CN2472352Y

CN2472352Y - Distributive cascade LC integrated filter

Info

Publication number: CN2472352Y
Application number: CN 01207724
Authority: CN
Inventors: 尤大千
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-22
Filing date: 2001-03-22
Publication date: 2002-01-16
Anticipated expiration: 2011-03-22

Abstract

The utility model relates to a distributed cascade L-C integrated filter inductive coil and capacitor, comprising an electric insulation barrel-type framework, two conductive foils which are adhered and winded at the barrel-type framework, and an electric insulation layer which is arranged between the two conductive foils. The two foils are formed into two independent inductive coils, and the capacitor is formed between the two inductive coils, thereby the inductive coil and the capacity are combined as a whole. The utility model has the advantages that: the structure is compact, the integrity is strong, and a distributed cascade filter having broadband harmonic resonance frequency is formed, thereby the utility model can remove various clutters effectively.

Description

The integrated filter of distributed cascade L-C

The utility model relates to a kind of AC and DC circuit filter.

Existing L-C filter no matter is that alternating current circuit is used or DC circuit is used, and its solenoid and capacitor all are separately independently.By separately independently the filter made of solenoid and capacitor can only have a single resonance frequency when unusual resonance takes place for the voltage of circuit or electric current, can cause that entire circuit produces overvoltage or overcurrent brings harmful effect for the normal operation and the work of power consumption equipment or device, even power consumption equipment or device are damaged; If the capacitor that uses during as the thoughts capacitor High-frequency Interference ripple by the time make high wave interference ripple cross the operate as normal that filter disturbs power consumption equipment or device because of the plug flow effect of capacitor can not be absorbed.For fear of the generation of above-mentioned phenomenon, common solution is that the capacitor that the multistage filter is set or adopts a plurality of amount of capacity not wait carries out classification and suppresses all kinds of clutters.Because at different levels sections filtering are discontinuous, therefore still can not thoroughly eliminate the generation of above-mentioned phenomenon, increased the manufacturing cost of filter simultaneously again widely.

The purpose of this utility model provides a kind of DC circuit and alternating current circuit of can be used for, and has broadband resonance effective all kinds of interference noises of filtering frequently, distributed cascade L-C filter that inductance coil and capacitor are integrated.

To be the inductance coil of L-C filter of being made of inductance coil, capacitor and capacitor by electric insulation drum shape frame, two paste distributed cascade L-C filter foldedly is wound on the conductive metal foil on the drum shape frame and places the electric insulation layer between two conductive metal foils to constitute, two conductive metal foils are wound on and constitute two inductance coils on the drum shape frame, constitute capacitor between two circle metal foil coil, thereby make inductance coil, capacitor form integral structure.There is binding post at the two ends of two inductance coils.

In order to adapt to and to satisfy different instructions for uses, further improving of the integrated filter of distributed cascade L-C is that any ring layer of incorporate two conductive metal foils of L-C has the lead-out wire that electrically connects with this ring layer.

According to filter use and make requirement, the electric insulation layer between two conductive metal foils can adopt electrically-insulating paper, electric insulation resin film production, or at metal foil surface spraying insullac.

The inductance coil and the capacitor of the integrated filter of distributed L-C that the utility model provides are become one, compact conformation, globality are strong, electric contact is few and constitute the filter with broadband resonance frequency of distributed multi-cascade, all kinds of interference noises of filtering effectively, and making electrical network be difficult for resonance phenomena takes place, its use is safer, reliable.

Accompanying drawing is embodiment of the present utility model, but the utility model is not limited only to embodiment, further specifies the utility model below in conjunction with embodiment.

Fig. 1 is the integrated loop construction schematic diagram of inductance-electric capacity of the integrated filter of distributed cascade L-C.(amplification)

Fig. 2 is the integrated coil equivalent circuit diagram of inductance-electric capacity shown in Figure 1.

Fig. 3 is the integrated filter construction schematic diagram of distributed cascade L-C that is used for DC circuit and single phase alternating current circuit.

Fig. 4 is the integrated filter construction schematic diagram of distributed cascade L-C that is used for three-phase circuit.

Fig. 5 is the integrated filter circuit winding diagram of distributed cascade L-C shown in Figure 4.

As shown in Figure 1, integrated filter inductor of distributed cascade L-C and capacitor are adopted by electric insulation drum shape frame (1), two and are pasted folded electric insulation layer (2) formation that is wound on tinsel band (3), (4) on the skeleton and places two tinsel interbands, and two tinsel tape wrappings constitute two independently inductance coils.Constitute capacitor between two circle metal foil coil, there is binding post U at the two ends of two inductance coils ₁, U ₂, V ₁, V ₂, the equivalent circuit of coil constitutes 1L as shown in Figure 2 when the metal forming coiling number of turn is the n circle ₁-C ₁-2L ₁, 1L ₂-C ₂-2L ₂1L _n-C _n-2L _nThe distributed filter that is constituted.

DC circuit and single phase alternating current circuit are sleeved on coil shown in Figure 1 (6) on the electromagnetic core (5) binding post U with the integrated filter of distributed cascade L-C as shown in Figure 3 ₁, U ₂Be serially connected on the phase line of the positive pole of DC circuit or alternating current circuit V ₁, V ₂Be serially connected on the zero line of the negative pole of DC circuit or alternating current circuit.

Three-phase circuit with the integrated filter of distributed cascade L-C as shown in Figure 4, electromagnetic core (7), the metal foil coil of structure (8), (9), (10) constitute as shown in Figure 1 to be sleeved in the electromagnetic core conversion three, three coil equivalent circuits and wiring as shown in Figure 5, six integrated metal foil coil of inductance-electric capacity are respectively F _A1And F _A2, F _B1And F _B2, F _C1And F _C2With F _A1Tail end U _A2With F _B2Head end V _B1Connect F _A2Head end V _A1With F _C1Tail end U _C2Connect F _B1Tail end U _B2With F _C2Head end V _C1Connect, with terminals L ₁, L ₂, L ₃Be serially connected in respectively on three phase lines of alternating current circuit.

Except that embodiment, the integrated filter of distributed cascade L-C can be made into the resonance frequency adjustable filter as required.Its method can be drawn the wiring iron core by common way and be adopted the magnetic insulation material on the different ring layers of integrated coil, regulate the adjusting that changes inductance value realization resonance frequency by changing coil turn; Also can change resonance frequency by changing electromagnetic core space change magnetic resistance and then adjusting, change electromagnetic core magnetic flux adjusting change inductance value and then regulating, moreover be exactly dress and add impedance coil and change the inductance of coil, thereby realize the adjustability of the resonance frequency of filter by the size that changes resistance value.In addition, when requiring linear inductance, can be made into the filter of the integrated mounting coil of L-C on magnetic insulation material skeleton.

Claims

1, the integrated filter of a kind of distributed cascade L-C, include inductance coil, capacitor, it is characterized in that said inductance coil and capacitor are pasted by electric insulation drum shape frame, two foldedly is wound on the conductive metal foil on the drum shape frame and places the electric insulation layer between two conductive metal foils to constitute, and there is binding post at the two ends of two coils that two metal formings constitute.

2, by the integrated filter of the described distributed cascade L-C of claim 1, it is characterized in that the said any figure layer that is wound on two conductive metal foils on the electric insulation drum shape frame has the lead-out wire that electrically connects with this ring layer.