JPS6096141A - Power source supplying circuit - 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] 〔Technical field〕 This invention relates to a power supply circuit.

[Background technology]

Automatic control equipment in factories that are normally used intermittently and electrical equipment for office processing (Word processor).

facsimiles, copy machines, etc.) are electronic circuits and lamps,
These devices are often complex products such as motors, and as shown in Figure 1, these devices have an electronic circuit section l and a lamp section.
The motor circuit 2rI'i is often separated. The electronic circuit section 1 is connected to an AC commercial input power source (AC100V or AC2).
00V) 3, a power source section 4 that cannot be operated is provided, and is replaced with a direct current source using a switching regulator method or the like. When the input power source 3 is turned on, this power source section 4 is rectified by a rectifying diode 5, voltage is controlled by phase control by a thyristor 6, high frequency switching is performed by a transistor 7, and then the voltage is stepped down by a transformer 8 to be used in the subsequent stage. Diode r9, 1o and reactor 11. The capacitor 12 converts the current into direct current. No. 13 is a capacitor. In such a device, the standby circuit section IB of the electronic circuit section 1 is in operation in a normal standby state, and the switch 1 is turned on by an external signal such as a push button switch or a telephone line reception.
4 turns on, the other circuit section 1b of the electronic circuit section 1
The lamp/motor circuit 2 necessary for reading etc. is activated.

At this time, as shown in FIG. 2, a current approximately 3 to 10 times greater than when it is stable flows through the device. So the input of these devices? lJ
The wire connected to 3 needed to be thick in consideration of the current at startup, and sufficient consideration was required in calculating the voltage drop at that time and selecting the input power supply capacity. On the other hand, when it comes to large-capacity equipment, the allowable current of electrical equipment technical standards and extension regulations may be exceeded, and general wiring methods (
Since it cannot be used with a 1.5A branch circuit using AC100■ wiring), it was necessary to use special wiring exclusively for these devices. Furthermore, these devices, including the standby circuit section 18, have the disadvantage that they cannot perform their functions at all due to an instantaneous voltage drop in the input power source 3 or a short power outage.

[Purpose of the invention]

1- Therefore, an object of the present invention is to provide a power supply circuit that suppresses and equalizes the input current at the time of device startup with a simple configuration, and is not affected by instantaneous voltage drops. be.

[Disclosure of the invention]

It is characterized by supplying power to loads with a large inrush current that are used intermittently. Since the load is used intermittently, excessive current during on-time is discharged from the storage battery, and the storage battery is charged by the charging circuit during standby time. That's no good,
The input current of the load is made uniform, instantaneous voltage drop, etc. are not affected, and many other effects described in detail below can be obtained.

A first embodiment of the invention is shown in FIGS. 3 to 5.

That is, 15 is an input power supply, 16 is a power transformer, and 17
18 is a rectifier diode, 18 is a smoothing capacitor, 19 is a charging circuit, 21 is a storage battery, 21 is a switch that turns on the load, 22 is a standby circuit section of the electronic circuit section 23 of the load, and 24 is activated when the switch 21 is turned on. The other circuit sections 25 of the electronic circuit section 23 are circuit sections such as motors, lamps, etc., which require excessive input current. Normally, the voltage is stepped down by the power transformer 16, rectified by the rectifying diode 17, and the charging circuit 19 charges the storage battery 20 and supplies power to the standby circuit section 22.

Signals from outside (signal reception from pushbutton switch or telephone line)
When the switch 21 is turned on, the inrush current and operating current are supplied from the storage battery 20 and the charging circuit 19. On the other hand, when the load (equipment) enters the standby state, charging of the storage battery 20 is started and power is supplied to the standby circuit section 22 in the same manner as described above, resulting in a so-called floating usage state.

After that, the storage battery 20 is charged every time the load is used intermittently.
The discharge and charge of the battery 20 are repeated, and the inrush current is supplied from the storage battery 20 to the load. FIG. 4 is a time schedule of the operating state of this power supply circuit, in which (a) shows the input current of the device, and (b) shows the output current of the charging circuit 19 and the discharge current of the storage battery 20.

Note that the condition is that the amount of charge of the storage battery 20 is greater than the amount consumed during standby. Further, as shown in FIG. 5, the capacity of the charging circuit can be made smaller than the maximum capacity at the time of starting the load.

With this configuration, this power supply circuit has the following effects. That is, (1) Since the excessive current that flows when the switch 21 is turned on is discharged from the storage battery 20, the input current when the load (equipment) is turned on can be suppressed and equalized, and the wiring on the input side, input image,
Since the source capacity can be reduced, the cost of installing the system can be significantly reduced. In other words, it is no longer necessary to provide special dedicated 200cm wiring as in the past.

[F]) Since the storage battery 20 is used, the input power source 1
5, the surges and noises applied are sufficiently absorbed, making it possible to reduce the noise countermeasures that have been indispensable up until now. Therefore, there is no need to switch the cylindrical frequency using a semiconductor as in the conventional case.

(3) Connect the lamp for reading up to this point to the commercial input power supply 1.
It is taken directly from 5, and flickering due to exchange occurs (
Even when alternating current was used after rectification, it was a pulsating current, so even if the frequency was increased, it was a pulsating current), but since it is connected to the storage battery 20,
No flickering occurs at all.

(4) Up until now, the commercial input power supply 15 has been used directly for the motor/lamp circuit 25, so frequency fluctuation, distortion rate, etc.
It used to be affected by voltage fluctuations, but because it utilizes constant voltage performance, which is a unique characteristic of storage batteries, it is hardly affected.

(5) It can be used even when the input power source 15 has an instantaneous voltage drop or is stopped for a short time because it is supplied by the storage battery 20.

A second embodiment of the invention is shown in FIG. That is, each of the plurality of loads 26 to 28 that are used intermittently is
It is connected to the power supply circuit 29 shown in the embodiment. In this way, the input currents of the loads 26 to 28 are further uniformized, and the uniformity effect of the present application is further expanded. In addition, this embodiment has the same effects as the first embodiment.

A third embodiment of the invention is shown in FIG. That is, in place of the commercial input power source 15 of the first embodiment, the solar cell 30
It uses Since the load 31 is connected to the storage battery 20, the electric current can be used not only for AC but also for the solar battery 30.

A fourth embodiment of the invention is shown in FIG. That is, since the standby circuit section 22 of the electronic circuit section 23 always consumes constant current and power, it has a dedicated AC/DC conversion constant voltage power supply circuit 32 and is used intermittently. 23 and other circuit sections 24 and circuit sections 25 such as the entry surface and the motor lamp with excessive flow are combined into a power supply circuit 29.
The load is as follows.

Incidentally, instead of the storage battery 20, a large capacity (μF) capacitor may be used.

〔Effect of the invention〕

As described above, according to the power supply circuit of the present invention, with a simple configuration, it is possible to equalize the input current when a load that is used intermittently and has an excessive rush current is turned on, and to prevent instantaneous voltage drops and other various fluctuations. This has the effect of reducing the cost of the entire system.

[Brief explanation of the drawing]

Fig. 1 is a power supply circuit diagram of a conventional example, Fig. 2 is a load input current characteristic diagram when using the same, Fig. 3 is a power supply circuit diagram of a first embodiment of the present invention, and Fig. 4 is a load Figure 5 shows the input current of the charger, the output current of the charger, and the discharge current characteristics of the storage battery. Figure 5 is the characteristic diagram at load startup, which explains the maximum current response at load startup and the current capacity of the charging circuit. Figure 6 7 is a power supply circuit diagram of the second embodiment, FIG. 7 is a power supply circuit diagram of the third embodiment, and FIG. 8 is a power supply circuit diagram of the fourth embodiment. 15... Input, source, 19... Charger circuit, 20
...Storage battery, 25...Motor/lamp etc. circuit (load), 26-28.31...Load, 29...Power supply circuit, 30...Solar battery Yuji, on the rudder l Three signatures ↑ (Spontaneous lambda December 130, 1982 Patent Application No. 202965 2, Name of the invention Power supply circuit 3, Person making the amendment Relationship with the case 14 Surrender 4, Attorney 5, Amendment order Voluntary amendment 6, amended column number Specification and drawings (1) The claims of the specification are amended as shown in the attached sheet. (2) Page 3 of the specification, lines 16 to 19, "For power supply...
It is said that... "The storage battery is charged by a charging circuit connected to a commercial power source and whose output capacity is selected to be smaller than the negative capacity, and this storage battery is used to supply power to the negative battery, which has a large inrush current and is used intermittently. It is characterized by supplying (3) Page 7 of the specification, lines 10 to 14, [This invention......] ” was deleted. (4) On page 7, line 15 of the specification, the phrase "the fourth embodiment is shown in FIG. 8" is corrected to "the third embodiment is shown in FIG. 7". (5) Page 8 of the specification, lines 3 to 4, “Please note...
······can. ” will be deleted. (6) From page 8, line 20 to page 9, line 1 of the specification, [Power supply circuit diagram]. ] It says “
It is a power supply circuit diagram. ” he corrected. (7) Delete "30...solar cell" from line 4 to line 5 on page 9 of the specification. (8) Figure 7 of the drawings will be deleted and the figure number of Figure 8 will be corrected to Figure 7 as indicated in the attached red ink. 2. Patent a? A range of special-numbered TX power supply circuits.

Claims (1)

[Claims] An NfA supply circuit comprising an electric conductor, a charging circuit connected to this power supply, and a load with a large inrush current.