Advanced mode

User input parameters

Label Symbol Value in easy mode
Throw * It is the coil pitch = number of slot pitches between coil input and coil output
Commutator pitch Yc Number of commutator segments between the segment connected to the coil input and the segment connected to the coil output.
Coil layout * Coil layout inside the slot –Superimposed or Adjacent

Building the winding architecture – Advanced mode – Main principles
Building the winding architecture - Advanced mode
1 Selection of the Advanced mode for building the winding architecture.
2

Selection of the thrown (coil pitch)

The proposed solutions depend on the number of slots and the number of poles.

Throw <= ceil (number of slots / number of poles)
3

Commutator pitch.

Only the options compatible with a valid lap/wave winding are offered.
4

Definition of the coil layout i.e. how the coil sections are distributed into the slot.

The two possible choices are:
  • Superimposed = At least two superimposed coils into one slot
  • Adjacent = At least two adjacent coils into one slot

By default, the superimposed option is selected.
5 Icon to restore default input values. Default values are those which define the winding architecture by using the automatic mode.
6 Icon to apply inputs. Pressing the enter key twice applies inputs too.
7 Icon to export winding data into a text file


Graphical example of a winding defined with throw =5, commutator=-2, superimposed layout

It corresponds to a lap, duplex, regressive winding.

Winding Architecture – Outputs

Outputs are quite like 3-phase winding, but some specific parameters arise when dealing with DC machine winding. For shake of completeness the parameters are listed in the tables below.

Characterization - Winding

Label Symbol Tooltip, note, formula
No. poles p Number of rotor pole pairs. 2p = number of poles.
No. slots Nslots Number of stator slots
No. Layers Nlayers Number of layers – For a DC winding it is always equal to 2
Winding type * The winding type: Lap or wave
Plex * The plex (simplex, duplex or triplex)
Coil connection *

Connection type: Progressive or regressive

Progressive connection: Commutator segments are connected following the same direction as winding (i.e., commutator pitch is positive).

Regressive connection: Commutator segments are connecting following opposite direction as winding (i.e., commutator pitch is negative).
Commutator pitch Yc Number of commutator segments between the segment connected to the coil input and the segment connected to the coil output.
No. parallel paths Ppaths

Number of parallel paths.

For a wave winding it is equal to twice the plex.

For a lap winding it is equal to number of poles * plex
Coil layout * Coil layout inside the slot – Full, Superimposed or Adjacent.
Throw (coil pitch) * Number of slot pitch between coil input and coil output.

Characterization - Coil

Label Symbol Tooltip, note, formula
No. turns per coil Turns Number of turns per coil
No. turns in series N_turns

Number of turns in series

N_turns=N_coils/(2×P_paths )
No. conductors N_cond

Total number of conductors

N_coils=2×N_slots×Turns

Lengths

Label Symbol Tooltip, note, formula
Total conductor length * Total conductor length.
Mean turn length *

Mean turn length.
Coil connection length *

Additional length corresponding to the connections between coils and commutator segments.

Axial overall length * Axial overall length. Length between the two extremities of the winding i.e. between connection side and opposite connection side.

Coil connection