JPH11238442A - Hybrid relay device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hybrid relay device equipped with a high capacity and a long lifetime by protecting its semiconductor switch part and preventing arc generation in the contact switch part. SOLUTION: A hydride relay device 1 is equipped with a contact switch mechanism 2 having a contact switch part 21 to be turned on and off by the exciting current flowing in an exciting coil 20 and a semiconductor switch mechanism 3 having a semiconductor switch part 3Q to be turned on and off by the zero-cross type gate current, in which the contact switch part 21 is connected including the semiconductor switch part 3Q parallel, and the switch part 3Q is put under the on-off control so that no arcs are generated in the contact switch part 21 when power supplying from an AC load power supply A to the load L is put on and off, wherein the arrangement further includes an exciting coupler 4 equipped with an exciting switch part 41 connected in series to an energization coil and an exciting gate part 42 which turns on the exciting switch part 41 during passing of a zero-cross type gate current capable of turning on the semiconductor switch part 3Q.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid relay device in which a semiconductor switch connected in parallel to a contact switch is controlled to be turned on / off in advance so that an arc is not generated in the contact switch.

[0002]

2. Description of the Related Art Recently, a large-capacity relay device excellent in on / off performance has been combined by combining an electromagnetic relay having a contact switch section and a semiconductor switch which is a non-contact switch so as to complement each other. Aiming at the hybrid relay device, attention is being paid.

FIG. 4 is a circuit diagram showing such a conventional hybrid relay device. The operation of the conventional hybrid relay device will be described with reference to FIG. In FIG. 4, reference numeral 1 denotes a hybrid relay device, and the hybrid relay device 1 includes input terminals T _{1 and} T ₂ and output terminals T _{3 and} T ₄ . Hybrid relay device 1 includes therein an electromagnetic relay 2 which corresponds to the contact switch mechanism, a semiconductor switch mechanism 3, a resistor R _1, ... R _3, a capacitor C _1.

The electromagnetic relay 2 includes an exciting coil 20 and a contact switch 21 which is turned on / off depending on the presence or absence of an exciting current flowing through the exciting coil 20. The semiconductor switch mechanism 3 includes a triac 3Q corresponding to a semiconductor switch unit and a photocoupler 3P. Photocoupler 3P is configured to include a light emitting diode 3P ₁ zero-crossing photo-triac 3P _2. Further, a series circuit of the resistor R ₁ and the capacitor C ₁ forms a charge / discharge circuit.

The hybrid relay device 1 shown in FIG.
The input terminal T_1,T_TwoBetween the excitation coil 20 and
Resistance R₁And capacitor C₁And a resistor R_TwoWhen
Light emitting diode 3P₁Are connected in parallel with
Connect to Output terminal T_3,T _FourBetween the contact switch section
21 and the triac 3Q are connected in parallel.
You. The gate of the triac 3Q is a zero-cross type photo
Triac 3P_TwoAnd resistance R_ThreeThrough a series circuit with
Output terminal T_ThreeConnect to Also, as an external connection,
Terminal T_1,T_TwoBetween the driving power source E and the driving switch S
Is connected to the output terminal T_3,T_FourAC load power supply A between
And a series circuit of the load L are connected to each other.

In the hybrid relay device 1 shown in FIG. 4, when the drive switch S is turned on to start supplying power to the load L, on the other hand, the exciting coil 20 is excited and the contact switch unit 21 is turned on. There as well as on, on the other hand a current to the light emitting diodes 3-way ₁ via the resistor R ₂ flows emitting diodes 3-way ₁ emits light, the zero-cross type photo-triac 3-way ₂ is turned on from the time when the voltage of the AC load power supply a crosses zero Then, the gate current of the triac 3Q starts to flow. Therefore, triac 3Q, in synchronization with the ON of the zero-cross type photo-triac 3-Way _2, the voltage of the AC load power supply A is turned on from the time of zero cross to start the power supplied to the AC load power supply A load L.

At this time, since the semiconductor switch mechanism 3 operates electrically, the triac 3Q is turned on earlier than the electromagnetic relay 2 corresponding to the contact switch mechanism, and the AC load power supply A From Triac 3Q
After the power supply to the load L is started via the contact switch unit 21, the contact switch unit 21 is turned on.
The occurrence of an arc when ON of 1 is prevented.

When a capacitive load (such as an inverter-type lighting fixture or a television set equipped with a switching power supply) is connected as the load L, the capacitive load is charged when the AC load power supply A is turned on. 3Q is the AC load power supply A
Is turned on from the point in time when the voltage crosses zero, the rush load current is suppressed as compared with the rush load current when the voltage turns on from the point in time when the voltage does not cross zero.
Channel temperature is suppressed below the maximum rating, and the triac 3Q can be protected.

[0009] In contrast, when the drive switch S to stop the power supply to the load L is turned off, since the light emitting operation of the light emitting diodes 3-Way ₁ is continued during the discharge period of the capacitor C _1, first Since the contact switch unit 21 is turned off in the energized state to the load L where the triac 3Q is on, and then the triac 3Q is turned off, the occurrence of arc in the contact switch unit 21 can be prevented.

As described above, by preventing the occurrence of an arc in the contact switch section 21 of the electromagnetic relay 2 corresponding to the contact switch mechanism, contact wear due to the occurrence of the arc is reduced, and the contact life is extended. At the same time, by turning on the triac 3Q from the time when the voltage of the AC load power supply A crosses zero, the inrush load current is suppressed to protect the triac 3Q from destruction, and the hybrid relay device 1 is reduced in size and increased in capacity. And longer life.

[0011]

[SUMMARY OF THE INVENTION However, in the conventional hybrid relay device as described above, in order to suppress the inrush load current flowing immediately after on of the triac 3Q, the light emitting diode 3-Way ₁ zero-crossing photo-triac although using a photocoupler 3P consisting 3P ₂ Prefecture, zero cross type photo-triac 3P ₂
The AC also emitting diodes 3-Way ₁ is emitting light load power supply A
Since the drive switch S is turned on after turning on of the drive switch S, there is a case where the drive switch S is turned on with a delay of half a cycle of the AC load power supply A in some cases. An original hybrid relay that reduces the timing difference between the ON state and the ON state and reverses the ON order causes an arc to occur in the contact switch unit 21 to prevent the arc and extend the life. There is a problem that the function of the device is impaired.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to suppress a rush load current when a load power supply is turned on to protect a semiconductor switch unit and to provide a contact switch unit. To ensure that the ON / OFF execution sequence between the switch and the semiconductor switch section is properly maintained, to ensure a sufficient ON / OFF timing difference, to prevent arcing in the contact switch section, to achieve a small, high capacity, and long life. An object is to provide an excellent hybrid relay device.

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a contact having a contact switch which is turned on / off by an exciting current flowing through an exciting coil. A switch mechanism, and a semiconductor switch mechanism having a semiconductor switch section that is turned on / off by a zero-crossing gate current. The contact switch section is connected so as to include the semiconductor switch section in parallel. In the hybrid relay device in which the semiconductor switch unit is controlled to be turned on / off so that an arc is not generated in the contact switch unit when power supply is turned on / off, a serial connection is made to the exciting coil. When an excitation switch section and the zero-crossing gate current that turns on the semiconductor switch section are passing through, Comprising an excitation gate portion allowed to turn on the excitation switch unit, characterized in that a excitation coupler.

According to the present invention, a first circuit in which a current limiting element is connected in series to the semiconductor switch section is formed, and the contact switch section is connected in parallel to the first circuit. A second circuit is formed.

According to a third aspect of the present invention, the current limiting element is a negative temperature coefficient thermistor.

According to a fourth aspect of the present invention, there is provided a contact switch mechanism having a plurality of contact switch sections which are turned on / off by an exciting current flowing through an exciting coil, and a semiconductor switch which is turned on / off by a zero-cross type gate current. A first contact switch unit is connected including the semiconductor switch unit in parallel, and a second contact switch unit is connected in series with a trigger unit of the semiconductor switch unit. The third contact switch is connected so that the load can be cut off without a leak current when the contact switch is turned off. When the power supply from the AC load power supply to the load is turned on / off, the third contact switch is connected to the third contact switch. A hybrid relay device that controls on / off of the semiconductor switch unit so that an arc does not occur in the semiconductor relay unit. A first circuit in which a negative-characteristic thermistor is connected in series to a switch section, and a second circuit in which the first contact switch section is connected in parallel to the first circuit are formed, and the exciting current is turned on. The ON operation delay time of each contact switch section is shortened in the order of the first contact switch section, the second contact switch section, and the third contact switch section, and each contact switch when the exciting current is turned off. The OFF operation delay time of the switch unit is the first contact switch unit,
The second contact switch section and the third contact switch section are lengthened in this order, and the first contact switch section when the exciting current is turned on.
The time difference between the turning on of the contact switch section and the turning on of the second contact switch section is at least a half cycle of the AC load power supply.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A hybrid relay device according to a first embodiment of the present invention will now be described with reference to FIG.
The hybrid relay device according to the third embodiment is shown in FIG.
Each will be described in detail based on the above.

[First Embodiment] FIG. 1 is a circuit diagram showing a hybrid relay device. Note that the same reference numerals are given to the same portions as those of the conventional hybrid relay device described with reference to FIG. 4 in the related art.

As shown in FIG. 1, the hybrid relay device 1 has input terminals T _{1 and} T ₂ and output terminals T _{3 and} T ₄ . Hybrid relay device 1 includes, in an electromagnetic relay 2 which corresponds to the contact switch mechanism, a semiconductor switch mechanism 3, a resistor R _1, ... R _3, a capacitor C _1, the photo-coupler 4, corresponding to the excitation coupler Is provided.

The electromagnetic relay 2 includes an exciting coil 20 and a contact switch section 21 which is turned on / off according to the presence or absence of an exciting current flowing through the exciting coil 20. The semiconductor switch mechanism 3 includes a triac 3Q corresponding to a semiconductor switch unit and a photocoupler 3P. Photocoupler 3P is configured to include a light emitting diode 3P ₁ zero-crossing photo-triac 3P _2. The photocoupler 4 includes a photothyristor 41 corresponding to an excitation switch unit and a light emitting diode 42 corresponding to an excitation gate unit.

In the hybrid relay apparatus 1 shown in FIG. 1, a series circuit of the exciting coil 20 and the photothyristor 41 and a series circuit of the resistor R ₁ and the capacitor C ₁ are provided between the input terminals T _{1 and} T _2. a circuit, the resistor R ₂ and the light emitting diode 3
A series circuit with P ₁ is connected in parallel. Between the output terminal T _3, T _4, and the triac 3Q and the contact switch 21 connected in parallel. The gate of the triac 3Q via a series circuit of a light emitting diode 42 and the zero-cross type photo-triac 3-Way ₂ and the resistor R _3, connected to the output terminal T _3. Also, as an external connection, the input terminal T1 _,
A series circuit of T is between ₂ and drive power supply E and the driving switch S is, the output terminal T _3, T is between ₄ and an AC load power supply A load L
Are connected to each other. A series circuit of a resistor R ₁ and capacitor C ₁ constitute a charge and discharge circuit.

The hybrid relay device 1 configured as described above operates as follows. That is, when the drive switch S to start the power supply to the load L is turned on, the light emitting diodes 3-Way ₁ current flows through the light emitting diode 3-Way ₁ to the resistor R ₂ constituting the semiconductor switch mechanism 3 Emits light. Then, zero-cross type photo-triac 3-Way ₂ is turned on from the time when the voltage of the AC load power supply A crosses zero, the resistance R ₃ and the zero-cross type photo-triac 3-Way ₂ and the gate of the triac 3Q via a series circuit of a light emitting diode 42 the gate current flows in the triac 3Q is turned on in synchronism with the oN of the zero-cross type photo-triac 3-way _2, inrush load current from the time when the voltage of the AC load power supply a crosses zero to flow through the triac 3Q, AC load with power supply from the power source a to the load L is started, the emission in synchronization with the oN of the zero-cross type photo-triac 3-Way ₂ diodes 42
Also, the photothyristor 41 is turned on, an exciting current flows through the exciting coil 20, and the contact switch section 21 is turned on.

At this time, the triac 3Q is turned on when the voltage of the AC load power supply A crosses zero, regardless of the timing at which the drive switch S is turned on, but the photothyristor 41 and the light emitting diode constituting the photocoupler 4 are turned on. By the action with 42, TRIAC 3
Since the photothyristor 41 is turned on at the same time as the Q is turned on and an exciting current flows through the exciting coil 20 to turn on the contact switch section 21, the semiconductor switch mechanism 3 operates more electrically. The triac 3Q is turned on earlier than the corresponding contact switch 21 of the electromagnetic relay 2 is turned on, and after the power supply from the AC load power supply A to the load L via the triac 3Q is started, the contact switch is turned on. The unit 21 is turned on,
The turn-on sequence of the triac 3Q and the contact switch unit 21 can be reliably maintained, and the load current flowing through the triac 3Q until immediately before flows through the contact switch unit 21 without arcing. Arc generation when the contact switch unit 21 is turned on is prevented.

When a capacitive load (such as an inverter-type lighting device or a television set equipped with a switching power supply) is connected as the load L, the capacitive load is charged when the AC load power supply A is turned on. 3Q is the AC load power supply A
Is turned on from the point in time when the voltage crosses zero, the rush load current is suppressed as compared with the rush load current when the voltage turns on from the point in time when the voltage does not cross zero.
Is suppressed below the maximum rating, and the triac 3Q is protected.

[0025] In contrast, when the drive switch S to stop the power supply to the load L is turned off, since the light emitting operation of the light emitting diodes 3-Way ₁ is continued during the discharge period of the capacitor C _1, first The contact switch unit 21 is turned off in the energized state to the load L in which the triac 3Q is turned on, and the load current flowing through the contact switch unit 21 until immediately before the contact switch unit 21 does not generate an arc at the contact switch unit 21 without causing an arc. Since the current flows through the 3Q, it is possible to prevent arcing when the contact switch unit 21 is turned off. Thereafter, the discharge of the capacitor C ₁ is terminated, the light emitting operation of the light emitting diodes 3-Way ₁ stops, triac 3Q
Is turned off.

Accordingly, in the hybrid relay device 1 shown in FIG. 1 described above, the power can be supplied from the AC load power supply A to the load L from the time when the voltage of the AC load power supply A always crosses zero. In addition, the inrush load current can be suppressed, and the triac 3Q can be protected from destruction due to the inrush load current, and the operation order of the triac 3Q and the contact switch unit 21 is never reversed. 21 can reliably prevent the occurrence of an arc, reduce contact wear due to the occurrence of an arc, and achieve high capacity and long contact life.

In the hybrid relay device 1 of the above embodiment, a photocoupler is exemplified as the excitation coupler, but an electromagnetic relay or the like may be used. It becomes a contact and the excitation gate becomes the excitation coil of the electromagnetic relay.

[Second Embodiment] FIG. 2 is a circuit diagram showing a hybrid relay device. The same parts as those in the hybrid relay device of the above-described first embodiment are denoted by the same reference numerals, and detailed description of the same parts will be omitted.

As shown in FIG. 2, this hybrid relay device 1 is different from the hybrid relay device of the first embodiment in that the triac 3Q is provided with a negative characteristic thermistor NTC corresponding to a current limiting element. Forming a series circuit 5 corresponding to the first circuit connected in series;
This is a configuration in which a parallel circuit 6 corresponding to a second circuit in which a contact switch unit 21 is connected in parallel to the series circuit 5 is formed. In the negative characteristic thermistor NTC, while the resistance value of a normal positive characteristic thermistor increases as the temperature rises,
It shows the characteristic that the resistance value decreases as the temperature rises.

Next, the operation of the hybrid relay device 1 configured as described above will be described. The operation sequence when the drive switch S of the hybrid relay device 1 is turned on / off is the same as the operation sequence of the hybrid relay device of the first embodiment. The operation of the hybrid relay device 1 which is different from the hybrid relay device of the first embodiment is the following operation.

That is, when the drive switch S is turned on, the voltage of the AC load power supply A is zero-crossed,
First, after the triac 3Q is turned on and an inrush load current is supplied from the AC load power supply A to the load L, the switch unit 21 is turned on so as to short-circuit both ends of the triac 3Q. In the case of a load, although an inrush load current flows when the AC load power supply A is turned on,
The negative characteristic thermistor NTC has a high resistance value because it is initially cooled to room temperature, and suppresses the inrush load current to reduce the triac 3
Q can be protected from destruction by inrush load current,
After a while, the negative characteristic thermistor NTC generates heat due to Joule heat due to the load current, becomes high temperature, has a low resistance value, and reduces wasteful power loss.

Thereafter, both ends of the series circuit 5 including the triac 3Q and the negative characteristic thermistor NTC are connected to the contact switch section 21.
Is turned on, the load current flowing through the series circuit 5 of the triac 3Q and the negative characteristic thermistor NTC until immediately before flows through the contact switch section 21 without arcing.

That is, in the hybrid relay device 1 shown in FIG. 2 as described above, compared with the hybrid relay device of the first embodiment described with reference to FIG. An excellent hybrid relay device capable of suppressing the load current and protecting the triac 3Q from being destroyed by the inrush load current can be provided.

Third Embodiment FIG. 3 is a circuit diagram showing a hybrid relay device. The same parts as those in the hybrid relay device of the above-described first embodiment are denoted by the same reference numerals, and detailed description of the same parts will be omitted.

As shown in FIG. 3, the hybrid relay device 1 has input terminals T _{1 and} T ₂ and output terminals T _{3 and} T ₄ . Hybrid relay device 1 includes, in an electromagnetic relay 2 which corresponds to the contact switch mechanism, a semiconductor switch mechanism 3, a resistor R _1, R _2, R _3, negative characteristics as capacitor C _1, which corresponds to a current limiting element And a thermistor NTC.

The electromagnetic relay 2 includes an exciting coil 20, a first contact switch section 21, a second contact switch section 22, which is turned on / off depending on the presence or absence of an exciting current flowing through the exciting coil 20, and a third contact switch section. The contact switch unit 23 is included. When the exciting current flowing through the exciting coil 20 is turned on, the electromagnetic relay 2 turns on the third contact switch section 23,
When the contact switch section 22 and the first contact switch section 21 are turned on in this order and the exciting current flowing through the exciting coil 20 is turned off, the first contact switch section 21, the second contact switch section 22, and the third The contact switches 23 are turned off in this order. The time difference between the ON state of the second contact switch section 22 and the ON state of the first contact switch section 21 is set to a half cycle or more of the AC load power supply A.

The semiconductor switch mechanism 3 includes a triac 3Q corresponding to a semiconductor switch section and a photocoupler 3P. The photocoupler 3P is a light emitting diode 3 corresponding to a trigger portion of a gate of the triac 3Q.
And P _1, configured to include a zero-crossing photo-triac 3-Way _2.

In the hybrid relay device 1 shown in FIG. 3, an exciting coil 20 is provided between the input terminals T _{1 and} T ₂ .
A series circuit of a resistor R ₁ and capacitor C _1, a series circuit of a contact switch 22 and the resistor R ₂ and the light emitting diodes 3-Way ₁ is connected in parallel. Parallel circuit 6 is between the output terminals T _3, T _4, in which the a contact switch 21 a series circuit 5 of the triac 3Q and the negative temperature coefficient thermistor NTC are connected in parallel
And the contact switch unit 23 are connected in series. The gate of the triac 3Q includes a series circuit of a zero-cross type photo-triac 3-Way ₂ and the resistor R _3, the contact switch section 2
3 and through a, connected to the output terminal T _3. As an external connection, a series circuit of a driving power supply E and a driving switch S is provided between the input terminals T _{1 and} T _{2 ,} and an AC load power supply A and a load L are provided between the output terminals T _{3 and} T ₄ . Series circuits are connected to each other. A series circuit of a resistor R ₁ and capacitor C ₁ constitute a charge and discharge circuit.

The hybrid relay device 1 configured as described above operates as follows. That is, when the driving switch S is turned on, the exciting coil 20 is excited, and the contact switch unit 23 is turned on first. At this time, since the contact switch unit 22 is off, no gate current flows through the gate of the triac 3Q, and the triac 3Q is off and the contact switch unit 21 is off. Therefore, when the contact switch 23 is turned on, no load current flows and no arc is generated.

Next, the contact switch section 22 is turned on. Then, a current flows through the resistor R ₂ to the light emitting diodes 3-Way _1, although the light emitting diodes 3-Way ₁ emits light, the current flowing is small, there is no arcing to the contact switch unit 22. At this time, since the contact switch 23 is ON, zero cross type photo triac 3-Way ₂ AC load power supply is turned on in synchronization with the zero crossing of the voltage of the A, to the gate of the triac 3Q resistor R ₃ and the zero-cross type photo-triac a gate current flows through the series circuit of a 3-way _2, triac 3Q is turned in synchronization with the zero crossing of the voltage of the AC load power supply a, inrush load current of triac 3Q from the time when the voltage of the AC load power supply a crosses zero The power supply from the AC load power supply A to the load L is started.

When a capacitive load (such as an inverter-type lighting device or a television set equipped with a switching power supply) is connected as the load L, the capacitive load is charged when the AC load power supply A is turned on. Although the inrush load current flows, the triac 3Q is turned on when the voltage of the AC load power supply A crosses zero, so the inrush load current is suppressed as compared with the inrush load current when the triac 3Q turns on from the time when the voltage does not cross zero. Moreover, the negative characteristic thermistor NTC connected in series with the triac 3Q
Is initially cooled to room temperature and has a high resistance value, so that the inrush load current is further suppressed by the negative characteristic thermistor NTC,
The channel temperature of the triac 3Q is kept below the maximum rating, and the triac 3Q is protected. It should be noted that the negative characteristic thermistor NTC generates heat due to Joule heat due to the load current for a while, and becomes high temperature, has a low resistance value, and reduces wasteful power loss.

Thereafter, although the contact switch 21 is turned on, the contact switch 22 is turned on and the contact switch 2 is turned on.
Since the time difference from the turning on of the switch 1 is more than a half cycle of the AC load power supply A, the triac 3Q is always turned on first, and then the contact switch section 21 is turned on. Accordingly, the ON sequence of the triac 3Q and the contact switch unit 21 can be reliably maintained, and the triac 3
The load current flowing through Q flows through the contact switch section 21 without arcing, and it is possible to reliably prevent arcing when the contact switch section 21 is turned on to extend the life. it can.

On the other hand, when the drive switch S is turned off, the excitation of the excitation coil 20 is stopped and the contact switch section 21 is turned off first. At this point, a contact switch 23 is turned on and the contact switch 22 is turned on, the light emitting operation of the light emitting diodes 3-Way ₁ capacitor C ₁
, The triac 3Q is on, the contact switch 21 can be turned off without arcing, and the load current flowing through the contact switch 21 can be transferred to the triac 3Q.

Next, the contact switch section 22 is turned off. At this point, the contact switch unit 23 is on, and the load current is flowing through the series circuit 4 of the triac 3Q and the negative characteristic thermistor NTC.
Emitting diodes 3-Way ₁ since 2 is off and stops emitting light, is blocked gate current of the triac 3Q, triac 3Q is because it is a semiconductor and off without arcing, the load current is interrupted. The gate current of the triac 3Q is a small current, and the contact switch unit 22 can be turned off without arcing.

Next, the contact switch section 23 is turned off. At this point, both the contact switch section 21 and the triac 3Q are off, and the load current is cut off except for a small leak current flowing through the triac 3Q.
Therefore, no arc is generated even when the contact switch 23 is turned off, and a slight leak current flowing through the triac 3Q due to the turning off of the contact switch 23 can be completely eliminated.

That is, in the hybrid relay device 1 as described above, the power from the load power supply A to the load L is generated by turning on / off the drive switch S without arcing of the contact switch sections 21, 22, and 23. The power supply can be turned on / off, and the triac 3Q can be protected from destruction due to an inrush load current, so that it can be small, have a high capacity, and have a long life.

[0047]

According to the first aspect of the present invention, it is possible to protect the semiconductor switch section by suppressing the inrush load current when the load power is turned on, and to determine the on / off execution order of the contact switch section and the semiconductor switch section. Ensuring that the ON / OFF timing difference is sufficiently ensured to prevent the occurrence of arcs in the contact switch unit, eliminating wear due to the arc of the contacts, achieving a small size, high capacity, and a long life. This has the effect of providing an excellent hybrid relay device.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, an excellent hybrid relay which can further suppress the inrush load current when the load power is turned on and can further protect the semiconductor switch portion. This has the effect that the device can be provided.

According to the third aspect of the invention, in addition to the effect of the second aspect of the present invention, both ends of the series circuit of the semiconductor switch section and the negative temperature coefficient thermistor are turned on or off by the contact switch section. Is an excellent hybrid relay device in which the voltage between both ends of a series circuit of a semiconductor switch section and a negative temperature coefficient thermistor drops below an arc generation voltage to prevent arc generation in a contact switch section, thereby achieving high capacity and long life. Is provided.

According to the fourth aspect of the present invention, the rush load current when the load power is turned on can be suppressed to protect the semiconductor switch portion, and the wear of the contact of the contact switch mechanism due to the arc can be eliminated. This has the effect of providing an excellent hybrid relay device that can achieve high capacity, prolong the service life, and block leakage current.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a hybrid relay device according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a hybrid relay device according to a second embodiment of the present invention.

FIG. 3 is a circuit diagram showing a hybrid relay device according to a third embodiment of the present invention.

FIG. 4 is a circuit diagram showing a conventional hybrid relay device.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 hybrid relay device 2 contact switch mechanism 20 excitation coil 21 contact switch section (first contact switch section) 22 second contact switch section 23 third contact switch section 3 semiconductor switch mechanism 3P ₁ trigger section 3Q semiconductor switch section 4 Excitation coupler 41 Excitation switch section 42 Excitation gate section 5 First circuit 6 Second circuit A AC load power supply L Load NTC Negative characteristic thermistor

Claims (4)

[Claims] A contact switch having a contact switch turned on / off by an exciting current flowing through an exciting coil; and a semiconductor switch having a semiconductor switch turned on / off by a zero-crossing gate current. The contact switch section includes the semiconductor switch section in parallel, and is connected to the semiconductor switch so that an arc does not occur in the contact switch section when power supply from an AC load power supply to a load is turned on / off. A hybrid relay device that controls on / off of a section, wherein an excitation switch section connected in series to the excitation coil, and the excitation switch section when the zero-cross type gate current for turning on the semiconductor switch section passes. And an excitation gate section for turning on the power supply. Hybrid relay and wherein the door. 2. A first circuit in which a current limiting element is connected in series to the semiconductor switch section is formed.
2. The hybrid relay device according to claim 1, wherein a second circuit in which said contact switch section is connected in parallel to said circuit is formed. 3. The hybrid relay device according to claim 2, wherein said current limiting element is a thermistor having a negative characteristic. 4. A contact switch mechanism having a plurality of contact switch units turned on / off by an exciting current flowing through an exciting coil, and a semiconductor switch mechanism having a semiconductor switch unit turned on / off by a zero-cross type gate current. , A first contact switch section is connected including the semiconductor switch section in parallel, a second contact switch section is connected in series with a trigger section of the semiconductor switch section, and a third contact switch section is connected. Is connected so that a load can be cut off without a leak current when turned off, and the semiconductor is connected so that an arc does not occur in the contact switch unit when power supply from an AC load power supply to the load is turned on / off. A hybrid relay device that controls on / off of a switch unit, wherein the semiconductor switch unit has a negative characteristic thermistor. And a second circuit in which the first contact switch section is connected in parallel with the first circuit, and each contact switch section when the exciting current is turned on. The ON operation delay time of the first contact switch section, the second contact switch section, and the third contact switch section are shortened in this order, and the OFF operation delay of each contact switch section when the exciting current is turned off. The time is made longer in the order of the first contact switch section, the second contact switch section, and the third contact switch section, and when the excitation current is turned on, the first contact switch section is turned on and the second contact switch section is turned on. Wherein the time difference between turning on of the contact switch unit and the turning on of the contact switch unit is at least half a cycle of the AC load power supply.