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Inductors in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a Trainer

Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

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Page 1: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Inductors in Series and Parallel

Information found in Lesson 1420-1.

Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a Trainer

Page 2: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Things to Remember

• Inductors come in many forms. They can look similar to other components, such as a resistor, capacitor, transformer. (Inductors have two leads unless center tapped)

• Inductors do not have stated polarities.

Page 3: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

• Placement of the inductors closely together on the breadboard is not as important as maintaining a clean easy to follow circuit.

• Make sure the inductors are connected correctly. This may mean using jumper wires to make clean, easy to follow connections and test points / posts.

Page 4: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Inductors currently in use

Page 5: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

100mh Inductor, looks similar to a Capacitor

Page 6: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

470mh Inductor, looks similar to a Resistor

Page 7: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

470mh Inductor, looks similar to a tantalum Cap, except for the color dots

Page 8: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Experiment 1, Inductors connected in Series

Page 9: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Formula to Calculate Total Series Inductance

LT = L1 + L2 + L3 + … + Ln

Page 10: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Example using the schematic values C

100mH + 55mH + 100mH = 255mH

Page 11: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Fig 2 in 1420-1 to measure XL

Page 12: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Inductance also can be calculated with the following formula if you have the

value of XL.

2T CTfL X

Page 13: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Wiring Diagram, Two Inductors in Series to measure XL

Page 14: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Three Inductors in Parallel, Schematic

Page 15: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Reciprocal Formula

1 2 3

1

1 1 1 1...

T

n

L

L L L L

Page 16: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Example using the schematic values

1 126

1 1 1 38.18

100 100 55

m

m m m

Page 17: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

• You can also take the common values and divide by the amount of common inductors to get the total of the common parallel inductors. You would then have two values to work with, in this circuit, to calculate the total inductance.

Page 18: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Example:

• 100 x 10-3 /2 = 50 x 10-3

L1*L2 55 * 50 2.75m

L1 + L2 55 + 50 105m

26.190mh

Page 19: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Inductance also can be calculated with the following formula if you have the

value of XL.

2T CTfL X

Page 20: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

• In 1420-1, the author discusses mathematically how to prove ZT with XL and then L. Circuit in Fig 8 works to measure XL to determine LT.

• He wanted to prove mathematically the circuit to measure XL to determine LT works.

Page 21: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

• This circuit would not be used by technicians in real life. Technicians would not calculate LT using the method described in the Introduction for Experiment 2.

• The circuits are there to get you used to working with the components and to learn their characteristics.

Page 22: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Fig 8 in 1420-1 Two Inductors in Parallel, to measure XL and verifying LT

Page 23: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Circuit to measure LT, Fig 10 in 1420

Page 24: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

Questions?

Page 25: Information found in Lesson 1420-1. Basic Schematics ... in Series and Parallel Information found in Lesson 1420-1. Basic Schematics, Pictorials, Formulas and Wiring Diagrams on a

The End

Developed and Produced by the Instructors in the CIE Instruction

Department.

© Copyright 11/2011

All Rights Reserved / Nov. 2011