OTHER TRANSFORMERS

Question 1

is a type of transformer that uses air as the core material, lacking a traditional magnetic core. It relies on the mutual inductance between primary and secondary windings without a ferromagnetic core, making it suitable for applications where low coupling and minimal magnetic interference are desired.

Answer 1

Air Core Transformer

Question 2

The construction of an air core transformer involves winding insulated ______________ to form primary and secondary coils, arranged concentrically on a ____________ bobbin.

Answer 2

copper wire, non-magnetic

Question 3

The absence of a _____________ core distinguishes it from traditional transformers.

Answer 3

ferromagnetic

Question 4

The coil arrangement and absence of a core contribute to reduced ______________ but lower losses.

Answer 4

inductance

Question 5

are favored for applications requiring minimal magnetic interference and high-frequency operation.

Answer 5

Air core transformers

Question 6

2 Types of Air Core Transformers

Answer 6

1) Cylindrical
2) Toroidal Air

Question 7

In _______________________________, the primary and secondary windings are wound in a cylindrical or helical fashion. This shape can offer certain advantages in terms of winding arrangement and compactness.

Answer 7

Cylindrical Air Core Transformers

Question 8

________________________ have a donut-shaped core, where the primary and secondary windings are typically wound around a circular or toroidal (doughnut-shaped) form. It often exhibit desirable characteristics such as reduced magnetic leakage and compact design

Answer 8

Toroidal Air Core Transformers

Question 9

In summary, air core transformers are suitable for “high- frequency” applications where size and weight are less critical, while iron core transformers are more commonly used in “power distribution and industrial” applications where efficiency, compactness, and the ability to handle higher power levels are crucial.

Question 10

has only one single voltage winding which is common to both sides. This single winding is “tapped” at Vs various points along its length to provide a percentage of the primary voltage supply across its secondary load. It has the usual magnetic core but only has one winding, which is common to both the primary and secondary circuits.

Answer 10

Autotransformer

Question 11

Therefore, in an autotransformer the primary and secondary windings are linked together both electrically and magnetically. The main advantage of this type of transformer design is that it can be made a lot cheaper for the same VA rating, but the biggest disadvantage of an autotransformer is that it does not have the primary/secondary winding isolation of a conventional double wound transformer

Question 12

Therefore, in an autotransformer the primary and secondary windings are linked together both electrically and magnetically. The main advantage of this type of transformer design is that it can be made a lot cheaper for the same VA rating, but the biggest disadvantage of an autotransformer is that it does not have the primary/secondary winding isolation of a conventional double wound transformer

Question 13

The section of winding designated as the primary part of the winding is connected to the AC power source with the secondary being part of this primary winding. An autotransformer can also be used to step the supply voltage up or down by reversing the connections. If the primary is the total winding and is connected to a supply, and the secondary circuit is connected across only a portion of the winding, then the secondary voltage is “stepped-down” as shown.