Winding

Introduction

In Motor Factory, when the classical winding type or the hairpin winding type can be considered, this choice must be done in the Design area, in the environment “Specification”.

Table 1. Classical or hairpin winding technology: how to make the choice?


1 In Motor Factory – Design environment – Select the specification – Section “Topology”
2 Classical winding technology
3 Hairpin winding technology.
Note: Hairpin winding technology is available only for the 3-Phase inner rotor machine.

3-Phase and polyphase windings

The polyphase nature of the winding is not an option available in the machine specification. To design a polyphase machine, the user must select the appropriate machine type.

In that case, the winding design environment includes polyphase windings up to 15 phases.
Note: There are many similarities between the 3-Phase and the polyphase windings. That is why it is useful to refer to the explanations and illustrations provided for the “classical winding”. Indeed, most of the examples and images shown for classical winding are for a 3-Phase winding to facilitate comprehension and clarity, since it is the most widely used.

Structural data - Validity domain

The number of slots can be chosen over the range [3, 2400].

The number of poles can be chosen over the range [2, 400].

The number of phases can be chosen over the range [3,15]. Only odd values are considered.

Note: Our process for building and computations has been qualified over the following data ranges:
  • Range for number of slots [3, 90]
  • Range for number of poles [2, 80]
  • Range for number of phases [3,15]

Working beyond these bounds is possible, but accuracy of the results is the responsibility of the user.

Three tables representing a selection of combinations of number of poles and number of slots for the most typical number of phases (three, five and seven) are presented below.

In these tables the number of slots goes from n to 90 (with n the number of phases) and the number of poles goes from 2 to 80.
Note:
  • For three-phase machines, the grey cells correspond to combinations with a number of slots per pole per phase strictly lower than 0.25. These cases are not allowed by our process.

    Note: if the hairpin winding type is selected, only configurations with an integer number of slots per pole and per phase are allowed.

  • The black cells correspond to forbidden combinations from a technological point of view.
  • The numbers indicated in the other cells correspond to reduction coefficients to the resulting model in Altair Flux. For example, “1” means that the whole geometry is represented. “2” means that only half of the machine is represented, and “n” means that the 1/nth of the geometry is represented in the Flux® environment. That means it gives a general idea of the size of the model in Altair Flux software. Higher value gives the reduction coefficient and faster computation for a given motor.
Figure 1. Combinations No. poles / No. slots for a 3-Phase machine


Figure 2. Combinations No. poles / No. slots for a 5-Phase machine


Figure 3. Combinations No. poles / No. slots for a 7-Phase machine


Figure 4. Combinations No. poles / No. slots for a 9-Phase machine


Figure 5. Combinations No. poles / No. slots for a 11-Phase machine


Figure 6. Combinations No. poles / No. slots for a 13-Phase machine


Figure 7. Combinations No. poles / No. slots for a 15-Phase machine


Subsections

Introduction & Terminology

To read the full introduction dedicated to the classical and hairpin winding technologies, please refer to Introduction.

Classical & hairpin windings

For more details, please refer to Classical & hairping.