KR20100039318A

KR20100039318A - An arc remover and a hybrid switch

Info

Publication number: KR20100039318A
Application number: KR1020100020111A
Authority: KR
Inventors: 허진
Original assignee: 허진
Priority date: 2010-03-05
Filing date: 2010-03-05
Publication date: 2010-04-15
Also published as: KR20110101076A; KR20100044760A

Abstract

An electrical parallel connection with a relay or a circuit breaker provides a method for removing an arc occurring between the contacts of the relay, an arc remover, and a hybrid switch including a method used for an arc remover.

Description

An arc remover and a hybrid switch

The present invention relates to the arc control technology of high voltage high current contact relays and breakers.

The present invention relates to relays, contactors (contact relays), semiconductor relays, circuit breakers. Relays normally open and close signals and power. Contactors are very large relays used to drive motors, heaters and light bulbs. Devices with a capacity of 15 A or more or thousands of watts or more are called contactors. Additional Options Except for additional low current contactors, they are made almost exclusively with normally open contactors. Unlike relays, contactors are designed with the ability to suppress and control the arcing that occurs when breaking large motor currents. An unavoidable arc upon blocking leads to oxidation of the contacts, which are made of silver alloys (AgSnO ₂ , AgCdO ₂ ). This is because the oxide of silver alloy is still a good conductor. The physical size of the contactor ranges from a small size that can be lifted with one hand to a large size that is approximately 1 meter laterally.

The physical phenomenon of the arc is described as follows. When charge accumulates on the surface of an object, an electric field is generated in the surrounding medium, which causes the Coulomb force to act on another object in the electric field, and when it reaches a limit, the medium reads electrical insulation and becomes conductive. When discharge occurs, electromagnetic radiation, sound, and light are generated accordingly. Discharge types include spark discharge, brush discharge, corona discharge, and propagating brush discharge. Spark discharges are discharges that convert very quickly the energy that has been charged by complete dielectric breakdown of the medium in a uniform electric field. Brush discharge A discharge in which a discharge occurs at a part exceeding the dielectric strength in part of an uneven electric field. Corona discharge is a type of brush discharge that is a weak discharge in which the local breakdown of the medium breaks down in a more severely uneven electric field. Propagating brush discharge occurs in a charge bilayer consisting of positive and negative charges several times the maximum surface charge density on both sides of a thin insulator such as a film. The dielectric strength of air is about 3 kV / mm, and the surface charge density is about 2.7x10 ^-2 C / m ² . Electrostatic discharge occurs when the charge density on the surface of the charge is about 10 ⁻⁶ or more. That is, since the distance between the contacts is far from zero at the time of interruption, when the distance between the contacts is very close, a spark discharge occurs, and ions and particles of the electrode due to ionization of the medium pop out. For example, spark discharge occurs when the spacing of the contacts is within 2/15 mm when the 400V battery power is turned off. As a result, even when the distance between the contacts is increased, the local dielectric strength is low through ionization due to ionization in the medium, thereby maintaining the brush discharge form. Thus, as the distance between the contacts increases, the arc can start in flame discharge and remain in brush discharge form.

Since the arc in the atmosphere is an ionized gas at high temperature, the arc control is finally reduced from the ionized state to the insulator by cooling. This removal of the ion is called SOHO. At voltages of 30 V or more, discharge starts within 1/100 mm. As the separation distance between the electrodes increases, ions are quickly cooled and extinguished by the electrodes, making it difficult to generate an arc. However, in a contactor with a limited distance between the contacts, it is quite difficult to extinguish it in the atmosphere when the voltage is more than 3kV and the current is more than thousands of amps. Therefore, the control of the arc is important. On the other hand, arc extinguishing by direct current is more difficult than alternating current where current passes through zero. Existing extinguishing methods currently used for blocking include cooling by using a gas generated by an arc, expanding ions in a vacuum state, blowing ions in a direction, increasing internal pressure of the arc chamber, and arcing. There is a method of subdividing and using the arc driving force of the magnetic field. Both of these methods result in a reasonable increase in the recovery of the rapid dielectric strength between poles in the event of a break. In practice, the breaker or contact relay combines several methods to improve the breakdown performance.

The high voltage contactor is surrounded by vacuum or an inert gas surrounding the contact electrodes to prevent oxidation of the contacts by the arc. The contacts carry the current from the contactor. This includes power contacts and a contact spring. The electromagnets provide the driving force for contacting the contacts. There is a cover surrounding the contacts and the electromagnet connection and the connections with the terminals and contacts for connection with the external system. The cover is made of Bakelite, Nylon 6, and thermosetting plastics to protect and insulate the contacts and to prevent people from touching them. Open cover contactors may have additional covers to protect against dust, oil, explosion hazards and climate.

Sometimes saving circuitry is also installed to reduce the power required to keep the contactor closed. Additional contact reduces coil current after the contactor is closed. Closing the contactor initially requires significantly more power than keeping it closed. The saving circuit can save a lot of power and keep the drive coil cool. Saving circuits are almost always applied to direct-current contactor coils and to large alternating current contactor coils.

Most motor control contactors operating at low voltages (below 600V) are air insulated contactors. Modern medium voltage motor controllers use vacuum contactors. Motor control contactors must match the fixtures for mounting them to make short circuit protection, heat exchange means, overload relays and combined starters

In the sixties, a circuit breaker operated with insulating oil was used to control the arc at the time of breaking. In general, the surrounding insulating oil is decomposed by an arc generated when the current is interrupted to generate gases such as hydrogen, acetylene, methane, and ethane. 50-70% of the composition ratio of these gases is hydrogen, but the hydrogen gas is light and the thermal conductivity is very high even at a high temperature of about 4000 ° K.

Magnetic arcs use magnetic fields to lengthen arcs and use blown coils or permanent magnets to move arcs into arc chambers. The extinguishing chamber is made of an arc resistant insulating material such as zircon powder material, and the arc is cooled by ionic extinction to cut off the current. Current magnetic circuit breaker stacks a subplate of heat-resistant magnetic material with inverted V-shaped grooves in an appropriate number of sheets, installs a blowing coil and a magnetic pole, and flows an arc current to the blowing coil to create a magnetic field, which makes the magnetic field induced by the magnetic field and the arc. The arc is blown into the extinguishing chamber by (in this case, the arc is considered to be a current-carrying conductor and the Fleming's left-hand rule is applied to indicate the direction of motion of the arc). In the case of a magnetic circuit breaker, a high temperature arc reaches the surface of the arc board of the heat-resistant magnetic and becomes a cooling ion by thermal conduction. In order to effectively effect such cooling, the material of the arc board, the shape of the reverse V-shaped groove, the number of turns of the blowing coil, the installation position, etc. must be taken into consideration. On the other hand, by filling the high thermal conductivity of hydrogen, the cooling effect is further enhanced. The arc extinguishing principle of the arc chute is basically a cooling effect as described above, but another advantage related to arc extinguishing is the current-limiting wave effect of dividing one large arc into smaller arcs.

Vacuum circuit breaker is a circuit breaker that operates the circuit breaker in high vacuum. The insulation resistance in the high vacuum is very high and the extinguishing action by the diffusion of metal vapor or charge particles is outstanding. To block. When the pressure is gradually decreased from the atmospheric pressure, the dielectric strength decreases initially, but when the pressure is again applied, the dielectric strength increases. In a vacuum of 10 ^-3 Torr or less, the free stroke of electrons reaches several meters, so the generated arc is a neutral metal vapor atom, positive and negative charge, which starts from the cathode, not by electron collision. The high pressure arc vapor, which fills the core of the arc main in the vacuum valve, rapidly diffuses into the low pressure pipe wall of 10 ^-4 Torr or less. If the amount of neutral metal vapor atoms, cations and anions supplied from the cathode is less than the amount diffused in the vacuum during the opening and closing of the vacuum circuit breaker, the arc between the contacts cannot be maintained. The block is completed. If it is less than 10 ^-4 Torr, almost constant dielectric strength (100kV / mm when using tungsten electrodes) can be obtained regardless of pressure, and this vacuum area can be used to shorten the stroke of the contact of the vacuum circuit breaker to about 6-16mm.

This vacuum circuit breaker is small in size, light in weight, non-flammable and noise-free, and has a long service life, so it has excellent function and breaking performance of a high speed high frequency switch which is basically required as a breaker.

The contact shape of the vacuum circuit breaker has been studied in various ways to facilitate the arc extinguishing. The oblique grooved structure of the contactor is to facilitate the arc extinguishing by bending the charge path. As a result, localized heating phenomenon of the contact surface is eliminated, and the surface consumption state becomes uniform. If the surface of the contactor is kept uniform, the breakdown voltage characteristics between the poles can be improved and the distance between the contacts can be reduced.

For arc control using inert gas, SF ₆ gas with intrinsic arc time constant of less than 1/100 of air due to its unique thermochemical and remarkable electrical characteristics is used because of its excellent insulation and extinguishing performance and excellent recovery characteristics. The extinguishing power is about 100 times that of air, so the SF ₆ gas circuit breaker needs to supply as much fresh SF ₆ gas molecules as possible to the generated plasma space, so that the arc is blown through the nozzle or electronically rotated to make the arc fresh. Guide to the gas molecule region.

SF ₆ gas, which is currently applied to ultra-high voltage transformers, is widely used as an insulation medium of ultra-high voltage equipment, but has a disadvantage of being expensive, liquefied at low temperature and high pressure, and causing greenhouse effect when released into the atmosphere. With the recent increase in environmental concerns and regulations, the Kyoto Protocol as a regulation on greenhouse gases has been officially entered into force, and SF ₆ gas is highly likely to be regulated in the future due to total restrictions. Therefore, an insulating medium mixed with SF ₆ gas and Air, N ₂ , CO ₂ , N ₂ / O ₂ syngas, He, etc. has been studied as an alternative. The greatest dual cooling effect is He, but also has the disadvantage of high price.

Semiconductor contact relays are large-capacity semiconductor switches with heat sinks used to drive motors, heaters, and bulbs that often need to switch electrical connections. Since there is no moving part, there is no mechanical wear and no electrical contact vibration by vibration without sparks. Compared with mechanical relays, when the semiconductor switch operates in saturation, the semiconductor contact relay causes a voltage drop of about 1.5V. At this time, the power consumption generates heat corresponding to the product of the voltage drop value and the conduction current value. Therefore, an appropriate heat sink must be installed. Heat sinks, which require heat sinks to be proportional to the current capacity, do not allow small and light manufacturing of large capacity semiconductor contact relays. On the other hand, a conventional intelligent power semiconductor switch includes current sensor means for providing an electrical sensor signal proportional to the total current flowing through the semiconductor switch. The following is a summary of the advantages and disadvantages of semiconductor relays versus mechanical relays.

Advantages

1. Semiconductor relays are faster than electromechanical relays; Their switching time depends on the microsecond to millisecond time required to turn the LED on and off.

2. No moving parts, no wear

3. There is no side effect caused by vibration and it operates cleanly and without electric shaking.

4. When switching, there is no arc, so the electric noise is reduced.

5. Can be used in explosion environments where sparking should not occur when switching

6. Operates completely quietly

7. Can continue to operate under severe vibration

Disadvantages

1. When conducting, the voltage drop is bigger than that of the mechanical and electronic contact relay, which generates a lot of heat, requiring a large heat sink.

2. Shorter faults than electromechanical contact relays

3. Electrical noise increases when challenged

4. There is low resistance and reverse leakage current (level) during electrical disconnection.

5. There may be a malfunction due to a transient voltage.

6. Requires isolated semiconductor gate drive power supply

In the case of contact relays or contact breakers, arc control is very important in the blocking of direct current, as opposed to the blocking of alternating current in which the current or voltage passes through zero. Investigations have been made on the use of insulating oil, blown, blown with magnetic fields, the use of an arc-extinguishing chamber with an arc board, vacuum cut-off, and gas cut-off for arc control that hinders the breaking voltage and shortens its life. come. On the other hand, a semiconductor contact relay that does not generate an arc has a disadvantage in that a large heat sink is required due to a large voltage drop and a large amount of heat, compared to a mechanical and electronic contact relay. It is an object of the present invention to provide a method capable of making a small and light contact high voltage and high current contact relay for automobiles and a relay manufactured by the method.

The construction principle of the arc eliminator according to the present invention will be described with reference to FIG. 1.

The arc eliminator according to the present invention comprises two terminals (10, 20) for facilitating electrical connection between the external system and the present invention; Terminals 51 and 52 to which an electrical signal for opening and closing an electrical connection between two terminals 10 and 20 is connected; A semiconductor switch 30 electrically connected to the two terminals 10 and 20 and capable of being electrically opened and closed in dependence on the electrical signal; Depending on the electrical signal, the semiconductor switch 30 is electrically closed at a specific time Ton from the time of the electrical signal change, and the semiconductor switch 30 is electrically connected at the specific time Toff from the time of the electrical signal change depending on the electrical signal. An open semiconductor switch driver 50; The frame 60 which prevents damage caused by the heat generation of the semiconductor switch 30 and mechanically arranges and connects the contact elements 10, 20, 51, 52, 30, and 50 to the contact relays is provided. It is characterized by including.

Referring to the preferred embodiment of the arc eliminator according to the present invention illustrated in FIG.

The semiconductor switch 30 is electrically open, is spaced at an arc-free distance between the fixed contact 70 and the movable contact 80, and is fixed in an initial state in which a voltage is applied between the terminals 10 and 20. Consider a process of approaching the mobile contact 80 in the direction of contact 70. When the contact type relay drive device 90 is operated in the initial state and is converted from the spaced state to the contact state depending on the electrical open / close signals applied to the terminals 51 and 52, the fixed contact 70 may be used as a reference to the open / close signal. Let T_spark be the time at which the arc starts to occur between the c) and the mobile contact 80. In this case, a distance between the fixed contact 70 and the movable contact 80 will be referred to as d_spark with reference to FIG. 3. Where d_spark depends on the voltage (V) between the terminals (10, 20) and the shape of the fixed contact 70 and the movable contact 80, the shape of the fixed contact 70 and the movable contact (80) Assuming planes, there is a relationship of d_spark = voltage (V) / 3 (kV / mm) in air. For example, if the voltage between the terminals 10, 20 in the electrically open state is 300 V, the value of d_spark is about 1/10 mm. T_spark depends on the driving method of the contact relay driving device 90, and can be obtained experimentally. On the other hand, when time comes into contact, the arc generated at time T_spark disappears. In a relay driven by an electromagnet type, the time from T_spark to the contact state is very short so that deterioration of the contacts can be neglected during this time. In the contact state, the voltage between the terminals 10 and 20 is a product of the contact resistance Ω of the fixed contact 70 and the mobile contact 80 and the current A flowing.

Now, the operation principle of the present invention in which no arc is generated will be described with reference to FIG. 2. In the initial state, the contact type relay driving device 90 operates depending on the electrical switching signals applied to the terminals 51 and 52 to move the movable contact 80 in the initial spaced state to move with the fixed contact 70. Consider a semiconductor switch driver 60 that changes the semiconductor switch 30 from an electrically open state to a closed state when the separation distance d of the contact 80 is d_spark. Since the operation speed of the semiconductor switch 30 is very fast, a voltage is conducted between the terminals 10 and 20 at the separation distance d (= d_spark) between the fixed contact 70 and the mobile contact 80 with the semiconductor saturated. The voltage is about 1.5V and no arc occurs. The time from the T_spark to the contact state of the semiconductor switch 30 is very short, and during this time, the total amount of heat generated even when the semiconductor switch 30 operates in a saturated state is very small.

When the semiconductor switch 30 is closed in the contact state, the voltage V between the terminals 10 and 20 is caused by the contact resistance (Ω) of the fixed contact 70 and the mobile contact 80 and the current A flowing. Not greater than Thus, if the contact resistance of the contacts is small enough, most of the current will flow through the contact without passing through the semiconductor switch 30. For example, if the contact resistance is 1 mΩ and the current flowing through the contact is 500 A, the voltage between the terminals 10 and 20 will be 0.5 V, and the closed semiconductor switch 30 has almost no current, so that the semiconductor switch ( At 30), little heat is generated.

Now, the contact relay driving device 90 operates in response to the electrical switching signals applied to the terminals 51 and 52 in the contact state and the semiconductor switch 30 is closed to convert from the contact state to the spaced state. Consider a process in which the semiconductor switch driving device 60 operates. When measured from the time T_move at which the mobile contact 80 starts to move, it is assumed that the distance d between the fixed contact 70 and the mobile contact 80 becomes d_spark. Consider a semiconductor switch driving device 60 that changes the semiconductor switch 30 from an electrically closed state to an open state at time T_off (= T_move + T_open). At the time T_move when the mobile contact 80 starts to move, the current flowing through the semiconductor switch 30 increases rapidly. Therefore, when the current flowing through the semiconductor switch 30 is detected, the time corresponding to T_move can be detected automatically. Even when the distance d between the fixed contact 70 and the movable contact 80 is small (d <d_spark), the voltage V between the terminals 10 and 20 is about 1.5, which is a voltage that conducts the semiconductor in a saturated state. It becomes V and no arc occurs. When the semiconductor switch 30 is opened, since the separation distance d (> d_spark) between the fixed contact 70 and the movable contact 80 is sufficiently large, spark discharge does not occur between the contacts, and thus no arc is generated. . This is in contrast to conventional arc phenomena where a brush arc or corona discharge continues even when the separation distance d (> d_spark) is sufficiently large because the ions generated by the spark discharge generated when the electrode arc is small in the electrode gap are sufficiently large. to be. At this time, since the current mainly flows through the contacts having a small contact resistance during T_move, since the semiconductor switch 30 operates in a saturation state only during T_open, heat is generated, but the time is so short that the total amount of heat is very small.

On the other hand, the operating principle of the present invention that allows only the arc discharge for a very short time will be described with reference to FIG.

A voltage is applied between the terminals 10 and 20, the semiconductor switch 30 is electrically open, and the fixed contact 70 and the movable contact 80 move with the fixed contact 70 in an initial state where the contact state is in contact. Consider the process of spacing the contacts 80. In accordance with the electrical signals applied to the terminals 51 and 52 in the initial contact state, the contact relay driving device 90 operates to switch from the contact state to the spaced state. At this time, when the mobile contact 80 starts to move based on the electrical signal, the spark discharge starts. Even though the separation distance d between the fixed contact 70 and the mobile contact 80 is sufficiently larger than d_spark, since the charged particles made by the spark discharge exist, a region having a low dielectric strength exists and the brush discharge may be maintained. Here, consider a case where the electrically open semiconductor switch 30 is closed and opened for a short time, T_close. From the time when the open / close signal becomes 1 to 0, the semiconductor switch 30 is kept open from the time T_move + T_open, and after the time T_move + T_open, the semiconductor switch (T_move + T_open + T_close) before the time (T_move + T_open + T_close). Consider a semiconductor switch driving device 50 that keeps 50 closed and maintains its open state after the time T_move + T_open + T_close. When the semiconductor switch 30 is closed, the voltage V between the terminals 10 and 20 drops to about 1.5 V of the semiconductor saturation voltage, so that the arc between the fixed contact 70 and the mobile contact 80 disappears and air is lost. Insulation strength is restored. When the semiconductor switch 30 is opened again, the terminals 10 and 20 are electrically opened. Here, T_close is closely related to the time at which the plasma is killed. During T_close, a large amount of current is generated because a lot of current flows in the semiconductor switch 30, but T_close is very short, so the total amount of heat is very small.

In both the operating principle of the present invention that does not generate an arc and the operating principle of the present invention that allows only arc discharge for a very short time, the time from T_spark to contact, and T_open and T_close are all very short and are assumed to be approximately 1 ms for 1 second. Less than 1 / 1000th of calorific value during saturation conduction Therefore, even if the heat dissipation capacity is only 1/1000 level than the case of using the semiconductor contact relay, it is possible to manufacture a relay without arc generation. That means you don't need a heat sink.

The configuration principle of the hybrid switch according to the present invention will be described with reference to FIGS. 4 and 5.

4 is a conceptual diagram of a hybrid switch according to the present invention including an arc elimination method according to the present invention. Referring to FIG. 4, the hybrid switch according to the present invention includes two power terminals 10 and 20 for facilitating electrical connection between an external system and the present invention; Opening and closing signal terminals 51 and 52 to which an electrical opening and closing signal for opening and closing an electrical connection between two power terminals 10 and 20 is connected; A semiconductor switch 30 electrically connected to the two terminals 10 and 20 and capable of being electrically opened and closed in dependence on the electrical opening / closing signal; A semiconductor switch driver 50 electrically closing the semiconductor switch 30 after a specific time Ton from a time point of the change of the electrical open / close signal and electrically opening the semiconductor switch 30 after a time Toff from the time of the electrical open / close signal change; A fixed contact 70 connected to the terminal 10 by a conductor and fixed thereto; A movable contact 80 connected to the terminal 20 by a conductor and movable; The movable contact 80 is moved depending on the electrical opening and closing signal to convert the fixed contact 70 and the movable contact 80 into a contact state in a spaced apart state, and the movable contact 80 is moved in the contact state to fix the fixed contact ( A contact relay driving device 90 for converting the 70 and the movable contact 80 into a spaced state; The frame 60 which prevents respective damages due to heat generation of the semiconductor switch 30 and mechanically arranges and connects the components 10, 20, 51, 52, 30, 50, 70, 80 and 90 of the present invention. It is characterized by including). A preferred embodiment of a hybrid switch is illustrated in FIG. 5 to illustrate the principle of operation, the principle of operation of which is the same as that of the preferred embodiment of the arc eliminator of FIG.

Electrically connecting the arc eliminator according to the present invention in parallel with the contact relay completely eliminates the arc occurring between the contacts of the relay, or at least allows only the arc to increase the electrical life of the relay. On the other hand, the hybrid switch according to the present invention provides a power switch small and light by allowing no arc or only a minimal arc without a large heat sink.

1 is a conceptual diagram of the arc eliminator
2. Preferred Embodiment of the Arc Eliminator
Figure 3. Distance between the sparks
4 is a conceptual diagram of a hybrid switch
5. Preferred Embodiment of the Hybrid Switch

T_spark, T_move, T_open, and T_close all depend on the shape of the contacts and the driving method of the moving contact, but normally the relay has an operating frequency of 8 ms or less, so the following T_spark (~ 3ms), T_move (~ 1ms), T_open (~ 1ms), T_close (~ 1ms) the present invention operates.

10, 20 ~ two power terminals to facilitate electrical connection with external systems and the present invention
A semiconductor switch that is connected to 30 to two terminals 10 and 20 by a conductor and that can be electrically opened and closed depending on the electrical open / close signal.
50 ~ The semiconductor switch driver electrically closes the semiconductor switch 30 after a certain time Ton from the time of the change of the electrical open / close signal, and electrically opens the semiconductor switch 30 after the time Toff from the change of the electrical open / close signal.
51, 52 ~ two open / close signal terminals to which an electrical open / close signal is connected to open or close an electrical connection between the two power terminals 10, 20.
60 ~ The heat dissipation function of the semiconductor switch 30 to prevent damage caused by heat, and the frame to mechanically arrange and connect the components (10, 20, 51, 52, 30, 50) and the contact relay

Claims

Two power terminals (10, 20) for facilitating electrical connection between an external system and the present invention;
Two open / close signal terminals 51 and 52 to which an electrical open / close signal for opening and closing an electrical connection between the two power terminals 10 and 20 is connected;
A semiconductor switch 30 electrically connected to the two terminals 10 and 20 and capable of being electrically opened and closed in dependence on the electrical opening / closing signal;
A semiconductor switch driver 50 electrically closing the semiconductor switch 30 after a specific time Ton from a time point of the change of the electrical open / close signal and electrically opening the semiconductor switch 30 after a time Toff from the time of the electrical open / close signal change;
The heat dissipation function of the semiconductor switch 30 prevents damage caused by heat, and the frame 60 mechanically arranges and connects the components 10, 20, 51, 52, 30, and 50 of the invention to a contact relay. Relay arc eliminator characterized in that it comprises

Two power terminals (10, 20) for facilitating electrical connection between an external system and the present invention;
Opening and closing signal terminals 51 and 52 to which an electrical opening and closing signal for opening and closing an electrical connection between two power terminals 10 and 20 is connected;
A semiconductor switch 30 electrically connected to the two terminals 10 and 20 and capable of being electrically opened and closed in dependence on the electrical opening / closing signal;
A semiconductor switch driver 50 electrically closing the semiconductor switch 30 after a specific time Ton from a time point of the change of the electrical open / close signal and electrically opening the semiconductor switch 30 after a time Toff from the time of the electrical open / close signal change;
A fixed contact 70 connected to the terminal 10 by a conductor and fixed thereto;
A movable contact 80 connected to the terminal 20 by a conductor and movable;
The movable contact 80 is moved depending on the electrical opening and closing signal to convert the fixed contact 70 and the movable contact 80 into a contact state in a spaced apart state, and the movable contact 80 is moved in the contact state to fix the fixed contact ( A contact relay driving device 90 for converting the 70 and the movable contact 80 into a spaced state;
The frame 60 which prevents damage caused by the heat generation of the semiconductor switch 30 and mechanically arranges and connects the components 10, 20, 30, 50, 51, 52, 70, 80, and 90 of the present invention. Hybrid switch, characterized in that

The method according to claim 1 or 2, wherein after the open / close signal changes from 1 to 0, T_on is before the time T_move at which the fixed contact 70 and the movable contact 80 start to be separated, and T_off is the fixed contact 70. ) And an arc eliminator and hybrid switch characterized in that the semiconductor switch driver 50 is formed after the time (T_move + T_open) at which the separation distance between the contact point 80 and the moving contact 80 is greater than or equal to d_arc.

According to claim 1 and 2, after the open and close signal changes from 0 to 1, T_on is before the time T_arc when the distance d during the approach of the fixed contact 70 and the mobile contact 80 decreases to become d_arc, After the signal changes from 1 to 0, T_off is characterized in that the semiconductor switch driver 50 after the time (T_move + T_open) when the distance d between the fixed contact 70 and the mobile contact 80 becomes larger than d_arc Arc Eliminator and Hybrid Switch

According to claim 1 and 2, after the opening and closing signal is changed from 1 to 0, T_on is after the time (T_move + T_open) when the separation distance d between the fixed contact 70 and the movable contact 80 is greater than d_arc. , T_off is an arc eliminator and hybrid switch characterized in that the semiconductor switch driver 50 after the arc is removed (T_move + T_open + T_close)