KR101249638B1 - Hybrid relay and control terminal apparatus - Google Patents

Abstract

A first mechanical contact switch having a contact portion opened and closed by a first drive portion, a second mechanical contact switch having a contact portion opened and closed by a second drive portion operating independently from the first drive portion, and the second mechanical contact switch A hybrid relay having a semiconductor switch connected in series with is provided. The first mechanical contact switch is connected in parallel with a series circuit by the second mechanical contact switch and the semiconductor switch on a power supply path from a power supply to a load. The first mechanical contact switch is a latch-type mechanical contact switch in which current is supplied to the first drive unit when the contact portion of the first mechanical contact switch is switched between an open state and a closed state. The second mechanical contact switch and the semiconductor switch are each turned on before switching of the opening and closing of the contact portion of the first mechanical contact switch, and each of the second mechanical contact switch and the semiconductor switch is turned off after switching of the opening and closing of the contact portion of the first mechanical contact switch.

Description

HYBRID RELAY AND CONTROL TERMINAL APPARATUS

The present invention relates to a hybrid relay having a mechanical contact switch and a semiconductor switch, and a control terminal device having the same.

Conventionally, in order to switch supply and interruption of electric power to the load provided with the inverter circuit which performs inverter control, such as a lighting fixture, the hybrid relay provided with the mechanical contact switch and semiconductor switch connected in parallel was used. In addition, a large capacity smoothing capacitor is provided in a load having an inverter circuit so as to convert an AC voltage into a DC voltage, and a large current flows into the smoothing capacitor when power is supplied from the AC power supply to the load. surge current) occurs. In particular, under the condition of high power supply voltage and high load, the inrush current flowing into the load increases, so that a large current based on this inrush current also flows in the hybrid relay connected between the load and the AC power supply.

For this reason, in the hybrid relay connected to such a load, first, only the semiconductor switch is turned on (closed), and the inrush current flows through the semiconductor switch, and then the mechanical contact is made when the current supplied to the load is in a normal state. The switch is turned on (refer patent document 1). By operating in this way, it is possible to suppress a large current from flowing through the mechanical contact switch in the hybrid relay, thereby avoiding contact fusion due to the occurrence of an arc immediately before the contact of the contact pair of the mechanical contact switch. can do.

As described above, the hybrid relay has a structure including a semiconductor switch in order to prevent contact welding in the mechanical contact switch, and turns off the mechanical contact switch and turns on the semiconductor switch to start supplying power to the load. In addition, before turning on the mechanical contact switch (called "first switch"), a hybrid relay having a configuration in which a mechanical contact switch (called "second switch") for turning on the semiconductor switch is further added is proposed. (See patent document 2).

In the hybrid relay of Patent Literature 2, the first and second switches are always-on mechanical contact switches in the " off " state unless they are driven, and the magnetic coils used in each are common. By varying the distance between the contacts of each of the first and second switches, the opening and closing timing of each of the first and second switches is set so that the second switch is turned on before the first switch. Therefore, the distance between the contacts of each of the first and second switches and the design of the magnetic coil need to be executed accurately, and the manufacturing work is complicated.

In addition, since the first and second mechanical contact switches are always excited, the current supply to the magnetic coil is always required while the first and second switches are turned on. Therefore, as in the hybrid relay of Patent Literature 2, the configuration using the mechanical contact switch of the always-excited type as the first and second switches is required to continuously supply power to the second switch when power is supplied to the load, thereby saving power. Interfere with anger.

In addition, the semiconductor switch may be turned on only at the time of opening and closing of the first switch so as to prevent arc generation causing contact welding of the first switch, and the second switch may be turned off after the first switch is switched from off to on. . However, since the magnetic coils for opening and closing the first and second switches are common in Patent Document 2, the second switch is also turned on while the first switch is turned on. Since the contacts of both the first and second switches are magnetically contacted by a common magnetic coil, it is necessary to generate a magnetic force larger than the combined repulsion force caused by the spring load of each of the first and second switches. And increase in power consumption.

Japanese Patent Application Laid-Open No. 11-238441 Japanese Patent Publication No. 05-054772

In view of such a problem, the present invention is a latch type mechanical contact switch provided on a power supply path to a load, and the mechanical contact switch and the semiconductor switch connected in series only when the latch mechanical contact switch is opened and closed. By operating, a hybrid relay capable of realizing low power consumption is provided.

According to a first aspect of the present invention, a second mechanical contact switch having a first mechanical contact switch having a contact portion opened and closed by a first drive portion and a contact portion opened and closed by a second drive portion operating independently from the first drive portion And a semiconductor switch connected in series with the second mechanical contact switch.

The first mechanical contact switch is connected in parallel with a series circuit by the second mechanical contact switch and the semiconductor switch on a feed path from a power supply to a load, and the first mechanical contact switch is connected to the first mechanical contact. A latch-type mechanical contact switch in which a current is supplied to the first drive unit at the time of switching the opening and closing of the contact section of the switch, wherein the second mechanical contact switch and the semiconductor switch are switching of opening and closing of the contact section of the first mechanical contact switch. Each conducts before, and becomes non-conductive after switching between opening and closing of the contact portion of the first mechanical contact switch.

When each of the second mechanical contact switch and the semiconductor switch is turned on, the semiconductor switch is turned on after closing the contact portion of the second mechanical contact switch, and each of the second mechanical contact switch and the semiconductor switch is turned off. In this case, the contact portion of the second mechanical contact switch may be opened after the semiconductor switch is turned off.

It is preferable that the said power supply is an alternating current power supply, and the said semiconductor switch is a semiconductor switch with a zero-cross firing function which conducts when the voltage supplied from the said alternating current power becomes a center voltage. According to this configuration, when the semiconductor switch conducts, the inrush current from the power supply to the load can always be controlled regardless of the conduction timing of the semiconductor switch.

When each of the second mechanical contact switch and the semiconductor switch is non-conductive, after the time when the semiconductor switch becomes non-conducting and becomes equal to or more than half a period of the AC voltage from the AC power supply, the contact of the second mechanical contact switch is The part may be opened. According to this configuration, in the case where the triac is used as the semiconductor switch, the contact portion of the second mechanical contact switch can be opened after the triac is certainly non-conductive. Accordingly, the power supply can be prevented from being cut off by the second mechanical contact switch.

In the case where the contact portion of the first mechanical contact switch is closed, the semiconductor switch is turned on after closing the contact portion of the second mechanical contact switch, and in the state where each of the second mechanical contact switch and the semiconductor switch is in conduction, the The second mechanical contact switch when closing the contact of the first mechanical contact switch, substantially simultaneously opening the contact of the second mechanical contact switch, de-energizing the semiconductor switch, and opening the contact of the first mechanical contact switch. Conducting the semiconductor switch at substantially the same time as closing the contact point of the contact, opening the contact of the first mechanical contact switch with each of the second mechanical contact switch and the semiconductor switch conducting, and then turning off the semiconductor switch. After opening the contact of the second mechanical contact switch You may.

The second mechanical contact switch is an always-excited mechanical contact switch in which current is always supplied to the second drive unit while the contact of the second mechanical contact switch is closed, and the semiconductor switch is configured to emit light to generate an optical signal. A photo-coupler having a device and controlled to conduction and non-conduction based on an optical signal of the light emitting device, wherein the second driver and the light emitting device are connected in series, and the second mechanical contact switch And the second driving unit and the light emitting element may be driven by a common current when the semiconductor switches are brought into conduction at the same time.

In the case where the second mechanical contact switch and the semiconductor switch are each electrically connected from the non-conductive state at the same time, a first current is supplied to each of the light emitting element and the second driver, and the second mechanical contact switch is conducted. When the second mechanical contact switch and the semiconductor switch are electrically conducted while in the state, the second current having a smaller current amount than the first current may be supplied to each of the light emitting element and the second driver. have.

When closing the contact of the second mechanical contact switch, after supplying a first current to the second drive unit and closing the contact of the second mechanical contact switch, the amount of current is greater than the first current in the second drive unit. It is preferable to flow a 2nd electric current.

The second mechanical contact switch is a latch type mechanical contact switch, and preferably supplies current to the second drive unit only when the contact of the second mechanical contact switch is opened or closed.

Preferably, the contact pressure of the second mechanical contact switch is smaller than the first mechanical contact switch contact pressure, and the distance between the contacts of the second mechanical contact switch is shorter than the distance between the contacts of the first mechanical contact switch.

A magnetic circuit may be formed in a contact terminal provided with the contact of the first mechanical contact switch to generate magnetic attraction in a direction in which the contact is closed when the contact is closed and a short circuit current flows.

The first mechanical contact switch has an auxiliary contact interlocked with the contact of the first mechanical contact switch, and based on opening and closing of the auxiliary contact, conduction or non-conduction by a contact of the first mechanical contact switch is detected. It may be.

According to the second aspect of the present invention, in the case of having a plurality of the hybrid relays described above and switching opening and closing at the contacts of the first mechanical contact switch of each of the plurality of hybrid relays simultaneously, A control terminal apparatus for performing switching operation of opening and closing at a contact point of a first mechanical contact switch is provided.

According to the invention, the first mechanical contact switch and the second mechanical contact switch each have a first and a second drive part, and the first and second drive parts respectively open and close the contacts of the first and second mechanical contact switch. And provided separately from each other, since the first mechanical contact switch is configured in a latch type, each driving unit can be driven only when the switching of the contact of the first mechanical contact switch. That is, the second mechanical contact switch and the semiconductor switch are driven only when switching between on and off of the first mechanical contact switch, and the first mechanical contact switch only when switching the opening and closing of the first mechanical contact switch. The driving current may be supplied to the driving unit.

Therefore, by providing a 2nd mechanical contact switch and a semiconductor switch, the power consumption in a hybrid relay can be reduced and contact welding at the time of opening and closing of a 1st mechanical contact switch can be prevented.

The objects and features of the present invention will become apparent from the following description of the preferred embodiments given in conjunction with the accompanying drawings.
1 is a schematic circuit diagram showing an internal configuration of a hybrid relay according to a first embodiment of the present invention.
FIG. 2 is a timing chart showing the state transition of each part in the hybrid relay shown in FIG.
FIG. 3 is a timing chart showing the relationship between the state of each part in the hybrid relay shown in FIG. 1 and the AC voltage from the AC power supply.
It is a schematic perspective view which shows an example of the contact part in a latch type mechanical contact switch.
FIG. 5 is a schematic cross-sectional view showing a state when the contact portion of the configuration shown in FIG. 4 is conducted.
6 is a schematic cross-sectional view showing an example of a contact portion in a mechanical contact switch of an always-excited type.
7 is a schematic view showing one configuration example of a triac.
8 is a schematic view showing another configuration example of the triac.
9 is a schematic view showing another configuration example of the triac.
10 is a schematic circuit diagram showing an internal configuration of a hybrid relay according to a second embodiment of the present invention.
FIG. 11 is a timing chart showing a state transition of each part in the hybrid relay shown in FIG. 10.
It is a timing chart which shows the state transition of each part in the hybrid relay which concerns on 3rd Embodiment of this invention.
It is a schematic circuit diagram which shows the internal structure of the hybrid relay which concerns on 4th Embodiment of this invention.
FIG. 14 is a timing chart showing a state transition of each part in the hybrid relay shown in FIG.
15 is a schematic circuit diagram showing an internal configuration of a hybrid relay according to a fifth embodiment of the present invention.
FIG. 16 is a timing chart showing a state transition of each unit in the hybrid relay shown in FIG. 15.
17 is a schematic circuit diagram showing an internal configuration of a hybrid relay according to a sixth embodiment of the present invention.
FIG. 18 is a timing chart showing a state transition of each unit in the hybrid relay shown in FIG. 17.

(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 an internal configuration of a hybrid relay of the present embodiment, and FIG. 2 is a timing chart showing a state transition in each part of the hybrid relay of FIG. 1.

1. Configuration of Hybrid Relay

As shown in FIG. 1, the hybrid relay 1 of the present embodiment is connected to one end of each of the AC power supply 2 and the load 3 connected in series, whereby the AC power supply 2 and the load 3. And form a closed circuit. That is, the supply and interruption of the power supply from the AC power supply 2 to the load 3 are determined by the on / 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, and the load 3 is, for example, a lighting device or a fan including a fluorescent lamp or an incandescent lamp.

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

The circuit configuration of the hybrid relay 1 according to the present embodiment will be described in more detail below. 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 first mechanical contact switch 12 of the The contact portion S1 is connected in parallel between the terminals 10 and 11. The first mechanical contact switch 12 is a latch-type mechanical contact switch, and the magnetic coil L1 for generating an electromagnetic force for switching the contact portion S1 to ON (closed) and the contact portion S1 are turned OFF ( The magnetic coil L2 which generates an electromagnetic force for switching to the opening) is provided. On the other hand, the second mechanical contact switch 13 is an always-excited mechanical contact switch, and includes a magnetic coil L3 that generates an electromagnetic force for holding the contact portion S2 ON (closed). That is, the magnetic coils L1 and L2 constitute the first drive portion of the first mechanical contact switch 12, and 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 with the anode electrode to the signal processing circuit 16, while the magnetic coil ( One end of L2 is connected to the cathode of the diode D4 whose anode electrode is connected to the signal processing circuit 16. The other ends of the magnetic coils L1 and L2 are connected to each other, and the connection nodes of the magnetic coils L1 and L2 are grounded (hereinafter, "ground" in the description of each embodiment including the present embodiment is Means to be connected to a reference voltage in the hybrid relay.) And to the anode electrodes of the diodes D1 and D2, respectively. In addition, the cathode electrodes of each of the diodes D1 and D2 are connected to the cathode electrodes of the diodes D3 and D4, respectively.

In this way, the first mechanical contact switch 12 includes the magnetic coils L1 and L2 connected in series, the diodes D1 and D2 to which the anode electrodes are connected, and the anode electrode is connected to the signal processing circuit 16. It is comprised by the diodes D3 and D4. On the other hand, the 2nd mechanical contact switch 13 is comprised by one magnetic coil L3 and the diode D5 connected in parallel with this magnetic coil L3. Then, one end of the magnetic coil L3 and the connection node of the anode electrode of the diode D5 are grounded, and the other end of the magnetic coil L3 and the connection node of the cathode electrode of the diode D5 are connected to the signal processing circuit ( 16).

The semiconductor switch 14 also includes a resistor R1 and a capacitor C1 connected in parallel between the triac S3, the T2 electrode of the triac S3, and the gate electrode, and the triac S3. The phototriac coupler 15 includes a resistor R2 having one end connected to the T1 electrode, and a phototriac S4 having a T1 electrode connected to the other end of the resistor R2. The phototriac 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 thereto, and further comprising a T2 electrode. An optical signal from the light emitting diode LD is incident on the phototrial solution S4 connected to the gate electrode of the triac S3. In addition, the phototriac S4 is a semiconductor switching element having a zero-cross firing function, and while the optical signal from the light emitting diode LD is incident, the AC power source 2 is connected to the T2 electrode side. When the center voltage (reference voltage) of the alternating voltage is detected, conduction (ON) starts. The triac S4 remains turned on after the light emitting diode LD is turned off until the center voltage is detected again.

2. Power supply by hybrid relay

In the hybrid relay 1 configured as described above, each operation at the time of supplying power to the load 3 from the AC power supply 2 and cutting off will be described below with reference to the timing chart of FIG. 2. First, when the signal processing circuit 16 is instructed to supply power from the AC power supply 2 to the load 3, the operation of each part in the hybrid relay 1 will be described. As shown in the timing chart of FIG. 2, when a drive current is supplied from the signal processing circuit 16 to the magnetic coil L3, an magnetic magnetic force is generated by the magnetic coil L3. The contact portion S2 constituting the second mechanical contact switch 13 together with the magnetic coil L3 is turned on. In addition, the diode D5 connected in parallel with the magnetic coil L3 functions as a backflow prevention diode for preventing the current flowing through the magnetic coil L3 from flowing back.

In this way, when the contact portion S2 of the second mechanical contact switch 13 is turned on, the signal processing circuit 16 next applies a driving current to the light emitting diode LD. As a result, in the phototriac coupler 15, the light emitting diode LD emits light, and the phototriac S4 receives the light signal by the light emission. At this time, since the phototriac S4 has a zero cross firing function, as shown in the timing chart of Fig. 3, when the center voltage (reference voltage) of the AC voltage from the AC power source 2 is detected, The photo triac S4 is brought into a conduction state ON. 3 is a timing chart showing the relationship between the AC voltage from the AC power supply 2 and the operating states of the respective parts in the first and second mechanical contact switches 12 and 13 and the semiconductor switch 14. .

By the conduction of the phototriac S4, the alternating current from the AC power supply 2 passes through the resistor R2 and the phototriac S4 to the parallel circuit by the resistor R1 and the capacitor C1. Flow. Thereby, the parallel circuit by the resistor R1 and the condenser C1 is operated, a current is supplied to the gate electrode of the triac S3, and the triac S3 is turned on. As a result, the load 3 is electrically connected to the AC power supply 2 via the second mechanical contact switch 13 and the semiconductor switch 14 in the hybrid relay 1, so that the load 3 Power by the power source 2 is supplied.

At this time, since the inrush current flows from the AC power supply 2 to the load 3, even in each of the triac S3 and the phototriac S4 which are in a conductive state, a large current based on this inrush current Will flow. This inrush current has a zero-cross firing function of the phototriac S4 so that the timing at which the phototriac S4 conducts becomes uneven with respect to the period of the alternating voltage from the alternating current power supply 2. Therefore, the variation in the amount of current can be suppressed. Moreover, although this inrush current flows into the contact part S2 of the 2nd mechanical contact switch 13, since it flows in the closed state in the contact part S2, the arc at the time of switching of a contact opening and closing of There is no occurrence, and contact consumption by contact welding etc. in this 2nd mechanical contact switch 13 can be prevented.

In this way, after the triac S3 in the semiconductor switch 14 is turned on and the power from the AC power supply 2 is supplied to the load 3, the signal processing circuit 16 receives a pulse current that becomes a driving current. It is given to the magnetic coil L1 via D3). At this time, in the first mechanical contact switch 12, the diode D1 functions as a backflow prevention diode that prevents the current flowing through the magnetic coil L1 from flowing back, and the diode (the current flowing through the magnetic coil L2). D4) prevent. Thereby, a pulse electric current flows into the magnetic coil L1, magnetic attraction acts temporarily, and the contact part S1 in the 1st mechanical contact switch 12 is turned on. In addition, since the first mechanical contact switch 12 is of a latch type, as shown in FIG. 2, the contact portion S1 remains on even after the current supply to the magnetic coil L1 is lost.

In this way, after the power supply path from the AC power supply 2 to the load 3 is secured by the second mechanical contact switch 13 and the semiconductor switch 14, the first mechanical contact switch 12 is turned on. Inrush current can be prevented from flowing into the contact portion S1. Therefore, in the 1st mechanical contact switch 12, contact bounce based on inrush current which becomes a factor of contact welding can be prevented. Then, when the power supply to the load 3 by the AC power supply 2 via the contact portion S1 of the first mechanical contact switch 12 is started, the power supply path in the semiconductor switch 14 is cut off. In order to do this, the signal processing circuit 16 stops the supply of the drive current to the light emitting diode LD. For this reason, since the light emission operation | movement of the light emitting diode LD stops and irradiation of the optical signal to the phototriac S4 is stopped, the alternating voltage from the alternating current power source 2 is centered on the phototriac S4. When the voltage (reference voltage) is reached, the operation is stopped, and the state is turned off (OFF).

When the phototriac S4 is turned off, since the current supply is lost to the gate electrode of the triac S3, the triac S3 is in a non-conductive state, and the semiconductor switch 14 is turned off. After the semiconductor switch 14 is turned off, the signal processing circuit 16 stops the supply of the drive current to the magnetic coil L3 of the second mechanical contact switch 13. That is, since the current supply to the magnetic coil L3 is stopped, the always-excited second mechanical contact switch 13 loses magnetic attraction by the magnetic coil L3, and the contact portion S2 is turned off. Accordingly, since the second mechanical contact switch 13 is turned off after the semiconductor switch 14 is turned off, the second mechanical contact switch 13 opens the contact of the contact portion S2 in a state where no current is flowing. do. 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, and contact welding in the second mechanical contact switch 13 can be prevented. Can be.

In this way, when the power supply from the AC power supply 2 to the load 3 is performed, the signal processing circuit 16 shows each timing for supplying driving currents of the magnetic coil L3 and the light emitting diode LD. By performing in this manner, as described above, contact consumption due to contact welding in the second mechanical contact switch 13 can be prevented. In other words, when an AC voltage having a period T is supplied from the AC power supply 2, the time from when the supply of the drive current to the light emitting diode LD is stopped and the supply of the drive current to the magnetic coil L3 is stopped. Let t2 be a time longer than half period T / 2 of an alternating voltage.

Thereby, by turning off the photo triac S4 of the photo triac coupler 15, after turning off triac S3 completely, the 2nd mechanical contact switch 13 can be turned off. In addition, since the phototriac S4 in the phototriac coupler 15 has a zero-cross firing function, the variation of the inrush current when the triac S3 is turned on can be suppressed. The time t1 from the start of the supply of the drive current to the coil L3 and the start of the supply of the drive current to the light emitting diode LD is a time longer than the half period T / 2 of the AC voltage, whereby the deviation of the inrush current is determined. You may be able to suppress more reliably.

3. Power off by hybrid relay

On the other hand, when the contact portion S1 of the first mechanical contact switch 12 is turned on and power is supplied from the AC power supply 2 to the load 3, the load 3 is applied to the signal processing circuit 16. When the power supply to () is instructed, the signal processing circuit 16 supplies a drive current to the magnetic coil L3 as shown in the timing chart of FIG. As a result, the contact portion S2 in the second mechanical contact switch 13 is turned on as in the case of supplying power to the load 3. After that, when time t1 elapses, the signal processing circuit 16 supplies a driving current to the light emitting diode LD. Since the light emitting diode LD emits light and irradiates an optical signal to the phototriac S4, the phototriac S4 conducts when the alternating voltage from the alternating current power source 2 becomes the center voltage (reference voltage). Then, the triac S3 conducts and the semiconductor switch 14 is turned on.

Accordingly, the power supply path via the first mechanical contact switch 12 and the power supply path via the second mechanical contact switch 13 and the semiconductor switch 14 as the power supply path from the AC power supply 2 to the load 3. Is formed in the hybrid relay 1. That is, since the feed path through the second mechanical contact switch 13 and the semiconductor switch 14 is secured, a part of the current flowing in the load 3 is transferred to the second mechanical contact switch 13 and the semiconductor switch 14. The amount of current flowing through the first mechanical contact switch 12 can be reduced. Further, since the semiconductor switch 14 is turned on after the second mechanical contact switch 13 is turned on, generation of an arc in the contact portion S2 can be avoided, whereby the second mechanical contact switch ( Contact consumption by contact welding in 13) can be prevented.

Thereafter, the signal processing circuit 16 applies the pulse current which becomes the drive current to the magnetic coil L2 via the diode D4, and temporarily excites the magnetic coil L2 to thereby close the contact portion S1. Switch off. At this time, since the contact portion S1 opens the contact in a state where the amount of current decreases, the generation of the arc can be suppressed and the contact consumption in the first mechanical contact switch 12 can be prevented due to contact welding or the like. can do. In the first mechanical contact switch 12, the diode D2 functions as a backflow prevention diode that prevents the current flowing through the magnetic coil L2 from flowing back. D3) prevent.

In this way, when the contact portion S1 in the first mechanical contact switch 12 is turned off, first, the signal processing circuit 16 stops the supply of the drive current to the light emitting diode LD. As a result, since the irradiation of the optical signal from the light emitting diode LD is eliminated by the phototriac S4, when the alternating voltage from the AC power supply 2 becomes the center voltage (reference voltage), the phototriac ( S4) is turned off. Since the triac S3 becomes nonconductive in conjunction with the nonconductivity of the phototriac S4, the semiconductor switch 14 is turned off. Therefore, since the power supply path from the AC power supply 2 to the load 3 is interrupted, the power supply to the load 3 by the AC power supply 2 is stopped.

The signal processing circuit 16 stops the supply of the drive current to the magnetic coil L3 when time t2 elapses after the supply of the drive current to the light emitting diode LD is stopped. That is, after the semiconductor switch 14 is turned off, the excitation by the magnetic coil L3 is stopped and the contact of the contact portion S2 is opened, whereby the second mechanical contact switch 13 is turned off. At this time, since the semiconductor switch 14 is already off and no current flows through the second mechanical contact switch 13, no arc is generated even if the contact of the contact portion S2 is opened. Contact consumption can be prevented.

4. Configuration example of contact portion S1 in first mechanical contact switch 12

A configuration example of the contact portion S1 of the first mechanical contact switch 12 included in the hybrid relay 1 as described above will be described with reference to FIG. 4. As shown in FIG. 4, the contact portion S1 has a fixed contact terminal 101 having one end fixed thereto, and one end fixed thereto, and a movable contact terminal whose other end is displaced by a driving member (not shown). It is comprised by 102. Each of the fixed contact terminal 101 and the movable contact terminal 102 is formed of a conductor material, and the movable contact terminal 102 also allows the other end to be displaced when pressed by a driving member (not shown). It is formed of a conductive material having properties. At the other end of the fixed contact terminal 101, the fixed contact 103 is convexly provided on the surface facing the movable contact terminal 102, and the fixed contact is provided at the other end of the movable contact terminal 102. On the surface facing the terminal 101, the movable contact 104 is provided convexly.

In addition, between one end of the fixed contact terminal 101 and the fixed contact 103, a fixed iron piece having a U-shaped cross section covering the opposite side of the surface on which the fixed contact 103 is provided and both sides of the fixed contact terminal 101. 105 is mounted. The pressing part 107 is provided in the surface on the opposite side to the surface in which the movable contact 104 of the movable contact terminal 102 was provided. The pressing portion 107 extends from the other end of the movable contact terminal 102 toward one end of the fixed contact terminal 101 along the extending installation direction of the fixed contact terminal 101. Further, between the fixed contact terminal 101 and the pressing portion 107 of the movable contact terminal 102, the movable iron piece 106 is placed on the pressing portion 107 at a position in contact with both ends of the fixed iron piece 105. ) Is installed. And both ends of the fixed iron piece 105 protrude toward the movable iron piece 106 from the surface which faces the movable contact terminal 102 of the fixed contact terminal 101. In addition, each of the fixed iron piece 105 and the movable iron piece 106 is formed of a magnetic material.

As for the contact part S1 comprised in this way, when the movable contact terminal 102 is pressed by the drive member which is not shown in figure, the other end of the movable contact terminal 102 is directed toward the other end of the fixed contact terminal 101. FIG. 5, the movable contact 104 is brought into contact with the fixed contact 103 as shown in FIG. At this time, since the movable iron piece 106 is pressed by the pressing section 107 of the movable contact terminal 102, the movable iron piece 106 is moved together with the movable contact 104 in the movable contact terminal 102. Displace toward the fixed contact terminal 101.

Therefore, when the fixed contact 103 and the movable contact 104 come into contact with each other, and the contact portion S1 conducts, the fixed iron piece 105 and the movable iron piece 106 come into contact with each other, whereby a magnetic body that turns around the outer circumferential side is formed. It is formed around the fixed contact terminal 101. That is, a ring-shaped magnetic body formed by the fixed iron piece 105 and the movable iron piece 106 is formed so as to wind the current flowing through the fixed contact terminal 101. For this reason, concentric inductive magnetic flux centering on the electric current which flows through the fixed contact terminal 101 generate | occur | produces in the fixed iron piece 105 and the movable iron piece 106. As shown in FIG. By the generation of the induced magnetic flux, the fixed iron piece 105 and the movable iron piece 106 are attracted to each other.

Further, when the fixed contact 103 and the movable contact 104 are brought into contact with each other in the contact portion S1, the current flowing through each of the fixed contact 103 and the movable contact 104 becomes parallel in the reverse direction. Between the fixed contact terminal 101 and the movable contact terminal 102, a repulsive magnetic force is generated. On the other hand, by setting it as the structure provided with the fixed iron piece 105 and the movable iron piece 106 as shown in FIG. 4, magnetic attraction by the fixed iron piece 105 and the movable iron piece 106 generate | occur | produces, The magnetic repulsion by the antiparallel current flowing through the fixed contact 103 and the movable contact 104 is canceled out. Thereby, not only the contact bounce in the contact part S1 can be suppressed, but the 1st drive part which displaces the movable contact terminal 102 containing magnetic coils L1 and L2 can be made small, The mechanical contact switch 12 itself can also be miniaturized.

5. Configuration example of contact portion S2 in the second mechanical contact switch 13

Next, the structural example of the contact part S2 of the 2nd mechanical contact switch 13 is demonstrated with reference to drawings. As for the contact part S2 of this 2nd mechanical contact switch 13, the distance between contacts is shorter than the distance between the contacts of the contact parts S1 of the 1st mechanical contact switch 12, and a contact pressure is 1st mechanical type. It is smaller than the contact pressure of the contact portion S1 of the contact switch 12. As a result, the number of coils of the magnetic coil L3 of the second mechanical contact switch 13 can be reduced, and the magnetic coil L3 can be miniaturized. Moreover, since the contact part S2 can also be miniaturized by setting the contact part S2 to each structure shown in Japanese Patent Application No. 2007-166523 by this applicant, the 2nd mechanical contact switch 13 itself can be miniaturized. Can be.

The example of a structure of the contact part S2 of this 2nd mechanical contact switch 13 is shown in FIG. In addition, although the example shown in FIG. 6 is demonstrated below, if it can be miniaturized, the magnetic coil L3 is formed, for example by forming the 2nd drive part in Japanese Patent Application No. 2007-166523 by a piezoelectric element or a shape memory alloy. It is good also as another structure, such as the structure which can abbreviate | omit. First, the structure of the contact part S2 shown in FIG. 6 is demonstrated below. The contact portion S2 shown in FIG. 6 includes two fixed contact terminals 201 and 202 formed of a conductor material and a movable contact member made of a conductor material that can be contacted over the two fixed contact terminals 201 and 202. 203 and a drive member 204 made of an insulating material that presses the movable contact member 203 toward the fixed contact terminals 201 and 202.

Each of the fixed contact terminals 201 and 202 and the movable contact member 203 is formed by a conductor plate, and the fixed contact terminals 201 and 202 are arranged so that the bottom of the housing 205 does not contact each other. . In addition, the movable contact member 203 is supported by the housing 205 by one end of the substantially inverted U-shaped bent portion 206 provided in the four corners, and when there is no pressure by the drive member 204, the housing 205. In the hollow inside, it is arrange | positioned in the position separated from the fixed contact terminals 201 and 202. In addition, since the housing 205 is formed of an insulating material, when there is no pressurization by the drive member 204, the fixed contact terminals 201 and 202 and the movable contact member 203 are insulated from each other.

As for the contact part S2 comprised in this way, when the movable contact member 203 is pressed by the drive member 204, the movable contact member 203 will be fixed by the flexible part of the bending part 206, and the center part will be a fixed contact terminal. Displace toward 201 and 202. As a result, since the movable contact member 203 is in contact with the fixed contact terminals 201 and 202, the movable contact member 203 spans the fixed contact terminals 201 and 202. Therefore, since the fixed contact terminal 201 can be electrically connected to the fixed contact terminal 202 via the movable contact member 203, the contact portion S2 is in a conductive state.

6. Structure example of triac (S3) and phototriac (S4)

In addition, the structure of triac S3 and phototriac S4 is demonstrated below with reference to FIGS. In addition, below, although the structure of the triac S3 is demonstrated based on the internal structure of the triac S3 shown to FIGS. 7-9, about the phototriac S4 except the structure of a gate electrode. The same configuration can be realized.

First, the triac S3 shown in FIG. 7 is a bidirectional controlled rectification type in which a T1 electrode 301 and a gate electrode 302 are provided on a surface layer, and a T2 electrode (not shown) is provided on a back layer. A semiconductor chip 300 is provided. The semiconductor chip 300 is solder-connected to the lead frame 304 so that the entire back surface side constituting the T2 electrode is brought into contact with the surface of the lead frame 304 having the second lead terminal 304a as a part. The lead frame 304 in which the T2 electrode on the back surface side of the semiconductor chip 300 is connected on the surface thereof is joined to the stay 303 serving as the heat dissipation portion 303a by solder, and the current is conducted. The heat on the back surface (T2 electrode) side of the semiconductor chip 300 at the time of heat dissipates.

In addition, the semiconductor chip 300 has two linear wires (30 lb), each of which has the other end thereof ultrasonically connected to the first lead terminal 301a, to the T1 electrode 301 on the surface side thereof. One end of each is ultrasonically connected. One end of the linear wire 302b whose other end is ultrasonically connected to the gate lead terminal 302a is ultrasonically connected to the gate electrode 302. In addition, on the surface side of the semiconductor chip 300, the T1 electrode 301 is formed in a substantially rectangular shape with one corner removed, and at the removed corner, the T1 electrode 301 as a boundary with the T1 electrode 301. A gate electrode 302 having an outer peripheral portion insulated from the gate electrode 302 is formed.

Thus, since the gate electrode 302 is connected by one linear wire 302b, and the T1 electrode 301 is connected by two linear wires 30lb, the connection area in the T1 electrode 301 is gated. It is larger than the connection area in the electrode 302. At this time, the connection area can be further widened by making two or more connection points with the T1 electrode 301 by ultrasonic connection into each of the two linear wires 30lb. In addition, since the rear side of the semiconductor chip 300 is in surface-connected state with the lead frame 304, the gate electrode 302 also relates to the connection area with the lead frame 304 in the T2 electrode (not shown). It is wide compared with the connection area with the linear wire 302b in the process.

Therefore, even when the inrush current flows through the triac S3, the area of the junction portion is large in the T1 electrode 301 and the T2 electrode 302 of the triac S3, so that the current is dispersed in the junction portion. do. Accordingly, in the triac S3, dielectric breakdown due to local current concentration can be prevented, and as a result, the durability of the inrush current of the triac S3 can be improved. In addition, in order to prevent the dielectric breakdown by this local current concentration, three or more linear wires 30lb may be connected to the T1 electrode 301, and the ribbon-shaped wire whose cross section is larger than the linear wires 30lb. It may be connected by connecting.

In addition, as shown in FIG. 8, the triac S3 is bonded to the T1 electrode 301 to which two linear wires 30lb are connected, and the block-shaped heat dissipation block 310 whose cross-sectional shape is almost trapezoidal is joined. The heat radiation efficiency of the T1 electrode can be improved. Therefore, when the inrush current flows through the triac S3, the temperature rise due to the inrush current can be suppressed. As a result, the resistance regarding the inrush current of the triac S3 can be improved. In addition, as shown in FIG. 9, in order to increase the junction area at the T1 electrode 301 and to improve the heat dissipation effect, the lead frame 301c having the first lead terminal 301a instead of the linear wire 30lb is T1. It is good also as a solder connection to the electrode 301.

(Second Embodiment)

A hybrid relay according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 10 is a schematic circuit diagram showing an internal configuration of a hybrid relay of the present embodiment, and FIG. 11 is a timing chart showing a state transition in each part of the hybrid relay of FIG. 10. In addition, in the hybrid relay of FIG. 10, the same code | symbol is attached | subjected about the part same as the structure in the hybrid relay of FIG. 1, and the detailed description is abbreviate | omitted.

As shown in FIG. 10, the hybrid relay 1a of the present embodiment includes the magnetic coil L3 of the second mechanical contact switch 13 and the phototriac coupler 15 serving as part of the semiconductor switch 14. By connecting the light emitting diodes LD in series, the amount of driving current is reduced as compared with the hybrid relay 1 (see Fig. 1) of the first embodiment. In other words, the signal processing circuit 16a is provided in place of the signal processing circuit 16 in the hybrid relay 1, and the other end of the resistor R3 having one end connected to the signal processing circuit 16a. One end of the magnetic coil L3 is connected to the anode, and the anode electrode of the light emitting diode LD is connected to the other end of the magnetic coil L3.

In addition, the diode D5 connected to both ends of the magnetic coil L3 to prevent the reverse flow of the magnetic coil L3 has a cathode electrode connected to the resistor R3, and an anode electrode of the light emitting diode LD. It is connected with the anode electrode. The hybrid relay 1a has a resistor R4 having one end connected to an anode electrode of the light emitting diode LD and a connection node of the magnetic coil L3, and one end thereof to a cathode electrode of the light emitting diode LD. The collector electrode is connected to the connected resistor R5 and the other end of each of the resistors R4 and R5, and npn transistors Tr1 and Tr2 of which the emitter electrode is grounded are added. In addition, a control signal is applied from the signal processing circuit 16a to the base electrodes of the transistors Tr1 and Tr2. Since it is the same structure as the hybrid relay 1 of 1st Embodiment about other structure, the detail is abbreviate | omitted.

The operation of the hybrid relay 1a configured as described above will be described below with reference to the timing charts shown in FIGS. 2 and 11. The hybrid relay 1a is similar to the hybrid relay 1 in the first embodiment, and supplies timings of driving currents to the magnetic coils L1 to L3 and the light emitting diode LD, and the contact portions S1 and S2, respectively. Of the ON / OFF timing and the ON / OFF timing of each of the triac S3 and the phototriac S4 become timings in the timing chart of FIG. 2.

That is, when power is supplied to the load 3 by the AC power supply 2, a driving current is applied to the magnetic coil L3, and after turning ON the contact part S2 of the 2nd mechanical contact switch 13, light emission is performed. The diode LD is made to emit light to conduct the phototriac S4 and the triac S3 to turn on the semiconductor switch 14. Thus, in the state which turned on the 2nd mechanical contact switch 13 and the semiconductor switch 14 ON, the 1st mechanical contact switch 12 is provided by giving the magnetic coil L1 the drive current which becomes a pulse current. Turn on contact S1. Thereafter, the drive current to the light emitting diode LD is stopped, the photoelectric switch S4 and the triac S3 are turned off, and the semiconductor switch 14 is turned off, and then the drive current to the magnetic coil L3. Is stopped, and the contact portion S2 of the second mechanical contact switch 13 is turned OFF.

On the other hand, at the time of interruption of power supply to the load 3 by the AC power supply 2, after the driving current is applied to the magnetic coil L3 and the second mechanical contact switch 13 is turned ON, the light emitting diode ( LD) is made to emit light, and the semiconductor switch 14 is turned ON. And the contact part S1 of the 1st mechanical contact switch 12 is switched OFF by giving the drive coil which becomes a pulse electric current to the magnetic coil L2. After that, the drive current to the light emitting diode LD is stopped, the semiconductor switch 14 is turned off, the supply of the drive current to the magnetic coil L3 is stopped, and the second mechanical contact switch 13 is turned off. do.

At this time, as shown in the timing chart of FIG. 11, the hybrid relay 1a of the present embodiment determines the timing at which the control signal is applied to the base electrodes of the transistors Tr1 and Tr2, thereby providing the magnetic coil L3. And timings for providing driving currents of the light emitting diodes LD, respectively. Therefore, hereinafter, the output timing of the control signal applied to the base electrodes of the transistors Tr1 and Tr2 by the signal processing circuit 16a and the timing of generation of the drive current in the magnetic coil L2 and the light emitting diode LD are described below. Will be described with reference to the timing chart of FIG.

As shown in the timing chart of FIG. 11, the signal processing circuit 16a first applies a control signal to the base electrode of the transistor Tr1 to turn the transistor Tr1 into a conductive state ON. The series circuit driven by (R3, R4) and the magnetic coil L3 is driven. That is, the signal processing circuit 16a supplies the drive current only to the magnetic coil L3 by turning on the transistor Tr1. As a result, as described above, the contact portion S2 of the second mechanical contact switch 13 is turned ON.

When time t1 elapses after the transistor Tr1 is turned on, the signal processing circuit 16a stops the supply of the control signal for the gate electrode of the transistor Tr1 and the gate of the transistor Tr2. Supply of control signals to the electrodes is started. That is, the transistor Tr1 is turned OFF, and the transistor Tr2 is turned ON to drive a series circuit by the resistors R3 and R5, the magnetic coil L3, and the light emitting diode LD. As a result, the drive current is supplied from the signal processing circuit 16a to each of the magnetic coil L3 and the light emitting diode LD connected in series, so that the contact portion S2 of the second mechanical contact switch 13 is provided. The triac S3 of the semiconductor switch 14 can be turned ON while the state is ON.

In addition, unlike the hybrid relay 1 of the first embodiment, since the magnetic coil L3 and the light emitting diode LD are connected in series, the driving currents flowing through them are common. Therefore, compared with the hybrid relay 1 of 1st Embodiment which connected the magnetic coil L3 and the light emitting diode LD in parallel, the drive current amount at the time of driving the magnetic coil L3 and the light emitting diode LD simultaneously. Can be reduced, which suppresses power consumption. Then, after the driving current is supplied to the light emitting diode LD, the triac S3 of the semiconductor switch 14 is turned on, and as described above, the signal processing circuit 16a uses the magnetic coils L1 and L2. The driving current which becomes a pulse current is supplied to any one of them. That is, at the time of supplying power to the load 3, the drive current is supplied to the magnetic coil L1, the contact portion S1 of the first mechanical contact switch 12 is turned ON, and the load 3 is supplied to the load 3. When the power supply is cut off, the drive current is supplied to the magnetic coil L2, and the contact portion S1 of the first mechanical contact switch 12 is turned OFF.

In this way, when the ON / OFF of the first mechanical contact switch 12 is switched, the signal processing circuit 16a stops the supply of the control signal with respect to the gate electrode of the transistor Tr2, and the transistor Tr1. Supply of the control signal with respect to the gate electrode is started. That is, the transistor Tr2 is turned OFF, the transistor Tr1 is turned ON, the supply of the drive current to the light emitting diode LD is stopped, and the triac S3 of the semiconductor switch 14 is turned OFF. do. At this time, since the drive current is continuously supplied to the magnetic coil L3 because the transistor Tr1 is ON, the contact portion S2 of the second mechanical contact switch 13 is in an ON state. When time t2 elapses after the transistor Tr2 is turned off, the signal processing circuit 16a stops supplying the control signal for the gate electrode of the transistor Tr1. That is, the transistor Tr1 is turned off, the supply of the drive current to the magnetic coil L3 is stopped, and the second mechanical contact switch 13 is turned off.

As in the present embodiment, when the magnetic coil L3 and the light emitting diode LD are connected in series, when the second mechanical contact switch 13 and the semiconductor switch 14 are turned ON at the same time, the magnetic coil ( A common driving current can flow through L3) and the light emitting diode LD. Therefore, compared with the case where the magnetic coil L3 and the light emitting diode LD are connected in parallel, the amount of drive current supplied from the signal processing circuit 16a can be reduced, so that the power in the hybrid relay 1a is reduced. Consumption can be reduced.

In the present embodiment, the resistance (the current value flowing through the magnetic coil L3 when the transistor Tr2 is turned ON is smaller than the current value flowing through the magnetic coil L3 when the transistor Tr1 is turned ON. The resistance values of R4 and R5 may be set. That is, when the resistances of the resistors R4 and R5 are Rr4 and Rr5, the drop voltage of the light emitting diode D5 is Vd, and the current flowing through the magnetic coil L3 when the transistor Tr1 is turned on is I1. The resistance value Rr5 of the resistor R5 is set to be larger than Rr4-DD / I1.

By setting the resistance values of the resistors R4 and R5 in this manner, when the transistor Tr1 is turned on, a sufficiently large current can flow through the magnetic coil L3 to turn on the second mechanical contact switch 13. When the semiconductor switch 14 is turned on while the second mechanical contact switch 13 is in the ON state, the transistor Tr2 is turned on with less current than when the second mechanical contact switch 13 is turned ON. Can be. As a result, in the timing chart of FIG. 11, the total amount of the drive current for operating the transistors Tr1 and Tr2 can be suppressed and the power consumption can be reduced.

(Third Embodiment)

A hybrid relay according to a third embodiment of the present invention will be described with reference to the drawings. In addition, the internal structure of the hybrid relay of this embodiment becomes the structure shown in FIG. 10 similarly to 2nd Embodiment. 12 is a timing chart which shows the state transition in each part in the hybrid relay of this embodiment. In the present embodiment, the hybrid relay 1a having the same configuration as that of the second embodiment is used. However, unlike the second embodiment, different timings are used at the time of ON switching and OFF switching of the first mechanical contact switch 12. Thus, each of the transistors Tr1 and Tr2 is driven. Therefore, below, with reference to the timing chart of FIG. 12, operation | movement of the hybrid relay 1a of this embodiment is demonstrated.

As shown in the timing chart of FIG. 12, when power is supplied to the load 3, first, as in the second embodiment, the signal processing circuit 16a turns on the transistor Tr1 and turns on the magnetic coil L3. The drive current is supplied to the contact portion, and the contact portion S2 of the second mechanical contact switch 13 is turned ON. Thereafter, the signal processing circuit 16a turns off the transistor Tr1 and turns on the transistor Tr2 to supply the driving current to the magnetic coil L3 and the light emitting diode LD. As a result, the triac S3 of the semiconductor switch 14 is turned ON while the contact portion S2 of the second mechanical contact switch 13 is ON. In this way, when the triac S3 in the semiconductor switch 14 is turned ON and the power from the AC power supply 2 is supplied to the load 3, the signal processing circuit 16a supplies the magnetic coil L1 to the load 3. The drive current which becomes a pulse current is supplied, and the contact part S1 of the 1st mechanical contact switch 12 is turned ON.

Then, when the power supply to the load 3 is started by the AC power supply 2 via the contact portion S1 of the first mechanical contact switch 12, in order to interrupt the power supply path in the semiconductor switch 14. The signal processing circuit 16a turns off the transistor Tr2 and stops the supply of the drive current to the magnetic coil L3 and the light emitting diode LD. That is, in this embodiment, after turning on the 1st mechanical contact switch 12 at the time of supplying power to the load 3, unlike the 2nd embodiment, it turns ON the transistor Tr1 and turns on a magnetic coil. The period of supplying the drive current to only L3 is excluded. Accordingly, according to the power supply operation of the present embodiment, the magnetic coil L3 is turned on by turning on the transistor Tr1 after turning on the first mechanical contact switch 12 as compared with the operation of the second embodiment. The power consumption can be reduced by the amount corresponding to the drive current supplied to the.

On the other hand, at the time of interrupting power supply to the load 3 by the AC power supply 2, unlike the second embodiment, the signal processing circuit 16a first turns on the transistor Tr2 and turns on the magnetic coil L3. ) And the light-emitting diode LD are supplied with driving currents to turn on the contact portion S2 of the second mechanical contact switch 13 and the triac S3 of the semiconductor switch 14. In this way, when the power supply path passing through the contact portion S2 of the second mechanical contact switch 13 and the triac S3 in the semiconductor switch 14 is established, the signal processing circuit 16a drives the pulse current. A current is supplied to the magnetic coil L2 to turn off the contact portion S1 of the first mechanical contact switch 12.

When the power supply path passing through the contact portion S1 of the first mechanical contact switch 12 is interrupted, the signal processing unit 16a turns off the transistor Tr2 and turns off the transistor Tr1 as in the second embodiment. ) Is turned ON, supply of the drive current to the light emitting diode LD is stopped, and the triac S3 of the semiconductor switch 14 is turned OFF. Thereby, the electric power supply to the load 3 by the AC power supply 2 is interrupted | blocked. Thereafter, the signal processing circuit 16a turns off the transistor Tr1, stops the supply of the drive current to the magnetic coil L3, and turns off the contact portion S2 of the second mechanical contact switch 13. do.

That is, in this embodiment, at the time of interrupting the power supply to the load 3, unlike the second embodiment, the period during which only the second mechanical contact switch 12 is turned on before the semiconductor switch 14 is turned on. Will be excluded. As a result, the operation at the time of turning off the power supply of the present embodiment is performed. Compared to the operation of the second embodiment, the transistor Tr1 is turned ON before the semiconductor switch 14 is turned ON. The power consumption can be reduced by an amount corresponding to the drive current supplied to the circuit.

(Fourth Embodiment)

A hybrid relay according to a fourth embodiment of the present invention will be described with reference to the drawings. FIG. 13 is a schematic circuit diagram showing an internal configuration of a hybrid relay of the present embodiment, and FIG. 14 is a timing chart showing a state transition in each part of the hybrid relay of FIG. In addition, in the hybrid relay of FIG. 13, the same code | symbol is attached | subjected about the part same as the structure in the hybrid relay of FIG. 10, and the detailed description is abbreviate | omitted.

As shown in FIG. 13, the hybrid relay 1b of the present embodiment includes a series circuit including a resistor R5a and a transistor Tr2a in the configuration of the hybrid relay 1a (see FIG. 10). It becomes the structure further connected to the cathode electrode of (LD). That is, the collector of the npn type transistor Tr2a with the emitter electrode grounded is connected to the other end of the resistor R5a, one end of which is connected to the connection node between the cathode electrode of the light emitting diode LD and the resistor R5. In addition, the hybrid relay 1b is a signal processing circuit for applying a current signal to each of the gate electrodes of the transistors Tr1, Tr2, and Tr2a and the magnetic coils L1 and L2 instead of the signal processing circuit 16a ( 16b).

In the hybrid relay 1b configured as described above, the relationship between the resistance values Rr5 and Rr5a of the resistors R5 and R5a connected in series to the light emitting diode LD is Rr5 <Rr5a. When the resistance value of the resistor R4 is Rr4, the drop voltage of the light emitting diode D5 is Vd, and the current flowing through the magnetic coil L3 is I1 when the transistor Tr1 is turned ON, the resistor R5 The resistance value Rr5 is Rr4-Vd / I1. By setting the resistance values Rr5 and Rr5a of the resistors R5 and R5a in this manner, the current value flowing through the magnetic coil L3 when the transistor Tr1 is turned ON and the magnetic coil (when the transistor Tr2 is turned ON) The current value flowing through L3 can be made the same, and the current value flowing through the magnetic coil L3 can be reduced when the transistor Tr2a is turned ON.

Hereinafter, with reference to the timing chart of FIG. 14, operation | movement of the hybrid relay 1b of this embodiment is demonstrated. As shown in the timing chart of FIG. 14, when power is supplied to the load 3, first, the signal processing circuit 16b turns on the transistor Tr1 and turns on the magnetic coil L3 as in the third embodiment. The drive current is supplied to the contact portion, and the contact portion S2 of the second mechanical contact switch 13 is turned ON. In this way, after giving sufficient drive current to the magnetic coil L3 and turning on the contact part S2, the drive current of the amount of electric current required in order to hold | maintain the contact part S2 in an ON state is supplied to the magnetic coil L3. Since it can flow, the amount of current can be made low. Therefore, unlike the third embodiment, the signal processing circuit 16b turns off the transistor Tr1 and, at the same time, turns the transistor Tr2a ON and has a smaller current amount than when the transistor Tr1 is turned ON. The driving current is supplied to the magnetic coil L3 and the light emitting diode LD.

As a result, the triac S3 of the semiconductor switch 14 is turned ON while the contact portion S2 of the second mechanical contact switch 13 is ON. In this way, when the power supply from the AC power supply 2 is supplied to the load 3, the signal processing circuit 16b supplies the drive current which consists of a pulse electric current to the magnetic coil L1 like 3rd embodiment, The contact portion S1 of the first mechanical contact switch 12 is turned on. Thereafter, in order to interrupt the power supply path in the semiconductor switch 14, the signal processing circuit 16b turns off the transistor Tr2a and supplies the driving current to the magnetic coil L3 and the light emitting diode LD. Stop.

On the other hand, at the time of power interruption to the load 3 by the AC power supply 2, as in the third embodiment, the signal processing circuit 16b first turns on the transistor Tr2 to turn on the magnetic coil L3 and light emission. The driving current is supplied to each of the diodes LD. In this way, when the contact part S2 of the 2nd mechanical contact switch 13 and the triac S3 of the semiconductor switch 14 turn ON, the drive current which flows into the magnetic coil L3 can be reduced. Therefore, the signal processing unit 16b turns on the transistor Tr2a at substantially the same time as turning off the transistor Tr2. In this way, in the state where the contact portion S2 of the second mechanical contact switch 13 and the triac S3 of the semiconductor switch 14 are turned ON, the magnetic coil L3 and the light emitting diode LD are each better. Small drive currents can be supplied. Then, the signal processing circuit 16b supplies a drive current consisting of a pulse current to the magnetic coil L2 to turn off the contact portion S1 of the first mechanical contact switch 12.

When the power supply path passing through the contact portion S1 of the first mechanical contact switch 12 is interrupted, the signal processing unit 16b turns off the transistor Tr2a and turns on the transistor Tr1 at substantially the same time, whereby the light emitting diode LD The supply of the drive current to () is stopped, and the triac S3 of the semiconductor switch 14 is turned OFF. As a result, the power supply to the load 3 by the AC power supply 2 is cut off as in the third embodiment. Thereafter, the signal processing circuit 16b turns off the transistor Tr1 as in the third embodiment, stops the supply of the drive current to the magnetic coil L3, and contacts the second mechanical contact switch 13. Turn OFF (S2).

As described above, in the present embodiment, the magnetic coil when the contact portion S2 of the second mechanical setting switch 13 is turned on while the contact portion S2 of the second mechanical contact switch 13 is kept in the ON state. The amount of current of the drive current supplied to the magnetic coil L3 can be made low compared with the amount of the drive current supplied to L3. Therefore, by using the hybrid relay 1b of this embodiment, power consumption can be further reduced compared with the case of 3rd embodiment.

(Fifth Embodiment)

A hybrid relay according to a fifth embodiment of the present invention will be described with reference to the drawings. FIG. 15 is a schematic circuit diagram showing an internal configuration of a hybrid relay of the present embodiment, and FIG. 16 is a timing chart showing a state transition in each part of the hybrid relay of FIG. 15. In addition, in the hybrid relay of FIG. 15, the same code | symbol is attached | subjected about the part same as the structure in the hybrid relay of FIG. 13, and the detailed description is abbreviate | omitted.

As shown in FIG. 15, the hybrid relay 1c of the present embodiment includes a series circuit including a resistor R4a and a transistor Tr1a in the configuration of the hybrid relay 1b (see FIG. 13). The configuration is further connected to the connection node of the L3 and the resistor R4. That is, one end of the resistor R4a is connected to the connection node of the magnetic coil L3 and the resistor R4, and the collector of the npn type transistor Tr1a having the emitter electrode grounded at the other end of the resistor R4a. Is connected. In addition, instead of the signal processing circuit 16b, the hybrid relay 1c is a signal processing for providing a current signal to each of the gate electrodes of the transistors Tr1, Tr1a, Tr2, and Tr2a, and the magnetic coils L1 and L2. The circuit 16c is provided.

In addition, the resistance values Rr4 and Rr4a of the resistors R4 and R4a become Rr4 <Rr4a similarly to the relationship between the resistance values Rr5 and Rr5a of the resistors R5 and R5a. That is, the current value flowing through the magnetic coil L3 when the transistor Tr1 is turned ON and the current value flowing through the magnetic coil L3 when the transistor Tr2 is turned ON are made the same, and the transistor Tr1a is turned ON. The current value flowing through the magnetic coil L3 is equal to the current value flowing through the magnetic coil L3 when the transistor Tr2a is turned ON. The current value flowing through the magnetic coil L3 when the transistors Tr1 and Tr2 are turned ON is smaller than the current flowing through the magnetic coil L3 when the transistors Tr1 and Tr2 are turned ON. can do.

The operation of the hybrid relay 1c will be described below with reference to the timing chart of FIG. As shown in the timing chart of FIG. 16, at the time of supplying power to the load 3, first, as in the fourth embodiment, the signal processing circuit 16c turns on the transistor Tr1, and thereby the second mechanical contact switch. Turn on the contact portion S2 of (13). Then, the signal processing circuit 16c turns on the transistor Tr2a at substantially the same time as turning off the transistor Tr1 so as to supply a drive current having a current amount smaller than the amount supplied when the transistor Tr1 is turned on. . As a result, the triac S3 of the semiconductor switch 14 is turned ON while the contact portion S2 of the second mechanical contact switch 13 is ON.

In this way, when the power supply is supplied from the AC power supply 2 to the load 3, the signal processing circuit 16c supplies the drive current which consists of a pulse current to the magnetic coil L1, and the 1st mechanical contact switch 12 After turning ON the contact portion S1 of the transistor S1, the transistor Tr2a is turned OFF to stop the supply of the drive current to the magnetic coil L3 and the light emitting diode LD.

On the other hand, when the power supply to the load 3 by the AC power supply 2 is cut off, the signal processing circuit 16c first turns on the transistor Tr2 and contacts the contact portion S2 of the second mechanical contact switch 13. ) And the triac S3 of the semiconductor switch 14 are turned ON. Thereafter, the signal processing circuit 16c turns on the transistor Tr2a at substantially the same time as turning off the transistor Tr2. In addition, while the contact portion S2 of the second mechanical contact switch 13 and the triac S3 of the semiconductor switch 14 are turned on, the signal processing circuit 16c self-holds a drive current consisting of a pulse current. It supplies to the coil L2, and turns off the contact part S1 of the 1st mechanical contact switch 12. FIG.

When the feed path passing through the contact portion S1 of the first mechanical contact switch 12 is cut off, unlike the fourth embodiment, the signal processing circuit 16c turns off the transistor Tr2a at substantially the same time and turns off the transistor Tr1a. To ON. As a result, the supply of the driving current to the light emitting diode LD is stopped, and the triac S3 of the semiconductor switch 14 is turned off.

According to the present embodiment, when the power supply to the load 3 by the AC power supply 2 is cut off, the driving current supplied to the magnetic coil L3 can be reduced as in the case where the transistor Tr2a is turned on. Therefore, compared with the fourth embodiment, power consumption can be further reduced. Thereafter, the signal processing circuit 16c turns off the transistor Tr1a, stops the supply of the drive current to the magnetic coil L3, and turns off the contact portion S2 of the second mechanical contact switch 13. do.

In addition, it is good also as a structure which omitted the series circuit which consists of the resistor R5a and the transistor Tr2a from the structure of the hybrid relay 1c of this embodiment. In such a configuration, when power is supplied to the load 3, the transistor Tr1 is turned OFF and the transistor Tr2 is turned ON as in the third embodiment. On the other hand, when the power supply to the load 3 is interrupted, the drive current is supplied to the magnetic coil L2 in the state where the transistor Tr2 is turned on as in the third embodiment.

According to the hybrid relay in each of the second to fifth embodiments described above, the driving current is applied to either of the magnetic coils L1 and L2 while the driving current is flowing through the light emitting diode LD and the magnetic coil L3. When it flows, the total amount of the drive current becomes large. That is, when the drive current flows to either of the magnetic coils L1 and L2, the drive current supplied to the drive circuit of the hybrid relay peaks temporarily. For this reason, when the control terminal apparatus which communicates with a transmission control apparatus by a power supply line is provided with a plurality of hybrid relays mentioned above, and a plurality of hybrid relays all perform power supply or power cutoff simultaneously, the drive at this peak time The current is supplied to the control terminal device.

Therefore, the power supply or the power cut-off can be driven at the same timing only for some hybrid relays, for example, for every integer number (e.g., two) hybrid relays, so that the driving current peaked can be dispersed. The extreme voltage drop of the supply voltage to the control terminal device can be suppressed. In addition, in the hybrid relay according to the above-described embodiment, the magnetic force generated by the magnetic coils L1 to L3 may be repulsive force or attractive force, and preferably may be attractive force. have.

(Sixth Embodiment)

A hybrid relay according to a sixth embodiment of the present invention will be described with reference to the drawings. FIG. 17 is a schematic circuit diagram showing an internal configuration of a hybrid relay of the present embodiment, and FIG. 18 is a timing chart showing a state transition in each part of the hybrid relay of FIG. 17. 17, the same code | symbol is attached | subjected about the part same as the structure in the hybrid relay of FIG. 1, and the detailed description is abbreviate | omitted.

As shown in FIG. 17, the hybrid relay 1d of the present embodiment has a first mechanical contact switch (instead of the second mechanical contact switch 13 in the hybrid relay 1 (see FIG. 1)). A second mechanical contact switch 13a of the latch type as shown in 12) is provided. That is, the second mechanical contact switch 13a includes a magnetic coil L3a for generating a magnetic force for turning on the contact portion S2 and a magnetic coil for generating a magnetic force for turning off the contact portion S2. (L3b) is provided. These magnetic coils L3a and L3b are connected in series and their connection nodes are grounded. Therefore, in this embodiment, the magnetic coils L3a and L3b constitute the second drive part of the second mechanical contact switch 13a.

In addition, the second mechanical contact switch 13a including the magnetic coils L3a and L3b includes diodes D6 to D9 corresponding to the diodes D1 to D4 in the first mechanical contact switch 12. do. That is, each of the diodes D6 and D7 having the anode electrode grounded is connected in parallel to each of the magnetic coils L3a and L3b, and the diodes D8 and D9 having the anode electrode connected to the signal processing circuit 16d. Each cathode electrode is connected to a cathode electrode of each of the diodes D6 and D7. Since the other structure is the same as that of the hybrid relay 1 of 1st Embodiment, the detail is abbreviate | omitted.

In the hybrid relay 1d, the contact portion S1 of the first mechanical contact switch 12, the contact portion S2 of the second mechanical contact switch 13a, and the triac S3 of the semiconductor switch 14. The switching timing of ON / OFF in each is the same as that of the hybrid relay 1 of the first embodiment. That is, to the magnetic coils L1 and L2 and the light emitting diode LD in each of the first mechanical contact switch 12 and the semiconductor switch 14 having the same configuration as the hybrid relay 1 of the first embodiment. As for the timing, the drive current is supplied from the signal processing circuit 16d in the same manner as in the first embodiment. Therefore, below, the operation | movement of hybrid relay 1d is demonstrated with reference to the timing chart of FIG. 18 centering on ON / OFF of the 2nd mechanical contact switch 13a.

As shown in the timing chart of FIG. 18, when power is supplied to the load 3, the magnetic coil L3a from the signal processing circuit 16d is turned on to turn on the contact portion S2 of the second mechanical contact switch 13a. ) Is supplied with a drive current consisting of a pulse current. As a result, when the contact portion S2 of the second mechanical contact switch 13a is turned ON, when the time t1 elapses after the drive current is supplied to the magnetic coil L3a, the light-emitting diode 16d is released from the signal processing circuit 16d. The driving current is supplied to the LD. Therefore, after the second mechanical contact switch 13a is turned on like the hybrid relay 1 of the first embodiment, when the AC voltage from the AC power supply 2 becomes the center voltage (reference voltage), the semiconductor switch ( In 14), in conjunction with the conduction of the phototriac S4, the triac S3 is turned on, and the semiconductor switch is turned on.

In this way, when the second mechanical contact switch 13a and the semiconductor switch 14 are turned on, and power supply to the load 3 by the AC power supply 2 is started, the signal processing circuit 16d starts the magnetic coil ( The drive current which consists of a pulse current is supplied to L1), and the contact part S1 of the 1st mechanical contact switch 12 is turned ON. When the first mechanical contact switch 12 is turned ON, the signal processing circuit 16d stops supplying the driving current to the light emitting diode LD. Accordingly, in the semiconductor switch 14, when the AC voltage from the AC power supply 2 becomes the center voltage (reference voltage), each of the triac S3 and the phototriac S4 becomes non-conductive. The semiconductor switch 14 is turned off.

In addition, when time t2 has elapsed since the supply of the driving current to the light emitting diode LD is stopped, the signal processing circuit 16d is driven by a pulse current with respect to the magnetic coil L3b of the second mechanical contact switch 13a. Supply the current. As a result, in the second mechanical contact switch 13a, the contact portion S2 is turned OFF. By operating in this way, the semiconductor switch 14 can be turned ON between turning on and turning off the second mechanical contact switch 13a. In addition, the signal processing circuit 16d supplies the drive current to the magnetic coils L3a and L3b only when the second mechanical contact switch 13a is switched ON / OFF. In other words, the timing at which the driving current is supplied to the light emitting diode LD of the semiconductor switch 14 and the timing at which the driving current is supplied to the magnetic coils L3a and L3b are set to different timings.

And also when interrupting the power supply to the load 3, the signal processing circuit 16d will pulse pulse current to the magnetic coils L3a and L3b only when switching ON / OFF of the 2nd mechanical contact switch 13a. Supply the drive current to be. That is, first, the drive current is supplied to the magnetic coil L3a, the contact portion S2 of the second mechanical contact switch 13a is turned on, and then the drive current is supplied to the light emitting diode LD, thereby providing a semiconductor switch ( Turn on the triac S3 of 14). After that, when driving current is supplied to the magnetic coil L2 and the contact portion S1 of the first mechanical contact switch 12 is turned OFF, first, supply of the driving current to the light emitting diode LD is stopped, Triac S3 of semiconductor switch 14 is turned OFF. Then, the drive current is supplied to the magnetic coil L3b to turn off the contact portion S2 of the second mechanical contact switch 13a.

According to this embodiment, by making the 2nd mechanical contact switch 13a into a latch type mechanical contact switch, only the drive current which consists of pulse current is supplied to magnetic coils L3a and L3b, You can switch ON / OFF. Therefore, the drive current does not flow simultaneously from the signal processing circuit 16d to each of the magnetic coils L3a and L3b and the light emitting diode LD. Therefore, compared with the hybrid relay 1 of the first embodiment provided with the second mechanical contact switch 13 of the always-excited type, although it is difficult to miniaturize, the amount of drive current supplied from the signal processing circuit 16d is reduced. Since it can reduce, the power consumption in the hybrid relay 1d can also be reduced.

Moreover, in each embodiment mentioned above, suppose that the 1st mechanical contact switch 12 has an auxiliary contact with a small capacity which performs opening / closing operation | work in connection with the contact part S1 used as a main contact, and opens and closes an auxiliary contact. May be checked by each of the signal processing circuits 16, 16a to 16d to detect conduction / non-conduction of the contact portion S1. Thus, by setting it as the structure provided with the 1st mechanical contact switch 12 which has an auxiliary contact, the conduction / non-conduction of the contact part S1 is detected reliably, and the contact part of the 2nd mechanical contact switches 13 and 13a is made. (S2) and the semiconductor switches 15 and 15a can be shifted to the blocking operation.

While the invention has been shown and described as embodiments, those skilled in the art will recognize that various modifications and changes can be made without departing from the scope of the invention as set forth in the appended claims.

1, 1a to 1d: hybrid relay 2: AC power supply
3: load 10, 11: terminal
12: 1st mechanical contact switch 13, 13a: 2nd mechanical contact switch
14, 14a: semiconductor switch 15, 15a: phototriac coupler
16, 16a-16d: signal processing circuit C1: capacitor
D1 to D9: diodes L1 to L3: magnetic coils
L3a, L3b: magnetic coil LD: light emitting diode
R1 to R5, R4a, R5a: resistors S1, S2: contact portion
S3: Triac S4: Photo Triac
Tr1, Tr2, Tr1a, Tr2a: transistor

Claims (13)

A first mechanical contact switch having a contact portion opened and closed by the first drive portion,
A second mechanical contact switch having a contact portion opened and closed by a second drive portion operating independently from the first drive portion,
A semiconductor switch connected in series with said second mechanical contact switch
And,
The first mechanical contact switch is connected in parallel with a series circuit by the second mechanical contact switch and the semiconductor switch on a feed path from a power supply to a load,
The first mechanical contact switch is a latch-type mechanical contact switch in which current is supplied to the first drive unit when the contact portion of the first mechanical contact switch is switched between an open state and a closed state,
The second mechanical contact switch and the semiconductor switch are each turned on before switching of the opening and closing of the contact portion of the first mechanical contact switch, and are respectively non-conductive after switching of the opening and closing of the contact portion of the first mechanical contact switch,
In the case where the contact portion of the first mechanical contact switch is closed, the semiconductor switch is turned on after closing the contact portion of the second mechanical contact switch, and in the state where each of the second mechanical contact switch and the semiconductor switch is in conduction, the Closing the contact portion of the first mechanical contact switch, opening the contact portion of the second mechanical contact switch, and simultaneously conducting the semiconductor switch,
In the case where the contact portion of the first mechanical contact switch is opened, the semiconductor switch is turned on at the same time as closing the contact portion of the second mechanical contact switch, and in the state where each of the second mechanical contact switch and the semiconductor switch is conductive, Opening the contact portion of the first mechanical contact switch, opening the contact portion of the second mechanical contact switch after non-conducting the semiconductor switch.
Hybrid relays.
delete The method of claim 1,
The power source is AC power,
The semiconductor switch is a semiconductor switch having a zero-cross firing function that conducts when the voltage supplied from the AC power becomes a center voltage.
Hybrid relays.
The method of claim 3, wherein
When the contact portion of the second mechanical contact switch is opened after the semiconductor switch is non-conductive, after the elapse of time when the semiconductor switch is non-conducting and becomes equal to or more than half a cycle of an AC voltage from the AC power supply, the second mechanical contact is performed. Hybrid relay that opens the contact of the switch.
delete The method according to any one of claims 1, 3, and 4,
The second mechanical contact switch is a normal exicitation type mechanical contact switch in which current is always supplied to the second drive while the contact portion of the second mechanical contact switch is closed,
The semiconductor switch includes a photo-coupler having a light emitting element for generating an optical signal and controlled to be conductive and non-conductive based on the optical signal of the light emitting element,
The second driver and the light emitting element are connected in series, and when the second mechanical contact switch and the semiconductor switch are simultaneously connected, the second driver and the light emitting element are driven by a common current.
Hybrid relays.
The method according to claim 6,
When simultaneously conducting the second mechanical contact switch and the semiconductor switch from the non-conductive state, a first current is supplied to each of the light emitting element and the second driver,
When the second mechanical contact switch and the semiconductor switch are conducted while the second mechanical contact switch is in a conducting state, a second current having a smaller current amount than the first current is applied to the light emitting element and the second driver. Supplied
Hybrid relays.
The method according to claim 6,
When closing the contact portion of the second mechanical contact switch, after supplying a first current to the second drive portion and closing the contact portion of the second mechanical contact switch, the current amount is greater than the first current in the second drive portion. Hybrid relay that supplies this small second current.
The method according to any one of claims 1, 3, and 4,
And the second mechanical contact switch is a latch type mechanical contact switch, and supplies a current to the second drive unit only when the contact portion of the second mechanical contact switch is opened and closed.
The method according to any one of claims 1, 3, and 4,
And a contact pressure of the second mechanical contact switch is less than the first mechanical contact switch contact pressure, and a distance between the contacts of the second mechanical contact switch is shorter than a distance between the contacts of the first mechanical contact switch.

The method according to any one of claims 1, 3, and 4,
And the contact portion of the first mechanical contact switch includes a contact point and a magnetic circuit which generates magnetic attraction in a direction in which the contact closes when the short circuit current flows through the contact point.
The method according to any one of claims 1, 3, and 4,
The first mechanical contact switch has an auxiliary contact that interlocks with the contact portion of the first mechanical contact switch, and on the basis of opening and closing of the auxiliary contact, conduction or non-conduction of the contact portion of the first mechanical contact switch is detected. Hybrid relays. A predetermined number of hybrids are provided when a plurality of hybrid relays according to any one of claims 1, 3, and 4 are switched, and switching the opening and closing at the contact portion of the first mechanical contact switch of each of the plurality of hybrid relays is simultaneously switched. The control terminal apparatus which performs switching operation of opening and closing of the contact part of a said 1st mechanical contact switch for every relay.

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