1. What is the Transformer Current Formula?

The transformer current formula relates the primary and secondary currents to the primary and secondary voltages in a transformer. It's based on the principle of conservation of energy in an ideal transformer.

2. How Does the Calculator Work?

The calculator uses the transformer current equation:

Where:

• \( I_{secondary} \) — Secondary current (amps)
• \( I_{primary} \) — Primary current (amps)
• \( V_{primary} \) — Primary voltage (volts)
• \( V_{secondary} \) — Secondary voltage (volts)

Explanation: The equation shows that current is inversely proportional to voltage in a transformer - when voltage increases, current decreases proportionally, and vice versa.

3. Importance of Current Calculation

Details: Accurate current calculation is crucial for transformer sizing, circuit protection, and ensuring proper operation of electrical systems.

4. Using the Calculator

Tips: Enter primary current in amps, primary and secondary voltages in volts. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: Does this formula work for all transformers?
A: This formula works for ideal transformers. Real transformers have small losses due to resistance, leakage flux, and core losses.

Q2: What if I know the turns ratio instead of voltages?
A: The voltage ratio equals the turns ratio, so you can substitute turns ratio for V_primary/V_secondary.

Q3: How does transformer efficiency affect the calculation?
A: For more accurate results with real transformers, divide the result by the efficiency (as a decimal, e.g., 0.95 for 95% efficiency).

Q4: Can this be used for step-up and step-down transformers?
A: Yes, the formula works for both step-up (V_secondary > V_primary) and step-down (V_secondary < V_primary) transformers.

Q5: What are typical current ranges for transformers?
A: Current ranges vary widely based on transformer size - from milliamps in small electronics to thousands of amps in power distribution.