JPH0332362A - High voltage generation circuit - Google Patents

Abstract

PURPOSE:To eliminate a cross preventive spacer by wiring a secondary winding and rectifiers on the same printed board. CONSTITUTION:A high voltage generation circuit consists of a primary winding 1, core 6 and rectifier bridges 12. Insulating plates 10 and printed boards 9 are alternately piled up on the primary winding 1 to cover it with a plurality of the set of them, a secondary winding is wired on the said printed boards 9, and the above mentioned rectifier bridges 12 are provided on the same plates to form rectifier units. A plurality of the sheet of the printed boards 9 are connected to each other in series with a lead wire 11 to constitute a circuit.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a high voltage generation circuit that rectifies the output voltage of a transformer to obtain a high DC voltage.

[Prior Art] A high voltage generating circuit operated at high frequency is shown in Figs. 6 and 7. In the figure, 6 is a core of a transformer, and a primary winding 1 is wound around this core 6. The primary winding 1 is covered with a bobbin 7 having a divided winding part, and the secondary winding is divided into 2 to 5 parts and wound on the divided winding part.

Further, each of the divided secondary windings 2 to 5 is connected to a rectifier 8. The rectifier 8 is a circuit in which rectifiers equal to the number of secondary winding divisions are connected in series, and rectifies each secondary voltage, connects them in series, and outputs them.

By dividing the secondary windings 2 to 5 into divided windings, the transformer's stray capacitance C1 can be reduced.
- Reactive power due to C8 can be reduced.

The capacitance of each secondary winding 2 to 5 is C5 to C8 (sum of interlayer capacitance CE), and the capacitance between primary winding 1 and secondary winding 2 to 5 is 01.
-C4, the potential distribution of each secondary winding 2-5 during operation is shown in FIG.

In this way, by dividing the secondary winding into divided windings, the AC voltage applied to the capacitors 05 to C8 is reduced to a fraction of the number of winding divisions.
Since the reactive power (1/2CV''·r) is proportional to the square of the voltage, it is reduced to 1/2 of the number of winding divisions.

In addition, the AC voltage marked 7J[I on the capacitor Cl-C4 is
By connecting 8G rectifiers with the same number of stages as the number of divisions, the potential does not fluctuate as much as when rectifying with a single rectifier (not shown in Figure 9), so the reactive power (1/2C 2.
f) is reduced in proportion to the square of the number of stages.

Since the reactive power is proportional to the operating frequency IN, the high voltage output I11 path uses a high frequency inverter μ.

It is suitable for a 1ijl path in which the transformer has a high frequency.

[Invention or problem to be solved]

However, as shown in Figure 7, the secondary line 2 to 5
Twice the number of lead wires are connected, and since they are high voltage wires, spacers are installed to prevent crosstalk, and high voltage insulating tubes 1 to 18 are connected to the lead wires. Since it is necessary to inflate the wiring spacer, there are problems in that the wiring spacer becomes large, the device becomes large, and the number of connections increases.

The object of the present invention is to solve the disadvantages of the conventional example, and to provide a small number of units + 4 units.
IN! ! The present invention aims to provide a high pressure generation circuit that generates almost no effect (E-force) and can be manufactured at low cost with a small number of T.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a high voltage generation circuit that rectifies the output voltage of a transformer to produce 1fj current [-[].The secondary winding of the lance and the rectifier are made on the same printed board. The main idea is to connect multiple rectifier units in series.

[Effect]

According to Fujutsu 191, the secondary winding and rectifier are connected on the printed board, so the spacer for cross-connection of the lead wires can be omitted, and the insulation of the lead wires can be done by connecting the print I/temporary board part. Since it is insulated with an insulating plate, the insulating tube for the lead wire can also be omitted.

Furthermore, since the plate for series connection to the rectifier cornice 1 and the plate 1 serves as a spacer, the distance required for insulation can be easily managed.

Furthermore, since there is no interlayer space between the secondary windings and only DC voltage is applied in the width direction of the batten, the dynamic force is actually reduced compared to conventional windings.

[Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing one embodiment of the high voltage generation circuit of the present invention, and FIG. 2 is an explanatory diagram of the top of 11iJ.
1 is the primary winding wound around 1.

This primary winding 1 is provided with an insulating plate 10 and a printed board 9 stacked on top of each other so as to be used for multiple purposes.

If this printed board 9 is not shown in FIGS. 4 and 5, a spiral pattern 13 is wired as the transformer secondary winding, and the same
A rectifier baffle 12 was provided on the plate to provide a rectifier 5 times. In the figure, 14 indicates a through hole.

Furthermore, a plurality of Japanese tiles of the printed board 9 were connected in series using beams 1 and wires 11 to form a circuit not shown in FIG.

FIG. 3 shows the potential distribution between the printed board 9. By configuring the present invention in this way, the interlayer capacitance of the secondary winding of the conventional transformer is eliminated, and the potential distribution between the printed board 9 and the printed board 9 is reduced. Only DC voltage is applied.

In addition, the capacitance between the primary winding 1 and the secondary winding is as thin as the thickness of the pattern 13, which is several tens of μm thick, compared to conventional windings (for example, i, P
Since the capacity is reduced to several tenths compared to E Wo, 5, etc.), reactive power caused by SR and ray capantance G can be generated significantly.

(Effects of the Invention) As described above, in the high pressure generation circuit of the present invention, since the secondary winding and the rectifier are connected on the printed board, the spacer for the lead wire crosstalk 11Jj, t[: is omitted. can.

Furthermore, since the lead wires are insulated between the substrate portion of the printed L-board and the insulating plate, an insulating tube for the lead wires can also be omitted. Furthermore, REET 1 for connecting rectifier units in series
1) Since the plate acts as a spacer and the distance required for insulation can be easily managed, the wiring spanner of the conventional circuit is no longer necessary, and the high voltage part can be made smaller.

On the other hand, since almost no reactive power is generated due to stray capacitance, the capacity of the high-frequency inverter on the input side can be reduced, and the low-voltage section can also be made smaller.

In addition, since it is only necessary to overlap the pudding board and the insulating board, the number of assembly Ts is reduced and it can be manufactured at low cost.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing one embodiment of the high voltage generation circuit of the present invention, Fig. 2 is an explanatory diagram of the same, Fig. 3 is a potential distribution diagram between printed boards, and Fig. 4 is used in the present invention. 5 is a cross-sectional view taken along the line A-A in FIG. 4, FIG. 6 is a circuit diagram showing a high voltage generation circuit, FIG. 7 is a longitudinal sectional view showing a conventional example, and FIG. The figure is a potential distribution diagram of the secondary winding of the transformer in Figure 5.
FIG. 9 is a potential distribution diagram when one rectifier is used. 1...Primary winding 2-5...Secondary winding 6.
... Core 7 ... Bobbin 8 ... Rectifier 9 ... Temporary print 10 ... Insulation board
11... Lead wire 12... Rectifier bridge

Claims (1)

[Claims] In a high voltage generation circuit that rectifies the output voltage of a transformer to obtain DC voltage, the secondary winding of the transformer and the rectifier bridge are wired on the same printed board to form a rectifier unit, and multiple rectifier units are connected in series. A high voltage generation circuit featuring: