JP2013215068A - Power supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power supply system capable of attaining automatic switching to a power supply from a storage battery without performing control for switching a power supply even when power failure occurs.SOLUTION: The power supply system 1 includes an AC-DC converter 2 that converts AC power to output DC power; a storage battery 32 that is charged by DC power output from the AC-DC converter 2,a secondary cell unit 3 that outputs either one of DC power output from the AC-DC converter 2 or DC power output from the secondary cell unit 3, and a DC power supply unit 4 that converts DC power output from the secondary cell unit 3 to supply DC power for turning on a lighting device 10.

Description

  The present invention relates to a power supply system that supplies power from a commercial power source during normal times and charges a storage battery, and automatically switches to power supplied from the storage battery during a power failure.

  2. Description of the Related Art Conventionally, a power supply device has been developed that charges a storage battery using a commercial power source at normal times and drives lighting and other devices with power from the storage battery during a power failure.

  For example, in the uninterruptible power supply built-in side table disclosed in Patent Document 1, a built-in storage battery is charged using commercial power during a non-power outage, and the DC / AC The interior lighting is turned on by AC power obtained through the inverter.

JP 2007-325475 A

 However, in the conventional side table with a built-in uninterruptible power supply described above, when a power failure occurs, it is necessary to perform control for switching the power source from the commercial power source to the storage battery by detecting the power failure by the interruption detection means. There was a problem that would increase.

 In addition, since the conventional uninterruptible power supply side table described above has an alternating current output, a DC / AC inverter for converting the output of the storage battery into an alternating current is required, which further increases the complexity and cost. End up. In addition, since a DC power source for connecting information devices such as a mobile phone is not provided, there is a problem that it is not possible to charge a mobile phone or the like that is particularly necessary at the time of a power failure.

 Therefore, the present invention has been proposed in view of the above-described situation, and a power supply system that can automatically switch to a power source from a storage battery without performing control to switch the power source even if a power failure occurs The purpose is to provide.

  In order to achieve the above object, a power supply system of the present invention includes power conversion means for converting AC power and outputting DC power, and a storage battery charged by the DC power output from the power conversion means. A secondary battery unit that outputs either DC power output from the power conversion means or DC power output from the storage battery; and DC power output from the secondary battery unit is converted to turn on the illumination. And a direct current power supply unit for supplying direct current power.

  In addition, the power supply system of the present invention further includes an operation mode changeover switch for switching a lighting battery operation mode by the secondary battery unit, and the DC power supply unit is adapted for the illumination according to the operation mode selected by the operation mode changeover switch. The operation is switched.

  Furthermore, the power supply system of the present invention further includes a sensor that detects a state of an area where the illumination is installed, and the illumination operation mode is turned on and off according to a detection result of the sensor. An operation mode for switching is included.

  The power supply system of the present invention is further characterized in that the DC power supply unit further includes connection means for charging the portable terminal.

  Furthermore, the power supply system according to the present invention further includes a lighting drive unit that the DC power supply unit compensates for a voltage drop due to wiring between the secondary battery unit and drives the lighting with constant power. Features.

  According to the present invention, since the secondary battery unit outputs either the DC power output from the power conversion means or the DC power output from the storage battery to turn on the illumination, the power It is possible to automatically switch to the power from the storage battery without performing control such as switching. Thereby, the configuration of the apparatus can be simplified and the cost can be reduced.

  In addition, according to the present invention, an operation mode changeover switch that switches the operation mode of the illumination is further provided, and the operation of the illumination is changed according to the operation mode selected by the operation mode changeover switch. The lighting operating conditions can be changed.

  Furthermore, according to the present invention, the operation mode further includes a sensor for detecting the state of the area where the illumination is installed, and the operation mode includes a mode for switching the illumination on and off according to the detection result of the sensor. The illumination can be automatically operated according to the detection result of the sensor.

  In addition, according to the present invention, since the connecting means for charging the mobile terminal is further provided, it is possible to charge a mobile phone or the like that is particularly necessary at the time of a power failure.

  Furthermore, according to the present invention, the illumination driving means for driving the illumination with constant power by compensating for the voltage drop due to the wiring between the secondary battery unit and the DC power supply unit is provided. Illumination can be maintained at a constant brightness, and variations in brightness can be eliminated.

It is a figure which shows the structure of the electric power supply system which concerns on one Embodiment of this invention. It is a wiring diagram which shows the structure of the wiring of the electric power supply system which concerns on one Embodiment of this invention. It is a figure which shows the structure of the logic circuit of the electric power supply system which concerns on one Embodiment of this invention. It is a figure for demonstrating an example of the operation mode set to the electric power supply system which concerns on one Embodiment of this invention.

  Hereinafter, an embodiment to which the present invention is applied will be described with reference to the drawings.

[Configuration of power supply system]
FIG. 1 is a block diagram showing a configuration of a power supply system according to the present embodiment. As shown in FIG. 1, the power supply system 1 according to this embodiment includes an AC / DC converter (power conversion means) 2 that converts AC power and outputs DC power, and outputs from the AC / DC converter 2. Secondary battery unit 3 having a storage battery that is charged by the direct-current power, and direct-current power supply unit 4 that converts the direct-current power output from the secondary battery unit 3 and supplies direct-current power for lighting the illumination 10 And.

  Here, the power supply system 1 according to the present embodiment is a system for supplying power to a general house. In normal times, the power supply system 1 supplies power from a commercial power source and charges a storage battery. The power is supplied by switching to the power from the storage battery.

  The AC / DC converter 2 is connected to a commercial AC power supply via the circuit breaker 12 of the distribution board 11, converts the input AC power, and outputs DC power.

  The secondary battery unit 3 includes a storage battery that is charged by DC power output from the AC / DC converter 2, and is either DC power output from the AC / DC converter 2 or DC power output from the storage battery. Is output. In addition, the secondary battery unit 3 includes an operation mode changeover switch 31 that switches the operation mode of the illumination 10, and the operation conditions of the illumination 10 during normal times and power outages are set in a plurality of operation modes, respectively. Since the secondary battery unit 3 is low voltage and safe, it may be installed or built in the position of the DC power supply unit 4 and installed in a place where the ceiling of the building can be inspected.

  The DC power supply unit 4 includes a constant current circuit (illumination driving means) 41 that compensates for a voltage drop due to the cable 50 between the secondary battery unit 3 and drives the illumination 10 with a constant current. The illumination 10 can be lit at a constant brightness even when the length is increased. In addition, the constant current circuit 41 can reduce the size of the cable 50 and reduce the illumination. Note that a constant voltage circuit may be installed instead of the constant current circuit 41, and costs can be reduced by collectively converting voltages necessary for the plurality of lights 10 by the constant voltage circuit.

  Further, the DC power supply unit 4 includes a switch circuit 42. The switch circuit 42 is an operation mode changeover switch 31, an illumination switch box 13 for switching on / off the illumination 10, and an area where the illumination 10 is installed. Are connected to a light / dark sensor 14 for detecting the light / dark of the light and a human sensor 15 for detecting a person existing in the area where the illumination 10 is installed. Then, according to the operation mode selected by the operation mode changeover switch 31, the switch circuit 42 turns on the illumination 10 based on ON / OFF of the illumination switch box 13 and detection signals from the light / dark sensor 14 and the human sensor 15. And turn off.

  Further, the DC power supply unit 4 includes a connection part (connection means) 16 for charging the mobile terminal, and the DC / DC converter 43 supplies DC power to the connection part 16. The DC / DC converter 43 converts the DC power output from the secondary battery unit 3 into DC power necessary for charging the mobile terminal and supplies the DC power. Moreover, the connection part 16 may be comprised with a normal DC outlet and USB, and may be comprised with the connection terminal which can be directly connected to the charge terminal of a mobile telephone.

[Wiring configuration of power supply system]
Next, the wiring configuration of the power supply system 1 according to the present embodiment will be described with reference to FIG. As shown in FIG. 2, the secondary battery unit 3 includes an operation mode changeover switch 31 that switches the operation mode of the illumination 10, a storage battery 32 that is charged by DC power output from the AC / DC converter 2, and a storage battery 32. A battery monitoring control circuit 33 that monitors and controls the state of charge of the battery, a battery protection diode 34 that protects the storage battery 32, a power protection diode 35 that protects the AC / DC converter 2, and a battery voltage that suppresses the charging voltage of the storage battery 32. A suppression resistor 36 is provided.

  In the secondary battery unit 3, the storage battery 32 is charged while outputting DC power from the AC / DC converter 2 in normal times, and automatically switches to DC power from the storage battery 32 and outputs when a power failure occurs. Thus, even if the secondary battery unit 3 is not equipped with a special power failure detection circuit, the power can be switched between the normal time and the power failure, and since it has a simple configuration, the power can be switched smoothly. . The operation mode changeover switch 31 is provided with contacts corresponding to a plurality of operation modes, and outputs an illumination control signal corresponding to the operation mode selected by the user. Further, since the storage battery 32 suppresses the charging voltage so as to avoid the full charge by the battery voltage suppression resistor 36, it can be used for a long time.

  Next, the illumination switch box 13 includes a switch 61 that switches between turning on and off the illumination 10, a display LED 62 that is turned on when the illumination 10 is turned off, and a current limiting resistor 63 that limits a current flowing through the display LED 62. . The user switches on / off the illumination 10 by turning on / off the switch 61 of the illumination switch box 13. The display LED 62 is lit so that the position of the switch 61 can be seen when the illumination 10 is turned off and dark.

  The switch circuit 42 includes an operation mode changeover switch 31, a light / dark sensor 14, a logic circuit 71 connected to the human sensor 15, a semiconductor switch 72 that is turned on / off according to an output signal of the logic circuit 71, and a logic circuit 71 And an inverting circuit 73 for inverting the output signal.

  Here, the configuration of the logic circuit 71 will be described with reference to FIG. As shown in FIG. 3, the logic circuit 71 is a logical product of the inversion circuit 81 that inverts the illumination control signal output from the operation mode changeover switch 31, and the detection signal of the light / dark sensor 14 and the detection signal of the human sensor 15. And a second AND circuit 83 that calculates the logical product of the output signal of the inverting circuit 81 and the output signal of the first AND circuit 82. As shown in FIG. 3, in the logic circuit 71, since the second AND circuit 83 calculates a logical product, only when the illumination control signal is at the low level, that is, when the output of the inverting circuit 81 is at the high level, The detection result of the human sensor 15 affects the output of the logic circuit 71. Note that the logic circuit 71 can be appropriately changed according to the lighting conditions set in the operation mode of the illumination 10.

  In the switch circuit 42, when the output of the logic circuit 71 is at a high level, the semiconductor switch 72 is turned on to turn on the illumination 10, and when the output of the logic circuit 71 is at a low level, the semiconductor switch 72 is turned off. The illumination 10 is turned off. At this time, since the inverting circuit 73 inverts the output of the logic circuit 71 and outputs it, the display LED 62 is turned on when the illumination 10 is turned off.

[Operation of power supply system]
Next, the operation of the power supply system 1 according to this embodiment will be described.

  First, during normal times, AC power from a commercial AC power source is converted into DC power by the AC / DC converter 2 and output to the secondary battery unit 3, which charges the storage battery 32 and performs AC / DC conversion. The DC power output from the device 2 is output to the DC power supply unit 4. On the other hand, when the AC power from the commercial AC power supply stops during a power failure, the secondary battery unit 3 outputs the DC power output from the storage battery 32 to the DC power supply unit 4.

  The DC power supply unit 4 to which the DC power from the AC / DC converter 2 or the storage battery 32 is supplied is illuminated 10 according to the operation mode selected by the ON / OFF of the illumination switch box 13 and the operation mode changeover switch 31. Controls turning on and off.

  Here, an example of each operation mode set in the operation mode changeover switch 31 will be described with reference to FIG. In FIG. 4, “◯” indicates that the illumination 10 is turned on, “x” indicates that the illumination 10 is turned off, and “sensor” indicates that the illumination 10 is turned on and off according to the detection result of the sensor.

  First, as shown in FIG. 4, in the A mode, the illumination 10 is turned on when the switch 61 is ON during both normal and power outages, and the illumination 10 is turned off when the switch 61 is OFF. As shown in the wiring diagram of FIG. 2, the terminal of the A mode of the operation mode changeover switch 31 is always at the high level, so that the illumination control signal output from the operation mode changeover switch 31 is always at the high level. Thus, a low level signal is always output from the inverting circuit 81 shown in FIG. 3, and the output of the logic circuit 71 is always at the low level regardless of the detection signal from the sensor. Therefore, the semiconductor switch 72 is always OFF, and the illumination 10 can be switched on / off only by turning on / off the switch 61.

  Next, in the B mode, the illumination 10 is turned on and off in accordance with the ON / OFF state of the switch 61 in the normal state. However, in the event of a power failure, the switch 61 is turned on and the illumination 10 is turned on. The illumination 10 is turned on and off according to the signal. As shown in the wiring diagram of FIG. 2, the terminal of the B mode of the operation mode changeover switch 31 is normally at a high level and becomes a low level at the time of a power failure, so the illumination control signal output from the operation mode changeover switch 31 is normally Sometimes high level, low level during power failure. Accordingly, the output of the logic circuit 71 shown in FIG. 3 is always at the low level regardless of the detection signal from the sensor at the normal time, and the high level and the low level are switched according to the detection signal from the sensor at the time of a power failure. Therefore, in normal times, the illumination 10 is switched on / off only by turning the switch 61 ON / OFF. However, in the event of a power failure, the illumination 10 is lit when the switch 61 is ON, and when the switch 61 is OFF, the detection signal of the sensor is used. Accordingly, the illumination 10 is turned on or off.

  Further, in the C mode, the illumination 10 is turned on when the switch 61 is ON during both a normal time and a power failure, and when turned off, the illumination 10 is turned on and off according to the detection signal of the sensor. As shown in the wiring diagram of FIG. 2, since the C mode terminal of the operation mode changeover switch 31 is always at the low level, the illumination control signal output from the operation mode changeover switch 31 is always at the low level. Thereby, a high level signal is always output from the inverting circuit 81 shown in FIG. 3, and the output of the logic circuit 71 becomes a high level or a low level according to the detection signal from the sensor. Therefore, the illumination 10 is turned on when the switch 61 is ON, and is turned on or off according to the detection signal of the sensor when the switch 61 is OFF.

  Thus, in the power supply system 1 according to the present embodiment, the illumination 10 is turned on or off according to the operation mode selected by the operation mode changeover switch 31.

  As described above in detail, according to the power supply system of the present embodiment, either DC power output from the AC / DC converter 2 or DC power output from the storage battery 32 is output. Since the illumination 10 is turned on, it is possible to automatically switch to the power from the storage battery 32 without performing control to switch the power supply even if a power failure occurs. Thereby, the configuration of the apparatus can be simplified and the cost can be reduced.

  Moreover, according to the electric power supply system which concerns on this embodiment, since the operation mode change-over switch 31 which switches the operation mode of the illumination 10 is provided, and operation | movement of the illumination 10 is switched according to the operation mode selected by the operation mode change-over switch 31. The user can easily change the operating conditions of the lighting as needed.

  Furthermore, according to the electric power supply system which concerns on this embodiment, it is equipped with the sensors 14 and 15 which detect the state of the area | region in which the illumination 10 is installed, and the mode which switches on / off of the illumination 10 according to the detection result of a sensor Is included in the operation mode, the illumination 10 can be automatically operated according to the detection result of the sensor.

  In addition, according to the power supply system according to the present embodiment, since the connection unit 16 for charging the mobile terminal is further provided, it is possible to charge a mobile phone or the like that is particularly necessary at the time of a power failure.

  Furthermore, according to the power supply system according to the present embodiment, the constant current circuit 41 that compensates for the voltage drop caused by the cable 50 between the secondary battery unit 3 and the DC power supply unit 4 and drives the illumination 10 with constant power. Thus, even if the cable 50 is long, the illumination 10 can be kept at a constant brightness, and variations in brightness can be eliminated.

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and even if it is a form other than this embodiment, as long as it does not depart from the technical idea according to the present invention, the design and the like Of course, various modifications are possible.

  According to the power supply system of the present invention, it is possible to automatically switch to the power from the storage battery without performing control that switches the power supply even if a power failure occurs, thereby simplifying the configuration of the device. Costs can be reduced. Therefore, the power supply system according to the present invention can be used industrially.

DESCRIPTION OF SYMBOLS 1 Power supply system 2 AC / DC converter 3 Secondary battery unit 4 DC power supply unit 10 Illumination 11 Distribution board 12 Circuit breaker 13 Illumination switch box 14 Light / dark sensor 15 Human sensor 16 Connection part 31 Operation mode switch 32 Storage battery 33 Battery monitoring control circuit 34 Battery protection diode 35 Power supply protection diode 36 Battery voltage suppression resistor 41 Constant current circuit 42 Switch circuit 43 DC / DC converter 50 Cable

Claims (5)

Power conversion means for converting AC power and outputting DC power;
A secondary battery unit comprising a storage battery charged with DC power output from the power conversion means, and outputs either DC power output from the power conversion means or DC power output from the storage battery;
A power supply system comprising: a DC power supply unit that converts DC power output from the secondary battery unit and supplies DC power for lighting the lighting. The secondary battery unit further includes an operation mode switching switch for switching an operation mode of the illumination,
The power supply system according to claim 1, wherein the DC power supply unit switches the operation of the illumination according to an operation mode selected by the operation mode changeover switch. A sensor for detecting a state of an area where the illumination is installed;
The power supply system according to claim 2, wherein the operation mode of the illumination includes an operation mode in which the illumination is switched on and off according to a detection result of the sensor.   The power supply system according to any one of claims 1 to 3, wherein the DC power supply unit further includes connection means for charging the mobile terminal.   5. The DC power supply unit according to claim 1, further comprising illumination driving means for driving the illumination with constant power by compensating for a voltage drop due to wiring between the DC battery unit and the secondary battery unit. The power supply system according to any one of claims.

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