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Recently, a permanent magnet type synchronous motor has been used widely for industry application. In the paper, we propose a novel self-start type permanent magnet synchronous motor with squirrel-cage. The motor is designed for high torque and high degree of efficiency. The motion characteristics are simulated. It is confirmed that the motor operates satisfactory from start to synchronous speed.
Wide use of permanent magnet synchronous motors produces a request for adding self-starting function to them. We propose a squirrel-cage rotor with permanent magnets for the self-starting synchronous motors. This paper shows the rotor configuration of a proposed motor and investigates the fundamental characteristics associated with the self-starting function.
Recently, permanent magnet type synchronous motor has been used widely for industry application. In the paper, we propose a novel self-start type permanent magnet synchronous motor with squirrel-cage and analyze the basic characteristics of the motor. We try to increase the efficiency by the rotor design with the finite element analysis.
The authors proposed a high power and low vibration novel segment type switched reluctance motor (SRM), but it had a problem of large torque ripple. We also proposed the novel segment type SRM with a 2-steps slide or skew rotor to reduce the torque ripple. We produced the experimental machine and measured the characteristics. The average torque was decreased slightly in comparison with the non slide...
The authors proposed a high power and low vibration novel segment type switched reluctance motor (SRM), but it had a problem of large torque ripple. We propose in this paper a novel segment type SRM with 2-step slide or skew rotor to reduce the torque ripple. We produce the experimental machine and confirm the characteristics. The average torque decreases slightly in comparison with the non slide...
The authors proposed a novel segment type switched reluctance motor (SRM) and showed the torque ripple could be reduced by increasing the phase number. This paper presents the relationship between the exciting current and the number of phases and segment cores. Transient analysis by the finite element method is carried out when the number of phases is 4 to 6. For torque ripple reduction the best number...
The goal of this research is to realize a complete position and speed sensorless system using a "half-wave rectified brushless synchronous motor" we proposed as a novel AC servo motor. This paper proposes an initial rotor position estimation method using the bias frequency component of a half-wave rectified brushless excitation. This technique is verified by simulations and experiments
Recent developments of power electronics technology, low-loss iron core materials and highly efficient permanent magnet, etc have made it possible to realize a small size, high or ultra-high speed, and high performance electrical drive system. We designed and built a trial ultra-high speed drive system of 2 poles, 5 kW, 240,000 rpm and had described our prototype system and showed some experimental...
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