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4 Pole 6 Coil Axial Flux Generator Calculator

Calculate electrical frequency, phase voltage, and line voltage for a 4-pole, 6-coil axial flux permanent magnet generator. Verify RPM, flux, and winding turns.

Estimate open-circuit voltage

Configure parameters for a 4-pole, 6-coil axial flux generator.

10–10,000 RPM; screening range only.

50–2,000 mm; magnet annulus, not housing.

50–2,000 mm; must be smaller than outer diameter.

0.1–1.5 T; sinusoidal fundamental peak.

1–5,000 whole turns per coil. (6 coils total, 2 per phase).

View results ↓
Screening complete
Phase voltage (RMS)
28.05V
Open circuit, per phase
Star line voltage (RMS)
48.59V
√3 × phase
Electrical frequency
16.67Hz
4 poles × RPM / 120
Active annulus area
0.0393m²
One annulus
Rated electrical power: not determined.

Geometry and open-circuit voltage cannot establish a continuous kW rating. Current, winding resistance, losses and cooling must be checked.

Next: verify flux and winding layout, then specify load, cooling, duty cycle and voltage/current limits for engineering review.

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 limits theoretical maximum

A 4-pole 6-coil fractional-slot concentrated winding typically has a fundamental winding factor of 0.866, meaning 13.4% of the theoretical coil voltage is lost due to phase spread.

Source: Standard electrical machine design texts.

Methodology & Sources

SourceUsageLimitation
AFPM Motor Calculator mathReviewed: September 24, 2026Calculates frequency and induced EMF for a 3-phase, 4-pole, 6-coil axial flux generator.Provides open-circuit estimates; does not calculate under-load voltage drop, armature reaction, or core saturation.
Winding factor (kw = 0.866) referenceReviewed: September 24, 2026Supports the 0.866 winding factor used for 4-pole, 6-coil, 3-phase fractional-slot configurations.Theoretical fundamental winding factor; exact real-world value depends on magnet width and coil span.

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Need to prototype or manufacture a custom axial flux generator? Send us your requirements (RPM, voltage target, torque limit, packaging constraints) and our engineers will assist with feasibility and pricing.

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