JP2015213388A - Uninterruptible power supply system and interface converter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an uninterruptible power supply system capable of outputting a seizure signal from a conversion board to an UPS at the time of power recovery of commercial power supply, while eliminating the need for an independent power supply for a conversion board, and to provide an interface converter.SOLUTION: A battery output section 30 connected with a battery 23 is provided in an UPS2. Furthermore, a power supply section 5 for supplying a DC power, obtained from the battery output section 30, to a conversion board 4 is provided on the conversion board 4.

Description

  The present invention relates to an uninterruptible power supply system in which an interface converter is interposed between an uninterruptible power supply and an information processing apparatus.

  Conventionally, an uninterruptible power supply (UPS) that is connected between a commercial power supply and an information processing device such as a workstation (hereinafter referred to as a “host device”) and supplies power to the host device without an uninterruptible power is used. (For example, see Patent Document 1 and Patent Document 2).

  UPS is a system that supplies power from a commercial power supply during normal times and supplies power from an inverter during a power failure (so-called “always commercial power supply method”), and a method that supplies power from an inverter during both normal and power failures. (So-called “constant inverter power supply method”). The UPS may have a different switch configuration and control method depending on the power supply method. Therefore, when the current UPS connected to the host device is replaced with a replacement UPS having a different power supply method by maintenance replacement, a conversion board for interface conversion may be required as follows.

  FIG. 4 is a configuration diagram in which the host device 3 and the current UPS 2a are connected. Here, the UPS 2a is a UPS of a commercial power supply system at all times. The first switch 25a is ON / OFF controlled by the signal input / output unit 29b. The second switch 26a is switch-controlled according to the power failure of the commercial power supply 1 detected by the UPS 2a.

  When the commercial power source 1 fails, first, the second switch 26 a is switched to the side connecting the inverter 24 and the AC output unit 27. Next, the host device 3 performs a shutdown process using the AC power supplied from the inverter 24. Thereafter, the first switch 25a is turned OFF, and the output of AC power from the AC output unit 27 is stopped. At this time, the second switch 26 a is switched again to the side connecting the AC input unit 21 and the AC output unit 27.

  When the commercial power source 1 recovers from the power failure (hereinafter referred to as “recovery”), the second switch 26 a connects the AC input unit 21 and the AC output unit 27. Therefore, AC power supplied from the commercial power source 1 is output from the AC output unit 27. As a result, the host device 3 is activated.

  As described above, the UPS 2a controlled by the first switch 25a and the second switch 26a shown in FIG. 4 automatically starts outputting AC power when the commercial power source 1 is restored.

  On the other hand, FIG. 5 is a configuration diagram in which the current product UPS 2a shown in FIG. 4 is replaced with an alternative product UPS2. Here, UPS2 is a UPS of a constant inverter feeding method. The first switch 25 is ON / OFF controlled by a start signal (ON signal) and a stop signal (OFF signal) input from the outside to the signal input / output unit 29. The second switch 26 is switch-controlled according to the failure of the UPS 2 detected by the UPS 2.

  When the commercial power supply 1 fails, first, the host device 3 performs a shutdown process. Next, the conversion board 4 outputs an OFF signal to the signal input / output unit 29. As a result, the first switch 25 is turned OFF, and the output of AC power from the AC output unit 27 is stopped. At this time, the first switch 25 maintains OFF in order to prevent overdischarge of the battery 23 during a power failure.

  When the commercial power supply 1 recovers, the conversion board 4 detects the power recovery. The conversion board 4 outputs an ON signal to the signal input / output unit 29. As a result, the first switch 25 is turned on, and the AC power output from the inverter 24 is output from the AC output unit 27. As a result, the host device 3 is activated.

  As described above, the UPS 2 controlled by the first switch 25 and the second switch 26 shown in FIG. 5 starts to output AC power by inputting an ON signal from the outside when the commercial power source 1 is restored. ing.

  As described above, the conversion board 4 connected between the host device 3 and the alternative UPS 2 shown in FIG. 5 needs to output an OFF signal when the commercial power supply 1 is interrupted and an ON signal when the power is restored. There is. Therefore, the power supply means needs to supply DC power to the conversion board 4 from the start of input of AC power to the AC input unit 21 until the output of AC power from the AC output unit 27 stops. There is.

Japanese Patent Application No. 2011-515818 Japanese Patent Application No. 2007-306396

  Referring to FIGS. 6 and 7, a power supply means (hereinafter “general”) configured using current general technology for supplying power to the conversion board 4 connected to the alternative UPS 2 shown in FIG. 5. Will be described. As shown in FIG. 6, an independent first power supply unit 5 a is provided between the AC output unit 27 of the UPS 2 and the conversion board 4. In addition, an independent second power supply unit 6 is provided between the commercial power supply 1 and the conversion board 4.

  As shown in FIG. 7, the first power supply unit 5 a includes an AC / DC conversion unit 51 a that converts the AC power output from the AC output unit 27 into DC power. As a result, the converted DC power is supplied to the conversion board 4. Similarly, the second power supply unit 6 has an AC / DC conversion unit 61 that converts AC power supplied from the commercial power supply 1 into DC power. As a result, the converted DC power is supplied to the conversion board 4.

  As shown in FIG. 8, when the commercial power source 1 fails at time T1, the supply of AC power to the AC input unit 21 is stopped, and the UPS 2 detects the power failure. Further, the supply of DC power from the second power supply unit 6 to the conversion board 4 is stopped. The host device 3 performs a shutdown process.

  When the shutdown process of the host device 3 is completed at time T2, the conversion board 4 outputs an OFF signal to the signal input / output unit 29 using the DC power supplied from the first power supply unit 5a. As a result, the first switch 25 is turned OFF, and the output of AC power from the AC output unit 27 is stopped. Further, the supply of DC power from the first power supply unit 5a to the conversion board 4 is stopped, and the power supply to the conversion board 4 is all stopped.

  When the commercial power source 1 recovers at time T3, supply of AC power to the AC input unit 21 is started. The UPS 2 detects the power recovery and performs activation processing. In addition, supply of DC power from the second power supply unit 6 to the conversion board 4 is started, and the conversion board 4 detects power recovery.

  When the startup process of the UPS 2 ends at time T4, the conversion board 4 outputs an ON signal to the signal input / output unit 29 using the DC power supplied from the second power supply unit 6. As a result, output of AC power from the AC output unit 27 is started, and the host device 3 is activated. In addition, supply of DC power from the first power supply unit 5a to the conversion board 4 is started.

  As described above, the conversion board 4 can output an OFF signal at the time of a power failure of the commercial power supply 1 using the DC power supplied from the first power supply unit 5a. Further, the DC power supplied from the second power supply unit 6 can be used to output an ON signal when the commercial power supply 1 is restored.

  However, a general power supply means requires two independent external power supplies (first power supply unit 5a and second power supply unit 6) and wiring for connecting the external power supplies. For this reason, there is a problem that it cannot be installed at a site where the installation space for the interface conversion device is limited or at a site where the number of outlets of the commercial power supply 1 is small. Further, there is a problem that the interface conversion device is expensive.

  The present invention has been made to solve the above-mentioned problems, and can output a start signal from the conversion board to the UPS when the commercial power is restored, and does not require an external power supply for the conversion board. An object of the present invention is to provide an uninterruptible power supply system and an interface conversion device that can be used.

  The uninterruptible power supply system of the present invention comprises an AC input unit for inputting power from the outside, an AC output unit for outputting power to the outside, a signal input / output unit, and a storage battery output unit directly connected to the storage battery. An uninterruptible power supply, an information processing device connected to the AC output unit, a conversion board (conversion substrate unit) connected between the signal input / output unit and the information processing device, and a storage battery provided on the conversion board And a power supply unit that supplies power obtained from the output unit to the conversion board.

  The interface conversion device according to the present invention further includes a power supply unit that is provided in the conversion board and supplies the DC power input from the outside to the conversion board. The conversion board receives an input of a mode switching signal from the outside. The activation signal is output to the outside in response to the start.

  According to the uninterruptible power supply system and the interface conversion device of the present invention, it is possible to output a start signal from the conversion board to the UPS when the commercial power is restored, and to eliminate the need for an external power supply for the conversion board.

It is a block diagram of the uninterruptible power supply system of Embodiment 1 of this invention. It is a block diagram of the power supply part of Embodiment 1 of this invention. Embodiment 1 of the present invention: state of commercial power supply at each time, AC power input of AC input unit, AC power output of AC output unit, communication signal output of signal input / output unit, DC power output of power supply unit, host device It is explanatory drawing which shows the driving | operation of and operation mode of a conversion board. It is the block diagram which connected the host apparatus and UPS of the present product. It is the block diagram which connected the host apparatus and UPS of the alternative. It is a block diagram of an uninterruptible power supply system using a general power supply means. It is a block diagram of a general power supply means. State of commercial power supply at each time when using a general power supply means, AC power input of AC input unit, AC power output of AC output unit, DC power output of first power supply unit, DC of second power supply unit It is explanatory drawing which shows an electric power output and driving | operation of a host apparatus.

Embodiment 1 FIG.
With reference to FIG. 1, an uninterruptible power supply apparatus, an information processing apparatus, and an interface conversion apparatus according to Embodiment 1 of the present invention will be described.
In the figure, 1 is a commercial power source. The commercial power source 1 supplies AC power (AC power) having an effective voltage value of 100 volts (V).

  An AC input unit (AC input unit) 21 is connected to the commercial power source 1. An AC / DC converter (AC / DC converter) 22 is connected to the output of the AC input unit 21. A storage battery (battery) 23 and a DC / AC converter (inverter) 24 are connected to the output of the AC / DC converter 22. An inverter 24 is connected to the output of the battery 23. A first switch 25 is connected to the output of the inverter 24. A second switch 26 is interposed between the output of the AC input unit 21, the first switch 25 and the AC output unit 27. A controller 28 is connected to the output of the AC / DC converter 22 and the output of the battery 23. A signal input / output unit 29 is connected to the control unit 28 and the first switch 25. A storage battery output unit (battery output unit) 30 is directly connected to the output of the battery 23. In this way, the UPS 2 of the constant inverter power supply method is configured.

  The first switch 25 is a switch that turns on / off the connection between the inverter 24 and the AC output unit 27. The first switch 25 is ON / OFF controlled by a start signal (ON signal) and a stop signal (OFF signal) input from the outside to the signal input / output unit 29.

  The second switch 26 is a switch for switching between connecting the AC input unit 21 and the AC output unit 27 or connecting the inverter 24 and the AC output unit 27. The second switch 26 is switch-controlled according to the failure of the UPS 2 detected by the UPS 2.

The signal input / output unit 29 outputs a unique control signal including a backup operation signal, a battery low voltage output signal, and an alarm output signal. The signal input / output unit 29 outputs a communication signal of a serial transmission method (serial transmission method) based on the RS232C (Recommended Standard 232 version C) standard.
In general, most commercially available UPS use RS232C standard communication signals for UPS setting and remote control. The alternative UPS 2 has a configuration using unique control signals, and these communication signals are unused signals.

Here, after the input of AC power to the AC input unit 21 is started and the UPS 2 is activated, the signal voltage continuously becomes a negative voltage until the output of the AC power from the AC output unit 27 is stopped. This communication signal is hereinafter referred to as “mode switching signal”.
In general, in UPS, a signal voltage of a transmission data (SD) signal among communication signals becomes a positive voltage for a maximum of about 1 millisecond (ms) at the time of data transmission of 9600 bits per second (bps). The time is continuously set to be a negative voltage of −4V to −15V. At least one communication signal including the transmission data (SD) signal can be used as a mode switching signal.

  An information processing device (host device) 3 such as a workstation is connected to the AC output unit 27. Between the host device 3 and the signal input / output unit 29, a conversion substrate unit (conversion board) 4 for interface conversion is connected. A power supply unit 5 is provided on the conversion board 4. The conversion board 4 and the power supply unit 5 constitute an interface conversion device.

  As shown in FIG. 2, the power supply unit 5 includes a direct current direct current conversion unit (DC / DC conversion unit) 51. An input terminal 52 of the DC / DC converter 51 is connected to the battery output unit 30 via a diode 53. An output terminal 54 of the DC / DC converter 51 is connected to the conversion board 4. A capacitive element (capacitor) 55 is provided between the input terminal 52 and the signal ground (SG). Similarly, a capacitive element (capacitor) 56 is provided between the output terminal 54 and the signal ground (SG). The power supply unit 5 configured in this way converts DC power obtained from the battery 23 via the battery output unit 30 into positive DC power of a constant voltage (+3 V to +5 V) and supplies the DC power to the conversion board 4. To do.

  The conversion board 4 outputs an ON signal and an OFF signal to the signal input / output unit 29. The operating voltage of the conversion board 4 is a positive voltage of, for example, + 3V to + 5V. Here, the conversion board 4 has a plurality of types of operation modes including a normal mode and a low power consumption mode that consumes less power than the normal mode. Further, when the signal voltage of the mode switching signal input from the signal input / output unit 29 is zero voltage (0 V), the operation mode is switched to the low power consumption mode. Further, when the signal voltage of the mode switching signal is a negative voltage or a positive voltage, the operation mode is switched to the normal mode.

The operation of the uninterruptible power supply system configured as described above will be described with reference to FIG. It is assumed that the battery 2 of the UPS 2 is charged in advance and continues to output DC power.
When the commercial power source 1 fails at time T1, the supply of AC power to the AC input unit 21 is stopped, and the UPS 2 detects the power failure. The host device 3 performs a shutdown process.

  When the shutdown process of the host device 3 is completed at time T <b> 2, the conversion board 4 outputs an OFF signal to the signal input / output unit 29 using the DC power continuously supplied from the power supply unit 5. As a result, the first switch 25 is turned OFF, and the output of AC power from the AC output unit 27 is stopped.

  At this time, the output of the mode switching signal from the signal input / output unit 29 is also stopped, and the signal voltage becomes zero voltage (0 V). In response to this, the conversion board 4 switches the operation mode from the normal mode to the low power consumption mode.

  When the commercial power source 1 recovers at time T3, supply of AC power to the AC input unit 21 is started. The UPS 2 detects the power recovery and performs activation processing.

  When the startup process of the UPS 2 is completed at time T4, the output of the mode switching signal from the signal input / output unit 29 is started, and the signal voltage becomes a negative voltage. As a result, the conversion board 4 detects power recovery and switches the operation mode from the low power consumption mode to the normal mode.

  At time T <b> 5, the conversion board 4 outputs an ON signal to the signal input / output unit 29 using the DC power continuously supplied from the power supply unit 5. As a result, AC output from the AC output unit 27 is started, and the host device 3 is activated.

As described above, in the uninterruptible power supply system according to the first embodiment, the battery output unit 30 directly connected to the battery 23 is provided in the UPS 2. Further, the power supply unit 5 is provided on the conversion board 4 and supplies DC power obtained from the battery output unit 30 to the conversion board 4.
As a result, an OFF signal can be output from the conversion board 4 to the UPS 2 when the commercial power supply 1 is interrupted, and an ON signal can be output from the conversion board 4 to the UPS 2 when power is restored. Further, by eliminating the need for an external power supply for the conversion board 4, it is possible to reduce the installation space and cost of the interface conversion device.
Furthermore, since the DC power output from the battery 23 is supplied to the conversion board 4 without going through the DC / AC conversion and AC / DC conversion processes, the power conversion efficiency is improved and the power loss is reduced. can do.

  The signal input / output unit 29 outputs a communication signal based on the IEEE (Institut of Electrical and Electronics Engineers) 802.3 standard, and the conversion board 4 converts the communication signal based on the IEEE 802.3 standard to a mode switching signal. It is good also as what is used as.

  Further, the signal input / output unit 29 may output a communication signal based on the universal serial bus (Universal Serial Bus, USB) standard, and the conversion board 4 may use a communication signal based on the USB standard as a mode switching signal. .

  Further, the signal input / output unit 29 may output a contact driving signal of a relay (relay), and the conversion board 4 may use the contact driving signal as a mode switching signal.

  In the present invention, any constituent element of the embodiment can be modified or any constituent element of the embodiment can be omitted within the scope of the invention.

1 Commercial power supply 2, 2a Uninterruptible power supply (UPS)
3 Information processing device (host device)
4 Conversion board (conversion board)
5 Power supply unit 5a First power supply unit 6 Second power supply unit 21 AC input unit (AC input unit)
22 AC / DC converter (AC / DC converter)
23 Battery
24 DC-AC converter (inverter)
25, 25a 1st switch 26, 26a 2nd switch 27 AC output part (AC output part)
28 Control unit 29, 29a Signal input / output unit 30 Storage battery output unit (battery output unit)
51 DC / DC converter (DC / DC converter)
52 Input terminal 53 Diode 54 Output terminal 55, 56 Capacitance element (capacitor)
51a AC / DC converter (AC / DC converter)
61 AC / DC converter (AC / DC converter)

Claims (5)

An uninterruptible power supply comprising an AC input unit for inputting power from the outside, an AC output unit for outputting power to the outside, a signal input / output unit, and a storage battery output unit directly connected to the storage battery,
An information processing apparatus connected to the AC output unit;
A conversion board connected between the signal input / output unit and the information processing device;
A power supply unit that is provided in the conversion board unit and supplies power obtained from the storage battery output unit to the conversion board unit;
An uninterruptible power supply system comprising:   The signal input / output unit is configured to output a constant voltage mode switching signal to the outside in accordance with input of power to the AC input unit and output of power from the AC output unit. The uninterruptible power supply system according to claim 1. The uninterruptible power supply is configured to start output of power from the AC output unit in response to a start signal input from the outside to the signal input / output unit,
The conversion board unit is configured to output the activation signal to the signal input / output unit in response to the start of input of the mode switching signal from the signal input / output unit. The uninterruptible power supply system according to 2.   The conversion board unit has a normal mode and a low power consumption mode that consumes less power than the normal mode, and enters the normal mode in response to the start of input of the mode switching signal from the signal input / output unit. 3. The uninterruptible power supply system according to claim 2, wherein the uninterruptible power supply system is configured to switch to the low power consumption mode in response to stop of input of the mode switching signal. A power supply unit that is provided in the conversion board unit and supplies DC power input from the outside to the conversion board unit;
The conversion board unit is configured to output an activation signal to the outside in response to the start of input of a mode switching signal from the outside.

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