JP2015053819A - Dc power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a DC power supply system which does not require a dedicated connection cable for each of a plurality of electrical apparatuses and does not require a communication line other than a connection cable.SOLUTION: A DC power supply system comprises: an electrical apparatus comprising a power information control circuit which stores power information required for operation of the electrical apparatus and controls communication of the information; and a power supply device comprising a power generation circuit and a reading circuit for reading out the power information. The power generation circuit performs control so as to be capable of outputting DC power fitting the power information.

Description

  The present invention relates to a DC power supply system that can efficiently supply power to a plurality of electrical devices that require DC power, such as electronic devices that operate in a DC circuit.

  Currently, the electric power used at homes and offices such as factories is supplied with alternating current that can be easily stepped up and down. However, there are more electrical devices that operate with DC circuits around us, and when using electrical devices that operate with these DC circuits, AC power for home use is converted into DC by a dedicated AC adapter for each electrical device. Power. Furthermore, even when an electronic device that operates with direct current includes a secondary battery, a dedicated AC adapter is required for each electronic device to charge the secondary battery. For example, when a user goes on a trip or the like, a plurality of dedicated AC adapters corresponding to each electronic device must be carried, which causes problems such as an increase in weight and a bulkiness.

  In order to solve this problem, for example, the power adapter disclosed in Japanese Patent Application Laid-Open No. 2002-374675 is an invention made to gather together one power adapter that is necessary for each of a plurality of electronic devices. is there. In other words, the power cord main unit of the power adapter is separated from the output cord, and the output cord can be exchanged. Each output cord is available in several shapes suitable for the plug for each electronic device used. Owns a voltage setting circuit or voltage setting information for outputting a power supply voltage suitable for the electronic equipment. As a result, if an appropriate output cord is connected to the power supply unit each time it is connected to the electronic device to be used, the power supply voltage suitable for the electronic device is automatically output. It can be applied to various electronic devices.

In addition, JP 2010-258549 A relates to a technology for automatically controlling, managing, and monitoring a power supply device topology in a floor or server room in which a plurality of power supply devices, servers, and PCs are connected. In a power supply connection configuration in which electronic devices such as PDUs (hereinafter simply referred to as distributors), switching hubs, servers, and the like are connected in a tree shape (tree structure) via power cables, the power lines connected to the respective electronic devices are connected. A power management program, a power management system, and a power management method for creating a power source configuration topology by communicating with a common protocol using the power line communication and automatically managing the power have been proposed.
JP 2002-374675 A JP 2010-258549 A

  However, in the power adapter disclosed in Japanese Patent Laid-Open No. 2002-374675 described above, as a means for bringing together the power adapters, first, the power supply unit of the power adapter and the output for supplying the output power from the power supply unit to the outside Separate the code and make the output code interchangeable. It is necessary to prepare a dedicated output cord for each electronic device to be used. Furthermore, since this power adapter only supports driving of one electronic device, if it is desired to use a plurality of electronic devices at the same time, it is necessary to carry a plurality of power adapters.

  Also, the power management system disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 2010-258549 is a system comprising a plurality of devices connected by a power line communication network and a power management device connected by at least one of the devices via a network. A plurality of devices (devices A, B...) Connected by a power line form a power line communication network, and at least one device (device A in this example) in the power line communication network via the LAN. One power management device is connected.

  Each device transmits / receives a packet to / from another device at a certain cycle by power line communication of the power line, and transmits / receives a packet to / from the other device by a control unit that performs control such as storing data of the packet in a memory. It consists of a part.

  In addition, the power management apparatus issues a command for acquiring information in the power line communication network to a device connected via the LAN, and transmits / receives an issue command, a control unit that controls transmission / reception of the command to / from the device. A transmission / reception unit and a memory for storing the acquired device connection information are provided.

  As described above, the power management system uses a power line communication, but requires a LAN to transmit / receive commands to / from devices. Furthermore, even in various operation modes such as a server and a switching hub, the power that can be supplied by the power management system is always fixed, and thus energy is not necessarily saved.

  As described above, in a power supply system that supplies power to a plurality of electrical devices, a dedicated connection cable corresponding to the electrical device is required, and a LAN line is required in addition to the power line.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a DC power supply system that does not require dedicated connection cables for a plurality of electrical devices and does not require a communication line other than the connection cables.

A DC power supply system according to the present invention includes a power information control circuit that stores power information necessary for its operation in an electrical device and controls communication of the information,
The power supply device includes a power generation circuit and a circuit for reading the power information,
The power generation circuit is controlled to output a DC power suitable for the power information.

That is, the DC power supply system according to the present invention is
Electrical equipment that operates on DC power;
A power supply;
A connection cable for connecting the electrical device and the power supply device;
In a DC power supply system comprising:
The electrical device includes a power information control circuit that stores power information necessary for operation of the electrical device and controls communication of the information,
The power supply device includes a power generation circuit that controls a voltage and a current of DC power to be supplied, and a reading circuit that can communicate with the power information control circuit and reads the power information.
The power information control circuit and the reading circuit can be connected for communication by the connection cable,
The power generation circuit controls the power information stored in the power information control circuit to be read by the reading circuit so that DC power suitable for the information can be output, and connected from the power supply device. Electric power is supplied to the electric device through a cable.

  With such a configuration, in the DC power supply system of the present invention, even if the electric equipment that can be connected to the power supply device requires different electric power, the electric equipment includes a power information control circuit that stores power information. Since the power information is read and controlled so as to be able to output DC power suitable for it, the power required by the electric device can be supplied even if different electric devices are connected to the power supply device.

  Furthermore, when a plurality of electrical devices are connected to the above-described power supply device, the power supply device reads out power information required by each electrical device and can efficiently supply power based on each power information. It is good to be comprised so that it may control.

That is, the DC power supply system includes a plurality of power generation circuits and output ports,
In a state where a plurality of electrical devices are connected, from the information on the respective voltages and currents required by the plurality of electrical devices, the power generation path of the power generation path is based on the highest efficiency point of the plurality of power generation circuits. It is preferable to have an arithmetic processing circuit that determines a combination.

According to such a configuration, it is possible to efficiently supply necessary electric power to all electric devices connected to the DC power supply system.
For example, when a plurality of electrical devices are connected to the power supply device described above and the voltage ranges in which the electrical devices can operate overlap, a common voltage that enables the operation of the plurality of electrical devices by one power supply device Therefore, the power efficiency can be improved as compared with the case where a plurality of power supply devices are operated for each of a plurality of electric devices.

  Furthermore, the power supplied from the power supply system is not always constant, and may be configured to supply appropriate power according to various operation modes of the electrical equipment.

That is, the electrical device can operate in a plurality of operation modes with different power requirements,
The power information control circuit is configured to be able to set power information for each mode required in the plurality of operation modes in an internal memory,
When the operation mode of the electrical device changes, it may have a function of controlling the power information for each mode necessary for the operation mode to communicate with the power supply device and read by the reading circuit.

  Examples of the plurality of operation modes having different power requirements include power off, suspend, standby, energy saving operation, boot operation, and the like. Note that these modes may have different names depending on the electrical equipment.

  That is, when the electrical device is in a power-off, suspend, or standby state, it is desirable to operate at a low voltage in order to keep standby power low, and the power supply device supplies power corresponding thereto. On the other hand, when the electric device is started or booted, a large amount of electric power is required, and the power supply device supplies electric power accordingly. Therefore, the power supply device may be configured to be able to supply electric power according to such various operation modes of the electric device in a flexible manner.

  That is, in the DC power supply system, the power supply device and the power information control circuit of each electrical device are controlled so that when the operation mode of each electrical device changes, the power information for each mode required in the operation mode can be communicated. The power supply device may be configured to be able to supply power having the voltage value and current value required in the operation mode to the electric device based on the power information.

In addition, in the above-described DC power supply system, the power supply device may further include a failure diagnosis circuit.
In other words, the failure diagnosis circuit may have a function of diagnosing the state of the electrical device connected via the connection cable.

  The fault diagnosis circuit obtains information from the pre-operation diagnosis of the power supply circuit of the electrical equipment connected through the connection cable before conducting the electrical connection and performs fault diagnosis. It is preferable to have a function of diagnosing the above in real time. As a result of the diagnosis, if it is determined that there is some abnormality in the electrical equipment, the power supply can be stopped immediately and the spread of damage can be prevented.

  With the configuration as described above, in the DC power supply system of the present invention, the electrical device has a power information control circuit that stores the power information required by the electrical device, and can output DC power suitable for the power information. Can be controlled.

  In addition, if the power supply device is provided with a failure diagnosis circuit having a function of diagnosing the state of the electrical device connected via the connection cable, the state of the electrical device may be diagnosed. It becomes possible.

In the DC power supply system of the present invention, a connection cable can be shared when a plurality of electrical devices are connected to the power supply device.
Furthermore, if a configuration that enables communication of power information with a connection cable is provided, a communication line other than the connection cable is not required.

It is a figure which shows the whole structure of the direct-current power supply system by this invention. It is a figure which shows the communication means performed between the electric equipment by this invention, a connection cable, and a power supply device. It is a figure which shows the structure when not having a communication means in the electric equipment by this invention. It is a figure which shows the structure in the case of implementing efficiency point control with respect to several electric equipment by this invention. It is a 1st flowchart explaining an example of operation | movement of a DC power supply system. It is a 2nd flowchart following a 1st flowchart. It is a 3rd flowchart following a 2nd flowchart. It is a 4th flowchart following a 3rd flowchart.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an overall configuration of a DC power supply device according to the present invention. The direct current power supply device includes a power supply device main body 30, a connection cable 20, and an electric device 10. The power supply device main body 30 converts electric power supplied from the outside into direct current power required by the electric device 10 and supplies electric power to the electric device 10 via the connection cable 20.

[Flow of power control]
One of the features of the DC power supply device according to the present invention is to communicate and transmit power information required by the electrical equipment connected to the power supply device from the electrical equipment side to the power supply device body side. It is to generate electric power required by an electric device based on information and to supply the electric device side correctly and efficiently.

  The power information (operating voltage range, maximum operating current, etc.) necessary for the operation of the electric device 10 is stored in the power information control circuit 12 built in the electric device, and the plug at the end of the connection cable 20 is stored. Is connected to the connection terminal of the electrical device or approaches, the power information control circuit 12 sends the power information stored therein to the connection cable 20 in response to a request to read the power information from the power supply device 30. To control the power to be transmitted to the power supply device 30.

  Next, the transmitted power information is read by the reading circuit 35 provided in the power supply device 30 and then transmitted to the controller 36.

  Then, the controller 36 converts the power information of the electrical device into control data that can be applied to a power generation circuit such as a DC-DC converter, and controls the power generation circuit 32 with the control data. It is comprised so that the direct-current power which should be supplied to can be supplied.

  As described above, the DC power supply device 30 according to the present invention is characterized in that the power information to be supplied to the electrical device 10 is transmitted from the electrical device 10 to the power supply device 30 via the connection cable 20 and supplied by the power information. This is in the control of DC power. In other words, the power cable for supplying DC power from the power supply device to the electrical equipment and the signal line that reads the power supply information required by the electrical equipment and communicates to the power supply equipment are not separate, but also use the same power cable. ing.

  For example, the power transmission is DC, but the power information of the electrical device 10 is read at a high frequency (for example, 13.56 MHz RF) instead of DC, and the power transmission and the signal transmission are separated by different frequency bands. can do. Of course, apart from the power line, a signal line for transmitting the power information of the electrical device 10 may be provided. In this case, it is preferable because the signal transmitted through the signal line is not affected by the noise generated by the power supply circuit 11, but it is also a disadvantage that the number of cable cores increases.

  An advantage of reading power information at a high frequency is that information can be read without contact. That is, even if the connection cable 20 is not completely connected to the electrical device, the proximity communication using the coupling by the high frequency is performed only by bringing the plug on the electrical device 10 side of the connection cable 20 close to the receiving connector of the electrical device 10 ( Information can also be read by Near-Field Communication (NFC). This is the same technique used in RF-ID and the like. Therefore, before the connection cable 20 is electrically connected to the electrical device 10, it is possible to read the power supply information of the electrical device 10, and to determine whether or not to supply power to the electrical device and to diagnose the failure of the electrical device. You can do it right before connecting.

  For example, when an electrical device 10 that exceeds the power supply capability of the power supply device 30 is now being connected, it can be understood by simply bringing the plug of the connection cable 20 close to the power connector of the electrical device to be connected. Therefore, before connecting the cable, for example, the power supply device 30 emits an alarm sound, or the plug of the connection cable 20 emits, for example, red flashing light, so that a warning can be issued.

  Further, when the power information control circuit 12 storing the power information to be supplied by the electric device is not incorporated, the power information control circuit 12 storing the power information can be added later to the main body of the electric device. Therefore, the power information stored in the power information control circuit 12 is stored in a writable ROM (EP-ROM or the like), a flash memory, or the like, and a power supply circuit for driving the plug of the connection cable 20 and the electric device 10. 11 can be electrically connected, for example, in the form of a conversion plug 50 as shown in FIG. 3, for example, so that a power information control circuit having power information of the electrical equipment can be added later.

  The DC power supply device 30 configured as described above uses the power supplied from the external power source 40 such as a commercial power source such as a household power line or a secondary battery, and the power stored in the power information control circuit 12 of the electrical device 10. Conversion is performed based on the information, and electric power having a voltage and current suitable for the electric device 10 is supplied.

  In the DC power supply device 30 shown in FIG. 1, a case where an AC power source using a commercial power source and a DC power source using a secondary battery are used as the external power source 40 is shown. The commercial power supply may be, for example, a single-phase or two-phase AC100V, or a single-phase or three-phase AC200V. The secondary battery may be charged with electric power generated using renewable energy, such as a solar power generation device.

Further, details of the power information will be described.
In the power information control circuit 12 provided in the electric device, as power information concerning the electric device, an ID unique to each model having different power information, an operable voltage range, a rated current, a standby current of the electric device, an inrush In addition to the maximum current value such as current and the time stamp, it is preferable that the battery information and the like are stored as serial data (binary number) in the case of an electric device equipped with a status of the electric device and a battery.

  Such a power information control circuit is desirably built in the apparatus in advance by the manufacturer of the electrical equipment. For existing electrical equipment that does not have a built-in power information control circuit, connect the connection cable and the power connector of the electrical equipment in the form of a conversion plug or joint plug with a built-in power information control circuit as shown in FIG. It is good that a user attaches to an electric equipment main body with the form connected in an automatic manner.

  Not limited to this, a power information control circuit incorporating an RF-ID chip that records power information unique to an electrical device is attached near the power connector of the electrical device, and power information is contactlessly provided by high-frequency coupling with a connection cable. May be read and communicated to the power supply device side.

  In that case, a commercially available RF-ID reader / writer may be used for writing power information to be stored in the power information control circuit. Here, for example, a database (for example, as a homepage) that collects power supply information of all electrical devices is constructed on the Internet, and the model-specific ID is searched from the manufacturer and model number of the electrical device by accessing the database. Therefore, it is preferable that the power information can be set and the power information can be set, because accurate power information can be obtained without much trouble.

[Components of DC power supply]
Next, the components of the DC power supply main body 30 shown in FIG. 1 will be described in detail.
The power converter 31 is a converter that performs primary conversion on the power supplied from the external power source 40.
The power generation circuit 32 is a converter that secondarily converts the primary-converted power into a voltage range and a maximum current power to be supplied to the electrical device 10.
The monitoring circuit 33 measures the power output from the power generation circuit 32 and transmits information about the measured power to the controller 36.
The reading circuit 35 provided in the DC power supply device 30 is an electric device 10 such as a voltage or a current of DC power stored in the power information control circuit 12 incorporated in the electric device 10 transmitted via the connection cable 20. It is the electronic circuit for reading the information regarding the DC power which should be supplied to.
The output SW 34 is a switch that controls the output of DC power from the DC power supply device 30 to the connection cable 20.

  The DC power supply device 30 shown in FIG. 1 includes a plurality of power generation circuits 32, a monitoring circuit 33, an output SW 34, and a reading circuit 35 so as to cope with a case where a plurality of electrical devices 10 are connected. Also good.

  As described above, in the DC power supply device 30, the controller 36 first stores the power information to be supplied to the electrical device 10 via the power line of the connection cable 20, which is stored in the power information control circuit 12 provided in the electrical device 10. Then, it is transmitted to the reading circuit 35 of the power supply device body 30.

  In this way, the DC power supply device 30 acquires power information to be supplied to the electrical device 10. Further, the controller 36 calculates voltage information for controlling the output power from the read power information, that is, the voltage range and current value, and the voltage information is derived from the data table stored in the controller 36.

The controller 36 preferably has a function of constantly monitoring the power output from the DC power supply device 30, that is, the monitoring circuit 33, and the output voltage and output current are always compared with the power information required by the electrical equipment. It is preferable to have such a control program. By controlling in this way, appropriate electric power can always be supplied to the electric device 10, and the following trouble can be dealt with. That is, it is possible to prevent an accident by controlling the output even when power information is lost due to a short circuit or open circuit of an electric device or a communication abnormality.
In addition, for various operation modes of electrical equipment, for example, power-off, suspend, standby, boot-up, normal operation, energy saving operation or boot operation change, it is optimal for each operation mode Power control can be performed while saving unnecessary energy.

  Next, the configuration of the DC power supply device shown in FIG. 1 will be described more specifically. In FIG. 1, the case where one output port is provided is described as an example, but the number of output ports is not limited to this, and the required number of ports is provided depending on the form of use. Can do.

  The power converter 31 provided in the DC power supply main body 30 is a variable output regulator of the next stage, which will be described later, when the external power supply 40 supplied from the outside is a DC power supply by a solar power generation device or a secondary battery. This is a primary regulator that can adjust the voltage input to the power generation circuit 32 to be a voltage in the range of 24 VDC to 100 VDC as an example.

  Further, the power converter 31 converts the alternating current into a direct current when the external power supply 40 supplied from the outside is a commercial power supply 100 VAC to 240 VAC (50/60 Hz), and converts the converted direct current voltage to 24 VDC as an example. It is also a primary regulator that can be adjusted to a voltage in the range of ~ 100 VDC.

  The DC power supply main body 30 includes a power converter 31 so that the external power supply 40 supplied from the outside functions as either a DC power supply or an AC power supply. The DC power adjusted to a predetermined voltage by the regulator is connected to the power generation circuit 32 at the next stage. Note that the range of the DC voltage generated by the primary regulator may be higher than the range of the voltage defined for the electrical device.

  The power generation circuit 32 is a variable output regulator that converts the DC power generated by the primary regulator into a required voltage based on the power information of the electrical device 10 and outputs the voltage. The power generation circuit 32 is connected to the controller 36 and operates under switching control and output control.

  The output of the power generation circuit 32 is connected to each output port via the monitoring circuit 33 and the output SW 34. The connector portion of the connection cable 20 is connected to this output port.

  The monitoring circuit 33 measures the voltage value and current value generated by the power generation circuit 32 and is connected to the controller 36, and transmits information on the measured voltage value and current value. The controller 36 has a function of calculating the transmitted voltage value and current value.

  The output SW 34 is a circuit that controls whether or not DC power is supplied to the electrical device 10 via the connection cable 20. This output SW 34 is connected to the controller 36, and an on / off control signal as to whether or not to supply DC power determined by the controller 36 is transmitted as a digital signal or an analog signal.

  The reading circuit 35 has a function of reading and acquiring power information stored in the power information control circuit 12 built in the electric device 10 via the connection cable 20. The acquired power information is output as serial data to the connected controller 36. The reading circuit 35 is connected by direct electrical coupling circuit communication via an electrical connection terminal. The power information read from the power information control circuit 12 is a model unique ID of the electric device 10, a rated voltage range, a maximum current, a standby current, a time stamp, and the like.

  The controller 36 may have a function of associating the model-specific ID of the electrical device 10 transmitted from the reading circuit 35 with the acquired setting port number of the reading circuit.

  The controller 36 compares the rated voltage of the electric device 10 transmitted from the reading circuit 35 with the correlation data between the voltage and the DC-DC converter control data stored in the built-in flash memory, and generates a power generation circuit. A digital signal or an analog signal that matches the voltage required by the load device 10 is generated and transmitted to 32.

  Further, the controller 36 stores the rated current and standby current of the electric device 10 transmitted from the reading circuit 35 in a register, and performs an operation for comparison with the current information transmitted from the current / voltmeter. Further, the controller 36 integrates and records the clock count from the start of acquisition on the internal register based on the time stamp of the electric device 10 transmitted from the reading circuit 35. This represents the connection elapsed time of the load device and a function of detecting a case where the connection cable 20 is temporarily disconnected.

  In addition, after acquiring the power information stored in the power information control circuit 12, the controller 36 transmits switching control and output control signals to the connected power information control circuit 12, and these converter circuits generate the power information. The detected voltage and current are verified, and if a predetermined condition is satisfied, an output on / off control signal is transmitted to the output SW35.

The controller 36 may store a data table representing the correlation between the power information required by the electrical device 10 and the control data of the power generation circuit 32.

  In the DC power supply device shown in FIG. 1, the case where one electrical device is connected is described as an example, but a plurality of power supply ports of the power supply device may be provided to control a plurality of electrical devices.

  Further, a plurality of direct currents are provided in the power supply device 30 such that a direct current power supply circuit is provided for each power supply port of the power supply device 30 so as to be able to cope with the case where the power required by each of the plurality of connected electrical devices is different. A power supply circuit may be provided.

  Furthermore, a plurality of set DC power supply circuits do not have completely independent circuit configurations, but can be configured so that each circuit can exchange current, thereby reducing the total power consumption and contributing to improving the power efficiency.

  Specifically, when the required power ranges of a plurality of electric devices connected by the connection cable overlap, for example, the electric device (A) having a maximum operating current of 3 A that operates in a voltage range of 12 to 15 V. On the other hand, the electric device (B) to be newly connected operates at a voltage of 9 to 12 V, for example, at a maximum of 1 A while power is supplied by a DC power supply circuit having a power supply capability of 12 V and 5 A. Therefore, it is not necessary to operate the second DC power supply circuit for this purpose, and a part of the power of the first DC power supply circuit that supplies power is newly added. Can be used for connected electrical equipment. By doing so, it is possible to improve power efficiency and contribute to energy saving as compared to the case where two DC power supply circuits are individually operated with respect to two connected electric devices.

[Components of power information control circuit built in electrical equipment]
FIG. 2 is a diagram showing the configuration of means for performing communication in the power information control circuit.
When power required by the electric device 10 is supplied from the output SW 34 built in the power supply device 30 to the power supply circuit 11 for driving the electric device 10, a low frequency such as power on the + power line connecting them. A choke coil 38 and a choke coil 14 for allowing a (direct current) signal to pass through are arranged in series.

  Further, a positive power line via the connection cable 20 is connected via a coupling circuit 13 and a reading circuit 35 connected via a coupling capacitor 37 for communicating power information required by the electrical device 10 with a high frequency signal. Are connected to the power information control circuit 12 connected in this manner.

  That is, in order to perform power supply and communication through the same positive power line, a high-frequency signal, for example, a frequency such as 13.56 MHz is superimposed on the DC power supplied from the power supply device 30.

The superimposed high-frequency signal cannot pass through the choke coils 38 and 14, but can pass through the coupling capacitors 37 and 13, so that communication is possible between the reading circuit 35 and the power information control circuit 12 connected to each of them.
Furthermore, since the high-frequency signal can be communicated even in a non-contact manner at a very short distance, the communication can be performed only by bringing the electric device side plug of the connection cable 20 close to the power connector of the electric device. By so-called proximity communication, it is also possible to read power supply information of an electric device or perform failure diagnosis before inserting a power plug.

  The reading circuit 35 and the power information control circuit 12 include a transmission circuit Tx (Transmitter) and a reception circuit Rx (Receiver) so that bidirectional communication is possible. Information, a failure and an abnormal operation of the power supply device 30 can be communicated with each other via the connection cable 20.

  For communication signals and DC power supplied from the power supply device 30 and the electric device 10, only the low frequency is utilized by utilizing the property that the coupling capacitor 34 and the coupling capacitor 13 do not pass a low frequency signal such as a DC voltage. By being supplied to the power supply circuit 11 for driving the electric device 10 through the choke coil 38 and the choke coil 14 that do not pass high-frequency signals, the superimposed communication signal and supplied power do not interfere with each other. Thus, the choke coil and the capacitor are set optimally.

  Note that serial data used for communication has an error correction code or reception in order to distinguish whether data is lost due to the influence of external noise or the like, or whether the signals are generated by the power supply device 30 side and the electric device 10 side. It is preferable to improve the determinism and stability of communication by adding an echo back function of data.

  The power information control circuit 12 that controls communication is configured to periodically emit an echo signal from the reading circuit 35 of the power supply device 30 before the power supply from the power supply device 30 side is performed, that is, immediately after the connection cable 20 is connected. Then, the power information control circuit 12 starts up using an echo signal like a general ID tag, and establishes communication by echoing back the power information necessary for the electric device 10 to connect to the power supply device. It is possible to determine whether or not has been successfully performed.

  Further, if the power information control circuit 12 can always obtain status information indicating the operating state of the electrical device from the electrical device 10, for example, in addition to the normal operating state, the suspended state, the standby state, the boot-up state , The energy saving operation state, the boot operation state, and the electric power required by the electric device in each operation state, such as a failure of the electric device, is transmitted to the power supply device 30, and the supplied DC power is the state of the electric device. Accordingly, it is possible to instruct optimal control from time to time.

[Constituent elements when using a conversion plug]
FIG. 3 is a diagram illustrating a configuration using a conversion plug when the electrical device does not have a power information control circuit.
By connecting the conversion plug 50 having a built-in communication function between the connection cable 20 and the electrical device 10 when the electrical device does not have the power information control circuit 12 for communicating the power information required by the electrical device 10. The power information required by the electrical device 10 can be transmitted to the electrical equipment value 30 via the connection cable 20.

  As a configuration, the power information is stored in the conversion plug 50 in the shape of a coupling plug or a joint, and the power information control circuit 12 for bidirectionally communicating the information with the power supply device 30 and the high-frequency signal are passed. A coupling capacitor 13, a choke coil 14 that passes only DC power, a power line and its connection terminal, and a ground (GND) line and its connection terminal.

  This conversion plug 50 has plugs that can electrically connect the connection cable 20 and the electric device 10 at both terminals, and can be attached and detached at appropriate times.

  In addition, since the connection cable 20 and the electrical device 10 to be connected are determined as the terminals of the conversion plug 50, the connection cable 20 side connector is a female (socket) shape, and the electrical device 10 side is a male (plug). ) By adopting a shape, the device has been devised to prevent erroneous insertion.

  Moreover, the operability at the time of an electric equipment connection improves by putting the mark or mark of the arrow which shows the direction through which electric power flows into the conversion plug 50 exterior part so that the direction which a user inserts may not be mistaken.

[Elements constituting maximum efficiency point operation when multiple electrical devices are connected]
FIG. 4 is a configuration diagram illustrating a control operation in which each output circuit operates with high efficiency when a plurality of electrical devices are connected and DC power is supplied.
The configuration of the power supply device 30 will be described as a configuration in which two systems of electrical devices can be connected as an example in addition to the configuration shown in FIG.

The power generation circuits 32 a and 32 b of each output circuit are configured such that the output can be short-circuited by an RLY (relay) 39.
The RLY 39 serves as an open / close switch, and can short-circuit the output of an arbitrary power generation circuit by a control signal from the controller 36.

  As an example, when the electric device 10a and the electric device 10b are connected to three output circuits, respectively, the electric power required by the electric device 10a is 5 VDC / 1A, and the electric power required by the electric device 10b is 5 VDC / 7A. A case will be described in which each current supply capability of the circuits 32a and 32b is 7A at the maximum and the maximum efficiency current is 4A.

  The controller 36 transmits a control signal to the power generation circuits 32a and 32b based on the power information transmitted from the reading circuits 35a and 35b of each output circuit, and simultaneously supplies appropriate electric power to the electric devices 10a and 10b. The electrical devices 10a and 10b that require voltage are detected, and the current consumption is acquired by the monitoring circuits 33a and 33b.

  Since the electric current consumption of the electric device 10a is 1A and the electric device 10b is 7A, the controller 36 outputs a signal for controlling the RLY 39 to increase the power efficiency of the output circuit, and outputs the power generation circuits 32a and 32b. Short circuit.

  Next, the controller 36 outputs control information that provides the highest efficiency current to each of the power generation circuits 32a and 32b, whereby the load current of the control power generation circuit 32a increases from 1A to 4A, and the power generation circuit 32b. The load current is reduced from 7 A to 4 A, and each load current is operated with a 4 A load at which the highest efficiency is obtained, so that the total power efficiency of the power supply device 30 is improved.

  In that state, when the operating state of the electric device 10a or 10b changes and the demand power decreases or increases, the controller 36 calculates the status information from each electric device and the information of the monitoring circuits 33a and 33b, The power generation circuit determines the amount of current that can achieve the maximum efficiency or a combination that provides a current amount close thereto, adjusts the control signal of the power generation circuits 32a and 32b, and in some cases, opens the RLY 39 to cause the power generation circuit 32a, By setting 32b to a single load operation, control is performed to maintain the total power efficiency of the power supply device 30 at a high level.

[Flow chart of DC power supply operation]
Next, a flowchart of the DC power supply operation in the DC power supply device shown in FIG. 1 will be described.
5A to 5D are flowcharts showing a connection procedure and an operation procedure. Here, a case where one electrical device is connected will be described as an example.

First, the operation is started according to the first flowchart shown in FIG. 5A.
When the external power source 40 is connected to the power supply device 30 (step S101), a handshake signal for requesting a response for establishing communication is sent from the output port at regular intervals from the reading circuit 35 built in the power supply device 30. Sent out.
This state is repeated until the electrical device 10 serving as a load is connected, and means a standby state as an operation mode of the power supply device 30.

  Next, when the connection cable 20 is connected to the output port of the power supply device 30 and the input port of the electric device 10 serving as a load (Yes in step S102), a handshake signal generated from the output port of the power supply device 30 is generated. Is sent to the electric device 10 via.

  At this time, if the connection cable 20 is not connected to either the power supply device 30 or the electrical device 10 (No in step S102), the power supply device 30 and its built-in circuit continue to be in a standby state. [END] in the figure means the standby state of the power supply device 30 or the transition to the standby state (hereinafter the same).

  The handshake signal is received by the power information control circuit 12, and the response is sent to the reading circuit 35 via the same path (Yes in step S103), and the controller 36 built in the power supply device 30 establishes communication. Judgment (not shown).

  At this time, if the reading circuit 35 cannot confirm the response signal to the handshake signal, or if the power information control circuit 12 cannot receive the handshake signal (No at Step S103), the power supply device 30 continues the standby state.

Next, a request signal is sent so that [power information] is sent from the reading circuit 35 to the power information control circuit 12 (step S104).
[Power information] refers to the operating state of the electric device 10 such as [rated voltage information] and [rated current information] indicating the normal operation mode of the electric device 10 and [standby current information] indicating the standby state or hibernation state of the device. It is information which shows.
Standby is an operation that saves the work state in a RAM or the like when the work is temporarily interrupted in a computer device or the like, and suppresses power consumption, such as power supply to the RAM to hold data. Used for.
The pause is a method of storing a work state in a hard disk or the like that can be held without power supply, and is an operation that provides a minimum power supply.

  The power information control circuit 12 returns a response signal to the request signal sent from the reading circuit 35 (Yes in step S105) and sends [power information] required by the electric device 10 to the reading circuit (step S105). S106). Next, the reading circuit 35 transmits the received [power information] to the controller 36 (step S107).

  At this time, if the reading circuit 35 cannot confirm the response signal to the request signal or if the power information control circuit 12 cannot receive the request signal (No at Step S105), the power supply device 30 shifts to a standby state.

  Moving to the flowchart shown in FIG. 5B, the controller 36 verifies the serial data format of the received [power information], and if it is normal (Yes in step S108), [rated voltage information] included in the acquired [power information]. Is stored in the internal register (step S109).

At this time, if there is an abnormality in the serial data format of the acquired [power information] (No at Step S108), an open signal, that is, an output off signal is sent to the output SW 34 of the flowchart shown in FIG. 5D (Step S140), Process 1] (step S141) is executed, and a transition is made to a standby state.
[Error handling 1] may indicate [Electrical device disconnection], [Communication error], [Connection cable error], etc. on the display of the power supply device 30 or beep or melody to inform the user of the error. Good.

  Next, the [rated voltage information] stored in the register is verified, and it is confirmed that it is within the voltage range assumed and stored in the power supply device 30 (Yes in step S110).

  At this time, if the obtained [rated voltage information] is not within the specified range (No in step S110), [error processing 1] (step S140) in the flowchart shown in FIG. 5D is executed, and an open signal is output to the output SW34. That is, an output off signal is sent, and a transition is made to a standby state.

  Next, [rated current information] and [standby current information] included in the received [power information] are stored in the internal register (step S111). [Rated current information] stored in the register is verified to confirm that it is within the current range assumed and stored in the power supply device 30 (Yes in step S112), and is set with the reading circuit 35 that has established communication. The power generation circuit channel NO. Is stored (step S113).

  If the acquired [rated current information] is not within the specified range (No in step S112), an open signal, that is, an output off signal is sent to the output SW 34 shown in FIG. 5D (step S140), and [error processing 1] in the flowchart is performed. (Step S141) is executed, and a transition is made to a standby state.

  Moving to the flowchart shown in FIG. 5C, the power generation circuit 32 is controlled to generate a voltage based on [rated voltage information] acquired in the register by communication (step S114). The generated voltage is measured by the monitoring circuit 33 and transmitted to the controller 36 (step S115).

  Next, the transmitted voltage is compared with the [rated voltage information] stored in the register (step S116), and if it is confirmed that the error is within a predetermined range (Yes in step S117), a signal is sent to the output SW34. The internal contact is switched from open to short, and the voltage is output to the connection cable (step S118).

At this time, if the voltage output from the power generation circuit 32 is not within a predetermined error with respect to the [rated voltage information] stored in the register (No in step S117), [error processing 2] (step S126) is executed. And shift to a standby state.
[Error processing 2] may indicate [Electrical device disconnection], [Power supply failure], [Electrical device failure], etc. on the display of the power supply device 30, or beep or melody to inform the user of the failure. Good.

  Next, the current is measured by the monitoring circuit 33 and transmitted to the controller 36 (step S119).

  Next, the transmitted current is compared with the [rated current information] stored in the register (step S120), and it is confirmed that the error is within a predetermined range (Yes in step S121).

  At this time, if the output current is not within a predetermined error with respect to [rated current information] stored in the register (No in step S121), [error processing 2] (step S126) is executed, and FIG. An open signal, that is, an output off signal is sent to the output SW 34 in the flowchart shown (step S140), [error processing 1] (step S141) is executed, and a transition is made to a standby state.

  Next, the output voltage is measured by the monitoring circuit 33 and transmitted to the controller 36 (step S122).

  The transmitted voltage is compared with the [rated voltage information] stored in the register (step S123), and it is confirmed that the error is within a predetermined range (Yes in step S124).

  At this time, when the voltage output from the power generation circuit 32 is not within a predetermined error with respect to the [rated voltage information] stored in the register (No in step S124), the controller 36 performs voltage correction on the power generation circuit 32. (Step S125), and the process returns to step 119 of the flowchart shown in FIG. 5C.

  Moving to the flowchart shown in FIG. 5D, the output current is measured by the monitoring circuit 33 and transmitted to the controller 36 (step S133).

  Next, the transmitted current is compared with [standby current information] stored in the register, and it is confirmed that the error is within a predetermined range (Yes in step S134). Next, the process proceeds to the flowchart shown in FIG. 5C, and the reading circuit 35 requests the power information control circuit 12 to transmit [power information] (step S128).

  If there is a communication response from the power information control circuit 12 of the electrical device 10 (Yes at step S129), the read [power information] is received by the reading circuit 35 (step S130).

  At this time, if there is no communication response from the power information control circuit 12 (No in step S129), an open signal, that is, an output off signal is sent to the output SW 34 in the flowchart shown in FIG. 5D (step S140), and [error processing 1] (step S141) is executed to shift to a standby state.

  Next, [power information] is transmitted from the reading circuit 35 to the controller 36 (step S131).

  Next, the controller 36 stores [rated current information] and [standby current information] included in the acquired [power information] in the internal register (step S132), and returns to step S119 of the flowchart shown in FIG. 5C.

  Returning to step S134, the monitoring circuit 33 measures and compares the current transmitted to the controller 36 with the [standby (SB) current information] stored in the register, and if the error is not within the predetermined range (step (No in S134), the reading circuit 35 sends a request for [status information] of the electrical device 10 to the power information control circuit 12 (step S135)

  When the power information control circuit 12 returns a response signal to the request signal sent from the reading circuit 35 (Yes in step S136), the reading circuit 35 reads [status information] (step S137) and transmits it to the controller 36 (step S137). Step S138).

  Next, the controller 36 confirms whether the state of the electric device 10 is a standby state or a hibernation state from [Status Information] representing the state of the electric device 10, and if so (Yes at Step S139), returns to Step S133.

  If it is confirmed from [Status Information] that the electrical device 10 is not in the standby state or hibernation state (No at Step S139), an open signal, that is, an output off signal is sent to the output SW 34 (Step S140), and [Error Processing 1] ( Step S141) is executed to shift to a standby state.

Here, it is preferable that the connection cable that connects the power supply device and the electric device is configured such that communication between the power supply device and the power information control circuit is performed using a power line of the connection cable.
Specifically, the connection cable may have the following configuration. In other words, against the electrostatic induction noise (electrostatic noise) flying from various noise sources in the air, the entire cable is protected by a net-like shielded wire, and against the electromagnetic induction noise (inductive noise) caused by changes in the flowing current. Then, it is good to improve the quality of a communication signal by making it the twisted pair wire which twisted two power lines.
Furthermore, if a structure is incorporated in which a coil (L) and a capacitor (C) for separating a communication AC signal superimposed on a DC voltage flowing in a power line into DC power and a communication signal are incorporated, a power supply device and an electric device The side interface circuit can be miniaturized.

  Moreover, it is not necessary to prepare a dedicated cable for the electric device to be connected, and the connection cable used in the present invention can be shared. However, it may be standardized as a plurality of common connection cables from the range of desired voltage and current and the classification of electrical equipment. For example, it is good to use the standardized connection cable of about three types, such as for low power, medium power, and high power, depending on the power level. Specifically, the conductor core diameter and insulator material matched to the supplied power (current), and the thickness of the cable conforming to standards such as JCS (Japan Electric Wire Manufacturers Association), for small power, medium power, large Divide into electric power and standardize.

  Communication between the power supply device and the power information control circuit may be performed using the power line and / or shield line of the connection cable.

  The power information control circuit may store the power information stored therein in advance when it is incorporated into the electrical device, or communicate various power information from a database of a server installed on the Internet or a network. It may be acquired by means and rewritable. Examples of communication means at this time include Ethernet (registered trademark), Bluetooth (registered trademark), Wi-Fi, and RF-ID.

  As described above, the electric device, the power supply device, and the connection cable incorporating the communication / control circuit according to the present invention can be connected to a plurality of electric devices having different direct-current power necessary for driving the voltage. DC power having a current and current can be supplied without mistake, and power control based on status information of electrical equipment is possible, which can be used industrially. Furthermore, the connection cable and the power supply device can be shared, which is useful.

DESCRIPTION OF SYMBOLS 10, 10a, 10b: Electric equipment 11, 11a, 11b: Power supply circuit 12, 12a, 12b: Power information control circuit 13: Coupling capacitor 14: Choke coil 20, 20a, 20b: Connection cable 30: Power supply device body 31: Power Converter 32, 32a, 32b: Power generation circuit 33, 33a, 33b: Monitoring circuit 34, 34a, 34b: Output SW
35, 35a, 35b: reading circuit 36: controller 37: coupling capacitor 38: choke coil 39: relay (RLY)
40: External power supply

Claims (5)

Electrical equipment that operates on DC power;
A power supply;
A connection cable for connecting the electrical device and the power supply device;
In a DC power supply system comprising:
The electrical device includes a power information control circuit that stores power information necessary for operation of the electrical device and controls communication of the information,
The power supply device includes a power generation circuit that controls a voltage and a current of DC power to be supplied, and a reading circuit that can communicate with the power information control circuit and reads the power information.
The power information control circuit and the reading circuit can be connected for communication by the connection cable,
The power generation circuit controls the power information stored in the power information control circuit to be read by the reading circuit so that DC power suitable for the information can be output, and connected from the power supply device. A DC power supply system that supplies power to the electric device via a cable. The DC power supply system according to claim 1,
The DC power supply system includes a plurality of power generation circuits and an output port,
In a state where the plurality of electric devices are connected, the power generation path is based on the highest efficiency point of the plurality of power generation circuits based on the information on the voltage and current required by the plurality of electric devices. DC power supply circuit having an arithmetic processing circuit for determining the combination of The DC power supply system according to claim 1,
The electrical equipment is operable in a plurality of operation modes with different power requirements;
The power information control circuit is configured to be able to set power information for each mode required in the plurality of operation modes in an internal memory,
A DC power supply system having a function of controlling, when the operation mode of the electrical device is changed, communication of power information for each mode required in the operation mode with the power supply apparatus and reading the read circuit. The DC power supply system according to claim 1,
The power supply device further includes a failure diagnosis circuit,
The fault diagnosis circuit is a direct current power supply system having a function of diagnosing the state of the electrical device connected via the connection cable. The DC power supply system according to claim 1,
A DC power supply system in which individual information unique to the electrical device is added to the power information of the electrical device.

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