an investigation of dual stator winding induction machines

From the simulation results given in Figure 2.9, it is found that the ratio of the stator
current densities increases when τ 2 increases while the ratio of the stator current
densities decreases when the ratio of the surface current density decreases.
Using the outlined design procedures, the design of a 3hp dual winding machine with
specifications given in Table 2.1 and three mechanical power partition factors are given
in Table 2.2. The sum of the air flux densities of two stator winding sets is greater than
the design given in Section 2.1 while the surface current density of each winding set is
slightly lower than the one for the normal single winding induction machine.
Table 2.2 Machine design results
Power partition factor α = 0.
4 α = 0.
5 α = 0.
6
Given
parameters
Calculated
parameters
B max (T) 0.85 0.85 0.85
K 1 1 1
K s1
(
K s2
(
J 1 (
J 2 (
s1 K s
1 J s
2
2
J 1 1 1
B 1 (T) 0.42 0.55 0.69
B 2 (T) 0.63 0.55 0.46
2
A cm ) 182.4 173.2 165.3
2
A cm ) 182.4 173.2 165.3
N s1
141 107 85
N s2
282 322 384
2
A mm ) 7.8 7.4 7.1
2
A mm ) 7.8 7.4 7.1
82