the power supply plug 201 around the support shaft (hereinafter referred to as a rearward state) from a substantially upright state (hereinafter referred to as an upright state) with the front direction of the power supply plug 201 being forward. ). Here, since the resin module 287 incorporates the coil 291 so that the central axis of the coil 291 faces the front of the power supply plug 201 in the upright state, the central axis of the coil 291 is the power supply plug 201 in the rearward state. It is off diagonally upward from the front direction. In addition, since the central axis of the coils 191 and 192 of the power supply outlet 100 faces the front direction of the power supply outlet 100 (that is, the back surface direction of the power supply plug 201), the coils 191 and 192 of the power supply outlet 100 The coil 291 of the power supply plug 201 cannot be sufficiently electromagnetically coupled.

  Next, for example, when the user picks the slide cover 285 and performs an insertion operation of inserting the power supply plug 201 into the power supply connector 101, first, the male terminals 211 to 231 of the power supply plug 201 are connected to the female terminals of the power supply connector 101. Inserted into terminals 111-131. Next, when the insertion operation is continued, the slide cover 285 slides in the front direction relative to the main body 281.

  When the slide cover 285 slides in the front direction, the ribs of the slide cover 285 protruding from the ceiling of the storage space move the upper portion of the resin module 287 forward, so that the resin module 287 changes from the backward state to the upright state. That is, since the coil 191 and the coil 291 face each other, the power supply plug 201 starts electromagnetic coupling.

  According to these configurations, when the male terminals 211 to 231 of the power supply plug 201 are inserted into the power supply connector 101, the slide cover 285 slides in the insertion direction of the male terminals 211 to 231. For this reason, when the power supply plug 201 is inserted into the power supply connector 101, non-contact coupling with the power supply connector 101 can be started.

  Thereafter, for example, when the user picks up the slide cover 285 and performs an extraction operation of extracting the power supply plug 201 from the power supply connector 101, the slide cover 285 slides relatively in the rear surface direction with respect to the main body 281. When the slide cover 285 slides in the rear direction, the ribs of the slide cover 285 do not press the resin module 287, so that the resin module 287 is returned to the backward state by the restoring force of the torsion spring. For this reason, the coil 191 of the power supply outlet 100 and the coil 291 of the power supply plug 201 end electromagnetic coupling.

  According to these configurations, since the slide cover 285 covers the main body 281, the user grips the slide cover 285 and inserts the power supply plug 201 into the power supply connector 101. For this reason, the slide cover 285 reliably slides in the insertion direction of the male terminals 211 to 231 in accordance with the insertion operation. On the contrary, since the slide cover surely slides in the direction opposite to the insertion direction of the male terminals 211 to 231 (that is, the removal direction) in accordance with the removal operation, the contactless connection and the power supply are performed before the power supply plug 201 is removed. Can be terminated.

  In addition, according to these configurations, the user can start power supply to the power supply plug 201 by an insertion operation of inserting the power supply plug 201 into the power supply connector 101 and can perform an extraction operation to remove the power supply plug 201. Thus, since the power supply to the power supply plug 201 can be terminated, the convenience of the power supply connector 101 and the power supply plug 201 is improved.

<Modification>
The power supply plug 201 has a circuit configuration as shown in FIG. 2 and has been described as transmitting authentication data using a current generated by electromagnetic coupling. However, as shown in FIG. 11, the power supply plug 201 can further include a solar cell 343 and can employ a configuration in which authentication data is transmitted using the power generated by the solar cell 343. In this configuration, the power generated by the solar cell 343 is converted by the DCDC converter 341. Thereafter, the converted power is supplied to the control device 381, and the current generated by the converted power is rectified by the rectifier element 351 and then supplied to the drive circuit 261 and the reception circuit 271. Note that the power supply plug 201 may include a battery such as a dry battery instead of the solar battery 343.

Second Embodiment
Hereinafter, a DC power supply outlet according to a second embodiment of the present invention will be described with reference to the accompanying drawings.
Since the DC power supply outlet according to the second embodiment (hereinafter simply referred to as a power supply outlet) has the same configuration as the DC power supply outlet 100 according to the first embodiment, description of common contents is omitted.

  The DC power supply control device (hereinafter simply referred to as the power supply control device) included in the power supply outlet according to the second embodiment executes the voltage control process of FIG. 5 as in the first embodiment. This is different from the first embodiment in that a voltage value selection process as shown in FIG.

  Here, two devices A and B are connected to the power outlet, and the device A operates in the operation mode represented by the number “4” as shown in FIG. A description will be given by taking as an example a case of operating in the operation mode represented by the number “1”.

  When the execution of the voltage value selection process of FIG. 12 is started, the power supply control device reads the outlet side efficiency table of FIG. 10A from the ROM of the power supply control device, and the power supply outlet has the read outlet side efficiency table. Candidate voltage values “100”, “150”, “200”, “250”, and “300” that are candidates for voltage values to be designated for the DCDC converter are acquired. Next, the power supply control device determines that the power conversion efficiency of the entire power supply system (hereinafter referred to as total power conversion efficiency) has not been calculated for all of the acquired candidate voltage values (step S61; No). This is because the power supply control device has never executed the process of step S61.

  Next, the power supply control device uses the first candidate voltage value “100” volts, which is one of the candidate voltage values not yet used for calculating the total power efficiency, as a target voltage to be processed in steps S62 to S71. A value is set (step S62). Next, the power supply control device assigns a value “0” to the parameter for storing the power consumption consumed by the entire connected device (hereinafter referred to as the power consumption of the entire device) and clears it (step S63).

  Next, the power supply control device determines that power consumption is not calculated for all connected devices (step S64; No). This is because the power supply control device has never executed the process of step S64. Next, the power supply control device selects device A, which is one of the devices for which power consumption is not calculated, as a target device to be processed in steps S65 to S67 (step S65). Next, the power supply control device calculates the power consumption consumed by the target device when the target voltage value is applied to the target device, using the following equation (2) (step S66). This is because the average power is the power consumed by the target device when the rated voltage is applied to the target device.

Power consumption = Average power x Rated efficiency ÷ Target efficiency (2)
However, the symbol “×” represents a multiplication symbol, the symbol “÷” represents a division symbol, and the symbol “=” represents an equal sign.

  Since the target device A is in the operation mode represented by the mode number “4” and the target voltage is “100” volts, the power supply control device determines the average power and target efficiency used in the equation (2). Are identified as “1800” watts and “0.84”, respectively, from the device efficiency table of FIG.

  Here, the rated voltage of the target device is “200” volts as in the first embodiment, and the voltages 1 to 5 are similarly “100”, “150”, “200”, “250”, and “300”. Suppose that it is a bolt. Therefore, the power supply control device specifies the rated efficiency as “0.74” from the device efficiency table of FIG. For this reason, the power supply control device calculates the power consumption of the target device as “1585” watts using Equation (2).

  After executing step S66 of FIG. 12, the power supply control device adds the power consumption “1585” watt calculated in step S66 to the parameter for storing the power consumption of the entire device (step S67).

  Thereafter, the power supply control device calculates the power consumption of the device B by executing steps S65 to S67 again. Since the device B is in the operation mode represented by the number “1”, the power supply control device determines that the average power “1” watt, the rated efficiency “0.56”, and the target efficiency “0.80” and the above equation (2). Using this, the power consumption “0.7” watts of the device B is calculated. Therefore, the power supply control device calculates the power consumption of the entire device as “1586” watts by adding the power consumption “1585” watts of the device A and the power consumption “0.7” watts of the device B.

  Next, the power supply control device determines that the power consumption has been calculated for all the connected devices (step S64; Yes), and sets the calculated power consumption of the entire device as the load power of the power supply outlet (step S68).

  Next, the power supply control device complements (for example, using linear approximation) the contents of the outlet side efficiency table of FIG. 10A based on the load power “1586” watts and the target voltage value “100” volts. Thus, the power conversion efficiency “0.73” of the power supply outlet is acquired (step S69). Thereafter, the power supply control device uses the following equations (3) and (4). The voltage conversion efficiency of the entire connected device is calculated (step S70). This is because the target power of each connected device is weighted by the rated power using the rated power of the connected device.

但し、記号「N」は接続機器の総数を表し、記号「Σ」は集和記号を表し、記号「×」は乗算記号を表す。

However, the symbol “N” represents the total number of connected devices, the symbol “Σ” represents a summation symbol, and the symbol “×” represents a multiplication symbol.

但し、記号「N」は接続機器の総数を表し、記号「Σ」は集和記号を表す。

However, the symbol “N” represents the total number of connected devices, and the symbol “Σ” represents a summation symbol.

  Here, since the device A is in the mode represented by the number “4” and the device B is in the mode represented by the number “1”, the rated power of the device A is “1800” watts. The rated power is “1” watts. Therefore, the power ratio of the device A is “0.99”, and the power ratio of the device B is “0.01”. Further, since the target efficiency of the device A is “0.84” and the target efficiency of the device B is “0.80”, the voltage conversion efficiency of the entire device is “0.84”.

  Next, the power supply control device multiplies the power conversion efficiency “0.73” of the power supply outlet acquired in step S69 by the voltage conversion efficiency “0.84” of the entire device calculated in step S70, thereby obtaining the entire power supply system. Power conversion efficiency (that is, total power conversion efficiency) “0.61” is calculated (step S71).

  Next, the power supply control device determines that the total power conversion efficiency has not been calculated for all of the candidate voltage values (step S61; No). This is because only the first current value for the first candidate voltage value is calculated. Thereafter, the power supply control device calculates the total power conversion efficiency when the fifth candidate voltage value is set as the target voltage from the second candidate voltage value by repeatedly executing the processing of steps S62 to S71 four times.

  Thereafter, the power supply control device determines that the total power conversion efficiency has been calculated for all the candidate voltage values (step S61; Yes). Next, the power supply control device selects a candidate voltage value used for calculating the largest total power conversion efficiency among the five total power conversion efficiencies respectively calculated using the calculated five candidate voltage values. (Step S72). Thereafter, the power supply control device ends the execution of the voltage value selection process.

  According to these configurations, the power supply control device calculates the power conversion efficiency of the entire power supply system based on the power conversion efficiency of the power supply connector and the power conversion efficiency of the connected device connected to the power supply connector. A voltage value that realizes the highest power conversion efficiency among the set power conversion efficiencies is designated as the output voltage value of the DCDC converter on the power feeding connector side. For this reason, for example, after the power supply control device calculates the value of the current supplied to the entire power supply system (that is, the first current value), the voltage value that minimizes the calculated first current value is set to the power supply connector side. Compared with the case where the output voltage value of the DCDC converter is specified, the calculation amount is small.

  It should be noted that the present invention can be provided as a DC power supply control device for a DC power supply outlet provided with a configuration for realizing the function according to the present invention in advance, and by applying a program, an existing DC power supply control device can be provided for power supply according to the present invention. It can also function as a DC power supply control device for an outlet. That is, a computer (such as a CPU) that controls an existing DC power supply outlet executes a DC power supply control program for realizing each functional configuration by the DC power supply control device 180 of the DC power supply outlet 100 illustrated in the above embodiment. By applying as possible, it can function as a DC power supply control device 180 which is an example of a DC power supply control device for a DC power supply outlet according to the present invention. The DC power supply control method for a DC power supply outlet according to the present invention can be implemented using the DC power supply outlet 100.

  Such a program distribution method is arbitrary. For example, the program can be distributed by being stored in a recording medium such as a memory card, a CD-ROM, or a DVD-ROM, or via a communication medium such as the Internet. .

  Various embodiments and modifications can be made to the present invention without departing from the broad spirit and scope of the present invention. Further, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is shown not by the embodiments but by the claims. Various modifications within the scope of the claims and within the scope of the equivalent invention are considered to be within the scope of the present invention.

1 DC power supply system 10 DC power supply source 100 DC power supply outlet
101, 102 DC power supply connector 111, 112, 121, 122, 131, 132 Female terminal 140 DCDC converter 151, 152 Semiconductor switch 161, 162, 261 Drive circuit 171, 172, 271 Reception circuit 180 DC power supply controller 181 Coupling detection Unit 182 information acquisition unit 183 power supply determination unit 184 transmission control unit 185 switch drive unit 186 mode change determination unit 187 information storage unit 188 current value calculation unit 189 voltage value designation unit 191, 192, 291, 292 coil 201, 202 for DC power supply Plugs 211, 221, 231 Male terminal 251 Rectifier element 281 Main body 283 Guide hole
285 Slide cover 287 Resin module 301, 302 Device 341, 342 DCDC converter 343 Solar cell 351 Rectifier 381 Controller

Claims (10)

A DC power supply outlet having a voltage conversion unit that converts a voltage supplied from a power supply source into a specified value voltage,
A female terminal to which the voltage converted by the voltage converter is applied;
Information receiving means for receiving a plurality of device side efficiency information representing the power conversion efficiency of a device having a DC power supply plug inserted into the female terminal from the DC power supply plug;
Information storage means for storing a plurality of outlet side efficiency information representing the power conversion efficiency of the DC power supply outlet,
Supply power supplied from the power supply source to the voltage converter based on the plurality of device side efficiency information received by the information receiving unit and the plurality of outlet side efficiency information stored in the information storage unit Voltage value designating means for designating a designated value to decrease the voltage conversion unit,
A DC power supply outlet characterized by this. The information receiving means further receives current value information representing a value of current supplied from the female terminal to the device,
Using the current value information and the plurality of device side efficiency information received by the information receiving unit, and the plurality of outlet side efficiency information stored in the information storage unit, the power is supplied from the power supply source to the device. A current value calculating means for calculating a plurality of current values;
The voltage value specifying means realizes power conversion efficiency represented by outlet-side efficiency information used for calculating a current value smaller than other current values among a plurality of current values calculated by the current value calculating means. Specify the specified value of the voltage converter,
The outlet for direct-current power feeding according to claim 1 characterized by things. The information storage means includes voltage value information representing a voltage value after voltage conversion by the voltage converter when the DC power supply outlet achieves power conversion efficiency represented by the outlet-side efficiency information, and the outlet Side efficiency information is stored in association with each other,
The information receiving means, when the device achieves power conversion efficiency represented by the device-side efficiency information, voltage value information representing a voltage value before voltage conversion by the device, and the device-side efficiency information Receive in correspondence,
The voltage value specifying means uses the outlet side efficiency information stored in the information storage means in association with the same voltage value information and the equipment side efficiency information received by the information receiving means, from the power supply source. Designating a specified value for reducing the power supplied to the voltage converter to the voltage converter;
The outlet for direct-current power feeding according to claim 2 characterized by things. The device converts the voltage applied via the female terminal into a voltage having a voltage value suitable for the operating state of the device,
The outlet side efficiency information and the voltage value information, when the device that converts the voltage of the voltage value represented by the voltage value information achieves the power conversion efficiency represented by the device side efficiency information, It is further associated with mode information representing the operation mode of the device,
The information receiving means further receives mode information representing an operation mode of the device having the DC power supply plug from the DC power supply plug,
The voltage value designating unit uses the device-side efficiency information associated with the mode information received by the information receiving unit and the outlet-side efficiency information, and the device in the operation mode represented by the mode information Designating a specified value for reducing the supply power supplied from the power supply source to the voltage conversion unit that supplies power to the voltage conversion unit,
The outlet for direct current power feeding according to claim 3 characterized by things. A mode change determining means for determining whether or not the mode information received by the information receiving means has changed;
When it is determined by the mode change determining means that the operation mode of the device has changed, the voltage value specifying means uses the device side efficiency information associated with the mode information representing the changed operation mode, Designating a specified value for reducing the supply power supplied from the power supply source to the voltage converter in the voltage converter;
The outlet for direct-current power feeding according to claim 4 characterized by things. The information receiving means is non-contact coupled to the DC power supply plug;
When the information receiving means is non-contact coupled to the DC power supply plug, the connection switch is driven so as to electrically connect the female terminal and the voltage conversion unit, and the non-contact coupling is released. Switch drive means for stopping the drive of the connection switch so as to electrically disconnect the female terminal and the voltage conversion unit,
The outlet for DC power supply according to any one of claims 1 to 5, wherein The information receiving means further receives performance information representing voltage conversion performance by the device having the DC power supply plug from the DC power supply plug,
Based on the performance information received by the information receiving means, further comprising a power supply determining means for determining whether to supply power to the device,
The switch driving means drives the connection switch so as to electrically connect the female terminal and the voltage conversion unit when the power supply determining means determines that power is supplied to the device, and supplies power to the device. When it is determined not to stop driving the connection switch so as to electrically disconnect the female terminal and the voltage conversion unit,
The outlet for direct current power supply according to any one of claims 1 to 6, wherein A DC power supply control device for a DC power supply outlet having a voltage conversion unit that converts a voltage supplied from a power supply source into a voltage of a specified value,
Information acquisition means for acquiring a plurality of device-side efficiency information representing the power conversion efficiency of a device having a DC power supply plug inserted into the female terminal;
Information storage means for storing a plurality of outlet side efficiency information representing the power conversion efficiency of the DC power supply outlet,
Supply power supplied from the power supply source to the voltage converter based on the plurality of device side efficiency information received by the information acquisition unit and the plurality of outlet side efficiency information stored in the information storage unit Voltage value designating means for designating a designated value to decrease the voltage conversion unit,
A DC power supply control device for a DC power supply outlet. A DC power supply control program for a DC power supply outlet having a voltage converter that converts a voltage supplied from a power supply source into a voltage of a specified value,
Computer
Information acquisition means for acquiring a plurality of device-side efficiency information representing the power conversion efficiency of a device having a DC power supply plug inserted into the female terminal;
Information storage means for storing a plurality of outlet side efficiency information representing the power conversion efficiency of the DC power supply outlet,
Supply power supplied from the power supply source to the voltage converter based on the plurality of device side efficiency information received by the information acquisition unit and the plurality of outlet side efficiency information stored in the information storage unit The specified value for decreasing the voltage is allowed to function as a voltage value specifying means for specifying to the voltage converter,
A DC power supply control program for a DC power supply outlet. A DC power supply control method for a DC power supply outlet having a voltage conversion unit that converts a voltage supplied from a power supply source into a voltage of a specified value,
An application step of applying a voltage converted by the voltage converter to a female terminal;
An information receiving step of receiving a plurality of device-side efficiency information representing the power conversion efficiency of a device having a DC power supply plug inserted into the female terminal from the DC power supply plug;
An information reading step of reading a plurality of outlet-side efficiency information from information storage means for storing a plurality of outlet-side efficiency information representing the power conversion efficiency of the DC power supply outlet;
Supply supplied from the power supply source to the voltage converter based on the plurality of device side efficiency information received in the information receiving step and the plurality of outlet side efficiency information read in the information reading step A voltage value designating step of designating a designated value for reducing power to the voltage conversion unit,
A DC power supply control method for a DC power supply outlet.

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