- Section 11.1 Transformer Operation.
- • Transformer Operation.
- • Transformer Losses.
- • Off Load Current.
- • Volts per Turn.
- Section 11.2 Magnetic Circuits & Transformer Cores.
- • Magnetic Circuits & Cores.
- • Magnetic Flux.
- • Reluctance.
- • Permeability.
- • Common Core Types.
- Section 11.3 Power Transformers.
- • Tappings.
- • Toroidal Power Transformers.
- • Isolation.
- • Autotransformers.
- Section 11.4 Audio Transformers.
- • AF Transformers.
- • Microphone Transformers.
- • 100V Line Transformers.
- Section 11.5 Radio frequency Transformers.
- • RF Transformers.
- • VHF Transformers.
- • UHF Transformers.
- • Screening.
- Section 11.6 Transformers Quiz.
Transformers have been an essential component in electrical and electronic circuits since the 1830s and although new technologies in some electronic circuits have reduced the need for transformers, they are still essential in many applications.
How Transformers work.
This module describes how transformers work, and how the design of both the transformer coils, and the core on which they are wound affects the efficiency of the transformer. Detailed descriptions of many types of transformer are also given together with typical applications.
Transformers can allow separate circuits to be physically isolated from each other whilst still allowing current and voltage to pass between the two. They can also be used to reduce or increase the voltage or current that is passed as required.
Another common use for transformers can be to match input and output impedances where the output of one circuit needs to pass an AC signal to the input of another. The advantage of this technique is that the transfer can be achieved with practically no loss of power in the transfer.
Transformers of many types.
Transformers are made in a very wide range of sizes and configurations, from the enormous power transformers, weighing many tons that connect the different parts of the public electricity grid together, to tiny transformers consisting of nothing more than a few turns of wire, found in UHF radio equipment.