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How to calculate the exact number of turns of a toroidal transformer?

The following steps are required to calculate the number of turns of a toroidal transformer:

1. Measure the length and cross-sectional area of the core. If you already know the material of the core, you can also find out the corresponding allowable flux density from the table.

2. Determine the required output voltage and input voltage, and determine the transformation ratio when designing the transformer. The transformation ratio is the ratio of the output voltage to the input voltage, and it is equal to the ratio of the primary turns to the secondary turns, that is: Transformation ratio = output voltage / input voltage = primary turns / secondary turns

3. Calculate the average length of the transformer winding, the formula is as follows: Average length = (2×inner diameter + 2×outer diameter + magnetic circuit height) ÷ 4

4. Use a constant or adjustable transformer power supply to power one winding with a lower voltage (such as 10V), and measure the output voltage on the other winding.

5. Use the measured voltage ** to calculate the specific number of turns of the winding: n = (output voltage/input voltage) × n'. n' is the number of turns measured by the auxiliary winding (this value may not be very accurate, but it is enough for us to roughly calculate the number of turns of the transformer).

6. Repeat the above steps to calculate the number of turns of other windings to obtain the actual number of turns of each winding of the transformer.

Note: Pay special attention to safety issues when calculating the number of turns of the toroidal transformer. Avoid using high voltage and high current when confirming the operation. Take relatively small voltage and suitable size electrical components for test calculation.

EEIO Transformer has been focusing on toroidal transformers since its inception. Transformers wound with pure copper wire have high mechanical properties, high temperature resistance, and are not easy to break. They are made of high magnetic flux silicon steel sheet iron core and are basically noiseless. They are a good choice for audiophiles. If you need further consultation to learn more about relevant information, you are welcome to contact our online customer service staff at any time.