Transformer Current And Turn Ratio Calculator

Transformer Turn Ratio Formula:

\[ \text{Ratio} = \frac{\text{Turns Primary}}{\text{Turns Secondary}} = \frac{\text{Current Secondary}}{\text{Current Primary}} \]

Turns Primary:

turns

Turns Secondary:

turns

Current Primary:

Current Secondary:

Turn Ratio (Primary/Secondary):

Current Ratio (Secondary/Primary):

Unit Converter ▲

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1. What is Transformer Turn Ratio?

The transformer turn ratio is the ratio of the number of turns in the primary winding to the number of turns in the secondary winding. This ratio determines the relationship between primary and secondary voltages and currents in a transformer.

2. How Does the Calculator Work?

The calculator uses the transformer turn ratio formula:

\[ \text{Ratio} = \frac{\text{Turns Primary}}{\text{Turns Secondary}} = \frac{\text{Current Secondary}}{\text{Current Primary}} \]

Where:

Turns Primary — Number of turns in primary winding
Turns Secondary — Number of turns in secondary winding
Current Primary — Current in primary winding (Amperes)
Current Secondary — Current in secondary winding (Amperes)

Explanation: The turn ratio determines how the transformer steps up or steps down voltage and current between primary and secondary circuits.

3. Importance of Turn Ratio Calculation

Details: Accurate turn ratio calculation is crucial for transformer design, voltage transformation, current transformation, impedance matching, and ensuring proper operation in electrical systems.

4. Using the Calculator

Tips: Enter the number of turns for both primary and secondary windings, and the corresponding currents. All values must be positive numbers greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What is the relationship between turn ratio and voltage?
A: The voltage ratio is equal to the turn ratio: V_primary/V_secondary = Turns_primary/Turns_secondary

Q2: How does turn ratio affect current?
A: The current ratio is inverse to the turn ratio: I_secondary/I_primary = Turns_primary/Turns_secondary

Q3: What is an ideal transformer?
A: An ideal transformer has no losses and follows the turn ratio equations exactly for both voltage and current.

Q4: How does turn ratio affect impedance?
A: The impedance transformation follows the square of the turn ratio: Z_primary/Z_secondary = (Turns_primary/Turns_secondary)²

Q5: What are typical turn ratios used in practice?
A: Turn ratios vary widely depending on application, from 1:1 for isolation transformers to high ratios like 1000:1 for instrument transformers.