JPH04150741A - Uniterruptible power supply - Google Patents

Abstract

PURPOSE:To make delay time conform to a time requested on the side of load unit by starting counting of a stored delay time upon receiving an inverter operation stop command on the load side, ensuring a time at which the load unit makes a transition to a power supply state, and interrupting power supply to the load upon completion of counting of delay time. CONSTITUTION:Upon power interruption, a power interruption detecting circuit (f) delivers a power interruption detection signal (g) to an inverter section (d). A load unit receives power interruption detection information and initiates power interruption processing and then urges processing required for power interruption. An uninterruptible power supply then counts a delay time stored in a nonvolatile memory based on an inverter stop command received, and delivers an inverter stop command to the inverter section (d) upon completion of counting.

Description

[Detailed Description of the Invention] The present invention relates to an uninterruptible power supply, which has unique processing functions such as memory saving and disk unmounting in the event of a power outage, and requires a certain delay time until power supply is stopped (inverter operation is stopped). The present invention provides a device suitable for supplying power to such a load.

Furthermore, the uninterruptible power supply can further expand the range of use by making it possible to easily change the delay time via communication as needed in response to a request from a load device.

FIG. 1 is an example of a conventional continuous commercial power supply system uninterruptible power supply. In the figure, 1 is a commercial input terminal, 2 is an output terminal, 3 is an AC switch for switching the energized circuit, 4 is an inverter section, 5 is a battery section with a charging circuit, 6 is a power failure circuit detection section, 7 is a power failure detection circuit, 8 is the power failure detection signal sent to the load, 9
is an inverter stop signal sent from the load device side to the uninterruptible power supply, and 10 is the load of the uninterruptible power supply.

During commercial power supply, the AC switch 3 is on, and commercial power is directly transmitted to the load 10 connected to the output terminal 2.

A portion of the battery is maintained in a state of charge by the charging circuit. The power failure detection circuit 6 sends a signal indicating that commercial power is being supplied to 7 and 8, and the inverter section 4 is stopped.

When a power outage occurs, the power outage detection circuit 6 immediately sends a power outage signal to 7 and 8. The inverter section 4 converts the direct current energy of the battery section 5 into alternating current energy and supplies power to the load 10 via the output terminal 2. At the same time, the AC switch 3 is in the off state. In the power outage operation, the load device enters power outage evacuation processing in response to the power outage signal sent in step 8, but generally the range in which the inverter stop signal in step 9 can be sent is complete processing within the processing procedure. It is before completion, and an inverter stop must be sent without guaranteeing completion of the process. In this way, in conventional devices, if the load device side requires a certain amount of time from the time it transmits the power supply stoppage to the uninterruptible power supply until it is in a state where the power supply can be stopped, the delay time cannot be secured. There was a drawback.

Furthermore, even if the delay time can be secured, the count value cannot be easily changed because it is only a fixed value, so there is an inconvenience that it cannot be adapted to the time required by the load device.

The present invention solves the above problem by storing the memory in a rewritable non-volatile memory inside the uninterruptible power supply using communication via RS232C, and storing the stored delay time from the time when the load-side inverter operation stop command is received. The purpose is to start counting the delay time, secure time for the load device to transition to a state where power supply can be stopped, and stop power supply to the load when the delay time counting is completed.

FIG. 2 shows an embodiment of the uninterruptible power supply of the present invention. In the figure, a is the commercial input terminal, b is the output terminal, C is the AC switch for switching the energized circuit, d is the inverter section, e is the battery part including the charging circuit, f is the power failure detection circuit, and g is the power failure to the inverter section. Detection signal, h is RS232C communication control unit, 1
is a nonvolatile memory and a timer counter, J is a power failure detection signal transmitted to the load, k is an inverter stop signal from the timer counter, l is an RS232C transmission line that communicates with the load, and m is a load that can communicate with R5232C. be.

The operation will be explained below with reference to the flowchart in FIG. First, when receiving commercial power, the AC switch C is in an on state, and commercial power is directly sent to the load m connected to the output terminal. The inverter section d is in a stopped state, and the battery section e is maintained and charged by a charging circuit. The power outage detection circuit f detects the commercial power supply status,
Signal g5j is in an initial state.

As shown in the flow of delay time setting in FIG. 3, the load device side can store the delay time until the inverter stops in the uninterruptible power supply when necessary through communication. - After setting the degree memory, this process is not necessary unless a change is required.

Next, when a power outage occurs, the power outage detection circuit f sends out a power outage detection signal g to the inverter section d. At the same time, power failure detection signal J
is sent to the R5232C adjective section.

As a result, the AC switch C is turned off, and the inverter section d converts the DC energy of the battery section e into AC energy, which is then supplied to the load m via the output terminal. On the other hand, the R3232C control unit h sends a power failure detection report shown in FIG. 3 to the load m. The load equipment starts power outage processing upon receiving the power outage detection notification, and first prompts the user using the load equipment or peripheral equipment to take necessary measures in response to the power outage occurrence. This period is the processing time shown by TA in Figure 3. be. Next, the load device sends an inverter stop command at the final stage when communication is possible before starting complete stop processing, and the time indicated by TB in FIG. 3 is used for continued processing. Based on the received inverter stop command, the uninterruptible power supply counts the delay time TD stored in the nonvolatile memory at l, and sends an inverter stop command k to the inverter unit d when the count is completed. Inverter section d immediately stops operating. Therefore, by selecting a TD that minimizes the time difference TC between the inverter unit and the load device shown in FIG. 3 when the power outage processing is completed, it is possible to efficiently utilize battery energy without wasting it.

As is clear from the above description, the present invention enables, for example, a computer system that employs UNIX as an operating system (OS) to carry out necessary power outage evacuation processing such as notifying the user of system outage at the same time as a power outage occurs. Then, before closing the communication port, an inverter operation stop command can be sent to the uninterruptible power supply to secure time until all processes are completed and the O8 is stopped.

Furthermore, since the delay time can be changed through communication, the computer itself can set the time suitable for the computer, thereby saving battery capacity without taking unnecessary delay time, which has practical effects from an economic standpoint. is big.

Note that the same function can be added to a constant inverter power supply type uninterruptible power supply device.

[Brief explanation of drawings]

Figure 1 is an example of a conventional device, Figure 2 is an embodiment of the present invention, and Figure 3 is an example of a conventional device.
The figure is a flowchart. In the figure, 1, a is a commercial input terminal, 2, b is an output terminal, 3, C is an AC switch, 4, d is an inverter section, 5,
e is a part of the battery with a charging circuit, 6, f is a power failure detection circuit, 7, g, 8, j are power failure detection signals, 9, k are inverter stop signals, 10, m are loads, h is an RS232C overconfidence control unit , 1 is a non-volatile memory and timer counting section, 1
is the R3232C transmission line, TA is the processing time during power outage in the range where communication is possible, TB is the processing time during power outage in the range where communication is impossible, T
C is the margin time from the completion of power outage processing to inverter stoppage, T
D is the inverter stop delay time.

Claims (3)

[Claims] (1) An uninterruptible power supply equipped with a battery charging circuit, a battery, an inverter circuit that converts the battery voltage to AC, and a load that requires a power outage processing function, equipped with an interface capable of communicating with RS232C, By storing the delay time until the inverter operation stops in a rewritable non-volatile memory installed in the uninterruptible power supply through communication in advance, the load can handle the power outage until the load can communicate when a power outage occurs. In order to guarantee the time it takes to complete the power outage processing after communication is no longer possible, the inverter circuit operation is stopped after the memorized inverter operation stop delay time has been counted. An uninterruptible power supply device characterized by: (2) When a computer system is stopped, a multi-process processing computer that needs to stop the running processes in an orderly manner is connected as a load, and the communication port can be used until the load completes process stop as part of the load when a power outage occurs. However, once the evacuation process is started in a single process, communication becomes impossible, so the pre-stored inverter operation stop delay time is started via communication before the single process starts, and the inverter operation is stopped after the processing time for the load is guaranteed. The uninterruptible power supply device according to claim (1), which is capable of (3) A computer system with a UNIX operating system (OS) that requires a system shutdown in single-user mode is connected as the load, and communication is not possible unless the load is in multi-user mode, so a power outage detection notification is sent. After receiving the request, all users are prompted to terminate the process, and after the termination grace period has elapsed, the inverter operation stop command is transmitted from the load via communication, and the load is shut down in single user mode within the pre-memorized inverter operation stop delay time. Patent claim No. 1 (
Uninterruptible power supply described in section 1).