JPS63282812A - Power supply device - Google Patents

Abstract

PURPOSE:To exclude work restriction and system down from a load by detecting an input current supplied from a prescribed commercial power supply, controlling so as to supply supplementarily power from a prescribed battery when electric power supplied to the load is lacking. CONSTITUTION:When it is defined that current outputted from a power composing circuit is IO, its maximum value is ICmax and the maximum value of current Il is Ilmax, an electrifying circuit 3 is inhibited from using current IC through control based upon a control circuit 2 when IO>=Ilmax is formed. The control circuit 2 controls a power synthesizing circuit 5 so that current flowing from the circuit 1 does not exceed the Ilmax. Electric power corresponding to current lacking IO-Ilmax is entered from the battery 4, inputted to the circuit 5 and synthesized with electric power sent from the circuit 1 and the synthesized power is outputted through a terminal 52. Consequently, the necessity for work restriction to the load can be removed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device, and particularly to a power supply device configured for a load with a difference between an average output current and a maximum output current.

[Conventional technology]

Generally, in a power supply device, for example, the commercial power supply is
If up to 5A (ampere) can be tolerated, the load corresponding to the power supply device should be operated under conditions of use where the maximum current is 15A or less, or for multiple loads, the average current value should be set as above. Generally, they are operated under conditions of use of 15A or less. In some cases, a commercial power source is expanded in accordance with the capacity of the load to supply the necessary current.

[Problem that the invention attempts to solve]

In the conventional power supply devices mentioned above, it is usually impossible to operate all of multiple loads at the same time, and it is necessary to set operating limits for the loads. However, there are disadvantages in that failures such as power outages and system failures may occur. Furthermore, expanding the commercial power supply as a countermeasure has the drawback of increasing initial costs and operating costs, which is a factor in increasing costs.

[Means for solving problems]

The power supply device of the present invention includes an input current detection circuit that detects an input current supplied from a commercial power source or the like and outputs predetermined current value data and a predetermined current; and a control circuit that outputs a second control signal, a charging circuit that performs a charging action corresponding to the charging current sent from the input current detection circuit via the first control signal, and the charging circuit. a storage battery charged with the charging current via the second control signal;
It is configured to include a power combining circuit that combines and outputs the current sent from the navigation input current detection circuit and the current sent from the storage battery.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of the present invention. As shown in FIG. 1, this embodiment includes an input current detection circuit 1, a control circuit 2, a charging circuit 3, a storage battery 4, and a power combining circuit 5.

In FIG. 1, a current is supplied from a commercial power source through a terminal 51 and input to the input current detection circuit 1. As shown in FIG. The input current detection circuit 1 receives an input from the commercial power supply. A current (2) is detected, predetermined current value data is output and input to the control circuit 2, and a predetermined current is output and sent to the charging circuit 3 and the power combining circuit 5. In the control circuit 2, a predetermined control signal is generated with reference to the current value data inputted from the input current detection circuit 1,
It is sent to the charging circuit 3 and the power combining circuit 5.

Now, the current output from the power combining circuit 5 is I.

, the maximum value of this IO is ■. , ,X, the current input from the input current detection circuit 1 to the charging circuit 3 is Ic, the maximum value of Ic is Icm8, and the maximum value of the current Ie is . ,
Then, the operation of the control circuit 2 can be explained as follows.

If the current Io is small, I o < I z□x I
In the case of C□8, in the charging circuit 3, the control circuit 3
The storage battery 4 is controlled by a control signal sent from
A charging action by Ic is carried out on. On the other hand, the power combining circuit 5 is controlled by a control signal sent from the control circuit 3, and the supply of power from the storage battery 4 to the power combining circuit 5 is prohibited. Therefore, the current flowing into the power combining circuit 5 from the input current detection circuit 1 is
It is directly outputted as To via the terminal 52.

Then the current IO is Ilma, I c---< I
o <■2□8, the charging circuit 3 receives the control signal from the control circuit 2. As ■o≦■
, □x Ie.

Further, the control action of the control circuit FI@2 on the power combining circuit 5 is the same as in the case of I o <Ie□X I CoNx described above.

Next, the current IO is ■. If ≧I l fia is I
It is controlled so that it does not exceed lff1ax. In this case, the power corresponding to the current shortage I OI Q IIILX is taken from the storage battery 4 and input to the power combining circuit 5, where it is combined with the power sent from the input current detection circuit 1. and is outputted via the terminal 52.

Next, a second embodiment of the present invention will be described.

FIG. 2 is a block diagram of the second embodiment. As shown in FIG. 2, the configuration of this embodiment is similar to that of the first embodiment, except that the terminal 54 is connected so that the output current can be directly taken out from the input current detection circuit 1. It is something that has been added.

In this second embodiment, the maximum current at terminal 54 is I! A load of less than m□ (not shown) is connected,
Further, a residual load (not shown) is connected to the terminal 55, so that the output of the power combining circuit 5 can be reduced compared to the case of the first embodiment.

〔Effect of the invention〕

As explained above, the present invention detects the input current supplied from a predetermined commercial power source, and when the amount of power supplied to the load is insufficient, power is supplemented from a predetermined storage battery. By controlling in this way, it is possible to eliminate operational restrictions on loads and system downtime, and there is an effect that increases in costs such as initial costs and operating costs can be eliminated.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 are block diagrams showing main parts of a first and second embodiment of the present invention, respectively. In the figure, 1... input current detection circuit, 2... control circuit, 3... charging circuit, 4... storage battery, 5... power synthesis circuit. 70. Input power output 2, control circuit 4. '& Kamefume 3.4 Charging Bako Trap 5. Power combining circuit Figure 1 Figure 2

Claims (1)

[Claims] an input current detection circuit that detects an input current supplied from a commercial power source or the like and outputs predetermined current value data and a predetermined current; and an input current detection circuit that inputs the current value data and outputs predetermined first and second control signals. a control circuit that outputs the charging current; a charging circuit that performs a charging action corresponding to the charging current sent from the input current detection circuit via the first control signal; a storage battery to be charged; and a power combining circuit that combines and outputs the current sent from the input current detection circuit and the current sent from the storage battery via the second control signal. A power supply device comprising: