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Do You Know The Function And Working Principle Of Patch Inductor?

2022-05-18

Patch inductance and current convert electrical energy, store it, and then release it, which is why capacitors discharge. Resistance consumes electrical energy and converts it into heat energy, which cannot be released again. Capacitors convert electrical energy into potential energy, and patch inductors convert electrical energy into magnetic energy. Potential energy can discharge electricity, and magnetic energy can generate electricity, while heat energy cannot be converted back through resistance. So the resistance is consuming energy. Both inductance and capacitance act as obstacles to current. Inductance is used to maintain current, and inductance is used to direct current to prevent AC, because it is meaningless for direct current to pass through the inductance, because the magnetic field does not change. The capacitor is to maintain the voltage, is the current through the alternating current, because the capacitor in the DC circuit is equivalent to open, capacitor is to maintain the voltage.


When the inductor is energized, the self-induced electromotive force u=dψ/dt=L? Di /dt. According to Lenz's law: when I increases, the direction of the induced current is opposite to that of I. When the inductance coil is just energized, the current changes rapidly and the induced current is very large, which is superimposed with the original current, so that the current in the coil can only increase from 0 until the current changes to 0, and then the current in the coil can reach the maximum. So, the inductor coil has a delay effect. The inductor can realize the filtering function by using its on-direct-resistance-to-traffic characteristics. And can be combined with the capacitor into a different filter circuit. Figuratively speaking, Filtering is the blocking of alternating current signals like waves; Therefore, The ac component is the object of filtering; And filtering ac components; Pure dc component can be obtained;  Patch inductor at the power supply end; After rectifying the circuit, the filter function is generally realized.


Patch inductance principle introduction:

Inductance is a property of a closed circuit, that is, when the current through the closed circuit changes, there will be an electromotive force to resist the current change. This inductance, called self-induction, is a property of the closed loop itself. If a change in current in one closed circuit causes an electromotive force to be induced in another closed circuit, the inductance is called mutual inductance. When two inductance coils are close to each other, the magnetic field change of one inductance coil will affect the other inductance coil, and this effect is mutual inductance. The mutual inductance depends on the degree of coupling between the self-inductance of the inductance coil and the two inductance coils. The element made by this principle is called transformer.


Function of patch inductance:

Patch inductor is an electromagnetic induction element wound with insulated wire. It is a common inductance element. The role of the patch inductor: through DC resistance AC this is a simple way of saying that the AC signal is isolated, filtered or resonated with capacitors, resistors, etc. The role of tuning and frequency selection inductor: the LC tuning circuit can be composed of inductive coil and capacitor in parallel. Any current in the patch inductor in the circuit generates a magnetic field, the flux of which acts on the circuit.


As the current through the patch inductor changes, the DC voltage potential generated in the patch inductor will prevent the current from changing. When the current passing through the inductance coil increases, the inductance coil generates the self-induced electromotive force and electricity. When the current passing through the inductance coil decreases, the self-induced electromotive force is in the same direction as the current, preventing the current from decreasing and releasing stored energy to compensate for the decrease in current. The current direction is opposite to prevent the increase of current, while part of the electric energy into a magnetic field can be stored in the inductor; Therefore, after the inductance filtering, not only the load current and voltage pulsation is reduced, the waveform becomes smooth, and the rectifier diode conduction angle increases.


SMD inductor with general SMD inductance shielding, general SMT inductance in the circuit is without blocking, use up in the circuit inductance is less than the desired effect, shielding SMT inductance can block out some of the current in the circuit is not stability, good have the effect of blocking, shielding inductive complete metal shield will positively charged conductor surrounded by On the inside of the shield body, the negative charge equal to that of the charged conductor will be induced, and the positive charge equal to that of the charged conductor will appear on the outside. If the metal shield body is grounded, the positive charge on the outside will flow into the earth, and there will be no electric field on the outside, that is, the electric field of the positive conductor will be shielded in the metal shield body.


The shielding inductance also plays a coupling role in the circuit. In order to reduce the coupling interference voltage of the sensitive circuit caused by alternating electric field, the shielding metal body with good conductivity can be set between the interference source and the sensitive circuit, and the metal shielding body can be grounded. The coupling interference voltage of alternating electric field to sensitive circuit depends on the product of alternating electric field voltage coupling capacitance and grounding resistance of metal shield. As long as the metal shield is well grounded, the coupling interference voltage of the alternating electric field to the sensitive circuit can be minimized. The electric field shielding is mainly reflected, so the thickness of the shielding body need not be too large, and the structural strength is the main factor to consider.




                                                         CD31 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

(KHz).

(Ω) MAX.

A  MAX

CD31-2R2M

2.2

100KHZ

0.24

1.20

CD31-3R3M

3.3

100KHZ

0.27

1.08

CD31-4R7M

4.7

100KHZ

0.30

1.00

CD31-6R8M

6.8

100KHZ

0.47

0.80

CD31-8R2M

8.2

100KHZ

0.52

0.76

CD31-100M

10.0

100KHZ

0.55

0.70

CD31-120M

12.0

100KHZ

0.75

0.60

CD31-150M

15.0

100KHZ

0.91

0.50

CD31-220M

22.0

100KHZ

1.20

0.40

CD31-270M

27.0

100KHZ

1.50

0.36 



                                                         CD32 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

(KHz).

(Ω) MAX.

A  MAX

CD32-100K

10

100

0.23

0.760

CD32-120K

12

100

0.27

0.685

CD32-150K

15

100

0.31

0.635

CD32-180K

18

100

0.41

0.525

CD32-220K

22

100

0.47

0.500

CD32-270K

27

100

0.66

0.405

CD32-330K

33

100

0.76

0.380

CD32-390K

39

100

0.85

0.355

CD32-470K

47

100

0.97

0.330

CD32-560K

56

100

1.25

0.290

CD32-680K

68

100

1.45

0.275

CD32-820K

82

100

1.85

0.235

CD32-101K

100

100

2.20

0.220

CD32-121K

120

100

2.90

0.185

CD32-151K

150

100

3.40

0.170

CD32-181K

180

100

3.90

0.165

CD32-221K

220

100

4.50

0.155

CD32-271K

270

100

6.00

0.135

CD32-331K

330

100

7.00

0.125

CD32-391K

390

100

7.80

0.115 



                                                        CD43 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

( MHz ).

(Ω) MAX.

A   MAX

CD43-1R0M

1.0

7.96

0.0487

2.560

CD43-1R4M

1.4

7.96

0.0562

2.520

CD43-1R8M

1.8

7.96

0.0637

1.950

CD43-2R2M

2.2

7.96

0.0712

1.750

CD43-2R7M

2.7

7.96

0.0787

1.580

CD43-3R3K

3.3

7.96

0.0862

1.440

CD43-3R9K

3.9

7.96

0.0937

1.330

CD43-4R7K

4.7

7.96

0.1087

1.150

CD43-5R6K

5.6

7.96

0.1257

0.990

CD43-6R8K

6.8

7.96

0.1312

0.950

CD43-8R2K

8.2

7.96

0.1462

0.840

CD43-100K

10

2.52

0.1820

1.040

CD43-120K

12

2.52

0.2100

0.970

CD43-150K

15

2.52

0.2350

0.850

CD43-180K

18

2.52

0.3380

0.740

CD43-220K

22

2.52

0.3780

0.680

CD43-270K

27

2.52

0.5220

0.620

CD43-330K

33

2.52

0.5400

0.560

CD43-390K

39

2.52

0.5870

0.520

CD43-470K

47

2.52

0.8440

0.440

CD43-560K

56

2.52

0.9370

0.420

CD43-680K

68

2.52

1.1170

0.370 



                                                         CD52 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

( MHz ).

(Ω) MAX.

A   MAX

CD52-2R2M

2.2

7.96

0.039

2.16

CD52-2R7M

2.7

7.96

0.044

2.08

CD52-3R3K

3.3

7.96

0.049

1.90

CD52-3R9K

3.9

7.96

0.056

1.84

CD52-4R7K

4.7

7.96

0.062

1.60

CD52-5R6K

5.6

7.96

0.078

1.44

CD52-6R8K

6.8

7.96

0.091

1.36

CD52-8R2K

8.2

7.96

0.103

1.12

CD52-100K

10

2.52

0.133

1.04

CD52-120K

12

2.52

0.148

0.96

CD52-150K

15

2.52

0.166

0.88

CD52-180K

18

2.52

0.213

0.77

CD52-220K

22

2.52

0.248

0.73

CD52-270K

27

2.52

0.328

0.64

CD52-330K

33

2.52

0.378

0.58

CD52-390K

39

2.52

0.438

0.54

CD52-470K

47

2.52

0.546

0.49

CD52-560K

56

2.52

0.621

0.45

CD52-680K

68

2.52

0.715

0.41

CD52-820K

82

2.52

1.000

0.35

CD52-101K

100

1KHZ

1.070

0.35

CD52-121K

120

1KHZ

1.250

0.32

CD52-151K

150

1KHZ

1.660

0.26

CD52-181K

180

1KHZ

1.900

0.23

CD52-221K

220

1KHZ

2.440

0.21

CD52-271K

270

1KHZ

2.730

0.19 



                                                         CD53 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

( MHz ).

(Ω) MAX.

A   MAX

CD53-2R2M

2.2

7.96

0.03

3.50

CD53-2R7M

2.7

7.96

0.04

3.20

CD53-3R3K

3.3

7.96

0.05

2.80

CD53-3R9K

3.9

7.96

0.06

2.60

CD53-4R7K

4.7

7.96

0.07

2.50

CD53-5R6K

5.6

7.96

0.08

2.40

CD53-6R8K

6.8

7.96

0.09

2.20

CD53-8R2K

8.2

7.96

0.10

2.00

CD53-100K

10

2.52

0.12

1.80

CD53-120K

12

2.52

0.13

1.75

CD53-150K

15

2.52

0.15

1.70

CD53-180K

18

2.52

0.18

1.60

CD53-220K

22

2.52

0.22

1.50

CD53-270K

27

2.52

0.24

1.40

CD53-330K

33

2.52

0.30

1.10

CD53-390K

39

2.52

0.40

1.00

CD53-470K

47

2.52

0.43

0.90

CD53-560K

56

2.52

0.50

0.85

CD53-680K

68

2.52

0.60

0.80

CD53-820K

82

2.52

0.80

0.65

CD53-101K

100

1KHZ

0.90

0.60

CD53-121K

120

1KHZ

1.00

0.58

CD53-151K

150

1KHZ

1.30

0.43

CD53-181K

180

1KHZ

1.50

0.41

CD53-221K

220

1KHZ

2.00

0.38

CD53-271K

270

1KHZ

2.50

0.35

CD53-331K

330

1KHZ

3.20

0.28

CD53-391K

390

1KHZ

3.50

0.26

CD53-471K

470

1KHZ

4.20

0.20

CD53-561K

560

1KHZ

4.50

0.19

CD53-681K

680

1KHZ

6.00

0.18

CD53-821K

820

1KHZ

6.50

0.15

CD53-102K

1000

1KHZ

8.00

0.13 



                                                         CD54 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

(MHz).

(Ω) MAX.

A   MAX

CD54-100K

10

2.52

0.10

1.44

CD54-120K

12

2.52

0.12

1.40

CD54-150K

15

2.52

0.14

1.30

CD54-180K

18

2.52

0.15

1.23

CD54-220K

22

2.52

0.18

1.11

CD54-270K

27

2.52

0.20

0.97

CD54-330K

33

2.52

0.23

0.88

CD54-390K

39

2.52

0.32

0.80

CD54-470K

47

2.52

0.37

0.72

CD54-560K

56

2.52

0.42

0.68

CD54-680K

68

2.52

0.46

0.61

CD54-820K

82

2.52

0.60

0.58

CD54-101K

100

1KHZ

0.70

0.52

CD54-121K

120

1KHZ

0.93

0.48

CD54-151K

150

1KHZ

1.10

0.40

CD54-181K

180

1KHZ

1.39

0.38

CD54-221K

220

1KHZ

1.57

0.35 



                                                         CD73 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

(MHz).

(Ω) MAX.

A   MAX

CD73-100K

10

2.52

0.08

1.44

CD73-120K

12

2.52

0.09

1.39

CD73-150K

15

2.52

0.10

1.24

CD73-180K

18

2.52

0.11

1.12

CD73-220K

22

2.52

0.13

1.07

CD73-270K

27

2.52

0.15

0.94

CD73-330K

33

2.52

0.17

0.85

CD73-390K

39

2.52

0.22

0.74

CD73-470K

47

2.52

0.25

0.68

CD73-560K

56

2.52

0.28

0.64

CD73-680K

68

2.52

0.33

0.59

CD73-820K

82

2.52

0.41

0.54

CD73-101K

100

1KHZ

0.48

0.51

CD73-121K

120

1KHZ

0.54

0.49

CD73-151K

150

1KHZ

0.75

0.40

CD73-181K

180

1KHZ

1.02

0.36

CD73-221K

220

1KHZ

1.20

0.31

CD73-271K

270

1KHZ

1.31

0.29

CD73-331K

330

1KHZ

1.50

0.28 



                                                        CD75 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

(MHz).

(Ω) MAX.

A   MAX

CD75-100K

10

2.52

0.07

2.30

CD75-120K

12

2.52

0.08

2.00

CD75-150K

15

2.52

0.09

1.80

CD75-180K

18

2.52

0.10

1.60

CD75-220K

22

2.52

0.11

1.50

CD75-270K

27

2.52

0.12

1.30

CD75-330K

33

2.52

0.13

1.20

CD75-390K

39

2.52

0.16

1.10

CD75-470K

47

2.52

0.18

1.10

CD75-560K

56

2.52

0.24

0.94

CD75-680K

68

2.52

0.28

0.85

CD75-820K

82

2.52

0.37

0.78

CD75-101K

100

1KHZ

0.43

0.72

CD75-121K

120

1KHZ

0.47

0.66

CD75-151K

150

1KHZ

0.64

0.58

CD75-181K

180

1KHZ

0.71

0.51

CD75-221K

220

1KHZ

0.96

0.49

CD75-271K

270

1KHZ

1.11

0.42

CD75-331K

330

1KHZ

1.26

0.40

CD75-391K

390

1KHZ

1.77

0.36

CD75-471K

470

1KHZ

1.96

0.34 



                                                         CD104 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

(MHz).

(Ω) MAX.

A   MAX

CD104-100K

10

2.52

0.053

2.38

CD104-120K

12

2.52

0.061

2.38

CD104-150K

15

2.52

0.070

1.87

CD104-180K

18

2.52

0.081

1.73

CD104-220K

22

2.52

0.088

1.60

CD104-270K

27

2.52

0.100

1.44

CD104-330K

33

2.52

0.120

1.26

CD104-390K

39

2.52

0.151

1.20

CD104-470K

47

2.52

0.170

1.10

CD104-560K

56

2.52

0.199

1.01

CD104-680K

68

2.52

0.223

0.91

CD104-820K

82

2.52

0.252

0.85

CD104-101K

100

1KHZ

0.344

0.74

CD104-121K

120

1KHZ

0.396

0.69

CD104-151K

150

1KHZ

0.544

0.61

CD104-181K

180

1KHZ

0.621

0.56

CD104-221K

220

1KHZ

0.721

0.53

CD104-271K

270

1KHZ

0.950

0.45

CD104-331K

330

1KHZ

1.100

0.42

CD104-391K

390

1KHZ

1.245

0.38

CD104-471K

470

1KHZ

1.526

0.35

CD104-561K

560

1KHZ

1.904

0.32 



                                                         CD105 series of characteristics

The five rings number

L

TESTING

DC

RATED DC

FREQ.

RESISTANCE

CURRENT

uH  

(MHz).

(Ω) MAX.

A   MAX

CD105-100K

10

2.52

0.06

2.60

CD105-120K

12

2.52

0.07

2.45

CD105-150K

15

2.52

0.08

2.27

CD105-180K

18

2.52

0.09

2.15

CD105-220K

22

2.52

0.10

1.95

CD105-270K

27

2.52

0.11

1.76

CD105-330K

33

2.52

0.12

1.50

CD105-390K

39

2.52

0.14

1.37

CD105-470K

47

2.52

0.17

1.28

CD105-560K

56

2.52

0.19

1.17

CD105-680K

68

2.52

0.22

1.11

CD105-820K

82

2.52

0.25

1.00

CD105-101K

100

1KHZ

0.35

0.97

CD105-121K

120

1KHZ

0.40

0.89

CD105-151K

150

1KHZ

0.47

0.78

CD105-181K

180

1KHZ

0.63

0.72

CD105-221K

220

1KHZ

0.73

0.66

CD105-271K

270

1KHZ

0.97

0.57

CD105-331K

330

1KHZ

1.15

0.52

CD105-391K

390

1KHZ

1.30

0.48

CD105-471K

470

1KHZ

1.48

0.42

CD105-561K

560

1KHZ

1.90

0.33

CD105-681K

680

1KHZ

2.25

0.28

CD105-821K

820

1KHZ

2.55

0.24