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Ideal Transformer CalculatorIdeal transformer calculator is an easy-to-use online tool which helps engineers to determine the relationships between voltage, current, and number of turns in a theoretical transformer with 100% efficiency. A transformer has two coils (primary and secondary) to transfer the energy from one circuit to another. In the ideal transformer all the magnetic field from the primary coil passes through the secondary coil, i.e. the ideal transformer has no power loss. This tool uses the following equation to calculate the voltage at the secondary coil: Vs = Vp × Ns / Np, where: Vs – voltage at the secondary coil, Vp – voltage at the primary coil, Ns – number of windings of the secondary coil, Np – number of windings of the primary coil. The current at the secondary coil can be calculated using the following equation: Is = Ip × Np / Ns, where: Is – current at the secondary coil, Ip – current at the primary coil, Np – number of windings of the primary coil, Ns – number of windings of the secondary coil. You might also find helpful: Transformerless Power Supply Calculator Frequently Asked QuestionsWhy students and professionals need ideal transformer calculator?For ProfessionalsEngineers often use the "Ideal" model as a starting point for transformer design and power distribution planning. This calculator allows for rapid prototyping and baseline calculations before adding real-world variables like flux leakage or winding resistance. It is an essential tool for verifying if a custom-wound transformer will meet the required voltage specifications or for calculating impedance matching in audio and RF applications. For StudentsThe ideal transformer is one of the most critical concepts in Electrical Engineering 101. This tool helps students visualize the inverse relationship between voltage and current — showing that as voltage steps up, current must step down to conserve power. It's a perfect "sanity check" for complex homework problems involving power systems, magnetic circuits, and Faraday's Law of Induction. Application Examples
What is the "Turn Ratio" of a transformer? The turn ratio is the ratio of the number of turns in the primary winding to the number of turns in the secondary winding. It determines whether the transformer is a "Step-Up" or "Step-Down" type.
What happens to the current in a step-up transformer? In a step-up transformer, while the voltage increases, the current decreases proportionally. This ensures that the total power remains constant.
Why is impedance matching important in transformers? Transformers can change the "apparent" impedance of a load. This is vital in audio engineering and communications to ensure maximum power transfer between a source (like an amplifier) and a load (like a speaker).
How to calculate the secondary voltage for a step-down transformer?Just enter number of windings of the primary and secondary coils and primary voltage, for example:
The calculator shows the secondary voltage will be 46 V. How to calculate the secondary current for a step-up transformer?Just enter primary and secondary voltages and primary current, for example:
The calculator finds the secondary current: 1 A. |
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