Among their topics are the principle of a direct current generator, armature reaction
, parallel operations of direct current generators, the performance of direct current machines, commutation, applications, and stepper motor.
By analyzing the efficiency plot of a single phase transformer we can estimate losses in transformer due to winding resistance and armature reaction.
This graph is also measure of voltage drop across terminal of transformer due to copper losses in winding and armature reaction.
IPMSM's interior permanent magnets in rotor are a favorite for vehicular applications due to their mechanical integrity and stronger armature reaction.
IPMSM is a convenient motor to operate in high speeds due to its mechanical integrity, and strong armature reaction effect enables to operate in a wide speed range in field weakening region.
Radial and tangential components of the flux density due to PM, rotor DC excitation current and armature reaction current acting together (on-load condition) are given in Figs.
With these results, we can analyze the armature reaction and the DC excitation current effects in the demagnetization risk of the magnets.
To study the effect of armature reaction on the demagnetization risk of ferrite magnets, we show in Fig.
Several details of the analytical model will be given when evaluating the armature reaction effect.
The advantage of the proposed lumped equivalent circuit is due to the fact that it takes into consideration the armature reaction effect.
Armature reaction will cause a distortion of the distribution of the magnetic field in the air gap of the PM generator.
The d-axis component of armature reaction by the direction of permanent magnet axis will affect the strength of the primary magnetic field in the air gap (Fig.