In Figure
9,
Fc1 is equivalent magnetic potential of tile-shaped permanent magnet,
Fc2 is equivalent magnetic potential of rectangle permanent magnet,
Fi is equivalent magnetic potential of electromagnetic winding,
Fad is longitudinal axis component of armature reaction magnetic potential,
Gm1 is equivalent magnetic permeance of tile-shaped permanent magnet,
Gm2 is equivalent magnetic permeance of rectangle permanent magnet,
Ge is equivalent magnetic permeance of electromagnetic winding,
Gδ is main air gap permeance,
Gmδ1 is additional air gap permeance between tile-shaped permanent magnet and pole shoe,
Gmδ2 is additional air gap permeance between rotor core and tile-shaped permanent magnet,
Gmδ3 is additional air gap permeance between rotor core and rectangle permanent magnet,
Geδ1 is additional air gap permeance between electromagnetic winding and salient-pole,
GP is pole boots permeance,
Gt is stator tooth permeance,
Gk is salient-pole electromagnetic rotor core permeance,
Gj1 is stator yoke permeance,
Gj2 is rotor core permeance which is from tile-shaped permanent magnet to rectangle permanent magnet;
Gj3 is rotor core permeance which is from rectangle permanent magnet to tile-shaped permanent magnet,
Gmσ1 is leakage permeance between tile-shape permanent magnet axial end surface,
Gmσ2 is leakage permeance between tile-shaped permanent magnet side surface,
Gmσ3 is leakage permeance between the two ends of pole shoes,
Geσ1 is the leakage permeance between the two ends of electric excitation winding,
Geσ2 is leakage permeance between electric excitation winding side surface,
Fm is total magnetic potential drop between the two ends of tile-shape permanent magnet,
Φmδ is no-load total magnetic flux of tile-shaped permanent magnet,
Φeδ is no-load total magnetic flux of electric excitation winding,
ΦmU is the no-load effective magnetic flux through the air-gap,
Φmσ1 is leakage magnetic flux between tile-shape permanent magnet axial end surfaces,
Φmσ2 is leakage magnetic flux between tile-shape permanent magnet side surfaces,
Φmσ3 is the no-load leakage magnetic flux between the two ends of pole shoes,
Φeσ1 is leakage magnetic flux that is converted to the two ends of electric excitation winding,
Φeσ2 is leakage flux between poles which is converted to the two ends of electric excitation winding.
Since the magnetic circuit of double-radial permanent magnet part and salient-pole electromagnetic part is essentially independent of each other, permanent magnet magnetic circuit and electric excitation magnetic circuit are analyzed separately to simplify the analysis process.