Nano crystalline core for common mode choke

Nano crystalline Cores for common mode chokes

Available

Description
Reviews

Working Principal

Nano Core in Plastic Casing & copper wound nano core

The filter circuit of Common Mode Inductance: La and Lb are common mode inductance coils. The two coils are wound around the same core, with the same number of turns and phases (the winding is reversed). When the normal current flows through the common-mode inductance, the current in the same phase winding inductance coil generates reversed magnetic fields, and then the reversed magnetic fields cancel each other out. At the moment, the normal signal current is mainly affected by the coil resistance (and a small amount of damping caused by leakage); When the common-mode current flows through the coil, as a result of the same direction of common-mode current, there will produce same direction magnetic field in the coil and increase the coil impedance, which will make coil performance for high impedance and produce stronger damping effect, by this to damp common-mode current and achieve the goal of filtering. In fact, the filter circuit is connected to the interference source at one end, the other end is connected to the interference device, then La and C1, Lb and C2 constitute two sets of low-pass filters; Then the common mode EMI signal will be controlled at a very low level. The circuit not only can control the incoming of EMI signal, but also can attenuate the EMI signal generated by the line itself, which can effectively reduce the EMI interference strength. Now a small domestic common mode inductors, with the use of high-frequency noise suppression measures, common mode choke coil structure, its signal will not damp. Such small common mode inductor is also with the advantages of small size, easy of use, good balance, high quality and so on. It is widely used in double balanced tuning devices, multi-frequency transformers, impedance transformers, balanced and unbalanced transformers etc.　

Features

High initial permeability and high AL value
High effective insertion loss and excellent noise suppression
Wide frequency range, large adjustable range for permeability （µ0）from 20000～160000
Low core loss，small choke size for volume and weight with epoxy coating

Application

Switched-mode Power supplies
Common Mode noise suppression
Precision equipment protection
Power grid EMI harmonic filtering
Other EMC application areas
EMI common mode filter
Single-phase or three-phase power lines

Properties
	Nanocrystalline cores	Ferrite cores
Saturation magnetic induction Bs（T)	≥1.20T	0.4
Curie temperature（℃)	≥560	170
Saturation magnetism flexible coefficient（×10-6)	2	4
Operating Temperature Range	-55—130℃	80℃
Initial permeability　µ0	20000－160000	2000
Coercivity A/m	1.6	30
High frequency core lose P(20KHZ.0.2T)	3.4	7.5

Specifications and electric parameters
Part No.	Core dimensions(mm) OD×ID×H	Finished dimensions(mm)			lFe (cm)	AFe (cm2)	AL※		Type of finish
Part No.	Core dimensions(mm) OD×ID×H	OD	ID	Ht	lFe (cm)	AFe (cm2)	10K nominal	100K nominal	Type of finish
1	7.2×4.5×3.0	8.0	3.5	4.5	1.81	0.03	12	--	Plastic case
2	9.8×6.5×4.5	11.2	5.1	5.7	2.56	0.06	22	5	Plastic case
3	10×6.5×5.0	11.2	5.1	6.5	2.59	0.07	24	--	Plastic case
4	12×8.0×4.5	13.5	6.5	6.5	3.14	0.07	25	--	Plastic case
5	14×10×5.0	15.5	8.5	6.8	3.77	0.08	21	--	Plastic case
6	16×10×8	17.2	8.5	10	4.08	0.19	40	--	Plastic case
7	20×12×8	22.3	10	10.3	5.03	0.25	45	--	Plastic case
8	20×12×8	22.3	22.3	10.3	5.03	0.25	20	9	Plastic case
9	16×12.5×6	≤17.8	≥10.7	≤8.0	4.48	0.08	16	5.3	Epoxy coated
10	26×16×10	27.5	14.0	12.5	6.60	0.39	65	15	Plastic case
11	21×16.5×12	22.8	14.6	15	5.89	0.21	--	7.5	Plastic case
12	28×18×15	30.2	16.0	17.6	7.23	0.59	60	--	Plastic case
13	25×20×10	27.8	18	12.7	7.07	0.20	30	7	Plastic case
14	30×20×15	33.1	17.8	17.5	7.85	0.59	70	--	Plastic case
15	32×20×10	34	17.8	12.5	8.17	0.47	45	--	Plastic case
16	40×25×10	42.5	22.5	13.0	10.21	0.59	50	--	Plastic case
17	40×25×15	43.2	21.9	18.9	10.21	0.88	70	--	Plastic case
18	40×32×15	44.3	29.2	18.6	11.31	0.47	45	7
19	40×32×15	≤43.5	≥28.5	≤17.8	11.31	0.47	14	7.2	Epoxy coated
20	50×32×15	53.2	29.0	18.2	12.88	1.05	60	--	Plastic case
21	50×32×20	53.2	29.5	23.5	12.88	1.40	80	--	Plastic case
22	50×40×20	≤53.5	≥36.5	≤22.8	14.14	0.78	30	10	Epoxy coated
23	50×40×25	53.4	36.2	28.3	14.14	0.98	62	12	Plastic case
24	60×40×20	63	37	24	15.71	1.56	70	--	Plastic case
25	64×40×20	67	37	24	16.34	1.87	80	--	Plastic case
26	65×50×25	68	47	29	18.06	1.46	60	18	Plastic case
27	80×50×20	84	47	24	20.42	2.34	80	--	Plastic case
28	100×80×20	76	103.6	23.7	28.27	1.56	45	13	Plastic case