CN2672829Y - DC electronic arc extinguisher - Google Patents

Abstract

The utility model discloses a DC electronic arc extinguisher, which belongs to the terminal field of low-voltage electrical appliance protection. The DC electronic arc extinguisher is composed of a shell, a power supply control circuit, a time delay circuit, an IGBT drive circuit, a High frequency oscillating circuit, a push circuit, a light coupled circuit, a main loop circuit, etc., wherein a wire connecting terminal of a main loop in the shell is connected with the insulated-gate bipolar transistor IGBT. A wire connecting terminal of the power supply control circuit is connected with a full bridge rectification circuit of rectification diodes D10 to D13. A load wire connecting terminal is connected with the insulated-gate bipolar transistor IGBT and voltage dependent resistors Y1, Y2. The DC electronic arc extinguisher takes the profile of a large-power electric power semiconductor module; all electronic components are sealed in the plastic outer shell which is filled and poured with silicon rubber with high insulating strength to avoid the outer shell electrifying and to ensure safety and reliability. The utility model can be conveniently connected in parallel with a DC contactor to eliminate electric arc generated at the moment when the DC contactor is closed or disconnected for protecting contact heads and prolonging the service life of the DC contactor. The DC electronic arc extinguisher avoids device failures and personnel safety accidents.

Description

The DC electronic extinguisher

Affiliated technical field

The utility model relates to a kind of DC electronic extinguisher, belongs to low-voltage electrical apparatus resist technology field.

Background technology

Electric switch is in closure or disconnect moment, can produce surge current, produces electric arc between the contact, uses repeatedly and will damage even burn to death contact, thereby cause equipment fault or initiation fire; Traditional arc-control device generally adopts arc-extinguish chamber and capacitance-resistance loop etc., and arc-extinguish chamber can only cut off arc light and can not protect contact, and the arc quenching effect of capacitance-resistance blow-out circuit is not thorough yet, still can reduce the electric switch life-span and cause equipment fault.

Summary of the invention

In order to overcome above-mentioned deficiency; the utility model provides a kind of DC electronic extinguisher; it is the integrated module structure that constitutes by insulated gate bipolar transistor IGBT and relevant control circuit; use in parallel with D.C. contactor; eliminate D.C. contactor at electric arc closed or disconnection moment generation; protected contact, prolonged the life-span of D.C. contactor, reduced equipment fault and avoided the personal safety accident.

The technical scheme in the invention for solving the technical problem is: it is made of housing, major loop binding post, control power circuit binding post, load wiring terminal, control power circuit, delay circuit, IGBT drive circuit, high-frequency oscillating circuits, promotion circuit, optically coupled circuit, main loop circuit etc., be cuboid, whole electronic devices and components of DC electronic extinguisher are contained in the housing, and housing is equipped with major loop binding post, control power circuit binding post and load wiring terminal outward; D.C. contactor binding post and load wiring terminal are connected in parallel; The major loop binding post connects insulated gate bipolar transistor IGBT in housing, and control power circuit binding post meets rectifier diode D ₁₀-D ₁₃Full bridge rectifier, load wiring terminal and insulated gate bipolar transistor IGBT and piezo-resistance Y ₁, Y ₂Be connected.Enclosure interior is filled the silicone rubber seal of embedding high insulation resistance, and DC electronic extinguisher and D.C. contactor, load are connected in parallel; The DC electronic extinguisher is made of control power circuit, delay circuit, IGBT drive circuit, high-frequency oscillating circuits, promotion circuit, optically coupled circuit, main loop circuit etc.; Wherein, the control power circuit is by K switch, rectifier diode D ₁₂-D ₁₃Being linked to be full bridge rectifier reaches by voltage stabilizing didoe D ₂, resistance R ₅, resistance R ₆, resistance R ₇Constitute, be connected with the D.C. contactor coil with other all circuit; High-frequency oscillating circuits is by integrated circuit block NE555, resistance R ₁, resistance R ₂, capacitor C ₂, capacitor C ₃Constitute, be connected with the promotion circuit; Promote circuit by semiconductor triode BG, capacitor C ₄, resistance R ₃Constitute, be connected with the IGBT drive circuit; The IGBT drive circuit is by high frequency transformer B1, rectifier diode D ₆-D ₉Full bridge rectifier constitutes, and is connected with main loop circuit; Optically coupled circuit is a two-way, a route optical coupler 1/2AQW216, diode D ₃, voltage stabilizing didoe D ₄, resistance R ₁₅Constitute another route optical coupler 1/2AQW216, voltage stabilizing didoe D ₅, resistance R ₁₀, resistance R ₁₃, capacitor C ₅Constitute, be connected with main loop circuit; Main loop circuit is by two insulated gate bipolar transistor IGBTs, resistance R ₁₆, resistance R ₁₂, piezo-resistance Y ₁, piezo-resistance Y ₂Constitute, with the major loop binding post, load wiring terminal D.C. contactor binding post is connected.

The beneficial effects of the utility model are: adopt shape outside the high-power electric semiconductor module, all electronic devices and components are sealed in the plastic casing, fill the silicon rubber of embedding high insulation resistance, avoid outer casing electrification, guarantee safe and reliable; Can use in parallel with D.C. contactor easily, eliminate D.C. contactor closed or disconnect the electric arc that moment produces, the protection contact prolongs life-span of D.C. contactor, has avoided equipment fault and personal safety accident.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the schematic perspective view of the utility model DC electronic extinguisher.

Fig. 2 is the winding diagram of DC electronic extinguisher and D.C. contactor.

Fig. 3 is circuit theory diagrams.

Number in the figure

1, DC electronic extinguisher 2, D.C. contactor 3, load

4, housing 5, main loop circuit 6, control power circuit

7, delay circuit 8, high-frequency oscillating circuits 9, IGBT drive circuit

10, promote circuit 11, optically coupled circuit 12, major loop binding post

13, major loop binding post 14, control power circuit binding post

15, control power circuit binding post 16, load wiring terminal

17, load wiring terminal 18, D.C. contactor binding post

19, D.C. contactor binding post

Embodiment

See also Fig. 1 to Fig. 3, it is cuboid by housing (4), major loop binding post (12,13) control power circuit binding post (14,15), load wiring terminal (16,17), control power circuit (6), delay circuit (7), high-frequency oscillating circuits (8), IGBT drive circuit (9), promotion circuit (10), optically coupled circuit (11), main loop circuit formations such as (5).In Fig. 1 and Fig. 2, whole electronic devices and components of DC electronic extinguisher (1) are contained in the housing (4), and major loop binding post (12,13) connects insulated gate bipolar transistor IGBT, and control power circuit binding post (14,15) meets D ₁₀-D ₁₃Full bridge rectifier, load wiring terminal (16,17) and insulated gate bipolar transistor IGBT and piezo-resistance Y ₁, Y ₂Be connected, enclosure interior is filled the silicone rubber seal of embedding high insulation resistance; DC electronic extinguisher and D.C. contactor (2), load (3) is connected in parallel, when closing a floodgate, be after K connects, because of the ON time of electronic device far faster than pickup time of electromagnetic treadle, the insulated gate bipolar transistor IGBT of DC electronic extinguisher (1) will insert load (3) prior to D.C. contactor (2), after D.C. contactor (2) coil J connects, insulated gate bipolar transistor IGBT is ended by the contact short of adhesive, thereby finishes the automatic switchover of from the noncontacting switch to the D.C. contactor (2); When major loop is cut off the electricity supply, be after K disconnects, D.C. contactor (2) coil J dead electricity and disconnecting, insulated gate bipolar transistor IGBT in parallel is removed short circuit and is provided grid-control voltage and conducting rapidly by delay circuit (7), behind delay circuit (7) discharge off, insulation bipolar transistor IGBT row again ends.Because the intervention of insulated gate bipolar transistor IGBT, D.C. contactor (2) is in closure or disconnect the energy that moment will lose generation electric arc, so can eliminate arc light, realizes the purpose of arc extinguishing.In Fig. 3, the electric former reason control power circuit (6) of DC electronic extinguisher (1), delay circuit (7), high-frequency oscillating circuits (8), IBGT drive circuit (9), promotion circuit (10), optically coupled circuit (11), main loop circuit formations such as (5).Wherein, control power circuit (6) is by K switch, rectifier diode D ₁₀-D ₁₃Being linked to be full-bridge reaches by voltage stabilizing didoe D ₂, resistance R ₅, R ₆, resistance R ₇Constitute, it provides power supply to optically coupled circuit (11), D.C. contactor coil J; High-frequency oscillating circuits (8) is by integrated circuit block NE555 and resistance R ₁, resistance R ₂, capacitor C ₂, capacitor C ₃Constitute, it can produce 10KH ₂Signal, resistance R ₄, voltage stabilizing didoe D ₁Provide 6V stabilized voltage power supply to integrated circuit block NE555; Promote circuit (10) by transistor BG, capacitor C ₄, resistance R ₃Constitute, high-frequency oscillation signal is by capacitor C ₄, resistance 3, transistor drives and at high frequency transformer B ₁Secondary obtains the high frequency voltage of 20V, again through rectifier diode D ₆-D ₉Full-bridge obtains 16V voltage for the work of insulated gate bipolar transistor IGBT grid, and grid control signal transmits by optically coupled circuit (11), after K switch is connected, and light-emitting diode work, the insulated gate bipolar transistor IGBT grid obtains through resistance R ₁₂, resistance R ₁₆Control voltage and conducting because the ON time of insulated gate bipolar transistor IGBT is the microsecond level, far faster than the Millisecond of D.C. contactor coil J, so assurance electric arc can not produce.When cut-off switch K, D.C. contactor coil J dead electricity disconnects in advance, simultaneously the reason capacitor C ₈, resistance R ₈The delay circuit (7) that constitutes provides discharge voltage to optically coupled circuit (11), makes insulated gate bipolar transistor conducting once more, avoids electric arc to produce.Y1, Y2 are piezo-resistance, are connected in parallel on the insulated gate bipolar transistor IGBT output and play a protective role.

Claims (3)

1, a kind of DC electronic extinguisher, by housing (4), major loop binding post (12,13) control power circuit binding post (14,15), load wiring terminal (16,17), control power circuit (6), delay circuit (7), high-frequency oscillating circuits (8), IGBT drive circuit (9), promote circuit (10), optically coupled circuit (11), main loop circuit formations such as (5), be cuboid, it is characterized in that: whole electronic devices and components of DC electronic extinguisher (1) are contained in the housing (4), the outer major loop binding post (12 that is equipped with of housing (4), 13), control power circuit binding post (14,15) and load wiring terminal (16,17); D.C. contactor binding post (18,19) is connected in parallel with load wiring terminal (16,17); Major loop binding post in housing (4) (12,13) connects insulated gate bipolar transistor IGBT, and control power circuit binding post (14,15) meets rectifier diode D ₁₀-D ₁₃Full bridge rectifier, load wiring terminal (16,17) and insulated gate bipolar transistor IGBT and piezo-resistance Y ₁, Y ₂Be connected,

DC electronic extinguisher (1) is by control power circuit (6), delay circuit (7), IGBT drive circuit (9), high-frequency oscillating circuits (8), promotion circuit (10), optically coupled circuit (11), main loop circuit formations such as (5); Wherein, control power circuit (6) is by K switch, rectifier diode D ₁₂-D ₁₃Being linked to be full bridge rectifier reaches by voltage stabilizing didoe D ₂, resistance R ₅, resistance R ₆, resistance R ₇Constitute, be connected with D.C. contactor (2) coil with other all circuit; High-frequency oscillating circuits (8) is by integrated circuit block NE555, resistance R ₁, resistance R ₂, capacitor C ₂, capacitor C ₃Constitute, be connected with promotion circuit (10); Promote circuit (10) by semiconductor triode BG, capacitor C ₄, resistance R ₃Constitute, be connected with IGBT drive circuit (9); IGBT drive circuit (9) is by high frequency transformer B1, rectifier diode D ₆-D ₉Full bridge rectifier constitutes, and is connected with main loop circuit (5); Optically coupled circuit (11) is a two-way, a route optical coupler 1/2AQW216, diode D ₃, voltage stabilizing didoe D ₄, resistance R ₁₅Constitute another route optical coupler 1/2AQW216, voltage stabilizing didoe D ₅, resistance R ₁₀, resistance R ₁₃, capacitor C ₅Constitute, be connected with main loop circuit (5); Main loop circuit (5) is by two insulated gate bipolar transistor IGBTs, resistance R ₁₆, resistance R ₁₂, piezo-resistance Y ₁, piezo-resistance Y ₂Constitute, with major loop binding post (12,13), load wiring terminal (16,17) D.C. contactor binding post (18,19) is connected.

2, DC electronic extinguisher according to claim 1 is characterized in that: the inner silicone rubber seal of filling the embedding high insulation resistance of housing (4).

3, DC electronic extinguisher according to claim 1 is characterized in that: DC electronic extinguisher (1) is connected in parallel with D.C. contactor (2), load (3).

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