JPS62100143A - Non-interruption electric source - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an uninterruptible power supply device for computers, instrumentation equipment, etc.

[Conventional technology]

As shown in FIG. 2, the uninterruptible power supply device 11 includes a rectifier 11 connected to a commercial AC power source, an inverter 13 that converts the DC power of the rectifier 11 into AC power, and supplies the AC power to the load 2. It consists of a battery 12 connected to a DC intermediate circuit between a rectifier 11 and an inverter 13 to enable uninterrupted power supply to the load 2. The rectifier 11 is made of a diode or a thyristor, and is equipped with a DC voltage smoothing filter. The inverter 13 consists of a thyristor or transistor and is equipped with an output transformer and an output voltage sinusization filter. A switch 14 such as an electromagnetic switch is provided between the inverter 13 and the load 2. The load 2 is shown here as three loads 21, 22, 23.

When the commercial power supply is normal, power is supplied from the rectifier 11 to the load 2 through the inverter 13, and at the same time, the battery 12 is charged. Battery 1 during a commercial power outage
Power is supplied to the load 2 from the inverter 2 through the inverter 13.

[Problems to be solved by the present invention] However, in conventional uninterruptible power supply devices of this type, the battery capacity is determined by the guaranteed power supply time to the load during a power outage.
If even one of the loads 2 requires a long-term guarantee, select a battery accordingly.
Therefore, it is an object of the present invention to eliminate the problem of the need for large capacity batteries and to make it possible to reduce the capacity of the battery without causing any practical harm to the individual loads. The purpose of the present invention is to provide an uninterruptible power supply device.

[Means for solving problems]

According to the present invention, the above object is achieved by providing a load circuit divided into a plurality of parts according to the guaranteed power supply time required for each load during a power outage period of the AC power source, and each load circuit has a separate load circuit that is divided into a plurality of parts according to the guaranteed power supply time required for each load during a power outage period of the AC power source. This is achieved by providing a switch that can cut off each load circuit according to the guaranteed power supply time.

[Operations and Effects] The present invention provides that, among the loads supplied with power by an uninterruptible power supply device, there are those whose guaranteed power supply time is long, those whose guaranteed power supply time is short, or those whose guaranteed power supply time is hardly required in the event of a commercial power outage. This system focuses on the fact that it is only necessary to guarantee the power supply time in the event of a power outage for each load, and multiple load circuits are provided that classify the loads into long and short periods as described above, and a The load circuit is cut off by the switch after a predetermined guaranteed power supply time has elapsed. This reduces the overall load on the battery during power outages.

Therefore, the battery capacity can be reduced compared to conventional devices, thus reducing device cost and size.

〔Example〕

FIG. 1 shows an embodiment of an uninterruptible power source device according to the present invention.

The difference from the conventional device shown in Fig. 2 is that the load 2 is classified into multiple load circuits according to the required guaranteed power supply time in the event of a power outage, and switches 14 to 16 are inserted in each load circuit. be. Here, it is divided into three load circuits 21-23.

When a power outage of the commercial power supply is detected by the power outage detector, a timer built in the control device of each switch 14 to 16 is started by an output signal of the power outage detector. Each timer has an operating time limit set according to the guaranteed power supply time in the event of a power outage, and gives a trip command to the corresponding switch when the set time limit is reached. As a result, loads requiring less power supply time are sequentially disconnected from the connected load feeder. If the power is restored during the process, all timers are reset and the feeder switches that have already been cut off are turned on again.

Thus, according to the present invention, the overall load on the battery during a power outage period is reduced, thereby reducing battery capacity and device cost and size.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of an uninterruptible power source device according to the present invention, and FIG. 2 is a block diagram showing an embodiment of a conventional uninterruptible power source device. DESCRIPTION OF SYMBOLS 1... Uninterruptible power supply device, 2... Load, 11... Rectifier, 12... Battery, 13... Inverter,
14-16... Switch, 21-22... Load. Z? ? (!1 year old 1 figure

Claims (1)

[Claims] A rectifier connected to an AC power source, an inverter that converts the DC power of the rectifier into AC power and supplies it to the load, and a DC intermediate circuit between the rectifier and the inverter to enable uninterrupted power supply to the load. In an uninterruptible power supply device consisting of a battery connected to An uninterruptible power supply device characterized by being provided with a switch that makes it possible to cut off each load circuit according to each guaranteed power supply time during a power outage.