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Audio Transformer, its Types and Impedance Ratio
https://circuitdigest.com/tutorial/audio-transformer#:~:text=To%20calculate%20the%20impedance%20ratio%20we%20need%20to,S%20is%20the%20voltage%20ratio%20of%20the%20transformer.
Audio Transformer, its Types and Impedance Ratio
https://circuitdigest.com/tutorial/audio-transformer
To calculate the impedance ratio we need to square the transformer turns ratio or the transformer voltage ratio. In the above equation, Z P is primary impedance and Z S is secondary impedance. N P /N S is the turns ratio of the transformer and V P /V S is the voltage ratio of the transformer.
Output Transformer Impedance
https://www.radioremembered.org/outimp.htm
All we need to do is determine the turns ratio of the transformer, and with that information we can calculate what impedance will be reflected back to the primary with a given load on the secondary. The test equipment to do this is quite simple; an ac voltmeter and a variable source of 60 Hz ac is all we need. To determine the turns ratio we apply an ac voltage to the primary, and …
Chapter 5: Understanding Impedance In Audio Transformers
http://www.lundahl.se/wp-content/uploads/datasheets/PSW_WhitePaper_Download_Chapter_5.pdf
As mentioned above, all audio input and output circuits, all loudspeakers, all microphones, and all transformers use impedance as a measurement of electrical value. This is because they are AC devices, not simple DC circuits. But among AC circuits, only transformers (and their first cousins autoformers) possess the unique property to
How to calculate transformer impedance? | GoHz.com
http://www.gohz.com/how-to-calculate-transformer-impedance
It is proportional to radial size of windings plus gap x square of number of turns and inversely proportional to height of windings. In today's transformers % impedance varies 2-6 % for distribution units and 6-25 % for power transformers. %R varies from 1.5 % (100 kVA) to 0.10 % (500,000 kVA) .and %X 1.5- 25 % .
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