QuickField

A new approach to field modelling
Language:
Global English Deutch Espanol Francais Italiano Danmark Ceske Chinese Pycckuü

>> >> >>

Brushless DC motor

A brushless DC motor with permanent magnets and three phase coil excitation.

Problem Type:
Plane problem of DC magnetics.

Geometry:
Three-phase permanent magnet synchronous motor Calculate the inductance of a single stator phase coil in a permanent magnet synchronous motor Cobalt alloy Steel N S N S A A A A B B B B C C C C Ø50 Ø10 40

Axial length of the motor is 40 mm.

Given:
The four magnets are made of Samarium-Cobalt with relative permeability of 1.154 and coercive force of 550 kA/m.

The current densities for the coil slots are as follows:
phase A: 1.3 A/mm2,
phase B: -1.3 A/mm2,
phase C: 0 A/mm2

The inner and outer frames are made of Cobalt-Nickel-Copper-Iron alloy. The B-H curve for the Cobalt-Nickel-Copper-Iron alloy:

H (A/m)

20

60

80

95

105

120

140

160

180

200

240

2500

B (T)

0.19

0.65

0.87

1.04

1.18

1.24

1.272

1.3

1.32

1.34

1.36

1.45

The B-H curve for the steel:

H (A/m)

400

600

800

1000

1400

2000

3000

4000

6000

B (T)

0.73

0.92

1.05

1.15

1.28

1.42

1.52

1.58

1.60

Results:
Flux density in brushless DC motor with permanent magnets and three phase coil excitation:

Flux density in brushless DC motor

  • Video:
  • Watch on YouTube
  • View simulation report in PDF
  • Download simulation files (files may be viewed using any QuickField Edition).