JPH0658782B2 - Saturated reactor for thermal relay - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a saturation reactor for a thermal relay.

[Conventional technology]

Like a motor that starts with a large inertial load,
For motors that take a long time to start, standard thermal relays may not provide adequate protection because they are created at start-up.

In such a case, connect a saturation reactor to each heater of the standard thermal relay in parallel,
The operating characteristics in the current range up to about 200% of the settling current are hardly changed.In the current range exceeding that, the saturated reactor core is saturated to increase the shunt current to the reactor and limit the current to the heater. The operation time limit is long.

Fig. 4 shows a conventional saturated reactor used for such a purpose. In the figure, (1) is a coil, (2) is an iron core linked to the coil (1), and (3) is a screw and a nut. An iron core clamp for tightening the iron core (2), (4) a terminal, and (5) a lead wire.

This saturation reactor (A) is screwed to the terminal of the thermal relay (B) using the terminal (4) as shown in Fig. 5, and the lead wire (5) is connected as shown in the figure (thermal Used in parallel with each heater of the relay).

[Problems to be solved by the invention]

By the way, in the case of the conventional reactor, as described above, the terminal (4) had to be directly attached to the terminal of the thermal relay (B) at the time of installation, so the weight of the reactor would be directly applied to the thermal relay (B). Therefore, the mechanical strength of the terminal mounting portion has been a problem.

Also, when the reactor is attached to the thermal relay (B),
Since the reactor travels sideways from the thermal relay (B) irregularly, the mounting density of the control panel has deteriorated.

Furthermore, since the charging section is exposed, a space is required to secure an insulation distance from other electric devices (and thus the mounting density of the control panel is deteriorated). There was also a problem from the viewpoint of safety against electric shock.

The present invention has been made to solve the above-mentioned problems, and it is possible to mount a reactor on a base surface of a control panel or the like without directly mounting it on a thermal relay and to improve the mounting density of the control panel. It is an object of the present invention to obtain a saturated reactor for a thermal relay that is capable of producing electric shock and is free from electric shock.

[Means for solving problems]

A saturation reactor for a thermal relay according to the present invention includes a saturation reactor main body having a winding and an iron core interlinking with the winding, and an outer surface provided with a mounting portion for mounting on a base surface such as a control panel, and a plurality of saturation reactors. An engaging portion provided on the case of a separate saturated reactor so that the reactor can be connected in a direction crossing the base surface, and an engaging portion engageable with the engaging portion and a resin case provided with the engaging portion. (1) The engaging portion of the case is provided on a surface facing the surface provided with the locking portion, and the mounting portion also serves as the engaging portion or the locking portion.

(2) The above case has a box shape with only one side open, and the saturated reactor main body is housed in the case from the opened part, and casting resin is injected to cover the charging part of the saturated reactor main body. , The saturated reactor body is fixed by solidification, and the lead of the winding is pulled out from the casting resin surface.

(3) The engaging portion of the case is provided with a first retaining protrusion having a taper shape which becomes lower in a direction opposite to the released surface of the case, and the engaging portion of the case further includes a case. Is provided with a second retaining protrusion having a taper shape which becomes lower toward the released surface.

(4) The first retaining protrusion and the second retaining protrusion are the first retaining protrusion and the second retaining protrusion when the locking portion and the engaging portion provided on the case are engaged with each other. Can also be engaged with the retaining projection.

It is what

[Action]

The saturation reactor for thermal relay in this invention is
It can be attached to a base surface such as a control panel using the attaching portion, and a plurality of connecting portions can be connected in the direction intersecting the base surface using the engaging portion and the locking portion.

Example of Invention

An embodiment of the present invention will be described below with reference to FIGS. That is, in the figure, (10) is the main body of the saturated reactor shown in FIG. 3, which is the coil (1) and the iron core interlinking with this coil (1).
(2), an iron core clamp (3) for tightening the iron core (2) with screws and nuts, and a lead wire (5). (11) houses the saturated reactor body (10). Epoxy resin,
It is a resin case made of polyurethane, etc., and has a box shape with one side open. (11a) is a convex engaging portion integrally formed on one outer side surface of the case (10), and (11B) is integrally formed on an outer side surface facing the surface on which the engaging portion (11A) is formed. It is a concave locking part. Then, the engaging portion (11A) and the engaging portion (11B), so that the engaging portion (11B) and the engaging portion (11A) formed in the case (11) of the other saturated reactor can be engaged respectively. The size and shape are taken into consideration. (11C) is a first retaining protrusion formed on the engaging portion (11A), and is a case
A tapered portion is formed on the bottom surface side of (11) so as to decrease toward the bottom surface. Reference numeral (11D) is a second retaining projection integrally formed with the locking portion (11B), and a taper portion is formed on the opening side portion of the case (11) so as to decrease in the opening direction. . (11E) is a third retaining projection integrally formed on one end of the locking portion (11B), (11F) is a mounting portion for mounting the saturated reactor on the control panel surface, and has a pair of screw holes (11G). Are formed. Also, this installation (11F)
Is also configured by using a part of the locking portion (11B) (open end surface of the concave open portion). Further, (12) is a casting resin which is injected and solidified in the case (11).

And, this saturation reactor, as shown in FIG.
The saturated reactor body (10) is stored in the case (11) with its lead wire (5) pulled out of the case (11), and then the casting resin (12) is opened on the open side of the case (11). The saturated reactor body (10) is assembled by injecting it so as to cover the charging part and solidifying it.

In addition, when using, on the base surface such as a control panel not shown,
Install using the screw that penetrates the mounting part (11F) and the screw hole (11G) formed in this mounting part (11F), and saturate the engaging part (11A) of this installed saturated reactor with the saturation Engage the locking part (11B) of the reactor to connect it in the direction orthogonal to the above-mentioned base surface, and use the lead wire (5) to electrically connect the saturation reactor in parallel to each heater of the thermal relay. Used by

When engaging the engaging portion (11B) and the engaging portion (11A), the first
Retaining protrusion (11C) and second retaining protrusion (11D)
In addition, since the tapered portions as described above are respectively formed,
The first retaining protrusion (11C) is the second retaining protrusion (11C).
Easily overcome D). Then, the first retaining protrusion (11C) and the second retaining protrusion (11D) are engaged with each other, and the engaging portion (11A) is engaged with the third retaining protrusion (11C).
E), and the concave locking part (11B) has a cross section And the convex engaging part (11A) Since it has a shape that engages with the portion, the engagement does not come off due to vibration or the like.

Further, in the above embodiment, the engaging portion (11B) and the engaging portion (11A)
On the opposite sides of the case (11),
(11F) was also used as the locking part (11B), but the locking part (11F)
B), the engaging part (11A) and the mounting part (11F) do not need to be provided in this way, and in short, when the saturated reactor is mounted on the base surface, a plurality of parts are provided in the direction crossing the base surface. If it is provided so that the saturated reactor can be connected,
The installation position, shape, etc. do not matter.

〔The invention's effect〕

As described above, according to the present invention, a saturated reactor main body having a winding wire and an iron core interlinking with the winding, and an attachment portion for attaching to a base surface such as a control panel are provided on the outer surface, and a plurality of saturated reactors are provided. And a resin case provided with an engaging portion engageable with the engaging portion and an engaging portion that are engageable with the engaging portion so that they can be connected in a direction intersecting with the base surface. , The saturated reactor body is stored in this case, and the saturated reactor body is fixed by injecting the casting resin so as to cover the charging part of the saturated reactor body and solidifying it, so that the saturated reactor can be attached to the thermal relay. In addition, the mounting part can be mounted on the base surface of the control panel, etc., so that the weight of the reactor will not be applied to the thermal relay and the mounting of the reactor will be difficult. Problems of mechanical strength can be solved Te. Further, since a plurality of reactors can be connected in a direction intersecting with the base surface, and a space for an insulation distance between the reactor and another electric device is not required, the mounting density of the control panel can be improved, As a result, the control panel can be downsized. The engaging portion of the case is provided with a first retaining protrusion having a taper shape which becomes lower in a direction opposite to the released surface of the case, and further, the engaging portion of the case is configured such that the case is released. Since the second retaining protrusions having a tapered shape that becomes lower in the direction of the surface are provided and engage with each other,
It can be engaged more firmly.

In addition, since the iron core and windings are fixed by the casting resin, vibration and magnetic noise do not occur when a current is applied, and the casting resin covers the charged part of the reactor, which provides safety against electric shock. improves.

[Brief description of drawings]

1 to 3 are diagrams according to an embodiment of the present invention.
FIG. 1 is a perspective view of a saturated reactor, FIG. 2 is a perspective view showing a state where a saturated reactor is being connected, FIG. 3 is a perspective view showing a state where a saturated reactor is being assembled, and FIGS. 4 and 5 are conventional examples. FIG. 4 is a perspective view of a saturated reactor,
FIG. 5 (A) is a front view showing a state in which the saturation reactor is attached to the thermal relay, and FIG. 5 (B) is a side view of FIG. 5 (A). In the drawings, the same reference numerals indicate the same or corresponding parts, (A) is a saturated reactor, (B) is a thermal relay, (10) is a saturated reactor main body, (11) is a case, (11A) is an engaging portion, (11B) is a locking part, (11F) is a mounting part, and (12) is a casting resin.

Claims (1)

[Claims] 1. A saturated reactor main body having a winding and an iron core that interlinks with the winding, an attachment portion for attaching to a base surface of a control panel or the like is provided on an outer surface, and a plurality of saturated reactors are provided on the base surface. A resin case provided with an engaging portion and an engaging portion engageable with the engaging portion and the engaging portion, which are provided in separate saturated reactor cases so that they can be connected in a crossing direction; The engaging portion of the case is provided on a surface facing the surface on which the locking portion is provided, and the mounting portion also serves as the engaging portion or the locking portion, and (b) the case is , A box shape with only one side open,
The saturated reactor main body is stored in the case from the released part, and the casting resin is injected to cover the charging part of the saturated reactor main body and solidified to fix the saturated reactor main body, and from the casting resin surface. The lead of the winding is pulled out, and (c) the engaging portion of the case further includes a first retaining protrusion having a tapered shape which becomes lower in a direction opposite to the released surface of the case. The locking portion is provided with a second retaining protrusion having a taper shape that becomes lower toward the released surface of the case, and (d) and the first retaining protrusion and the second retaining protrusion. The retaining protrusion of the second retaining protrusion is configured such that the first retaining protrusion and the second retaining protrusion can be engaged when the locking portion and the engaging portion provided on the case are engaged. Saturated rear for thermal relay featuring Torr.