4 Pole 6 Coil Axial Flux Generator Calculator
Estimate open-circuit voltage and frequency for a 4-pole, 6-coil axial flux generator.
Calculate open-circuit voltage4-Pole, 6-Coil Layout at a Glance
Key Design Insights for 4 Pole 6 Coil Topologies
Frequency is strictly tied to RPM
A 4-pole machine produces 2 electrical cycles per mechanical revolution. Electrical frequency (Hz) equals RPM divided by 30.
Source: Derived from f = (Poles x RPM) / 120.
Voltage scales with flux, turns, and speed
Open-circuit voltage is proportional to speed, number of turns per phase, and peak magnetic flux in the air gap.
Source: Faraday’s law of induction applied to a 4-pole 6-coil topology.
Winding factor depends on the actual coil layout
The calculator starts at kw = 0.866, a benchmark for one common 3-phase, 6-slot/4-pole concentrated winding. Treat it as an example and change it when your coil axes, layer arrangement, phase belts, or pitch differ.
Source: Torreggiani et al. (2019) report a 6-slot/4-pole benchmark; Yokoi et al. (2016) explain why winding layout changes the factor.
Need a winding-aware review of the estimate? Share your coil layout and operating requirements with the engineering team.
Request engineering reviewMethodology & Sources
| Source | Usage | Limitation |
|---|---|---|
| Calculator model and equationsReviewed: September 30, 2026 | f = (4 × RPM) / 120; Ephase = √2 × π × f × turns per phase × kw × flux per pole. | Uses the sinusoidal field and annulus assumptions shown beside the result. It does not calculate under-load voltage drop, armature reaction, or core saturation. |
| 6-slot/4-pole winding-factor benchmarkReviewed: September 30, 2026 | Reports a 0.866 winding factor for an analyzed 6-slot/4-pole concentrated-winding combination. | This is a benchmark for the winding configuration studied, not a measured factor for every six-coil axial-flux generator. |
| Winding factor and fractional-slot layout parametersReviewed: September 30, 2026 | Formulates winding factor in relation to slot/pole combination, layer count, phase belts, and coil pitch. | Use the value for the actual coil layout and harmonic of interest; the calculator default is only a starting example. |
4-Pole, 6-Coil Generator Calculator FAQ
What does this 4-pole, 6-coil generator calculator estimate?
It estimates electrical frequency, open-circuit RMS phase voltage, and star-connected line voltage from speed, active annulus dimensions, peak fundamental air-gap flux density, winding factor, and turns per coil. It does not predict loaded voltage or rated power.
Is a winding factor of 0.866 correct for every 4-pole, 6-coil winding?
No. The 0.866 default is a reference value for a common 3-phase, 6-slot/4-pole concentrated winding. A coreless coil layout can differ; calculate the fundamental factor from the actual coil axes, connection, layer arrangement, and pitch.
Does the result give the generator’s rated power?
No. Open-circuit voltage and geometry do not establish a continuous power rating. Rated power also requires load current, winding resistance, magnetic and copper losses, cooling, duty cycle, and mechanical limits.
Why is line voltage shown for a star connection?
For a balanced three-phase sinusoidal winding connected in star, line-to-line RMS voltage is √3 times phase RMS voltage. A delta connection or rectifier output needs a different interpretation.
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