JP2001245440A - Charging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable direct power charge from a DC source to a built-in battery of an electric equipment. SOLUTION: Applied DC power is charged to a condenser 33 of an intermittent changeover circuit 30, and the condenser 33 is charged and discharged conducting switch on-off of transistors 31, 32 with an AC signal from an AC- generating circuit 10. The discharged DC power is smoothed and raised by a smoothing condenser 3, and then output.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a charging device suitable for charging electric power from a DC power supply.

[0002]

2. Description of the Related Art For example, when charging a built-in battery of an electric device such as a radio or a lighting device used outdoors, a commercial power supply of AC100V is connected to a DC of several volts, for example.
Is used to convert the battery into a battery.

[0003] Further, when charging the above-described battery of an electric device with electric power from, for example, a cigar socket of a car, for example, an inverter for converting DC12V to AC100V, and the converted AC100V to several volts by the charger described above. It is performed by converting to DC.

[0004]

As described above, when charging the power from the DC power supply (for example, DC 12 V) to the internal battery of the electric equipment, the inverter for converting the DC power supply to the AC power supply, the converted AC power supply, and the like. For a few volts of D
A converter for converting into C is required. For this reason, if the power from the DC power supply can be directly charged into the built-in battery of the electric device by a single charging device, the convenience is further improved.

[0005] By the way, in the case of charging power from a solar cell, an inverter for converting a DC power supply into an AC power supply is similarly required.

[0006] In view of the above, there is a demand for the development of a charging device that can directly charge power from a DC power supply into a built-in battery of an electric device.

The present invention has been made in view of such a situation, and it is an object of the present invention to provide a charging device capable of directly charging power from a DC power supply to a built-in battery of an electric device. .

[0008]

According to a first aspect of the present invention, there is provided a charging device, comprising: an input terminal to which DC power is applied; a capacitor for charging the applied power; and a capacitor. An intermittent switching circuit (30) having transistors (31, 32) for charging / discharging the DC / DC converter, and an AC generation circuit (AC) for generating an AC signal for turning on / off the transistors (31, 32). 10); a smoothing capacitor (3) for smoothing and boosting the power discharged from the capacitor (33); and an output terminal (2) for outputting the power boosted by the smoothing capacitor (3). It is characterized by the following. On the input terminal (1) side, a DC power supply circuit (70) having a rechargeable battery (71) for charging power from an external generator is provided, and an intermittent switching circuit (30) is provided with an AC generation circuit ( A plurality of rechargeable batteries (46) for charging the power discharged from the capacitor (33) and an output from the rechargeable battery (46) are provided on the output side of each of the intermittent switching circuits (30). Smoothing capacitor (45) for charging discharged power
And a charge / discharge circuit (40) having transistors (43, 44) for charging / discharging the smoothing capacitor (45). Each charge / discharge circuit (40) is connected to the output side of the charge / discharge circuit (40). Is connected in series to each smoothing capacitor (45), and a pulsating flow smoothing capacitor (50) for smoothing the boosted power from each smoothing capacitor (45) is connected to the pulsating flow smoothing capacitor (50). An AC power supply circuit (60) for converting DC from the pulsating flow smoothing capacitor (50) into AC can be connected to the output side of the power supply. A DC power supply circuit (70) having a rechargeable battery (71) for charging electric power from an external generator and a plurality of the charging devices according to claim 3 are provided in parallel with the DC power supply circuit (70). An intermittent switching circuit (30) having a capacitor (33) for charging power from the rechargeable battery (71) and an interlocking switch (38) for charging and discharging the capacitor (33); and a capacitor (33) A smoothing capacitor (3) for smoothing and boosting the power discharged from the battery, a rechargeable battery (46) for charging the power discharged from the capacitor (33), and a power discharged from the rechargeable battery (46). A smoothing capacitor (45) to be charged and an interlocking switch (4) for charging and discharging the smoothing capacitor (45)
9) is connected in series to each of the smoothing capacitors (45) of each of the charge and discharge circuits (40), and smoothes the boosted power from each of the smoothing capacitors (45). A pulsating flow smoothing capacitor (50). In the charging device according to the present invention,
The applied DC power is charged in the capacitor (33) of the intermittent switching circuit (30), and the transistors (31, 3) are supplied by an AC signal from the AC generation circuit (10).
2) is turned on / off to charge and discharge the capacitor (33), and the discharged power is used as a smoothing capacitor (3).
And output after smoothing and boosting.

[0009]

Embodiments of the present invention will be described below.

(First Embodiment) FIG. 1 is a circuit diagram showing a first embodiment of the charging device of the present invention.

The charging device shown in FIG. 1 has an input terminal 1, an output terminal 2, a pulsating flow smoothing capacitor 3, an AC generation circuit 10,
An AC amplification circuit 20 and an intermittent switching circuit 30 are provided.

For example, DC 12 V is applied to the input terminal 1, and DC 16 V, for example, is output from the output terminal 2. The input terminal 1 can have a shape that can be attached to, for example, a cigar socket of a car.

The AC generator 10 generates an AC signal by the transistors 11 and 12 which perform on / off operations when the switch 23 is turned on.
The transmission frequency at this time is determined by the values of the capacitors 11a and 12a and the resistors 11b and 12b.

The generated AC signal is supplied to a stabilizing transformer 1
4 to the AC amplifier circuit 20. The AC amplifying circuit 20 includes amplifying transistors 21 and 2 connected in a complementary and symmetric manner.
Two. The respective amplifying transistors 21 and
The signal amplified by 2 is output via resistors 20a and 20b.

The intermittent switching circuit 30 includes transistors 31 and 32, a capacitor 33, backflow blocking diodes 34 and 35, and a resistor 36, which are connected to each other at their bases. The signal output via the resistor 20a is
Given to 32 bases. The signal output via the resistor 20b is provided to the collector of the transistor 31 and the emitter of the transistor 32.

When the pulse of the signal output via the resistor 20a is high, the transistor 32 is turned on (the transistor 31 is turned off). When the pulse is low, the transistor 32 is turned off (the transistor 31 is turned off).
Is on). Thus, charging and discharging of the capacitor 33 are performed. The power discharged by the capacitor 33 is smoothed by the pulsating flow smoothing capacitor 3 and then output to the output terminal 2.
For example, at 16V. In this case, the switch 2a is switched to the resistor 36 side.

Next, the operation of the charging device having such a configuration will be described.

First, the input terminal 1 is mounted on, for example, a cigar socket (for example, 12 V) of a car. Output terminal 2
Connect to the input terminal of electric equipment such as radio or lighting equipment with built-in battery.

When the switch 23 is turned on, an AC signal is generated by the on / off operation of the transistors 11 and 12 of the AC generation circuit 10. The generated AC signal is provided to the AC amplifier circuit 20 after being stabilized by the stabilizing transformer 14.

In the AC amplifier circuit 20, the transistor 2
After amplifying the AC signal stabilized by 1 and 22,
This is applied to the transistors 31 and 32 of the intermittent switching circuit 30 via the resistors 20a and 20b.

When the pulse of the signal output through the resistor 20a is low, the transistor 32 is turned off (the transistor 31 is turned on), so that the power (12 V) from the input terminal 1 is supplied to the reverse current blocking diode 34. Is charged to the capacitor 33 via the.

On the other hand, when the pulse of the signal output via the resistor 20a is high, the transistor 32 is turned on (the transistor 31 is turned off), so that the power charged in the capacitor 33 is discharged.

At this time, the electric power discharged from the capacitor 33 is smoothed by the smoothing capacitor 3 and then output from the output terminal 2 at, for example, 16V. Here, the electric power discharged from the capacitor 33 is applied to the smoothing capacitor 3.
When it is smoothed, it is boosted by a little over 1.3 times.
As a result, even if the internal resistance of an electric device such as a radio or a lighting device having a built-in battery is high, the built-in battery is charged.

As described above, in the first embodiment, the applied DC power is supplied to the capacitor 3 of the intermittent switching circuit 30.
3, the transistors 31 and 32 are turned on / off by an AC signal from the AC generation circuit 10 to charge and discharge the capacitor 33, and the discharged power is smoothed and boosted by the smoothing capacitor 3. Since the output is performed, the electric power from the DC power supply can be directly charged into the built-in battery of the electric device.

(Second Embodiment) FIG. 2 is a circuit diagram showing a charging device according to a second embodiment of the present invention. In addition,
In the drawings described below, portions common to FIG. 1 are denoted by the same reference numerals.

The charging device shown in FIG. 2 includes a pulsating flow smoothing capacitor 3, AC generation circuits 10 and 10a, AC amplification circuit 2
0, intermittent switching circuit 30, charging / discharging circuit 40, pulsating flow smoothing capacitor 50, AC power supply circuit 60, DC power supply circuit 70,
A main switch 80 is provided.

As described above, when the switch 23 is turned on, the AC generation circuits 10 and 10a
Turning on / off 12 generates an AC signal.

The generated AC signal is supplied to the stabilizing transformer 1
4 to the AC amplifier circuit 20. A DC / AC conversion transistor 20A and a branch transformer 20B are connected to the AC amplifier circuit 20.

The primary side of the branch transformer 20B is connected to the transistors 31 and 32 of the intermittent switching circuit 30.
The secondary side of the branch transformer 20B is connected to the transistor 41 of the charge / discharge circuit 40 and the transistor 61 of the AC power supply circuit 60.
It is connected to the.

A plurality of intermittent switching circuits 30 are connected in parallel to the DC power supply circuit 70. Intermittent switching circuit 30
Includes transistors 31, 32, a capacitor 33, and backflow blocking diodes 34, 35, 37. The charge / discharge circuit 40 is connected to the intermittent switching circuit 30 via the pulsating flow smoothing capacitor 3, the backflow prevention diode 38, and the resistor 39.

The charging / discharging circuit 40 includes a transistor 41, an inverter transformer 42, transistors 43 and 44, a smoothing capacitor 45, a rechargeable battery 46, and a reverse current blocking diode 4.
7, 48. The rechargeable battery 46 is charged with the power smoothed by the pulsating flow smoothing capacitor 3. Further, the power charged in the rechargeable battery 46 is smoothed by the pulsating flow smoothing capacitor 50 after being smoothed by the smoothing capacitor 45. Here, the pulsating flow smoothing capacitor 50 is connected in series to the smoothing capacitor 45 of each charge / discharge circuit 40.

The AC power supply circuit 60 is connected to the DC power supply circuit 70 and the AC generation circuit 10a. The AC power supply circuit 60 is connected to the positive side of the pulsating flow smoothing capacitor 50 via the main switch 80.

The AC power supply circuit 60 includes a main switch 80
Is turned on, the transistor 61 is turned on / off by an AC signal generated from the AC generation circuit 10a, and the DC / AC conversion transistor 63 is turned on / off. Convert to The alternating current is obtained from an alternating current generating circuit 62.

The DC power supply circuit 70 includes a rechargeable battery 71 and a smoothing capacitor 72. The rechargeable battery 71 can be charged with electric power from, for example, a solar cell as an external power generator. When the power charged in the rechargeable battery 71 is discharged, the power is smoothed by the smoothing capacitor 72.

Next, the operation of the charging device having such a configuration will be described.

First, the switch 23 is turned on to generate an AC signal from the AC generation circuit 10. At this time, when the transistor 31 of the intermittent switching circuit 30 is turned on and the transistor 32 is turned off by the AC signal, the electric power charged in the rechargeable battery 71 of the DC power supply circuit 70 is charged in the capacitor 33. Further, when the transistor 31 of the intermittent switching circuit 30 is turned off and the transistor 32 is turned on by the AC signal, the electric power charged in the capacitor 33 is discharged and smoothed by the pulsating current smoothing capacitor 3 and then charged and discharged. The rechargeable battery 46 of the circuit 40 is charged. Here, the electric power charged in the rechargeable battery 46 has been boosted by the pulsating flow smoothing capacitor 3 and is, for example, 12
V.

Therefore, by using the electric power charged in the rechargeable battery 46, it is possible to drive electric equipment such as a radio and lighting equipment.

When an AC power source is used by using the power charged in the rechargeable battery 46, the main switch 80 is turned on to discharge the power charged in the rechargeable battery 46. At this time, the transistor 41 is turned on / off by the output of the secondary side of the branch transformer 20B, and the pulse power reduced by the inverter transformer 42 is supplied to the transistors 43 and 44.
Given to the base. Thereby, the transistor 4
The power charged in the rechargeable battery 46 is smoothed by the smoothing capacitor 45 and then smoothed by the pulsating flow smoothing capacitor 50 and output to the AC power supply circuit 60 side.

At this time, the power supplied to the pulsating flow smoothing capacitor 50 is boosted by the smoothing capacitor 45. The electric power supplied to the pulsating flow smoothing capacitor 50 is supplied to the smoothing capacitor 45 of each charge / discharge circuit 40.
Is higher than the voltage of the rechargeable battery 46.

On the side of the AC power supply circuit 60, the transistor 61 is turned on / off by the AC signal generated from the AC generation circuit 10a when the main switch 80 is turned on, and the DC / AC conversion transistor 63 is turned on / off.
By turning off, the direct current from the pulsating flow smoothing capacitor 50 is converted into an alternating current. Here, since the power from the pulsating flow smoothing capacitor 50, which is higher than the voltage of the rechargeable battery 46, is converted into AC, the AC can be used to drive an electric device such as a radio or a lighting device.

As described above, in the second embodiment, the DC power supply circuit 70 having the rechargeable battery 71 for charging the power from the external generator is provided on the input side, and the intermittent switching circuit 30 is Are connected in parallel with each other, and a rechargeable battery 46 for charging the power discharged from the capacitor 33 and a smoothing capacitor 45 for smoothing the power discharged from the rechargeable battery 46 are provided on the output side of each intermittent switching circuit 30. And a transistor 4 for charging and discharging the smoothing capacitor 45.
3 and 44, and the output side of the charging / discharging circuit 40 is connected in series to each smoothing capacitor 45 of each charging / discharging circuit 40.
A pulsating flow smoothing capacitor 50 for smoothing the boosted power from the pulsating flow smoothing capacitor 50 is connected, and an AC power supply circuit 60 for converting DC from the pulsating flow smoothing capacitor 50 to AC is connected to the output side of the pulsating flow smoothing capacitor 50. Therefore, the voltage of the power output from the pulsating flow smoothing capacitor 50 can be easily increased. The pulsating flow smoothing capacitor 50
Because the AC power supply circuit 60 is provided on the output side of
Alternating current power can also be generated.

(Third Embodiment) FIG. 3 is a circuit diagram showing a charging device according to a third embodiment of the present invention.

In the third embodiment, the AC generation circuit 10 and the AC amplification circuit 20 described above are omitted, and charging and discharging are performed by the interlock switches 38a and 49 instead.

That is, the charging device shown in FIG. 3 includes a pulsating flow smoothing capacitor 3, a charge / discharge circuit 40, a pulsating flow smoothing capacitor 50, a DC power supply circuit 70, and a main switch 80.

The intermittent switching circuit 30 is connected to the DC power supply circuit 70 in parallel. Intermittent switching circuit 30
Are capacitors 33, backflow blocking diodes 34, 35,
37, and an interlock switch 38a. The interlock switch 38a is moved to the b side when charging the capacitor 33 with the power of the rechargeable battery 71 of the DC power supply circuit 70. When discharging the electric power charged in the capacitor 33, the interlock switch 38a is moved to the a side. By the operation of the interlock switch 38a, charging and discharging of the power in the capacitor 33 are repeated.

The intermittent switching circuit 30 includes a charge / discharge circuit 4 via a pulsating flow smoothing capacitor 3 and a backflow preventing diode 38.
0 is connected. The charging / discharging circuit 40 includes a smoothing capacitor 45, a rechargeable battery 46, backflow blocking diodes 47 and 48,
An interlock switch 49 is provided. The rechargeable battery 46 is charged with the power smoothed by the pulsating flow smoothing capacitor 3. Further, the power charged in the rechargeable battery 46 is smoothed by the pulsating flow smoothing capacitor 50 after being smoothed by the smoothing capacitor 45. The interlock switch 49 is moved to the b side when charging the power of the capacitor 33 to the rechargeable battery 46.
When discharging the electric power charged in the rechargeable battery 46, the interlock switch 49 is moved to the a side. Here, the pulsating flow smoothing capacitor 50 is connected to the smoothing capacitor 4 of each charge / discharge circuit 40.
5 are connected in series.

The DC power supply circuit 70 includes a rechargeable battery 71 and a smoothing capacitor 72. The rechargeable battery 71 can be charged with power from a solar cell, for example. Rechargeable battery 7
When the power charged to 1 is discharged, the power is smoothed by the smoothing capacitor 72. The main switch 80
Light 81 is connected.

Next, the operation of the charging device having such a configuration will be described.

First, when charging the capacitor 33 with the power of the rechargeable battery 71 of the DC power supply circuit 70, the interlock switch 38
a is moved to the b side. Thereby, the power of the rechargeable battery 71 is smoothed by the smoothing capacitor 72 and
3 is charged. On the other hand, when discharging the electric power charged in the capacitor 33, the interlock switch 38a is moved to the a side. Thus, the electric power of the capacitor 33 is charged by the rechargeable battery 46 after being smoothed by the pulsating flow smoothing capacitor 3.

By the operation of the interlock switch 38a, the charging and discharging of the power in the capacitor 33 are repeated. When charging the rechargeable battery 46 with the electric power of the capacitor 33, the interlock switch 49 is moved to the side b. When discharging the electric power charged in the rechargeable battery 46, the interlock switch 4
9 is moved to the a side. Such an interlock switch 49
By the operation described above, the charging and discharging of the electric power in the rechargeable battery 46 are repeated. At this time, the electric power charged in the rechargeable battery 46 has been boosted by the pulsating flow smoothing capacitor 3,
For example, it is 12V.

When using the electric power charged in the rechargeable battery 46, the main switch 80 is turned on. Further, the interlock switch 49 is moved to the a side in conjunction with the main switch 80.

As a result, the power charged in the rechargeable battery 46 is smoothed by the smoothing capacitor 45, smoothed by the pulsating flow smoothing capacitor 50, and output to the light 81. At this time, the power supplied to the pulsating flow smoothing capacitor 50 corresponds to the sum of the capacitance values of the smoothing capacitors 45 of the respective charge / discharge circuits 40.

As described above, in the third embodiment, the charge / discharge of the capacitor 33 and the smoothing capacitor 45 of each of the intermittent switching circuit 30 and the charge / discharge circuit 40 is controlled by the interlock switch 38a,
49, so that not only the AC generation circuit 10 and the elements associated with the AC generation circuit 10 described above can be omitted, but also the circuit configuration can be reduced even when a plurality of intermittent switching circuits 30 and charge / discharge circuits 40 are provided. Simplification can be achieved.

[0054]

As described above, in the charging apparatus according to the present invention, the applied DC power is supplied to the intermittent switching circuit (30).
Of the transistor (3) is charged by the AC signal from the AC generation circuit (10).
1, 32) are turned on / off to charge and discharge the capacitor (33), and the discharged power is smoothed and boosted by the smoothing capacitor (3) and output. Electric power can be charged directly to the built-in battery of electric equipment.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a first embodiment of a charging device of the present invention.

FIG. 2 is a circuit diagram showing a second embodiment of the charging device of the present invention.

FIG. 3 is a circuit diagram showing a third embodiment of the charging device of the present invention.

[Description of Signs] 1 input terminal 2 output terminal 2a switch 3 smoothing capacitor 10, 10a AC generation circuit 11, 12, 31, 32, 41, 43, 44, 61 transistor 11a, 12a capacitor 11b, 12b, 20a, 20b , 36, 39 resistor 14 stabilizing transformer 20 AC amplifying circuit 20A DC / AC converting transistor 20B branch transformer 21, 22 amplifying transistor 23 switch 30 intermittent switching circuit 33 capacitor 34, 35, 37, 38, 47, 48 reverse current blocking diode 38a , 49 Interlock switch 40 Charge / discharge circuit 42 Inverter transformer 45, 72 Smoothing capacitor 46, 71 Rechargeable battery 50 Capacitor for pulsating flow 60 AC power supply circuit 62 AC generation circuit 70 DC power supply circuit 80 Main switch 81 Light

Claims (3)

[Claims] An input terminal to which DC power is applied (1)
An intermittent switching circuit (3) having a capacitor (33) for charging the applied power and transistors (31, 32) for charging and discharging the capacitor (33).
0), and an AC generation circuit (10) for generating an AC signal for performing an on / off operation of the transistors (31, 32).
A smoothing capacitor (3) for smoothing and boosting the power discharged from the capacitor (33); and an output terminal (2) for outputting the power boosted by the smoothing capacitor (3). A charging device characterized by the above-mentioned. 2. A DC power supply circuit (70) having a rechargeable battery (71) for charging electric power from an external generator is provided on the input terminal (1) side, and the intermittent switching circuit (30) is provided.
A plurality of rechargeable batteries (46) are provided in parallel with the AC generation circuit (10), and charge the electric power discharged from the capacitor (33) at the output side of each of the intermittent switching circuits (30). ), A smoothing capacitor (45) for charging power discharged from the rechargeable battery (46), and transistors (43, 44) for charging and discharging the smoothing capacitor (45). ) Is connected, and the output side of the charging / discharging circuit (40) is connected in series to each smoothing capacitor (45) of each charging / discharging circuit (40), and the voltage from each smoothing capacitor (45) is increased. A pulsating flow smoothing capacitor (50) for smoothing electric power is connected, and an AC power supply for converting DC from the pulsating flow smoothing capacitor (50) to AC at an output side of the pulsating flow smoothing capacitor (50). Charging device according to claim 1, characterized in that the road (60) is connected. 3. A DC power supply circuit (70) having a rechargeable battery (71) for charging electric power from an external generator, and a plurality of DC power supply circuits are provided in parallel with the DC power supply circuit (70). An intermittent switching circuit (30) having a capacitor (33) for charging power from (71) and an interlocking switch (38) for charging and discharging the capacitor (33); A smoothing capacitor (3) for smoothing and boosting the discharged power, a rechargeable battery (46) for charging the power discharged from the capacitor (33), and a power discharged from the rechargeable battery (46) And an interlocking switch (4) for charging and discharging the smoothing capacitor (45).
9) is connected in series to each smoothing capacitor (45) of each charge / discharge circuit (40), and smoothes the boosted power from each smoothing capacitor (45). Pulsating flow smoothing capacitor (5
0).