JPH0326608Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention has the effect that every time the operation switch is turned on,
This invention relates to an improvement in the control circuit of an electromagnetic device in a remote control relay that has a contact that can be switched from OFF to ON or from ON to OFF.

Conventionally, a control circuit for this type of device has been used, for example, in a remote control relay, and the circuit is configured as shown in FIG. That is, in the figure, reference numeral 1 denotes an electromagnetic device, such as an electromagnet, which has an energizing coil 1a and will be explained in detail later with reference to FIG. (not shown)
Contacts that are turned on and off; 3 and 4 are terminals connected to the contact 2; 5 is a changeover switch that is linked to the contact 2 and has a pair of changeover contacts a, b and a common contact c; When the contactor 2 is ON, the changeover contact a of the changeover switch 5 is closed with the common contact c, and when the contactor 2 is OFF, the changeover contact b of the changeover switch 5 is closed with the common contact c. 6 is a diode whose anode is connected to the changeover contact a of the changeover switch 5, 7 is a diode whose cathode is connected to the changeover contact b of the changeover switch 5, and 8 is a diode to which the cathode of the diode 6 and the anode of the diode 7 are connected. 9 is the control power terminal of the switch 5, and the energizing coil 1a of the electromagnetic device 1 is connected to the common contact c of the changeover switch 5.
the other control power supply terminal connected via 101
is a remote control relay, which is composed of codes 1 to 9. 102 turns remote control relay 101 on and off
A remote switch for operation (hereinafter referred to as a remote control switch), which is designated by reference numerals 10 to 14 below.
It is made up of. 10 and 11 are the control transformer 1 between the control power terminals 8 and 9 of the remote control relay 101.
Terminal 5 is connected via the secondary side of terminal 5, 12 is an operation switch, such as a push button switch, connected between these two terminals, and 13 is connected between both terminals 10 and 11 via a current limiting resistor 14. It is a light emitting diode, connected in parallel to the operation switch 12, and turns the remote control relay 101 ON and OFF.
It is used to display the status. 16 is a lamp load connected between both terminals 3 and 4 via a power source 17, and 18 is a power source connected to the primary side of the operating transformer 15.

FIG. 2 is a sectional view showing details of the electromagnetic device 1, the opening/closing mechanism, and the contactor 2 described in FIG. 1. In addition to the biasing coil 1a shown in FIG. 1, the electromagnetic device 1 includes a fixed core 1b around which the biasing coil 1a is wound, and a space formed by the biasing coil 1a and the fixed core 1b. The movable iron core 1c is driven by a movable iron core 1c and returned to its original position (the position shown in the figure). The contactor 2 has a movable contactor 2a and a fixed contactor 2b. The opening/closing mechanism 19 includes an escape wheel 19a, and an escape wheel 19a.
a latch 19b that is connected to the contactor 2 and the changeover switch 5 and transmits the force generated by the electromagnetic device 1 as a rotational force in order to open and close the changeover switch 5; a cam that is coaxially connected to the escape wheel 19a and is rotated by the rotational force; 19c, and a coupling member 19d that is integrally configured with the movable core 1c of the electromagnetic device 1 and transmits the force generated by the electromagnetic device 1.

Next, the operation of the conventional remote control relay will be explained. That is, when the contact 2 of the remote control relay 101 is in the OFF state shown by the dashed line in FIG.
Operation switch 12 of remote control switch 102
When turned ON, i.e., pressed, the operating current flows between the operating transformer 15 - terminal 11 - operating switch 12 - terminal 10
- control power terminal 8 - diode 7 - switching contact b of changeover switch 5 - common contact c - energizing coil 1a of electromagnetic device 1 - control power terminal 9 - operating transformer 15
2, the energizing coil 1a of the electromagnetic device 1 is energized and the movable core 1c is attracted or driven to the right in FIG. 2 against the force of a spring (not shown). Then, the latch 19b of the opening/closing mechanism 19 rotates the escape wheel 19a, which in turn causes the cam 19c to rotate.
After a predetermined period of time after the operation switch 12 is turned on by rotating it to the position indicated by the solid line, the movable contact 2a of the contact 2 comes into contact with the fixed contact 2b, and the contact 2 is turned on. As a result, current flows through the lamp load 16 and the lamp load 16 lights up.
Switching contact a of the switching switch 5 interlocking with the contactor 2
is closed with the common contact c, and the operating current is passed from the operating transformer 15 to the control power terminal 9 - the energizing coil 1 a - the common contact c - the switching contact a - the diode 6 - the control power terminal 8 - the terminal 10 - the operating switch 12 - the terminal 11
through to the operating transformer 15 in the opposite direction.
Due to this operating current in the opposite direction, the energizing coil 1a
is energized again, but due to the inertia of the opening/closing mechanism 19, the latch 19b has not returned to the position where it hooks the escape wheel 19a.
remains in contact with a, so contact 2 is ON
remains in the state. Next, when the operating switch 12 is turned OFF, that is, released, the display current flows between the energizing coil, the control power supply terminal 9, the energizing coil 1a of the electromagnetic device 1, the common contact c of the changeover switch 5, the changeover contact a, the diode 6, and the control Power terminal 8-terminal 10
- The current flows through the light emitting diode 13 - the current limiting resistor 14 - the terminal 11 - the operating transformer 15, and the light emitting diode 13 of the remote control switch 102 lights up, indicating that the contact 2 of the remote control relay 101 is in the ON state, that is, the closed state. indicate. Since this display current is a small current limited by the current limiting resistor 14, it cannot attract the movable core 1c of the electromagnetic device 1, and therefore the movable core 1c is moved by the above-mentioned spring (not shown). However, the contact 2 is kept in the ON state as described above. Next, when the operation switch 12 of the remote control switch 102 is turned ON again, the operation current changes from the operation transformer 15 to the control power terminal 9 to the electromagnetic device 1.
energizing coil 1a-common contact c of selector switch 5
- Switching contact a - Diode 6 - Control power supply terminal 8 -
The flow passes through the terminal 10, the operating switch 12, the terminal 11, and the operating transformer 15, and the energizing coil 1a of the electromagnetic device 1 is energized to attract the movable core 1c. but
OFF, the lamp load 16 turns off, and
The changeover switch 5 is switched so that its changeover contact b is closed with the common contact c, and the operating current flows in the opposite direction to that described above. Next, turn the operation switch 12 again.
When the OFF operation is performed, the energizing coil 1a of the electromagnetic device 1
is deenergized, the movable core 1c of the electromagnetic device 1 is released from attraction and returns to its original position, but the contactor 2 is maintained in the OFF state by the opening/closing mechanism 19.
At this time, since the polarities of the diode 7 and the light emitting diode 13 are opposite to each other, no current flows, and the light emitting diode 13 of the remote control switch 102 turns off, indicating that the contact 2 of the remote control relay 101 is in the OFF state. .

By the way, FIG. 3 shows the relationship between the operating state of the remote control switch 102 and various current states of the remote control relay 101, and FIG.
3b shows the operating current of the electromagnetic device 1 and the display current of the light emitting diode 13, and FIG. 3c shows the current of the lamp load 16. When the operating switch 12 of the remote control switch 102 is turned ON at time T _A as shown in FIG _. At this point, the changeover switch 5 is switched from the changeover contact B to the changeover contact A, so the direction of the current changes and a positive half wave flows, and the contact 2 turns ON at the time T _B as shown in Figure 3c. As a result, current flows through the lamp load 16.
Then, when the operation switch 12 is turned OFF at the time T _C , the operation current of the electromagnetic device 1 is changed to the light emitting diode 1.
The display current becomes 3, and the light emitting diode 13 is turned on. After that, when the operation switch 12 is turned ON at the time T _D , the contact 2 is turned on at the time T _E.
When the lamp is turned OFF and no current flows through the lamp load 16, the changeover switch 5 is changed over, and the remote control relay 101 is turned OFF by turning the operation switch 12 OFF again at the time T _F.

However, in the conventional remote control relay 101, as shown in FIG. 3b, the operating current of the electromagnetic device 1 is reversed and flows in intermittent half waves, so a follow-up circuit such as a flywheel diode cannot be connected. First, the electromagnetic device 1 vibrates and produces sound, and the movable iron core 1c of the electromagnetic device 1 has weak attractive force. In addition, as shown in FIG. 3b, in order to forcibly reduce the operating current of the electromagnetic device 1 to zero by the changeover switch 5 at time T _B , the inductance L of the electromagnetic device 1 is
A surge voltage of Ldi/dt caused by this is applied between the contacts of the changeover switch 5, and the energy of the magnetic field stored in the inductance L of the electromagnetic device 1 is released between the contacts, causing the arc energy between the contacts to increase. This caused problems with the contact performance of the selector switch 5.

This idea was made in order to eliminate the drawbacks of the conventional ones as mentioned above, and it was created by creating an electromagnetic device with a continuous operating current, no sound due to vibration, a large driving force, and a changeover switch with good contact performance. The present invention attempts to provide a control circuit for an electromagnetic device in a remote control relay having the following.

An embodiment of this invention will be described below with reference to the drawings. 4 and 5 both show one embodiment of this invention, with FIG. 4 showing its circuit, and FIG. 5 showing a circuit of an example of its use.
In the figure, reference numerals 19, 20, and 21 are diodes, or rectifying elements, whose anodes are respectively connected to the changeover contact a, changeover contact b, and common contact c of the changeover switch 5, and whose cathodes are connected together.
The energizing coil 1a of the electromagnetic device 1 is connected in parallel to the diode 21. The changeover contact a of the changeover switch 5 and the anode of the diode 19 are connected to one control power supply terminal 8, and the changeover contact b of the changeover switch 5 and the anode of the diode 20 are connected to the other control power supply terminal 9.

Next, the operation of this invention will be explained. That is, the fifth
When the contact 2 of the remote control relay 101 shown in the figure is in the OFF state, when the operation switch 12 of the remote control switch 102 is turned OFF, the operation current flows from the operation transformer 15 to the terminal 11 to the operation switch 12.
The flow passes through the terminal 10 - the control power supply terminal 8 - the diode 19 - the energizing coil 1a of the electromagnetic device 1 - the common contact c of the changeover switch 5 - the changeover contact b - the control power supply terminal 9 - the operating transformer 15, The movable coil 1a is energized and the movable iron core (1c in Fig. 2)
The opening/closing mechanism (1 in Figure 2)
9), contact 2 is turned on and lamp load 1 is turned on.
6, the lamp load 16 lights up, and the changeover contact a of the changeover switch 5 changes to the common contact c.
, the operating current flows through the operating transformer 15 - the control power terminal 9 - the diode 20 - the energizing coil 1a of the electromagnetic device 1 - the common contact c of the changeover switch 5 - the changeover contact a - the control power supply terminal 8 terminal 10 - the operation switch 12 - terminal 11 - flows through the actuating transformer 15 and in the same direction through the energizing coil 1a. Next, when the operation switch 12 is turned OFF, the displayed current changes from the operation transformer 15 to the control power terminal 9 to the diode 20.
- energizing coil 1a of electromagnetic device 1 - changeover switch 5
common contact c - switching contact a - control power supply terminal 8 - terminal 10 - light emitting diode 13 - current limiting resistor 1
4 - terminal 11 - flows through the operating transformer 15 15 and the light emitting diode 1 of the remote control switch 102;
3 lights up, and contact 2 of remote control relay 101
Displays that it is ON.

As in the conventional case, this display current is a small current limited by the current limiting resistor 14, so the movable core (1c in Fig. 2) of the electromagnetic device 1 is not attracted and returns to its original position. However, as mentioned above, the contact 2 is closed by the opening/closing mechanism (19 in Fig. 2).
remains in the ON state.

Next, when the operation switch 12 of the remote control switch 102 is turned ON again, the operation current flows through the operation transformer 15 - control power supply terminal 9 - diode 20 - energizing coil 1a of the electromagnetic device 1 - common contact c of the changeover switch 5 - changeover contact. a - Control power supply terminal 8 - Terminal 1
0-operation switch 12-terminal 11-operation transformer 15, the energizing coil 1a of the electromagnetic device 1 is energized again and the movable iron core (1c in FIG. 2) is attracted, so that the opening/closing mechanism ( Figure 2 1
9), the contactor 2 is turned OFF, the lamp load 16 is turned off, and the changeover contact b of the changeover switch 5 is closed with the common contact c, and the operation current is transferred from the operation transformer 15 to the terminal 11 to the operation switch 12 to the terminal. 10 - control power supply terminal 8 - diode 19 - energizing coil 1a of electromagnetic device 1 - common contact c of changeover switch 5 - changeover contact b - control power supply terminal 9 - operating transformer 15.

Next, when the operating switch 12 is turned OFF again, the energizing coil 1a of the electromagnetic device 1 is deenergized, so the movable core (1c in Fig. 2) of the electromagnetic device 1 is released from attraction and returned to its original position. Although it returns to normal, the contactor 2 is held in the OFF state by the opening/closing mechanism (19 in FIG. 2) as in the conventional case. At this time,
Since the polarities of the diode 19 and the light emitting diode 13 are opposite to each other, no current flows, the light emitting diode 13 of the remote control switch 102 turns off, and the contact 2 of the remote control relay 101 indicates that it is in the OFF state. By the way, FIG. 6 shows the operating status of the remote control switch 102 and the remote control relay 10.
1. FIG. 6a shows the operating state of the remote control switch 102, FIG. 6b shows the current flowing through the operating transformer 15, and FIG. 6c shows the operating current of the electromagnetic device 1 and the light emitting diode. 13 and FIG. 6d shows the current of the lamp load 16, respectively. As shown in Figure 6a, T _A
At this point, the operation switch 1 of the remote control switch 102
2 is turned on, a negative half wave first flows through the operation transformer 15 as shown in _FIG .
, the direction of the current changes and a positive half-wave flows, and at the time T _C the operating switch 12
When turned OFF, a display current flows through the light emitting diode 13, and the light emitting diode 13 is turned on.
Then, as shown in FIG. 6d, the contactor 2 is turned on at time T _B , and the current of the lamp load 16 flows.
Note that the operations at times T _D , T _E , and _TF are as described above.

Here, the operation current of the electromagnetic device 1 has a constant flow direction as shown in FIG. Instead of a regular current, a continuous follow-on current as shown in FIG. 6c flows. This diode 21 is generally called a flywheel diode, and is used to form a circulating current path for releasing the energy of the magnetic field stored in the inductance L of the energizing coil 1a of the electromagnetic device 1. , and a continuous follow-on current flows as shown in FIG. 6c. Therefore, the electromagnetic device 1 does not generate sound due to vibration, and has a larger driving force than the conventional device. Further, a surge voltage is not applied between the contacts of the changeover switch 5, and the energy of the magnetic field stored in the inductance L of the electromagnetic device 1 is not released between the contacts.
Therefore, the arc energy between the contacts is reduced, and the contact performance of the changeover switch 5 is improved.

As shown in FIG. 7, the switching contacts a and b of the switching switch 5 and the diodes 19 and 2
The polarities of 0 and 21 may be reversely connected to those in the above embodiment, and the same effect as in the above embodiment can be obtained.

Furthermore, in both of the above examples, 19, 20, 21
Although diodes are shown, it goes without saying that a rectifying element other than a diode may be provided and the same effects as in both of the above embodiments can be obtained.

Further, in each of the above embodiments, the case of a remote control relay has been described, but an operating member other than a contact may be used, and the same effects as in each of the above embodiments can be achieved.

As described above, according to this invention, the flow direction of the operating current of the electromagnetic device is kept constant by the functions of the changeover switch and the rectifying element, and the flywheel diode is connected in parallel with the energizing coil of the electromagnetic device. As a result, since the operation current of the electromagnetic device flows continuously, it is possible to produce an electromagnetic device that does not generate sound due to vibration and has a large driving force. Furthermore, since the arc energy between the contacts is reduced, it also has the effect of improving the contact performance of the changeover switch.

[Brief explanation of the drawing]

Figures 1 to 3 all show conventional remote control relays; Figure 1 is a circuit diagram showing an example of its use, Figure 2 is a sectional view of its mechanical configuration, and Figure 3 is its ON, Explanatory diagrams showing various current states during OFF operation, Figures 4 to 6 all show a remote control relay according to an embodiment of this invention, Figure 4 is its circuit diagram, and Figure 5 shows its use. Schematic diagram showing an example,
FIG. 6 is an explanatory diagram showing various current states during ON/OFF operation, and FIG. 7 is a circuit diagram showing an example of use of a remote control relay according to another embodiment of this invention. In the figure, 1 is an electromagnetic device, 1a is an energizing coil, 5 is a changeover switch, a is a changeover contact, b is a changeover contact, and c
is a common contact, 8 and 9 are control power supply terminals, 12 is an operation switch, 13 is a photodiode, 19, 20, and 2
1 is a diode. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] a pair of control power supply terminals to which an alternating current voltage is applied via the operation switch; a contactor which is opened and closed via an energizing coil of an electromagnetic device between the control power supply terminals each time the operation switch is turned on; Equipped with a changeover switch having a pair of changeover contacts and a common contact that perform switching operations in conjunction with each other, and three rectifier elements,
One switching contact of the switching switch is connected to one control power terminal, the other switching contact of the switching switch is connected to the other control power terminal, and the same poles of one of the rectifying elements are connected together. The other pole of each of the rectifying elements is connected to one switching contact, the other switching contact, and the common contact of the switching switch, and the above rectifying element is connected in parallel to the common contact of the switching switch. A control circuit for an electromagnetic device connected to an energizing coil.