Abstract
The improvement of efficiency, total harmonic distortion (THD), and cogging torque in outer rotor permanent magnet synchronous generator (PMSG) is the main concern in this paper. The paper focuses on handling the parameters of design, i.e. the geometry of the stator, the polar arc percentage, the air gap, the skew angle in rotor poles, the pole length, and the core steel class. The modification of geometric parameters related to the stator’s inductance is analyzed. Seventy-six cases are simulated, and results provide useful information for designing this type of machines. The study is carried out in a 5 kW PMSG.
Nomenclature
- δp
Polar arc percentage
- δi
Pole length
- δa
Air gap
- δs
Outer opening of the slot
- δt
Slot bottom diameter
- δy
Yoke length
- δl
Slot depth
- δd
Teeth width
- S
Conductors per phase (coil turns)
- Vn
Magnitude of voltage for nth harmonic
- FEA
Finite element analysis
- B
Magnetic flux density
- µ
Material permeability
- N
Signal samples
- I
Current in the coil
- A
Cross-sectional area of the core
Magnetic flux
- H
Harmonic component
- θp
Skew angle in poles
- FFT
Fast Fourier transform
Total flux in the air gap
Chord factor of winding
Winding constant
Reluctance of flux path
Rotor position in mechanical degrees
- G
Gauge of wire
Reluctance
- L
Inductance
- VTHD
Voltage total harmonic distortion
- PMSG
Permanent magnet synchronous generator
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