JPS61106034A - Uninterruptible power equipment - Google Patents

Abstract

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

Description

Detailed Description of the Invention: This invention relates to an uninterruptible power supply for data systems, such as personal computer systems or microcomputer systems, and in particular protects programs related to these small computer systems from being destroyed by a commercial power outage or, more specifically, by an instantaneous power outage. This invention relates to a protected uninterruptible power supply device.

Conventionally, when a power outage or voltage drop occurs in the commercial AC power supply while a personal computer system is in operation, the system or application program under development that resides only in its main memory, or RAM, is completely or incompletely destroyed. Therefore, there was a serious inconvenience in that the human resources concentrated during this period were wasted.

In order to avoid such abnormal situations, so-called uninterruptible power supplies are sometimes used in general computer systems, but such uninterruptible power supplies are quite large in size and weight. Because they are extremely large and expensive, they are completely impractical in personal computer applications, and have not been used except in special cases.

The uninterrupted power supply device of the present invention solves the above-mentioned problems, and has at least a small size and weight that can be used in small computer systems such as personal computers, and a low cost. The present invention provides an inexpensive uninterrupted power supply device.

The present invention will be explained in detail with reference to drawings showing one embodiment of the uninterrupted power supply device of the present invention. In FIG. Ordinary commercial power supply (AC 100, 50/
60 SE) via an outlet, plug, etc. 2
A is a first output terminal, which is connected to a computer system, eg, a personal computer, a disk drive unit, etc. 2b is a second output terminal, which is connected to a peripheral device such as a printer that is not directly related to program destruction. 3a is a relay coil, its relay contact 3b,
More specifically, the N C (Normal C1osed) contact is connected to commercial power supply side terminal 1 and computer system side terminal 2.
Provided between a. Relay contact 3c is N.

(Normal 0 penl contact and the relay contact 3b
Provided in parallel with. The relay contact 3d is provided, for example, on the input side of the impark.

4 is a single transformer consisting of a first winding 4a, a second winding 4b and a third winding 4c, and the first winding 4a is connected to the first output terminal via a parallel relay contact 3c and a shunt resistor 5. It is connected to 2a. The second output terminal 2b is short-circuited to the commercial power supply side terminal 1.

6 II A C-DC conversion circuit, which is a circuit including, for example, a diode array, and the second coil 4b of the transformer 4 is connected to its input side. Reference numeral 7 indicates a battery, for example, a lead-acid battery having a sealed structure. Reference numeral 8 denotes an inverter, which is composed of 9 components including, for example, an oscillation circuit. Reference numeral 9 denotes a power failure detection circuit, which includes, for example, a rectifier circuit using a diode array, and when the commercial power supply fails, the output changes from a low voltage level to a high voltage level, thereby starting the inverter 8 via the relay 3. Reference numeral 10 denotes an alarm circuit which uses an auditory means such as a buzzer or a visual means such as a light emitting diode, and is configured to emit a sound or emit light when the input reaches a high voltage level.

To explain the power outage detector 9 in more detail, as an example is shown in FIG. and a photocoupler 15, and this output switches the relay 3 to connect the battery 7.
is connected to the remaining circuit 16 containing the .

An example of the uninterruptible power supply device of the present invention is configured as described above, and will be explained in more detail according to its operation below.When the commercial power supply is in a non-interruption state, the power failure detection circuit 9 outputs a low voltage level, for example. , the relay coil 3a is not excited, and the inverter 8 and alarm circuit 10 are not operated. Therefore, as shown in the figure, the relay contact 3b is closed and the relay contact 3c is open. In this normal state, power is directly supplied from the commercial power supply side terminal 1 to the first and second output terminals 2a and 2b, but at this time, the power is supplied to the first winding through the shunt resistor 5. 4a to 1
AC-DC as the secondary winding and the second winding 4b as the secondary winding.
The battery 7 is sequentially charged via the conversion circuit 6.

On the other hand, during a power outage of the commercial power supply, the power outage detection circuit 9 outputs a high voltage level, excites the relay coil 3a, switches the relay contacts 3b and 3c, and puts the inverter 8 and alarm 1o into operation.

That is, in this state, the relay contact 3b is open, the relay contact 3c is closed, the oscillation circuit in the impark 8 oscillates, the direct current from the battery 7 is converted to alternating current, and the third volume n4c is The next winding is the first winding 4a.
It is outputted to the first output terminal 2a as the next winding. In the event of a power outage, the alarm circuit 10 operates to notify the operator of the situation. Note that at this time, the second output terminal 2
b does not output power.

The power supply device of the present invention is constructed as described above, converts the relationship between the primary side and the secondary side of a single transformer, outputs the power normally when the commercial power supply is energized, and charges the power, In addition, in the event of a power outage, the charged power is automatically supplied to the first output terminal, and since it is a single transformer, it is smaller in size and weight, and is clearly advantageous in terms of price. Furthermore, two types of output terminals 2a and 2b are provided, and terminal 2a is connected to a computer, etc., and terminal 2b is connected to a printer, etc., so that charging power can be maintained for a long time in the event of a power outage. It has many effects.

[Brief explanation of drawings]

1 and 2 are circuit diagrams showing one embodiment of the present invention.

Claims (1)

[Claims] In a power supply device for a small computer system, such as a personal computer system, it outputs normally when there is no commercial AC power outage, and the first winding of a single transformer is the primary winding, and the second winding is the secondary winding. After passing through as the next winding, AC-DC conversion is performed, and then the battery is charged. In the event of a power outage, a power outage detection circuit detects the power outage and converts the DC of the battery to AC via the inverter, and the third winding of the transformer. The wire is used as a primary winding, the first winding is outputted as a secondary winding, and the power failure detection circuit has a diode array, a constant voltage circuit, a voltage monitoring circuit, and a photocoupler, and the output is used to switch the power supply. An uninterruptible power supply characterized by driving a switch.