JPS5843174A - Element defect detecting light emitting device - Google Patents

Abstract

PURPOSE:To reduce the size of an element defect detecting light emitting device by employing a light emitting element having less power loss for emitting a light to notify the defect of the element and mounting and molding all parts connected thereto on one printed board. CONSTITUTION:An element defect detecting circuit in which balancing resistors 5, 6 and voltage dividing resistors 7, 8 are connected in T shape and a condenser 9 and a light emitting element 18 are connected parallel to a resistor 7, is connected to a thyristor stack circuit which has thyristors 3, 4. The stack circuit and the element defect detecting circuit are mounted on a printed board, and the entirety is molded with synthetic resin, thereby forming an element defect detecting light emitting device. Accordingly, a light emitting element 18 employs a semiconductor having low power loss, thereby reducing the size of the resistors 5, 6. Further, the parts are molded, thereby improving the insulating performance and largely reducing the size of the entire device.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an element failure detection optical transmitter, and more particularly to an element failure detection optical transmitter suitable for use in a thyristor stack plate.

The element failure detection optical transmitter immediately detects failure of a thyristor in a circuit consisting of two or more thyristors, and a typical circuit example is shown in FIG. The circuit of a conventional element failure detection optical transmitter includes a thyristor stack circuit 1 and an element failure detection circuit 2. Thyristor stack circuit 1 includes thyristor 3
and 4 are included, and the element failure detection circuit 2 includes balance resistors 5 and 6 and voltage dividing resistors 7 and 8 connected in a T-shape,
It consists of a voltage dividing resistor 8, a protective capacitor 9 and a neon lamp 10 connected in parallel.

In the circuit of the conventional element failure detection optical transmitter as described above, the size of the neon lamp 10 is large and the power loss is large, so one balance resistor 5. .

6 becomes large, and the shape of this balance resistor 5° 6 also becomes large. For this reason, Neo.

Since the balance resistor 5.6 and the balance resistor 5.6 cannot be incorporated into a small printed circuit board, there is a drawback that the entire installation device is large and sluggish. Unable to live together, element failure detection circuit 2
This had the disadvantage that the thyristor 3.4 had to be installed elsewhere, and the wiring from the thyristor 3.4 had to be routed. For this reason, the neo/lamp 1O and the thyristor 3.4 are not installed at the same location, which makes maintenance and inspection extremely complicated, resulting in a reduction in work efficiency.

FIG. 2 is a diagram showing the arrangement relationship between the element failure detector board having the element failure detection circuit 2 and the thyristor board having the thyristor stack circuit 1. As shown in FIG.

Element failure detector panel 11 and thyristor panel 12, 13゜14
．． 15 is removably attached to box 16. Wiring 17 from the element failure detector panel 11 is connected to thyristor panels 12, 13, 14, and 15.

Therefore, during maintenance and inspection, the thyristor panel 12, 13° 14.1
When removing 5, connect the wiring 17 from the element failure detector panel 11.
After removing the bundle of thyristor boards 12, 13, 14,
15 has to be removed and workability is poor.'7tn
9 Also, the above-mentioned 1 sea urchin neon lamp 10. Since the element failure detector panel 11 including the balance resistors 5 + 6 is large in size, the box 16 has a disadvantage of large dimensions.

SUMMARY OF THE INVENTION An object of the present invention is to eliminate the above-mentioned drawbacks, and to provide a small-sized reciprocal failure detection optical transmitter that eliminates the need for wiring to a thyristor panel, facilitates maintenance and inspection work.

The present invention utilizes a light emitting element with low power loss to notify the failure of the element. By making the 4-lance resistor smaller and attaching and molding these parts to a single printed board, The equipment has been made smaller by improving its insulation performance with other parts.

Hereinafter, one embodiment of the element failure detection optical transmitter of the present invention will be described with reference to the drawings, in which the same parts as in the conventional example are denoted by the same reference numerals.

FIG. 3 shows the circuit of the element failure detection optical transmitter of this embodiment. In a thyristor stack circuit including thyristors 3 and 4, balance resistors 5) and 6 and voltage dividing resistors 7 and 8 are connected in a T-shape. are connected in parallel.When connecting these two circuits, the voltage dividing resistors 19 and 19, the voltage dividing resistor 20, and the voltage dividing resistor 20 constituting the thyristor stack circuit are connected.
In this embodiment, unlike the conventional example, the thyristor stack circuit and the element failure detection circuit are integrated.

Fig. 4 and Fig. 5 show the external shape of the p-element failure detection light rabbit signal system +R2'1 of this embodiment in which the thyristor stack circuit and the element failure detection circuit shown in Fig. 3 are formed on one printed board. It is something. A thyristor 4, a balance resistor 5゜6, a voltage dividing resistor 7.8 and a protection' are mounted on one printed board 22.
≧The convex metal part of the circuit shown in FIG. 3, such as the capacitor 1, is attached, and the terminal 23 is protruded from the end of the printed board 22. The element failure detection optical transmitter 211 shown in FIG. 1. Since the front failure detection optical transmitter of this embodiment uses a small light emitting element 18 with low power loss, the balance resistor 5.6 is small. Since the thyristor stack circuit and the element failure detection circuit are integrally formed on one printed board 22 and are molded, the external shape of the element failure detection optical transmitter is very small. It is small in size.

8 and 9 show a structure in which the light emitting element 18 attached to the above-mentioned element failure detection optical transmitter 21 is attached so as to protrude obliquely.

With this structure, as shown in FIG. 10, the thyristor stack can be stacked without touching the terminals of the resistor 25 and snubber capacitor 26, which are mounted in high density on the thyristor stack board 24. Light emitting element 1 of the element failure detection optical transmitter 21 mounted on the panel 24
8, an optical fiber 27 can be easily connected.

11 and 12 show the mounting leg portion 28 of the element failure detection optical transmitter 121 shown in FIGS. 6 and 7.
As shown in the figure, it has a structure that protrudes from the oblique opening.

Even with this structure, as shown in FIG. 13, the entire mounting leg 28 is fixed to a horizontal mounting base provided on the thyristor stack board 24, so that the entire structure is slightly tilted. can be easily connected.

14 and 15 show the element failure detection light transmitting device shown in FIGS. 6 and 7 provided with a mounting leg 2B projecting perpendicularly to the surface opposite to the light emitting element 18. With this structure, as shown in FIG.
Since the element failure detection optical transmitter z1 is attached to the object, the optical fiber 27 can be easily connected to the light emitting element 18.

According to this embodiment, the element failure detection circuit can be operated with low power loss.
By constructing a small light emitting element □needle'''8 and making the clamp resistance 5.6 small, it constitutes components such as the thyristor 3.4 that constitute the thyristor stack circuit and an element failure detection circuit. Light emitting element 18 and balance resistor 5.6
etc. are integrally attached to one printed board 22, and this printed board 22 is molded with resin, which has the effect of making the element failure detection optical transmitter compact, and this element failure detection optical transmitter can be directly connected. Thyristor stack board 24
This has the effect of making it possible to install the

This eliminates the need for wiring, which has the effect of facilitating maintenance and inspection work.

As described above, the element failure detection optical transmitter of the present invention has the advantage that wiring with the thyristor board can be omitted, maintenance and inspection work is easy, and the device can be made compact.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing the circuit of a conventional element failure detection optical transmitter, and Fig. 2 is an explanation showing the arrangement relationship between a conventional element failure detector board and a thyristor metal failure board.
::TI: Figure 3 is a circuit diagram showing an embodiment of the element failure detection optical transmitter of the present invention, and Figure 4 is a circuit diagram showing an embodiment of the element failure detection optical transmitter of the present invention formed on a printed board. 5 is a side view of FIG. 4, and a front view showing the external shape of the element failure detection optical transmitter of this embodiment completed by molding No. 6.
Fig. 7 is a side view of Fig. 6, Fig. 8 is a front view showing an example of an element failure detection optical transmitter having a structure in which a light emitting element is arranged to protrude from the mold part, and Fig. 9 is a side view of Fig. 8. Fig. 10 is an explanatory diagram showing the state in which the element failure detection optical transmitter shown in Figs. 8 and 9 is attached to a thyristor stack board, and Fig. 11 is a structure in which the mounting leg is provided as a subject. 12 is a front view showing an example of an element failure detection optical transmitter having
The figure is a side view of Fig. 11, and Fig. 13 is a side view of Fig. 11 and 12.
An explanatory diagram showing the state in which the element failure detection optical transmitter shown in the figure is attached to a thyristor stack board. Figure 14 is an example of an element failure detection optical transmitter in which the mounting leg is provided at right angles on the side opposite to the light emitting element. 15 is a side view of FIG. 14, and FIG. 16 is an explanatory diagram showing the state in which the element failure detection optical transmitter shown in FIGS. 14 and 15 is installed on a single lister stack board. It is. DESCRIPTION OF SYMBOLS 1... Thyristor stack circuit, 2... Element failure detection circuit, 3.4... Thyristor, 5, 6... Balance resistor, 9... Protection capacitor, 18... Light emitting element, 21... ...Element failure detection optical transmitter, 2°2...Printed board, Fig. 4 Tomi S Fig. 6 Fig. q

Claims (1)

[Claims] 1. When a thyristor in a circuit that includes two or more thyristors fails, the failure is immediately detected.It detects the failure of a thyristor immediately, and detects the failure of an element consisting of a light-emitting component, a balance resistor for failure detection, a protective capacitor, etc. connected to this light-emitting component. In the detection light transmitting device, a semiconductor light emitting element with low power loss is used as the light emitting component, and a small balance resistor with a small capacity is used.After the components are mounted on a single printed board, An element failure detection light transmitting device characterized by being molded with synthetic resin.