Abstract
This paper describes a study on the improvement of the dehydration performance of the conventional washing machine model. Recently, as interest in improving the dehydration performance of washing machines has increased, the need for a study on a high-speed electric motor has emerged. However, this conventional spoke-type PMSM has difficulty in speeding up due to the following problems. First, field weakening control is indispensable for high-speed operation of an electric motor. This control method is a big problem in causing torque drop and irreversible demagnetization of the motor. Moreover, the centrifugal force increases during high-speed operation, which adversely affects the stiffness of the motor. Therefore, in this paper, a new rotor shape of spoke-type PMSM was proposed to solve the above problem.
Highlights
Background of StudyAs problems of depletion of petroleum resources and environmental pollution have emerged, interest in the development of high-performance electric motor technology is increasing
The rare earth used in the core parts of high-performance electric motors has large price fluctuations, and stable supply and demand are difficult because the reserves of resources are concentrated in several countries [1,2]
A permanent magnet is placed on the q-axis path of the conventional spoke-type PMSM, and the iron core is located in the case of the I spoke-type PMSM
Summary
As problems of depletion of petroleum resources and environmental pollution have emerged, interest in the development of high-performance electric motor technology is increasing. SynRM has a large torque ripple and has limitations in replacing rare earth permanent magnet motors due to its low torque density [5]. Another solution is to use Ferrite PM instead of a rare earth permanent magnet. The need for high-speed operation of electric motors is increasing, but these conditions cannot be satisfied with conventional spoke-type PMSM. In order to control a motor, it must be operated within a range that satisfies the voltage and current limits, so when the motor speed increases, field weakening control is performed This causes irreversible demagnetization of the permanent magnet and lowers the torque density. In this paper, a study on the shape of a rotor capable of high speed was conducted to improve the dehydration performance of conventional spoke-type PMSM
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