Permanent magnet excited synchronous motors
1955; Institute of Electrical and Electronics Engineers; Volume: 74; Issue: 2 Linguagem: Inglês
10.1109/ee.1955.6439788
ISSN2376-7804
Autores Tópico(s)Sensorless Control of Electric Motors
ResumoFRACTIONAL-HORSEPOWER synchronous motors are generally available for quantity production in only the reluctance or hysteresis types. The reasons for this are: the simplicity of their rotor constructions, because of the omission of d-c excitation; and the possibility of assembling the rotors of either type in standard induction motor frames. Unfortunately, these advantages are offset by inferior performance characteristics, such as low efficiency, low-power factor, and low output, when compared to that of the same size induction motor. The locked rotor torque is also low and in the reluctance type, extremely variable.
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