The generator studied in this paper is a HSPMG used in a dis-tributed power supply system, whose basic parameters are listed
in Table I. In order to reduce the end extension axial length, the
stator armature windings adopt the back rounded style. One side
of the coil is located in the slots and the other side is located
in the yoke back room. The rotor magnetic field is excited by
the SM-26U (SmCo) magnets which are protected by an alloy
sleeve (50 Mn18 Cr5). The permanent magnets have the rema-nence (Br) temperature coefficient of−0.03% K
−1
. The limited
working temperature of the permanent magnets is 350°C, and
the electrical conductivity is 1.2×10
6
S/m. The alloy sleeve
(50Mn18Cr5) contains C by 0.5%, Mn by 18%, Cr by 5%,
Si by 0.5%, and so on. Fig. 1 shows the HSPMG calculation
model. In order to analyze the influence of the rectifier load on
the generator, the electromagnetic field has to be coupled with
the external circuit. Fig. 2 gives the circuit of the three-phase
bridge-uncontrolled rectifier load.