JP2520839B2 - Power supply for static eliminator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a static eliminator power supply device for applying a high DC voltage to a discharge electrode of a static eliminator.

[0002]

2. Description of the Related Art As described in Japanese Examined Patent Publication No. 3-1798, the present applicant has already proposed a power supply device for AC neutralization using a high frequency transformer capable of taking out a sufficiently high voltage even if it is small. providing. This power supply device uses a commercial AC power supply as an original power supply, a rectifier circuit that rectifies the AC voltage, a high-frequency oscillation circuit that is driven by the DC output of the rectification circuit to self-oscillate, and a high-frequency output that boosts the high-frequency output. It consists of a transformer.

[0003]

However, according to this, the static eliminator is used only in places where there are wiring facilities for a commercial AC power source, and it lacks mobility and portability. Although it can be made slightly smaller than the one using a transformer, it is still an AC application type, so there is naturally a limit to the size reduction, and it cannot be applied to a DC static eliminator that is particularly small and simple. .

Therefore, a first object of the present invention is to use a solar cell as a power source, and to use it as a power source device for a DC static eliminator, and to receive light even if there is no commercial AC power source wiring facility. For example, the location of the static eliminator can be used widely without being restricted, and it can be incorporated into the static eliminator and integrated with it in a small size. Another object of the present invention is to provide a static eliminator power supply device capable of supplying sufficient power for static erasing with a small-capacity solar cell.

A second object of the present invention is to enable positive and negative ions to be generated in the discharge electrode of the static eliminator in the same manner, and due to the ionic polarity balance, both positive and negative charges are generated. It is to enable efficient static elimination.

[0006]

In order to achieve the first object, a power supply device for a static eliminator according to the present invention includes a solar battery, a storage battery charged by the solar battery, and a voltage applied by the storage battery. An intermittent oscillation circuit that intermittently oscillates, and a transformer that generates an AC high voltage on the secondary side by the oscillation,
The AC high voltage is rectified and applied as a DC high voltage to the discharge electrode.

In order to achieve the second object, the rectifier circuit comprises a positive voltage doubler voltage rectifier circuit and a negative voltage doubler voltage rectifier circuit for applying positive and negative DC high voltages to the positive and negative discharge electrodes, respectively. The positive-side voltage doubler rectifier circuit converts the secondary side AC voltage of the transformer to n.
In order to positively rectify and amplify in stages, a diode and a capacitor are connected in series in n stages, and the negative side voltage doubler rectifier circuit reduces the secondary side AC voltage of the transformer by less than m.
It is configured by connecting m stages of diodes and capacitors in series to perform negative rectification and amplification in stages.

[0008]

In the power supply device according to the present invention, the solar battery is used as a power source, the electric charge generated by the solar battery is stored in the storage battery, and the oscillation circuit is intermittently oscillated by the voltage to convert the direct current into the alternating current.
The AC voltage is boosted by a transformer, further rectified to be DC again, and then applied to the discharge electrode.

By the way, since sunlight has a high illuminance, sufficient power generation can be obtained for the solar cell. However, considering that the static eliminator is used indoors, its illuminance is incandescent lamp or fluorescent lamp. Low. For example, when the light source is an ordinary fluorescent lamp, even if the illuminance in its vicinity is about 5000 Lx,
Only about 500Lx of illuminance can be obtained on the desk. A large solar cell is generally required to obtain the power required for static elimination with this level of illuminance. In addition, when the oscillation circuit is oscillated by the DC voltage of the storage battery and converted into AC, if the oscillation circuit is continuously oscillated, the power consumption due to the oscillation increases, and the solar cell that is the power source also depends on the magnitude of the power consumption. It has to be a big one.

However, according to the present invention, in order to improve the boosting efficiency of the transformer, in addition to converting the direct current into the alternating current by the oscillating circuit, the oscillating circuit oscillates intermittently, so that the power consumption due to the oscillation can be small. Therefore, even if an incandescent lamp or a fluorescent lamp is used as a light source indoors, it is possible to supply the power required for static elimination with a small solar cell.

The ions generated by the ionization by the plus and minus discharge electrodes of the static eliminator tend to be slightly more negative ions than positive ions, but positive and negative voltage doubler rectifier circuits are used as rectifier circuits. ,
If the number of amplification stages on the positive side in these voltage doubler rectifier circuits is greater than the number on the negative side, the high DC voltage applied to the positive and negative discharge electrodes will be higher on the positive side, and positive and negative ions will be generated equally. Will be able to.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. As shown in FIG. 1, this power supply device includes a solar cell 1, a storage battery 2 such as a lead battery or a Ni-Cd battery, a high-frequency intermittent oscillation circuit 3, a high-frequency transformer 4, a positive-side voltage doubler rectifier circuit 5, and a negative-side voltage doubler rectifier. And the circuit 6.

When the solar cell 1 receives light to generate power, the electric charge is stored in the storage battery 2 via the diode 7, and the stored voltage is applied to the high frequency intermittent oscillation circuit 3.
The high frequency intermittent oscillation circuit 3 is connected to the primary side of the high frequency transformer 4, and when the starting transistor 8 is turned on by the application of the DC voltage from the storage battery 2, the high frequency intermittent oscillation circuit 3 intermittently oscillates the high frequency. That is, the resistance R is increased (to reduce the base current of the transistor 10) for intermittent oscillation, and oscillation occurs when the amount of charge stored in the capacitor C1 is charged, and oscillation stops when the charged charge is discharged. . By repeating this, intermittent oscillation occurs. When the intermittent oscillation is performed in this manner, a high AC voltage is intermittently obtained on the secondary side of the high frequency transformer 4.

A positive side voltage doubler rectifier circuit 5 and a negative side voltage doubler rectifier circuit 6 are connected in parallel to the secondary side output terminal of the high frequency transformer 4. The structure and principle of a voltage doubler rectifier circuit are known, and by connecting a diode D and a capacitor C so as to be stacked in series, a high voltage DC voltage that is a multiple of the secondary voltage of the transformer can be obtained by the number of stacked stages. Also known as the Cockcroft-Walton circuit.

The positive-side voltage doubler rectifier circuit 5 has a diode D and a capacitor C connected in series in n stages (5 in the figure) to positively rectify and amplify the secondary voltage of the high frequency transformer 4 in n stages.
The negative-side voltage doubler rectifier circuit 6 has a diode D of the positive-side voltage doubler rectifier circuit 5 for negatively rectifying and amplifying the secondary voltage of the high-frequency transformer 4 into m stages less than n. It is configured by connecting a diode D and a capacitor C, which are in the opposite direction to, in series in m stages (4 stages in the figure).

The output terminal of the positive-side voltage doubler rectifier circuit 5 is resistance-coupled to the positive-side discharge electrode 9 of the static eliminator, so that the resistance 1
1 is connected to the electrode holder 12 on the positive side, and the output terminal of the voltage doubler rectifier circuit 6 on the negative side is resistance-coupled to the negative discharge electrode 10 of the static eliminator.
It is connected to the negative electrode holder 12 via 1.

In such a configuration, electric power is stored in the storage battery 2 by the power generation by the solar cell 1, and the high frequency intermittent oscillation circuit 3 intermittently oscillates at the voltage to generate a high frequency output as shown in FIG. 2, for example. Then, this is boosted by the high frequency transformer 4 as shown in FIG. The output of the high frequency transformer 4 is n
At the same time as being positively rectified and amplified by the stages, the negative side voltage doubler rectification circuit 6 performs negative rectification and amplification by m stages. In this case, since the positive side voltage doubler rectifier circuit 5 has more stages than the negative side voltage doubler rectifier circuit 6, the voltage applied to the positive side discharge electrode 9 is the voltage applied to the negative side discharge electrode 10. It will be higher than that and ion balance can be achieved. Further, even if the high frequency intermittent oscillation circuit 3 intermittently oscillates, the output of the plus / minus voltage doubler rectifier circuits 5 and 6 is a voltage sufficient to eliminate the charge even at the intermediate point A of the oscillation interruption section, and therefore the charge is removed. There is no problem.

[0018]

The power supply unit for static eliminator according to the present invention has the following effects. Since it uses a solar cell as a power source, it can be used as a power supply device for a DC static eliminator easily, and can be used extensively without limiting the location of the static eliminator, as long as it receives light without the need for a commercial AC power supply wiring facility It can be incorporated into the static eliminator and can be integrated with it in a small size.

The electric charge generated by the solar cell is stored in a storage battery, the intermittent oscillation circuit is intermittently oscillated by the voltage to convert direct current into alternating current, and then the alternating voltage is boosted by a transformer and further rectified. Since DC is applied again to the discharge electrode, in order to increase the boosting efficiency of the transformer, in addition to converting DC to AC by the oscillator circuit, the oscillator circuit oscillates intermittently, so the power consumption due to the oscillation is small. I'm done. Therefore, even if an incandescent lamp or a fluorescent lamp is used as a light source indoors, it is possible to supply the power required for static elimination with a small solar cell.

According to the second aspect, in addition to the above, the following effect is further provided. Since the AC voltage on the secondary side of the transformer is rectified and amplified by a voltage doubler rectifier circuit consisting of a diode and a capacitor and applied to the positive and negative discharge electrodes, it is discharged even if a small high-frequency transformer with a small transformation capacity is used. A sufficiently high voltage can be applied to the electrodes, and the size can be further reduced.

Since the number of amplification stages of the voltage doubler rectifier circuit on the plus side is larger than that on the minus side so that the DC voltage applied to the discharge electrode on the plus side is higher than that on the minus side, Negative ions can be generated equivalently. Therefore, it is possible to prevent the reverse charging of the charged object, and it is possible to efficiently remove the charge regardless of the polarity or the potential of the charged object due to the ionic polarity balance.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of an example of a power supply device for a static eliminator according to the present invention.

FIG. 2 is a diagram showing output waveforms of some circuits in the above.

[Explanation of symbols]

 1 Solar battery 2 Storage battery 3 High frequency intermittent oscillation circuit 4 High frequency transformer 5 Positive voltage doubler voltage rectifier circuit 6 Negative voltage multiplier voltage rectifier circuit 9/10 Discharge electrode D Diode C capacitor

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kuniyoshi Ogawa 8-20-15-1003, Hino, Konan-ku, Yokohama-shi, Kanagawa Prefecture (56) Reference JP-A-5-299191 (JP, A) JP-A-51-107435 (JP, A)

Claims (2)

(57) [Claims] 1. A solar cell, a storage battery charged by the solar cell, an intermittent oscillation circuit that intermittently oscillates by applying a voltage from the storage battery, and a transformer that generates an AC high voltage on the secondary side by the oscillation. And a rectifying circuit for rectifying the AC high voltage and applying it to the discharge electrode as a DC high voltage. 2. The rectifier circuit comprises a positive voltage doubler voltage rectifier circuit and a negative voltage doubler voltage rectifier circuit for applying positive and negative DC high voltages to the positive and negative discharge electrodes, respectively. The rectifier circuit is configured by connecting a diode and a capacitor in n stages in series to positively rectify and amplify the secondary side AC voltage of the transformer in n stages, and the negative side voltage doubler rectifier circuit is a secondary side of the transformer. 2. The static eliminator power supply device according to claim 1, wherein a diode and a capacitor are connected in series in m stages to amplify and rectify the side AC voltage by m stages less than n.