Analyze electrical frequency relationships with practical voltage formulas and visuals. Test multiple scenarios quickly today. Save graphs, tables, and reports for dependable engineering reviews.
Select a model, enter the required values, and press calculate. The result appears above this form and stays visible for export.
Transformer EMF: V = k × f × N × Φmax
Inductor AC: V = 2πfLI
Capacitor AC: V = I / (2πfC)
Motor V/f: V = Vboost + (f / fbase) × (Vbase − Vboost)
For frequencies at or above base frequency, voltage is limited to base voltage.
This tool is best for engineering estimation, educational review, and quick validation checks before deeper circuit simulation.
| Method | Inputs | Calculated Voltage | Comment |
|---|---|---|---|
| Transformer EMF | f = 50 Hz, N = 200, Φ = 0.01 Wb, k = 4.44 | 444 V | Useful for estimating induced voltage from magnetic flux. |
| Inductor AC | f = 60 Hz, L = 0.15 H, I = 3 A | 169.65 V | Shows voltage rise with frequency for constant current. |
| Capacitor AC | f = 60 Hz, C = 0.0001 F, I = 2 A | 53.05 V | Voltage falls as frequency increases for constant current. |
| Motor V/f | f = 35 Hz, base = 50 Hz, 400 V, boost = 20 V | 286 V | Represents a practical low-speed drive scaling rule. |
Not by itself. Frequency needs a circuit or machine model. This calculator uses transformer, inductor, capacitor, and motor drive relations to produce a voltage estimate.
Different devices connect frequency and voltage differently. A transformer depends on turns and flux, while AC reactance depends on inductance or capacitance. Motor drives usually follow a V/f schedule.
For the inductor, capacitor, and V/f methods, the reported value is treated as effective AC voltage. In transformer mode, the formula also gives the standard effective voltage estimate when using the common sine-wave constant.
It adjusts the transformer EMF relation for waveform assumptions. For sine waves, engineers commonly use 4.44. Changing the constant lets you test alternate waveform or design assumptions.
Capacitive reactance shrinks when frequency rises. If current stays fixed, voltage across the capacitor drops as frequency increases. The chart makes that inverse relationship easy to see.
Inductive reactance grows with frequency. With constant current, higher reactance means higher voltage across the inductor. That is why the inductor graph slopes upward.
Motor drives often keep voltage proportional to frequency below base speed. That helps maintain magnetic flux and torque characteristics while preventing unnecessary overvoltage at low speeds.
Use it for estimation, checking, and learning. Final design should still be verified with equipment ratings, harmonic assumptions, thermal limits, standards, and detailed simulation or testing.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.