Analyze transmitter and receiver performance using clear engineering inputs. Compare watts, voltage, current, and losses. Get dependable efficiency insights for wireless charging systems quickly.
| Parameter | Example Value | Unit | Meaning |
|---|---|---|---|
| Transmitter Voltage | 48 | V | Measured AC or DC side value |
| Transmitter Current | 3.2 | A | Source current at the transmitter |
| Transmitter Power Factor | 0.96 | - | Real power correction term |
| Receiver Voltage | 24 | V | Delivered side voltage |
| Receiver Current | 5.3 | A | Delivered side current |
| Receiver Power Factor | 0.98 | - | Load-side real power factor |
| Auxiliary Losses | 13.7 | W | Inverter, rectifier, and cable losses |
| Gross Efficiency | 84.53 | % | Load power divided by input power |
| Net Efficiency | 75.24 | % | Net delivered power divided by input power |
Input Power = Transmitter Voltage × Transmitter Current × Transmitter Power Factor
Load Power = Receiver Voltage × Receiver Current × Receiver Power Factor
Auxiliary Loss = Inverter Loss + Rectifier Loss + Cable Loss
Gross Efficiency = (Load Power ÷ Input Power) × 100
Net Delivered Power = Load Power − Auxiliary Loss
Net Efficiency = (Net Delivered Power ÷ Input Power) × 100
Coil to Coil Efficiency = ((Load Power + Rectifier Loss) ÷ (Input Power − Inverter Loss)) × 100
Power Density = Net Delivered Power ÷ Effective Coil Area
Gap Transfer Index = Net Delivered Power ÷ Air Gap
Stability Index = Net Efficiency × Alignment Fraction × Coupling Coefficient
Enter the measured transmitter voltage, current, and power factor. These values define the real electrical power entering the wireless transfer system.
Enter the measured receiver voltage, current, and power factor. These values estimate the real power reaching the receiving side load.
Add inverter, rectifier, and cable losses. These losses separate gross transfer efficiency from net delivered efficiency.
Fill in operating frequency, air gap, coupling coefficient, alignment percentage, and coil area. These values help compare link quality and practical transfer behavior.
Press the measure button. The result appears above the form, directly below the header. Review the table, chart, and export options for documentation.
Wireless power transfer efficiency describes how much measured source power becomes useful receiver power. It helps engineers compare coil layouts, alignment quality, and conversion stages using one clear performance indicator. A high percentage usually means better magnetic coupling, smaller conversion losses, and more effective energy delivery across the air gap.
Measured efficiency is more useful than a rough estimate when prototype hardware is available. This calculator uses transmitter and receiver electrical readings, then separates gross and net performance. Gross efficiency shows how much receiver power exists before listed auxiliary losses. Net efficiency shows how much usable power remains after inverter, rectifier, and cable losses are subtracted.
Operating frequency affects switching behavior, magnetic design, and resonant tuning, but it does not directly replace measured power. Air gap strongly influences flux linkage and therefore received power. Larger gaps generally increase leakage and reduce practical efficiency. Misalignment has a similar effect because it lowers coupling and shifts the magnetic field away from the strongest receiving position.
Power factor matters whenever voltage and current are not perfectly in phase. Ignoring it can overstate true input or output power. This is why the calculator multiplies voltage, current, and power factor on both sides of the link. The tool also reports power density, gap transfer index, and a stability index for fast design comparisons across different prototypes or test points.
Use the results to benchmark pads, compare resonant settings, or document performance during validation tests. Exported CSV and PDF reports make it easier to share outcomes with teammates, clients, or quality reviewers. For repeatable testing, always measure under steady alignment, load, and thermal conditions so the efficiency values remain meaningful.
It shows how much real input power becomes useful output power at the receiver. Higher values indicate a better performing transfer link with lower overall losses.
Gross efficiency compares receiver load power with source input power. Net efficiency also subtracts listed auxiliary losses, so it better reflects usable delivered power.
Power factor converts apparent electrical readings into real power. Without it, voltage and current can overstate actual transferred energy, especially in resonant systems.
A larger gap usually weakens magnetic coupling and reduces received power. That often lowers both gross and net efficiency during practical testing.
It helps interpret link quality. A stronger coupling coefficient usually means better magnetic interaction between coils and more stable transfer under the same conditions.
Coil to coil efficiency focuses on the magnetic transfer stage. Net efficiency includes listed conversion and wiring losses, so it is usually lower.
Power density expresses net delivered power per coil area. It helps compare compactness and output concentration between different coil layouts or designs.
Export after a stable measurement set is entered. The files are useful for test documentation, design reviews, audits, and side by side prototype comparisons.
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.