KR101393818B1 - Hybrid relay - Google Patents

Abstract

A second mechanical contact switch whose contacts are opened and closed by a second driving unit which is separate from the first driving unit and a second mechanical contact switch whose contacts are opened and closed by the first driving unit, A series circuit of the second mechanical contact switch and the semiconductor switch and the first mechanical contact switch are connected in parallel on a power supply line which is provided with a switch and supplies the power from the power supply to the load, And a snubber circuit is connected in parallel.

Description

Hybrid Relay {HYBRID RELAY}

The present invention relates to a hybrid relay having a mechanical contact switch and a semiconductor switch.

Background Art [0002] Conventionally, loads such as a lighting device having an inverter circuit for controlling an inverter are used. Further, a hybrid relay including a mechanical contact switch and a semiconductor switch connected in parallel is used in order to switch supply and cutoff of electric power to the load. A load having an inverter circuit is provided with a large-capacity smoothing capacitor for converting AC voltage to DC voltage. When power is supplied from the AC power source to the load, an inrush current flows into the load because a large current flows into the smoothing capacitor. Particularly, under a high load condition where the power supply voltage is high, the rush current flowing into the load becomes large. Therefore, a large current based on the rush current flows also in the hybrid relay connected between the load and the AC power source.

Therefore, in such a hybrid relay, since the semiconductor switch becomes conductive first, a large current based on the rush current flows in the mechanical contact switch, thereby avoiding occurrence of contact welding of the contact pair of the mechanical contact switch.

In the following description, it is assumed that "the semiconductor switch is in the closed state" and "the mechanical contact switch is in the closed state" are respectively referred to as "semiconductor switch is on", "mechanical contact switch is on" Quot;

Likewise, in the following description, "the semiconductor switch becomes an open state" and "the mechanical contact switch is opened" are respectively referred to as "semiconductor switch is off", "mechanical contact switch Quot; off ".

After the inrush current flows into the semiconductor switch, when the current supplied to the load becomes a normal state, the mechanical contact switch is turned on. By this operation, it is possible to suppress the flow of a large current to the mechanical contact switch in the hybrid relay and to avoid contact welding caused by generation of an arc immediately before the contact pair of the mechanical contact switch is contacted.

In this way, the hybrid relay is provided with a semiconductor switch for preventing contact welding at the mechanical contact switch. Therefore, the mechanical contact switch is turned on after the semiconductor switch is turned on, and then the semiconductor switch is turned off, and then the power supply to the load is started.

Further, before the mechanical contact switch and the semiconductor switch are turned on, a hybrid relay having a configuration in which other mechanical contact switches other than the mechanical contact switch are connected in series with the corresponding semiconductor switch has been proposed (see, for example, Patent Document 1 ). The circuit configuration of this hybrid relay will be described with reference to Fig. 5 is a schematic circuit diagram showing a circuit configuration of a conventional hybrid relay.

The hybrid relay 1 is connected to an AC power supply 2 and a load 3 connected in series and forms a closed circuit with the AC power supply 2 and the load 3. The hybrid relay 1 has a terminal 10 connected to the other end of the AC power supply 2 having one end connected to one end of the load 3 and a terminal 11 connected to the other end of the load 3, A first mechanical contact switch 12 having a contact portion S1 to which both ends are connected to the terminals 10 and 11 and a second mechanical contact switch 12 having one end connected to the connection node between the terminal 10 and one end of the contact portion S1 A second mechanical contact switch 13 having a connected contact point S2 and a triac S3 connected to a terminal T1 at the other end of the contact point S2 and connected to the terminal 11 via a T2 electrode, And a signal processing circuit 16 for performing ON / OFF (closed) control of each of the first and second mechanical contact switches 12 and 13 and the semiconductor switch 14 Respectively.

Power supply from the AC power supply 2 via the hybrid relay 1 to the load 3 is performed based on an instruction from the signal processing circuit 16. [ Specifically, based on an instruction from the signal processing circuit 16, the second mechanical contact switch 13 and the semiconductor switch 14 are turned on, respectively. The second mechanical contact switch 13 and the semiconductor switch 14 connected in series are connected in parallel to each other after power is supplied from the AC power supply 2 to the load 3 on the basis of an instruction from the signal processing circuit 16. [ The connected first mechanical contact switch 12 is turned on. The semiconductor switch 14 and the second mechanical contact switch 13 are turned off in this order based on an instruction from the signal processing circuit 16. [ The start of power supply from the AC power source 2 to the load 3 is started when the triacs S3 of the semiconductor switch 14 are turned on at the timing of turning on the second mechanical contact switch 13 and the semiconductor switch 14 The power supply line is formed by the power supply line. The electric power supply from the AC power source 2 to the load 3 is stopped after the second mechanical contact switch 13 and the semiconductor switch 14 are turned off, .

The interruption of power supply from the AC power source 2 to the load 3 through the hybrid relay 1 in the state in which the first mechanical contact switch 12 is turned on can be controlled by the instruction of the signal processing circuit 16 . Specifically, based on an instruction from the signal processing circuit 16, the second mechanical contact switch 13 and the semiconductor switch 14 are turned on, respectively. Thereby, the power feeding path through the second mechanical contact switch 13 and the semiconductor switch 14 is established and a part of the current flowing to the load 3 is supplied to the second mechanical contact switch 13 and the semiconductor switch 14 The current flowing through the first mechanical contact switch 12 is reduced. Then, based on an instruction from the signal processing circuit 16, the first mechanical contact switch 12 is turned off and the semiconductor switch 14 and the second mechanical contact switch 13 are turned off in this order. The interruption of the supply of power from the AC power supply 2 to the load 3 is performed in synchronization with the turn-off of the semiconductor switch 14.

The hybrid relay 1 disclosed in Patent Document 1 has a latching type first mechanical contact switch 12 provided on a power feeding path to a load and the first mechanical contact switch 12 The second mechanical contact switch 13 and the semiconductor switch 14 are operated. As a result, the power consumption at the time of using the hybrid relay 1 can be reduced.

Japanese Patent Application Laid-Open No. 2010-103099

In view of such conventional problems, the present invention provides a hybrid relay which effectively suppresses the occurrence of malfunctions of a semiconductor switch and a load when noise occurs between the contacts of the contact portion of the mechanical contact switch.

According to an embodiment of the present invention, there is provided a portable electronic device, comprising: a first mechanical type contact switch which is opened and closed by a first driving unit; a second mechanical type contact switch whose contacts are opened and closed by a second driving unit which is separate from the first driving unit; A series circuit of a second mechanical contact switch and a semiconductor switch and a first mechanical contact switch are connected in parallel on a power supply path for supplying power from the power supply to the load, Is a latching type mechanical contact switch in which a current is supplied to the first drive unit when a contact of the first mechanical contact switch is opened and closed, and the second mechanical contact switch and the semiconductor switch are connected to each other at a contact of the first mechanical contact switch Before turning on and off, each of them is turned on. After switching the opening and closing of the contact of the first mechanical contact switch Respectively, and a snubber circuit is connected in parallel to the first mechanical contact switch.

It is preferable that the snubber circuit is formed by serially connecting a resistor constituting a semiconductor switch and a capacitor provided so as to be connected in parallel to the phototriac of the semiconductor switch.

The snubber circuit is preferably formed by a series circuit of a resistor and a capacitor connected in parallel to the semiconductor switch.

It is preferable that the resistance constituting the snubber circuit is a resistance against surge.

According to the embodiment of the present invention, it is possible to effectively suppress the occurrence of malfunction of the semiconductor switch and the load when noise occurs between the contacts of the contact portion of the mechanical contact switch.

1 is a schematic circuit diagram showing a circuit configuration of a hybrid relay of the first embodiment.
2 is a timing chart for explaining an example of the operation timing of the hybrid relay of the first embodiment when the load is turned on.
3 is a timing chart for explaining an example of the operation timing of the hybrid relay of the first embodiment when the load is turned off.
4 is a schematic circuit diagram showing a circuit configuration of a hybrid relay according to a modification of the first embodiment.
5 is a schematic circuit diagram showing a circuit configuration of a conventional hybrid relay.
6 is a timing chart for explaining an example of the operation timing in the conventional hybrid relay.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which form a part hereof. In the drawings, the same or similar parts are denoted by the same reference numerals and the description thereof will be omitted.

 (First Embodiment)

A hybrid relay according to a first embodiment of the present invention will be described with reference to the drawings. 1 is a schematic circuit diagram showing the circuit configuration of the hybrid relay 1 of the first embodiment.

One . The configuration of the hybrid relay 1

1, the hybrid relay 1 of the first embodiment is connected to an AC power supply 2 and a load 3 connected in series, thereby forming a closed circuit with the AC power supply 2 and the load 3 do. That is, power supply from the AC power supply 2 to the load 3 and interruption of power supply are performed in accordance with the ON state and the OFF state of the hybrid relay 1. The AC power supply 2 is, for example, a commercial power supply of 100 V or the like. The load 3 is, for example, a lighting device including a fluorescent lamp or an incandescent lamp, or a ventilation line.

The hybrid relay 1 includes a terminal 10 connected to the other end of the AC power supply 2 having one end connected to one end of the load 3 and a terminal 11 connected to the other end of the load 3, A first mechanical contact switch 12 including a contact portion S1 having one end connected to the terminal 10 and a second mechanical contact switch 12 having one end connected to the connection node between the terminal 10 and one end of the contact portion S1 A second mechanical contact switch 13 including a connected contact point S2 and a triac S3 having a T1 electrode connected to the other end of the contact point S2 and a T2 electrode connected to the terminal 11, And a signal processing circuit 16 for performing control such that the first and second mechanical contact switches 12 and 13 and the semiconductor switch 14 are turned on or off respectively .

The circuit configuration of the hybrid relay 1 will be described in detail. In the hybrid relay 1, a series circuit constituted by the contact portion S2 of the second mechanical contact switch 13 and the triac S3 of the semiconductor switch 14 and the series circuit constituted by the first mechanical contact switch 12 And terminals 10 and 11 in parallel.

The first mechanical contact switch 12 is a latching mechanical contact switch and includes a magnetic coil L1 for generating an electromagnetic force for switching the contact portion S1 to an on state and a magnetic coil L1 for turning off the contact portion S1 And a magnetic coil L2 for generating electromagnetic force for switching. That is, the magnetic coils L1 and L2 constitute the first drive part of the first mechanical contact switch 12.

The second mechanical contact switch 13 is a normally-energized mechanical contact switch and has a magnetic coil L3 for generating an electromagnetic force for keeping the contact S2 in the ON state. That is, the magnetic coil L3 constitutes the second drive portion of the second mechanical contact switch 13.

In the first mechanical contact switch 12, one end of the magnetic coil L1 is connected to the cathode electrode of the diode D3 connected to the signal processing circuit 16 while the anode electrode is connected to the magnetic coil L2, The anode electrode is connected to the cathode electrode of the diode D4 connected to the signal processing circuit 16. [ The other ends of the magnetic coils L1 and L2 are connected to each other. The connection node of these magnetic coils L1 and L2 is grounded and is connected to the anode electrode of each of the diodes D1 and D2. In the following description, " grounding " means connecting to the reference voltage in the hybrid relay 1. [

The cathode electrode of each of the diodes D1 and D2 is connected to the cathode electrode of each of the diodes D3 and D4. In this way, the first mechanical contact switch 12 includes the series-connected magnetic coils L1 and L2, the diodes D1 and D2 to which the anode electrodes are connected, and the anode electrode connected to the signal processing circuit 16 And diodes D3 and D4.

The second mechanical contact switch 13 is constituted by one magnetic coil L3 and a diode D5 connected in parallel with the magnetic coil L3. The connection node of one end of the magnetic coil L3 and the anode electrode of the diode D5 is grounded and the connection node of the other end of the magnetic coil L3 and the cathode electrode of the diode D5 is connected to the signal processing circuit 16 Respectively.

The semiconductor switch 14 includes a triac S3, a capacitor C1, a resistor R1 and a capacitor C2 connected in parallel between the T2 electrode of the triac S3 and the gate electrode G, A phototriac coupler including a resistor R2 whose one end is connected to the T1 electrode of the triac S3 and a phototriac S4 whose T1 electrode is connected to the other end of the resistor R2, (15).

When the contact portion S2 of the second mechanical contact switch 13 is turned on, a large current based on the rush current flows also in the semiconductor switch 14, and therefore the resistor R2 is preferably an internal surge resistance.

The capacitor C2 is connected in parallel to the series circuit of the photo-triac S4 and the resistor R1 and is connected in series with the resistor R2. A snubber circuit is formed in the semiconductor switch 14 by connecting the resistor R2 and the capacitor C2 in series. As shown in Fig. 1, this snubber circuit is provided so as to be connected in parallel to the first mechanical contact switch 12. Fig.

The photo-triac coupler 15 further includes a light-emitting diode (LD) having an anode electrode connected to the signal processing circuit 16 via a resistor R3 and a cathode electrode grounded. In the phototriac coupler 15, an optical signal from the light emitting diode LD is incident on the phototriac S4 whose T2 electrode is connected to the gate electrode G of the triac S3. The phototriac S4 is a semiconductor switching device having a zero-cross pointing function and when the optical signal from the light emitting diode LD is incident, the phototriac S4 is connected to the T2 electrode side (Reference voltage) of the alternating voltage by the alternating-current power supply 2 and is conducted for the first time.

2 . Power supply by hybrid relay (1)

An operation when power is supplied to the hybrid relay 1 from the AC power supply 2 to the load 3 will be described with reference to the timing chart of Fig. 2 is a timing chart showing the operation timing of the hybrid relay 1 when the load 3 is turned on via the hybrid relay 1 of the first embodiment, As shown in Fig.

The operation of each section in the hybrid relay 1 when the signal processing circuit 16 is instructed to supply power from the AC power supply 2 to the load 3 will be described below. As shown in Fig. 2, the signal processing circuit 16 outputs a signal for supplying a drive current to the magnetic coil L3 at time t0. Electromagnetic attraction is generated in the magnetic coil L3 based on the drive current supplied in accordance with this signal and the contact portion S2 of the second mechanical contact switch 13 including the magnetic coil L3 is energized at time t1 As shown in Fig. The diode D5 connected in parallel with the magnetic coil L3 functions as a reverse current prevention diode for preventing a current flowing in the magnetic coil L3 from flowing backward. Since the contact portion S2 of the second mechanical contact switch 13 is turned on at time t1, the voltage between the contacts of the contact portion S2 is lowered as shown in Fig.

1, a semiconductor switch 14 is provided in parallel with a series circuit of a resistor R2 constituting the semiconductor switch 14 and a phototriac S4 and a resistor R1 And a snubber circuit is formed by the capacitor C2. This snubber circuit generates noise generated when the contact portion S2 of the second mechanical contact switch 13 is turned on at time t1 when power is supplied from the AC power supply 2 to the load 3 And as a result, the malfunction of the triac S3 (see Fig. 6) can be suppressed. That is, by the snubber circuit, the hybrid relay 1 of the first embodiment does not cause malfunction of the triac S3, and supplies power from the AC power supply 2 to the load 3 at an appropriate timing .

After the contact point S2 of the second mechanical contact switch 13 is turned on at the time t1, the signal processing circuit 16 gives the drive current to the light emitting diode LD at time t2. Thus, in the phototriac coupler 15, the light emitting diode LD emits light, and the phototriac S4 receives the optical signal due to the light emission. The phototriac S4 has a function of zero-cross checking. When the phototriac S4 detects that the alternating voltage from the alternating-current power supply 2 becomes the reference voltage (time t3) as shown in Fig. 2 The liquid S4 is turned on.

An alternating current from the AC power supply 2 is applied to the resistor R2 and the phototriac S4 with respect to the parallel circuit composed of the resistor R1 and the capacitor C1 by the ON state of the photo- Lt; / RTI > As a result, a parallel circuit composed of the resistor R1 and the capacitor C1 is operated to supply a current to the gate electrode G of the triac S3 and the current T1 is applied to the T1 electrode-T2 electrode of the triac S3 And the interelectrode is turned on, that is, the triac S3 is turned on (time t3). The load 3 is electrically connected to the AC power supply 2 via the second mechanical contact switch 13 and the semiconductor switch 14 of the hybrid relay 1 so that the load 3 is supplied with the AC power (2).

At this time, since an inrush current flows from the alternating-current power supply 2 to the load 3, a large current based on the inrush current also flows in each of the turned-on triac S3 and the phototriac S4 Flows. This inrush current has a zero-cross switching function so that the timing at which the phototriacs S4 are turned on does not deviate from the period of the alternating-current voltage from the alternating-current power supply 2 Therefore, the deviation in the amount of current can be suppressed.

After the triac S3 is turned on at the time t3, the signal processing circuit 16 applies the pulse current, which becomes the drive current, to the magnetic coil L1 via the diode D3 at time t4. At this time, in the first mechanical contact switch 12, the diode D1 functions as a backflow prevention diode for preventing the current flowing in the magnetic coil L1 from flowing backward, and the current flows to the magnetic coil L2 through the diode D4).

As a result, a pulse current flows into the magnetic coil L1, and the electromagnetic attraction force acts temporarily, and the contact portion S1 of the first mechanical contact switch 12 is turned on (time t5). Further, since the first mechanical contact switch 12 is of the latching type, the contact portion S1 is maintained in the ON state even after the current supply to the magnetic coil L1 is stopped.

At time t5, the contact S1 of the first mechanical contact switch 12 is turned on so that the current from the AC power supply 2 flows to the contact S1 and the corresponding current . Therefore, at time t5, the T1 electrode-T2 electrode of the triac S3 is in the off state, that is, the triac S3 is in the off state, so that it is almost synchronized with the ON state of the contact S1 of the first mechanical contact switch 12. [ Off state. Since the contact portion S1 of the first mechanical contact switch 12 is in the ON state even after the time t5, the electric power from the AC power supply 2 to the load 3 is continuously supplied.

After the triac S3 is turned off at time t5, the signal processing circuit 16 stops supplying the drive current to the magnetic coil L3 of the second mechanical contact switch 13 at time t6. That is, since the supply of the current to the magnetic coil L3 is stopped, the second mechanical contact switch 13 of the normally energized type is disconnected from the second mechanical contact switch 13 due to the absence of electromagnetic attracting force by the magnetic coil L3, The contact portion S2 of the contact portion S2 is turned off. Further, the signal processing circuit 16 stops supplying the drive current to the light emitting diode LD also after time t5 (e.g., time t6).

Thus, the second mechanical contact switch 13 is turned off after the triac S3 is turned off. Therefore, the power supply circuit 13 composed of the second mechanical contact switch 13 and the semiconductor switch 14 The contact of the contact part S2 is turned off. Therefore, when the second mechanical contact switch 13 is turned off, generation of an arc between the contacts of the contact portion S2 can be prevented. Therefore, the contact of the second mechanical contact switch 13 So that welding can be prevented.

3. Shut off the power supply by the hybrid relay (1)

Next, the operation when the power supply is cut off in the hybrid relay 1 from the AC power supply 2 to the load 3 will be described with reference to the timing chart of Fig. 3 is a timing chart showing the operation timing of the hybrid relay 1 when the load 3 is turned off via the hybrid relay 1 of the first embodiment, that is, when the power supply to the load 3 is cut off A timing chart showing an example.

3, power is supplied from the AC power supply 2 to the load 3 immediately before the time t7, and the contact portion S1 of the first mechanical contact switch 12 is in the on state, It is assumed that the contact portion S2 of the contact switch 13 is in the OFF state and the semiconductor switch 14 including the triac S3 is in the OFF state.

The operation of each section in the hybrid relay 1 when the signal processing circuit 16 is instructed to interrupt the power supply from the AC power supply 2 to the load 3 will be described below. 3, the signal processing circuit 16 supplies the driving current to the magnetic coil L3 at time t7 when the AC power source 2 supplies power to the load 3 And outputs a signal to be used. An electromagnetic attracting force is generated in the magnetic coil L3 based on the drive current supplied in accordance with the signal and the contact portion S2 of the second mechanical contact switch 13 including the magnetic coil L3 is energized at time t8 As shown in Fig. The contact portion S2 of the second mechanical contact switch 13 is turned on at the time t8 and therefore the voltage between the contacts of the contact portion S2 is lowered as shown in Fig.

As described above, the semiconductor switch 14 is provided with a resistor R2 constituting the semiconductor switch 14, a capacitor C2 arranged in parallel with the series circuit of the photo-triac S4 and the resistor R1 ), A snubber circuit is formed. This snubber circuit is a circuit for detecting the noise generated when the contact portion S2 of the second mechanical contact switch 13 is turned on at time t8 when the power supply from the AC power supply 2 to the load 3 is interrupted (See FIG. 6) of the triac S3 can be suppressed. That is, by the snubber circuit, the hybrid relay 1 of the first embodiment can prevent the power supply from the AC power supply 2 to the load 3 from occurring at an appropriate timing .

After the contact portion S2 of the second mechanical contact switch 13 is turned on at the time t8, the signal processing circuit 16 outputs the pulse current to be the drive current at the time t9 via the diode D4 To the magnetic coil L2. At this time, in the first mechanical contact switch 12, the diode D2 functions as a reverse current prevention diode for preventing a current flowing in the magnetic coil L2 from flowing backward, and a current flowing through the magnetic coil L1 is detected by a diode D3). As a result, a pulse current flows in the magnetic coil L2, and electromagnetic attraction force acts temporarily, and the contact portion S1 of the first mechanical contact switch 12 is turned off (time t10).

At time t10, the contact S1 of the first mechanical contact switch 12 is turned off so that the current from the AC power supply 2 flows to the contact S2 of the second mechanical contact switch 13, The corresponding current flows through the semiconductor switch 14 including the liquid S3. Further, the signal processing circuit 16 supplies a driving current to the light-emitting diode LD at time t7. As a result, the voltage of the minute voltage is applied between the T1 electrode and the T2 electrode of the phototriac S4 before the time t9. Therefore, between the T1 electrode and the T2 electrode of the triac S3 is turned on at time t10 so as to be almost synchronized with the turn-off of the contact S1 of the first mechanical contact switch 12.

3, the driving current to the light emitting diode LD is supplied at the time t7. However, if a minute voltage is applied between the T1 electrode and the T2 electrode of the phototriac S4 before the time t9, The driving current to the light-emitting diode LD may be supplied at a different time point.

Since the contact portion S1 of the first mechanical contact switch 12 is turned off at time t10 but the contact portion S2 of the second mechanical contact switch 13 and the semiconductor switch 14 are also turned on, At time t10, electric power is continuously supplied from the alternating-current power supply 2 to the load 3.

After time t10, the signal processing circuit 16 stops supplying the drive current to the light emitting diode LD at time t11. This eliminates the irradiation of the photo-triac S4 with the optical signal from the light emitting diode LD. Therefore, when the alternating-current voltage from the alternating-current power supply 2 becomes the center voltage (time t12) The liquid S4 is turned off. In conjunction with the off state of the phototriac slurry S4, the triacol S3 is turned off, so that the semiconductor switch 14 is entirely turned off. Therefore, since the power supply path from the AC power supply 2 to the load 3 is cut off, the power supply to the load 3 by the AC power supply 2 is stopped.

The signal processing circuit 16 also stops supplying the drive current to the magnetic coil L3 at time t13 after stopping the supply of the drive current to the light emitting diode LD. That is, after the semiconductor switch 14 is turned off as a whole, the excitation by the magnetic coil L3 is stopped and the contact of the contact portion S2 of the second mechanical contact switch 13 is turned off. At this time, since the semiconductor switch 14 is already in the off state as a whole and no current flows through the second mechanical contact switch 13, even when the contact of the contact part S2 is turned off, It is possible to prevent the contact of the second mechanical contact switch 13 from being consumed.

In the hybrid relay 1 of the first embodiment, the resistance R2 of the semiconductor switch 14 and the capacitor C2 provided in parallel with the phototriac S4 are connected in series, Circuit is connected in parallel with the first mechanical contact switch 12. [

Thus, in the hybrid relay 1 of the first embodiment, only the capacitor C2 is newly provided, so that the number of parts is not increased more effectively than the case where the second mechanical contact switch 13 is turned on Occurrence of malfunctions of the semiconductor switch 14 and the load 3 can be effectively suppressed even when a noise component is included between the contacts of the second mechanical contact switch 13.

 (Modified Example 1 of the First Embodiment)

1, the snubber circuit of the hybrid relay 1 of the first embodiment includes a resistor R2 constituting the semiconductor switch 14, a phototriac S4 and a resistor R1, And a capacitor C2 that is connected in parallel with the series circuit of FIG. In order to reduce the number of components in the hybrid relay 1, the circuit configuration of the hybrid relay 1 of the first embodiment is preferable.

However, in the hybrid relay of the present invention, the snubber circuit described above is not limited to the example in which the resistor R2 and the capacitor C2 are formed. In Modification 1 of the first embodiment, another example of formation of the snubber circuit will be described with reference to Fig.

4 is a schematic circuit diagram showing the circuit configuration of the hybrid relay 1a of the first modification of the first embodiment. In the hybrid relay 1a shown in Fig. 4, the same reference numerals are assigned to the same parts as the circuit configuration of the hybrid relay 1 shown in Fig. Since the operation of each part given the same reference numeral is the same as that of each part of the hybrid relay 1 of the first embodiment, the description of the corresponding operation will be omitted.

In the hybrid relay 1a according to the first modification of the first embodiment, a snubber circuit is formed by a series circuit of a resistor R4 and a capacitor C4 which are arranged to be connected in parallel with the semiconductor switch 14a. That is, in the hybrid relay 1a according to the first modification of the first embodiment, the resistor R4 and the capacitor C4 are added in comparison with the hybrid relay 1 according to the first embodiment, thereby increasing the number of components. However, as in the case of the hybrid relay 1 of the first embodiment, even when the noise component is included between the contacts of the second mechanical contact switch 13 according to the ON state of the second mechanical contact switch 13, It is possible to effectively suppress the occurrence of malfunctions of the load 14a and the load 3. [

Specifically, the snubber circuit formed by the resistor R4 and the capacitor C4 is configured such that, at the time of power supply from the AC power supply 2 to the load 3, at the time t1, the second mechanical contact switch It is possible to suppress the occurrence of noise generated when the contact portion S2 of the transistor 13 is turned on and consequently to suppress the malfunction of the triac S3 (see Fig. 6). Similarly, at the time t8, the contact portion S2 of the second mechanical contact switch 13 is turned on in the same manner as in Fig. 3 when the power supply from the ac power supply 2 to the load 3 is interrupted (See FIG. 6) of the triac S3 can be suppressed as a result.

Although various embodiments have been described above with reference to the accompanying drawings, it is needless to say that the hybrid relays 1 and 1a of the present invention are not limited to the above examples. It will be understood by those skilled in the art that various changes and modifications can be made within the scope of the appended claims and that they are naturally also within the technical scope of the present invention.

For example, although the first mechanical contact switch 12 of the above-described embodiment is described as a latching type switch, it may be a normally-excited switch. In this case, since the magnetic coil of the first mechanical contact switch 12 needs to be supplied with a predetermined current from the signal processing circuit 16 continuously while power is being supplied to the load 3, The total amount of the driving current in the hybrid relay 1 is increased, but the structure of the hybrid relay 1 can be downsized as a whole.

Although the preferred embodiments of the present invention have been described, the present invention is not limited to these specific embodiments, and various changes and modifications may be made within the scope of the following claims, I can tell.

Claims (6)

A first mechanical contact switch whose contact is opened and closed by the first driving unit,
A second mechanical contact switch that opens and closes the contact by a second driving unit that is separate from the first driving unit,
And a semiconductor switch connected in series with the second mechanical contact switch,
A series circuit of the second mechanical contact switch and the semiconductor switch and the first mechanical contact switch are connected in parallel on a power supply path for supplying the power from the power supply,
Wherein the second mechanical contact switch and the semiconductor switch are electrically connected before the contact of the first mechanical contact switch is closed,
A snubber circuit is connected in parallel to the first mechanical contact switch,
The snubber circuit is formed by serially connecting a resistor constituting the semiconductor switch and a capacitor provided so as to be connected in parallel to the phototriacs constituting the semiconductor switch
And a hybrid relay.
delete delete The method according to claim 1,
Wherein the resistance constituting the snubber circuit is an internal surge resistance.
The method according to claim 1 or 4,
Wherein the second mechanical contact switch and the semiconductor switch are respectively turned on before switching on and off of the contacts of the first mechanical contact switch and after switching the contacts of the first mechanical contact switch, And a second relay.
The method according to claim 1 or 4,
Wherein the first mechanical contact switch is a latching mechanical contact switch to which a current is supplied to the first driver when a contact of the first mechanical contact switch is opened or closed.

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