JP3266810B2 - Multi-stage voltage doubler rectifier circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multistage voltage doubler rectifier circuit, and more particularly to a multistage voltage doubler rectifier circuit built in an image intensifier tube or a gun for electrostatic coating.

[0002]

2. Description of the Related Art A DC high voltage generator of about 10 kV to 30 kV used for an image intensifier tube has a high voltage but almost no current. 60kV for electrostatic painting
DC high voltage generators of ~ 80 kV have high voltage but current of several tens of microamps, and consume little energy. For this reason, the circuit configuration is designed so that high frequencies of 20 kHz to 100 kHz are rectified by a multistage voltage doubler rectifier circuit to reduce the size and weight. High-voltage components are compact and lightweight by being molded with a synthetic resin insulating material. With such a configuration, it is possible to reduce the size and weight so as to be directly attached to the target device.

For example, in Japanese Utility Model Publication No. 50-22059,
As a coating gun for electrostatic coating, there is disclosed a device in which a multi-stage voltage doubler rectifier is incorporated, a high frequency voltage is supplied to the rectifier, and the high voltage output is connected to a charging electrode. Also, 1968
A similar invention is also shown in French Patent Publication No. 1,542,090 issued year. The original application is 1
Filed in Germany in 966 with L54968. Furthermore, Japanese Utility Model Publication No. 59-36282 proposes a device in which a multistage voltage doubler rectifier and a conversion circuit for generating a high voltage of a medium to high voltage are built in a coating gun, and a DC low voltage is supplied to the device. . However, none of them has proposed or disclosed the insulation configuration of the high-voltage section in detail.

In general, the requirements for the insulation configuration of a DC high-voltage generator include: first, when molding with a synthetic resin material, the thickness of an insulation layer required for the surrounding zero potential point must be maintained; 2 of keeping the insulation creepage distance between each part
It is necessary to meet one. However, in the case of a multistage voltage doubler rectifier built in a target device, the first requirement is that a necessary insulating layer can be secured on the device side.
The only condition is to keep the insulation creepage distance, which is the requirement of Even if the first requirement is insulated on the device side, reducing the total volume and outer circumference of the multistage voltage doubler rectifier itself is effective in reducing the required amount of insulating material of the entire device. is there.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a multi-stage voltage doubler rectifier circuit having a structure that minimizes the total volume and outer circumference while ensuring a necessary separation distance between components.

[0006]

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention relates to a multi-stage voltage doubler rectifier circuit which receives a high frequency high voltage and generates a DC high voltage, and comprises n (n)
Is a natural number) capacitor and n
In a multi-stage voltage doubler rectifier circuit comprising a smoothing column composed of a plurality of capacitors and 2n rectifier diodes connected in series to each other in the same direction, each of the capacitors of the push-up column and the smoothing column is arranged in a row in the direction of increasing the number of stages. The rectifier diode is disposed so as to be located between the capacitors of the push-up column and the smoothing column, and the lead wires of the capacitors of the push-up column and the smoothing column are connected to each other. It is extended to the outside opposite to the column,
The connection between the lead wires of the capacitors of the respective columns and the rectifier diodes provides a multi-stage voltage doubler rectifier circuit performed outside the respective capacitors of the opposing columns.

[0007]

FIG. 1 shows an output 60k according to an embodiment of the present invention.
Fig. 3 shows a circuit diagram of a multistage voltage doubler rectifier circuit of V. When a high frequency of about 3 kHz at about 50 kHz is received from input terminals 41 and 42,
A zero-stage multi-stage voltage doubler rectifier circuit 4 generates a DC high voltage of DC-60 kV at a high voltage output terminal 43.

The components of the multi-stage voltage doubler rectifier circuit 4 include a smoothing column including capacitors C1, C2,..., C10, a push-up column including capacitors K1, K2,.
D1, D2 ..., D20. Each of the capacitors is a small disk-shaped ceramic capacitor, and each lead wire is drawn out in one direction to both surfaces of each disk.

FIG. 2 is a layout diagram of the multi-stage voltage doubler rectifier circuit according to the present invention, and shows up to almost the second stage near the input terminals 41 and 42. (A) shows the view from above, (b) the view from the input terminals 41 and 42, (c)
, K10, K2,..., K10 of the push-up column are shown from the side.

As shown in FIG. 2A, capacitors C1, C2,... Of the smoothing columns and capacitors K1, K
Are arranged to face each other in parallel with a width of x. At this time, the leads of any of the capacitors C1, C2 ... K1, K2 ... are drawn out to the outside of the opposed width x. At the point P, the input terminal 41 of the capacitor C1 is connected to the cathode of the diode D1. At point R, one end of the capacitor C1, the anode of the diode D2, and the cathode of the diode D3 are connected. (See also FIGS. 2 (b) and (c) for diode D2.)

The same applies to the push-up column.
One end of the capacitor K1 is connected to the input terminal 42, and the other end is connected at point Q to the anode of the diode D1, the cathode of the diode D2, and one end of the capacitor K2. At the point S, one end of the capacitor K2 is connected to the anode of the diode D3 and the cathode of the diode D4.

In the multi-stage voltage doubler rectifier circuit 4 configured as described above, the leads of each capacitor are connected to the capacitors C1, C2,.
K1, K2 ... are all drawn out toward the outside of the opposite width x, and electrical connection is made only at the outside locations P, Q, R, S, etc. The insulation conditions are automatically satisfied without any special action.

Although the necessary conditions for the electrical connection have been described above, the physical arrangement is such that the width y of the opposing diodes D1 and D2 is reduced as shown in the side view of FIG. In addition, the size y can be reduced by shifting or skewing the parts.

When the mutual distance between the push-up column and the smooth column is ensured, the equivalent mutual capacitance is reduced to some extent. This mutual capacitance has an effect of suppressing the boosting efficiency of the multi-stage voltage doubler rectifier circuit, and it is desirable that the mutual capacitance be as small as possible. However, in the multi-stage voltage doubler rectifier circuit according to the present invention, it is effective to suppress the value. is there.

In the above-described manufacturing process, the soldering of the electric components is made round so as not to have sharp edges. In any process, it is necessary to take care that no oil, grease, dust, moisture, etc. adhere to the parts of the parts, and to perform a cleaning process and a drying process immediately before insulating the resin mold. In these steps, in the structure of the present invention, since the connection portion is located outside, accurate work can be easily performed.

[0016]

The present invention has the features as described above, and each connection part of the multi-stage voltage doubler rectifier is outside the structural body, and the condition of mutual insulation is naturally satisfied for the most part. It is economical because no special insulating support member is required. And it has a self-holding force enough to be self-supporting until a scheduled subsequent resin molding process. Further, since the connection portion is located on the outside, the total volume and outer circumference can be minimized, and the required amount of insulator can be minimized. Therefore, a small and lightweight high-voltage generator can be manufactured economically and reliably.

[Brief description of the drawings]

FIG. 1 shows a circuit diagram of an embodiment of a -60 kV output multi-stage voltage doubler rectifier circuit according to the present invention.

FIG. 2 is a layout diagram of an embodiment of a multi-stage voltage doubler rectifier circuit according to the present invention.

[Explanation of symbols]

4: Multi-stage voltage doubler rectifier circuit 41, 42 ... Input terminal 43 ...
High voltage output terminals C1, C2, ..., C10 ... Smoothing columns K1, K2, ..., K10 ... Push-up columns

──────────────────────────────────────────────────続 き Continued on the front page (56) References JP-A 1-115783 (JP, U) JP-A 1-1120792 (JP, U) JP-A 63-4163 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H02M 7/10

Claims (1)

(57) [Claims] 1. A multi-stage voltage doubler rectifier circuit for generating a DC high voltage by receiving a high frequency high voltage, comprising: a push-up column including n (n is a natural number) capacitors; and a smoothing column including n capacitors. A multi-stage voltage doubler rectifier circuit composed of 2n rectifier diodes connected in series in the same direction, wherein the capacitors of the push-up column and the smoothing column are arranged in a row facing each other in a direction of increasing the number of stages; The rectifier diode is disposed so as to be located between the capacitors of the push-up column and the smoothing column, and the lead wires of the capacitors of the push-up column and the smoothing column are opposite to each other. The connection between the lead wire of the capacitor of each column and the rectifier diode extends outward. The multi-stage voltage doubler rectifier circuit is performed outside each capacitor of the corresponding column.