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Characteristics of permanent magnet synchronous motor
The permanent magnet synchronous motor has simple structure, small size, light weight, low loss and high efficiency. Compared with DC motors, it does not have the disadvantages of DC motors such as commutators and brushes. Compared with asynchronous motors, it does not require reactive excitation current, so it has high efficiency, high power factor, large moment-to-inertia ratio, reduced stator current and stator resistance loss, measurable rotor parameters, and good control performance; but it has Compared with asynchronous motors, it also has shortcomings such as high cost and difficulty in starting. Compared with ordinary synchronous motor, it eliminates the excitation device, simplifies the structure and improves the efficiency. Permanent magnet synchronous motor vector control system can achieve high precision, high dynamic performance, wide range of speed control or positioning control, so the permanent magnet synchronous motor vector control system has attracted wide attention of scholars at home and abroad!
my country is a country rich in permanent magnet materials, especially the rare earth permanent magnet material NdFeB resources are very rich in my country. The reserves of rare earth minerals are about 4 times that of other countries in the world, known as the "rare earth kingdom". The scientific research level of rare earth permanent magnet materials and rare earth permanent magnet motors has reached the international advanced level. Therefore, for our country, permanent magnet synchronous motor has a good application prospect.
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