JPS6040132B2 - Electromagnetic relay remote control circuit - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote control circuit for a Kasumi Shigeru relay used in a system in which indoor lighting can be turned on and off using switches provided at multiple locations.

As shown in Fig. 1, the sub-contact is such that the coil B of the magnetic holding type Kasumi Shigeru relay A, the fully changeable auxiliary contact C of this magnetic holding type electromagnetic relay A, and both fixed contacts a and b of this auxiliary contact C have opposite polarity to each other. an operation switch F in which two diodes D1, D2 connected to
This was a circuit in which a circuit consisting of two diodes ○3 and D4 connected to both fixed contacts e and f so as to have opposite polarities to each other was connected in series to an AC power source E.

In addition, since it can be operated from other locations, it has the same configuration as the switch SWI, which is composed of two diodes D3 and D4 connected in series with the operating switch F and both fixed contacts e and f so that the polarities are opposite to each other. Switch SW2, SW3.・
・... are connected in parallel. Note that G is an output contact of the magnetically held type electromagnetic appliance A to which a load L such as a lighting lamp is connected. Note that LEDI to LEDn are indicator lights that indicate the operating status of the magnetic retention type electromagnetic relay. FIG. 2 shows an example of a magnetically holding type electromagnetic relay A, in which a coil C is wound around an H' core and one end is connected to a yoke J. K is a permanent magnet, one end of which is connected to a yoke J, and the other end connected to a support plate M that rotatably supports a movable iron piece L. N is the terminal. In the case of the conventional example described above, switch S
When the operating switch F of WI is connected to the fixed contact e side, a current il flows and the coil B of the magnetic holding type electromagnetic relay A is excited, the auxiliary contact C is reversed, the fixed contact a side is closed, and the direction of the diode DI and diode D4 is is reversed, so the current i
l no longer flows.

The magnetic retention type electromagnetic relay A maintains an inverted state even if the current il stops flowing due to the magnetic flux of the permanent magnet K. However, if the operating switch F' of another switch SW2 is connected to the fixed contact f' side while the operating switch F is connected to the fixed contact e side, the current will be reduced. i2 flows, the auxiliary contact C of the magnetic holding type electromagnetic relay A is reversed again, and the fixed contact b side is closed. As described above, when the operation switch is operated at two locations at the same time, the magnetic holding type electromagnetic relay A repeats reversal at high speed and generates noise, and the output contact G frequently opens and closes under load, which can lead to welding or burnout. there were. In addition, in order to omit the auxiliary contact of the magnetic retention type electromagnetic relay and the diode connected in series to this auxiliary contact, a capacitor is connected in series with the coil of the magnetic retention type electromagnetic relay as shown in Figure 4, and this capacitor is charged. It has been proposed that the magnetic holding type electromagnetic relay is energized and reversed using the charging current until the capacitor C is completed. There also remains some dust in which the charging direction alternates and repeats frequent reversals similar to the conventional example shown in FIG.

Further, in the conventional example shown in FIG. 5, the charge stored in the capacitor C is discharged through the coil B' of the magnetically held electromagnetic relay by pressing the switch SWo, and is reversed by the discharge current i. The auxiliary contact switches and the capacitor C is charged in the reverse direction, so when the switch SWo is closed again, the current j flows in the reverse direction. However, the moment the auxiliary contact switches, the capacitor C is charged in the opposite direction, and the initially charged charge is rapidly discharged, causing a current in the opposite direction to flow through the coil, resulting in a magnetic retention type electromagnetic relay. When the inversion of the switch SW becomes unstable and another switch SWo connected in parallel with the switch SW is operated, the switch SW becomes unstable.
When o is pressed (simultaneous operation), the capacitor C is not sufficiently charged, so the current io is small and the magnetic holding type electromagnetic vertical electric device does not reverse. The present invention improves the above-mentioned drawbacks and provides a remote control circuit for an electromagnetic relay in which the magnetically held relay does not reverse frequently even when operating switches are operated at multiple locations at the same time.
A detailed explanation will be given below according to the drawings.

In Figure 3, 1 is a magnetic holding type electromagnetic relay, and 2
is a coil, 3 is a sliding door type auxiliary contact, and 4 is an output contact. Diodes D1 and D2 are connected to both fixed contacts a and b of the auxiliary contact 3 so as to have opposite polarities. 5,5
', 5'' are switches that can be mounted on a wall, etc.
Operation switches 6, 6', 6'' and this operation switch 6
A capacitor C is connected in series to the fixed twill point b on the normally closed side via a resistor r, and a connection point x between the capacitor C and the resistor r is connected to a light emitting diode LED1, L facing in opposite directions.
two switching elements S1 and S2 of different polarity, which are connected to the control terminal via ED2, and whose two poles, collector and emitter, are connected between the normally open side fixed contact of the operating switch and the capacitor C; Consists of.

Therefore, when the output contact 4 of the magnetic holding type electromagnetic appliance 1 is in the open state in the state shown in FIG. 3, the operating switch 6 switches from the normally closed fixed contact b to the normally open fixed contact a. When the switch is turned on, the charge on capacitor C becomes LE.
A current i is applied to the control terminal of the switching element SI via DI.
1 flows, and a current i2 is supplied from the power source E to excite the coil 2 of the magnetically holding type electromagnetic relay, so that the magnetically holding type electromagnetic relay is reversed and the auxiliary contact 3 is switched from the fixed contact b to the fixed contact a.

The output contact 4 is then closed and loaded to turn on, for example, a lighting lamp. At this time, as shown in FIG. 6, since there is a diode D3 in the capacitor C with the polarity through which the current iQ that is about to be charged in the opposite direction flows, the current iQ' does not flow and is discharged in the direction of the current i, thus discharging the magnetically holding type. The electromagnetic relay 1 has completely completed the reversal. Note that the diode diagram indicated by the dotted line in the figure shows that the switching element is an NPN type. Even if the operation switch 6 is continued to be operated in this state, it will not affect the magnetic retention type electromagnetic relay 1 in any way, and if the operation switch 6' is connected with the fixed contact side facing the switching element S' in this state, the switching element S' will become conductive. In this state, the current i3 flows and the magnetic holding type electromagnetic relay 1 is reversed again. In other words, it is a type that gives priority to the last operation, which stabilizes in the direction of the last operation. Note that the light emitting diodes LED1 and LED2 are lit in the same direction as the diodes D1 and D2, so the direction in which the two diodes D1 and D2 are lit indicates that the magnetic holding type electromagnetic relay 1 is inverted. I can know. As described above, according to the remote control circuit of the electromagnetic relay of the present invention, two diodes are connected to the coil of the magnetically held type electromagnetic relay and both fixed contacts of the switching type auxiliary contact of this magnetically held type electromagnetic relay, respectively, with opposite polarities. , a capacitor that is charged in opposite directions by positive waves and negative waves of an AC power source through a normally closed contact of an operating switch, and two switching elements with mutually opposite polarities that are controlled by the charged charges of this capacitor. and fixing the switching element, the coil of the magnetic holding type electromagnetic relay, the switching type auxiliary contact of the magnetic holding type Kasumi-Shige relay, and the switching type auxiliary contact through the normally open contact of the operation switch. The remote control circuit for the military relay is constructed by connecting a series circuit of two diodes with opposite polarity to the contacts to an AC power supply, so that while the operation switch 6 is continuously operated, other Operation switch 6
Even if ' is operated, the magnetic holding type electromagnetic relay 1 does not repeatedly open and close frequently as in the conventional example shown in FIG. 1, and the reversal direction is always determined by the last operating switch operated. Therefore, if this operation switch is not operated manually but is used with an output contact of another electrical device such as a photoelectric blinker or an automatic time switch, the contact may be closed for a long time on the normally open contact side, for example. However, even with such a method of use, in the case of the circuit of the present invention, there is no guarantee that the magnetic holding type electromagnetic relay will open and close frequently even if other switches connected in parallel are operated. Therefore, there is no risk of the output contacts welding or burning out. Indicator light LED1
, LED2... show stable illuminance without any change in brightness as in the conventional example shown in Fig. 1 even if many switches 5, 5', 5'' are connected. It shows an extremely excellent effect as an operation circuit for electromagnetic vertical electrical equipment in a system that can be operated from multiple locations.Brief explanation of the drawings Figures 1 and 4 are electrical circuit diagrams showing a conventional example. FIG. 2 is a side view of a magnetic retention type electromagnetic relay, and FIG. 3 is an electric circuit diagram showing an embodiment of the present invention.

FIG. 6 is an electrical circuit diagram showing the operating state of the present invention.
1...Magnetic retention type electromagnetic relay, 2...
Coil, 3... Auxiliary bush point, 4... Output contact, 5... Switch, 6... Operation switch, DI to D4, DI' to D4'... Diode, S
1, S2, SI', S2'...Switching element, LED1, LED2, LEDI', LED2'...
...Indicates a light emitting diode.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1. Two diodes connected to the coil of a magnetic retention type electromagnetic relay, two fixed contacts of a switching type auxiliary contact of this magnetic retention type electromagnetic relay, respectively, with opposite polarities, and a normally closed operation switch. The operating device includes a capacitor that is charged in opposite directions by positive waves and negative waves of an AC power source through a contact, and two switching elements with mutually opposite polarities that are controlled by the charged charges of this capacitor. Connected to the switching element, the coil of the magnetic retention type electromagnetic relay, the switching type auxiliary contact of the magnetic retention type electromagnetic relay, and both fixed contacts of the switching type auxiliary contact through the normally open contact of the switch, with opposite polarity. A remote control circuit for an electromagnetic relay, characterized in that a series circuit with two diodes is connected to an alternating current power source. 2. Claims characterized in that the two switching elements are an NPN transistor and a PNP transistor, and the collector of the transistor and the normally open fixed contact of the operating switch are connected by diodes with opposite polarities. A remote control circuit for an electromagnetic relay according to item 1.