CN2494053Y

CN2494053Y - Power source socket capable of filtering pulse stray wave interference

Info

Publication number: CN2494053Y
Application number: CN 01243028
Authority: CN
Inventors: 刘振兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-08-08
Filing date: 2001-08-08
Publication date: 2002-05-29
Anticipated expiration: 2011-08-08

Abstract

The utility model is a power socket for filtering the disturbance of pulsed clutter, comprising a power socket, a trilinear power cable, an anti-interference filter with a grounding metal shielding box, a power socket and a shell of the power socket, the utility model has the connection relation that the plug is connected with the anti-interference filter arranged in the shell through a power input wire, the anti-interference filter is connected with the power socket arranged on the shell through a power output wire, the circuit of the anti-interference filter comprises a cuspate and narrow pulse short-circuit circuit I, II and LG style Pi type high-frequency clutter filtering circuit, the I, II and the pulsed clutter electromagnetic field canceling circuits are connected with each other through the respective power supply and signal line. The utility model is characterized in that the anti-interference isolation of an electrical equipment from the power supply network can be implemented, the impulsive interference clutter can be effectively filtered, the electrical equipment can be reliably and stably worked. Therefore, the utility model has the advantages of reliable usage, safety and convenience.

Description

The supply socket that a kind of energy filtering impulsive noise signal disturbs

The utility model is the supply socket that a kind of energy filtering impulsive noise signal disturbs, and belongs to the general electronic corporation instrument.

In the epoch at our present place, the phenomenon of being discord between power supply and the electrical appliance is more and more serious.On the one hand increasing product is more and more higher to " purity " requirement of institute's use power supply as electric equipments such as computer, TV, radio receiver, medical electronics utensil, electronic instrument, anti-thefting monitoring warning devices; Power supply of today but then is subjected to again disturbing as the strong impulsive noise signal that electric equipment produced such as lightning thunderstorm, low-and high-frequency radio wave and fluorescent lamp inferior, electricity-saving lamp inferior, electric welding machine, electric brush motor, hair dryer more and more, not only seriously influence and disturbing the normal operation of other electric equipments, even can cause deadlock or serious quite serious problems such as misoperation.And these strong interference noises can influence the stable use of more electric equipment again by the pollution that the power supply input circuit makes whole power supply power supply network be subjected to these interference noises.These problems though also obtained the attention of some producers, have just been taked the quarantine measures of some anti-High-frequency Interference at the input of power supply in the circuit design of some electronic products such as Switching Power Supply in recent years; Also there is the design of some producers to produce the power filtering module of the modular of some band iron-clads shieldings, couples together application for electricity consumer oneself and institute's electrical appliance.One of shortcoming of the filter product of this modular just is to use trouble, promptly must carry out connecting line earlier; The 2nd, can bring the hidden danger of secure context, because being conduction screw and the metal that exposes, the connected mode of modular closes the screen shell; The 3rd, also to consider its placement location and fixing and installation question.

The purpose of this utility model be exactly for overcome and solve existing some electric equipment exist produce strong impulse disturbances clutter can make whole supply network power supply contaminated and influence more electric equipment can not be reliable, stably use, and the shielding quarantine measures and the filter product of existing anti-High-frequency Interference use trouble, has hidden danger, the shortcoming and the problem of use inconvenience etc., research and design is a kind of will to have good resistance to disturb isolation effect, the effectively interference noise of filtering power supply grid between electric equipment and the electric power network, the assurance electric equipment conceals decides reliably working, the supply socket that energy filtering impulsive noise signal safe and convenient to use disturbs.

The utility model is realized by following technical proposals: a kind of can filtering the supply socket disturbed of impulsive noise signal the appearance structure schematic diagram as shown in Figure 1, its circuit block diagram as shown in Figure 2, its circuit theory diagrams are as shown in Figure 3.It is by containing earth connection at interior three-way attaching plug 1, three-way power supply input cable soft wire 2, anti-interference filter with grounded metallic shield box, three-way supply socket 3, supply socket shell 4 connects and composes jointly, its interconnected relationship is: contain earth connection and be electrically connected mutually with the anti-interference filter that the grounded metallic shield box is arranged in being loaded on supply socket shell 4 by three-way feed cable flexible cord 2 at interior three-way attaching plug 1, the anti-interference filter that the grounded metallic shield box is arranged that is loaded in the supply socket shell 4 is electrically connected mutually by the three-way supply socket 3 top with being loaded on plastic casing 4 of its three power supply output lines; The circuit of its anti-interference filter is electrically connected jointly and is constituted by sharp burst pulse short circuit current I, II, LC formula π type high frequency clutter filter circuit I, II, impulsive noise signal electromagnetic field cancellation circuit, and its interconnected relationship is: sharp burst pulse short circuit current I is electrically connected with three-way attaching plug 1, LC formula π type high frequency clutter filter circuit I respectively mutually by power input line, power line; Impulsive noise signal electromagnetic field cancellation circuit offsets output line by high frequency clutter filtering signal output line, impulsive noise signal electromagnetic field respectively and is electrically connected mutually with LC formula π type high frequency clutter filter circuit I, LC formula π type high frequency clutter filter circuit II respectively; Point burst pulse short circuit current II is electrically connected with LC formula π type high frequency clutter filter circuit II, three-way supply socket 3 respectively mutually by high frequency clutter filtering signal line, power supply output line respectively; Wherein: sharp burst pulse short circuit current I is made of filter capacitor C1; LC formula π type high frequency clutter filter circuit I is by high frequency choke coil L ₁, L ₂, filter capacitor C ₂～C ₅Be electrically connected formation jointly; Impulsive noise signal electromagnetic field cancellation circuit is made of homophase high frequency transformer T; LC formula π type high frequency clutter filter circuit II is by high frequency choke coil L ₃, L ₄, filter capacitor C ₆～C ₉Be electrically connected formation jointly; Point burst pulse short circuit current II is by filter capacitor C ₁₀Constitute.

Operation principle of the present utility model is: the mains ac power supply is after plug is incorporated into binding post A, B, C.It sneaks into sharp burst pulse in the power supply at first by capacitor C ₁Institute's short circuit, but because mains frequency is lower, be 50 weeks only, C added ₁Value is less, so C ₁Only High-frequency Interference pulse generation short circuit is strobed, influenced hardly to electric main; If C ₁To some High-frequency Interference pulse, for example the common mode interference signal filtering is good inadequately, so, and by C ₂L ₁C ₄And C ₃L ₂C ₅The filter of forming carries out filtering to the interference noise signal simultaneously; Eliminate mutually through the electromagnetic field that carries out disturbing pulse with phase transformer T simultaneously again then; Thereby to greatest extent with the disturbing pulse filtering; The impulse disturbances clutter that is produced by electrical appliance equipment is then by capacitor C among Fig. 3 ₁₀, and C ₆L ₃C ₈, C ₇L ₄C ₆With carry out filtering with phase transformer T principle same as described above.

The utility model is compared with prior art equipment, have following advantage and beneficial effect: (1) the utility model can will carry out anti-interference isolation well between electric equipment and the power supply grid, can make the impulse disturbances clutter of originally sneaking into power supply grid obtain effective filtering, make it not influence the reliable and stable work of electrical appliance equipment, and can also make other that insert power utilization network may produce the electric equipment of various interference noise pulses, also can and isolate out interference noise, and unlikely the power supply network be caused new pollution by filtering; (2) the utility model can make electricity consumption electric equipment plug and play and need not carry out line again; Use very safe and convenient; (3) the utility model manufacturing simple in structure, easy, cost is low, performance/sound of laughing ratio is high.

Execution mode of the present utility model can be as follows: (1) presses protracting circuit plate shown in Fig. 2～3, screens components and parts then connection is installed; As capacitor C ₁～C ₁₀All optional 0.1 μ/400v; L ₁～L ₄Can select 100 μ H for use; Electromagnetic field bucking transformer T can select Φ 18 * 8 * 5 magnetic core two-wires of MX02000 type for use and make around about 40 circles; (2) can select for use sheet metal to adopt process for stamping to make the anti-interference filter shielding box, the above-mentioned anti-interference filter circuit board of debuging is packed in the metallic shield box, and adding that shielding box cover shields fully after drawing input, output line from the box both sides, metallic shield box external welding ground wire is connected with attaching plug, socket ground terminal; (3) the good anti-interference filter that contains the grounded metallic shield box of above-mentioned manufacturing is loaded in the supply socket shell 4, supply socket shell 4 is optional to adopt injection moulding process to make with engineering plastics, and the general three-way supply socket of installation on shell, three output lines of anti-interference filter are connected with three-way supply socket, three incoming lines of anti-interference filter are connected with attaching plug, just can implement the utility model preferably.The inventor through research, the test of long period, debug the supply socket that experimental manufacturing cost can filtering impulse disturbances clutter, be used for household electrical appliance such as television set, Blowing drum, DVD player, home theater, effect is fine, fully the interference effect of the various impulsive noise signals of energy filtering.

Claims

1, the supply socket that a kind of energy filtering impulsive noise signal disturbs, it is characterized in that: it is by containing earth connection at interior three-way attaching plug (1), three-way power supply input cable soft wire (2), anti-interference filter with grounded metallic shield box, three-way supply socket (3), supply socket shell (4) connects and composes jointly, its interconnected relationship is: contain earth connection and be electrically connected mutually with the anti-interference filter that the grounded metallic shield box is arranged in being loaded on supply socket shell (4) by three-way feed cable flexible cord (2) at interior three-way attaching plug (1), the anti-interference filter that the grounded metallic shield box is arranged that is loaded in the supply socket shell (4) is electrically connected mutually by its three power supply output lines three-phase power socket (3) top with being loaded on plastic casing (4); The circuit of its anti-interference filter is electrically connected jointly and is constituted by sharp burst pulse short circuit current I, II, LC formula π type high frequency clutter filter circuit I, II, impulsive noise signal electromagnetic field cancellation circuit, and its interconnected relationship is: sharp burst pulse short circuit current I is electrically connected with three-way attaching plug (1), LC formula π type high frequency clutter filter circuit I respectively mutually by power input line, power line; Impulsive noise signal electromagnetic field cancellation circuit offsets output line by high frequency clutter filtering signal output line, impulsive noise signal electromagnetic field respectively and is electrically connected mutually with LC formula π type high frequency clutter filter circuit I, LC formula π type high frequency clutter filter circuit II respectively; Point burst pulse short circuit current II is electrically connected with LC formula π type high frequency clutter filter circuit II, three-way supply socket (3) respectively mutually by high frequency clutter filtering signal line, power supply output line respectively;