JPH1084677A - Uninterruptible power supply provided with multifunction output - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize an uninterruptible power supply(UPS) always supplying power from the commercial power supply system which can concurrently supply an output on/off controllable by an external signal and an output normally carrying a current. SOLUTION: A device is constituted by an AC/DC converter 1, a DC/AC inverter 2, a battery 3, a bypass circuit 4, a first switch 5 provided in an output circuit of the DC/AC inverter 2, a second switch 6 provided in the bypass circuit 4, a third switch 7 provided between a parallel connection point of the first/ second switches and a first AC output terminal 9 and a second AC output terminal 10 directly connected to the parallel connection point, so that the third switch 7 can be on/off controlled by an on/off signal from the outside through a pin 8 of DSUB 15.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an uninterruptible power supply (hereinafter referred to as UPS) of an always commercial power supply system, and more particularly to an uninterruptible power supply having an always-on power output and an output which can be controlled by an external on / off signal. Regarding UPS.

[0002]

2. Description of the Related Art An example of a conventional UPS is shown in FIG. In FIG. 2, a commercial AC power supply 110 is an AC / DC
The DC power is input to the converter 101 and converted into DC power.
After being converted into AC power in the / AC inverter 102, it is output from AC output terminals 108 and 109 via a switch 106. Further, a bypass circuit 104 is provided, and commercial AC power input through the bypass circuit 104 is supplied to an output terminal 108 through a switch 105.
And 109 are output. AC / DC converter 101
Between the DC and AC / DC inverter 102
03 is connected, and is normally floatingly charged by the AC / DC converter 101. When the commercial AC input is interrupted, the DC power from the battery 103 is AC-converted by the DC / AC inverter 102 and output from the output terminals 108 and 109.

[0003]

In normal times, D
The AC power output from the C / AC inverter 102 is stably supplied to a plurality of loads via the AC output terminals 108 and 109. The operation of the DC / AC inverter 102 is performed by controlling the control circuit 107 to turn on and off. I was going. Therefore, when the load supplied from the UPS includes a load to be controlled on / off, there is a disadvantage that the load desired to be always energized is controlled on / off together.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and is intended for a load which needs to be constantly energized and a load which needs to be turned on / off. , UPS with multi-function output that can respond flexibly
It is intended to provide.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below.
This will be described with reference to FIG. FIG. 1 shows the U
FIG. 2 is a block diagram illustrating a circuit configuration of a PS. In FIG. 1, a commercial AC input 20 is converted into DC power in an AC / DC converter 1 and converted into AC power in a DC / AC inverter 2. The battery 3 is connected in parallel with the DC / AC inverter 2 to the DC output circuit of the AC / DC converter 1 and is floatingly charged by the AC / DC converter 1 in normal times. Commercial AC input 20
If a power failure occurs, the DC power of the battery 3 becomes D
The power is converted into AC power by the C / AC inverter 2, and is output as a backup power via the first switch 5.

A first switch 5 provided in the output circuit of the DC / AC inverter 2 and a second switch 6 provided in the bypass circuit 4 are connected in parallel on the load side. The third switch 7 provided between the DSUB 15 and the first AC output terminal 9 has a function of being turned on / off by an on / off signal input to the DSUB 15 pin 8. Further, the second AC output terminal 10 is directly connected to the parallel connection point.

[0007] The server computer 12 and the modem 13
Since they are connected to the DSUB 15 pin 8 provided in the UPS 11 via RS232C standard serial data communication lines (hereinafter referred to as RS232C) 15 and 16, respectively, The switch can be turned on and off. Since the server computer 12 is supplied with required power from the first AC output terminal, the RS232C15
, The supply of the required power can be appropriately controlled on / off. Since the modem 13 has a function of inputting communication data from the outside, the R
The server computer 12 can also be turned on / off via S232C16. On the other hand, since the second AC output terminal 10 is directly connected to the first switch 5 and the second switch 6, it is possible to supply a constantly energized output which is not affected by an external ON / OFF signal. Accordingly, the modem 13 and the disk array 14 connected to the second AC output terminal 10 are always supplied with required power by being continuously energized from the UPS 11. DC power from the battery 3 can be supplied with backup power via the DC / AC inverter 2. That is, since the first AC output terminal and the second AC output terminal have different power supply functions, they can support a plurality of applications.

[0008]

As described above, in a UPS having a multi-function output according to the present invention, a single UPS controls a device for a plurality of uses, that is, a device that needs to be constantly energized, and controls power on / off. It is possible to flexibly cope with a system in which a desired device is present, and to maintain the same function at the time of a commercial AC input power failure.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a UPS according to the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional UPS.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 AC / DC converter 2 DC / AC inverter 3 Battery 4 Bypass circuit 5, 6, 7 Switch 8 DSUB15 pin 9, 10 AC output terminal

Continuation of the front page (72) Inventor Toshiharu Kurosaki 1-19-9 Tsutsudori, Sumida-ku, Tokyo Nippon Electric Seiki Co., Ltd.

Claims (2)

[Claims] An AC / DC converter for converting a commercial AC input into a DC signal.
A converter, a DC / AC inverter for converting the output of the AC / DC converter into an AC, a battery connected to a DC circuit between the AC / DC converter and the DC / AC inverter, and an AC output from the DC / AC inverter. A first switch for on / off control, a second switch for on / off control of a commercial AC input from a bypass circuit, and a third switch provided at a parallel connection point of the first switch and the second switch. An uninterruptible power supply comprising: a first AC output terminal connected via a switch; and a second AC output terminal directly connected to the parallel connection point, wherein an external power supply is provided to the third switch. A function controlled by an on / off signal is provided to output AC power based on an external on / off signal from a first AC output terminal,
An uninterruptible power supply device having a multi-function output, characterized in that a constant AC power is output from a second AC output terminal. 2. When a commercial AC input is interrupted, DC power from a built-in battery is converted to AC through a DC / AC inverter, and required AC power is output from first and second AC output terminals. The uninterruptible power supply device with a multi-function output according to claim 1, wherein the uninterruptible power supply device is provided.