Multi-polar permanent-magnet motor pole core structure

Abstract

The invention provides a multi-polar permanent-magnet motor pole core structure, which mainly comprises a pole core and magnet steel, wherein the pole core is uniformly distributed with magnet steel grooves whose number is the same as that of motor pole pairs; each magnet steel groove accommodates magnet steel with the same N pole or the same S pole; the pole core is made of a good magnetic material; a pole with the opposite polarity to the magnet steel is formed between each two pieces of magnet steel, and the pole is the S pole or the N pole; and finally magnetic poles with the N poles and the S poles alternate uniformly are formed in the surface of the motor rotor. Compared with the existing product, half magnet steel grooves in the pole core can be reduced, and thus processing of a multi-polar motor or a super multi-polar motor is facilitated. When the permanent-magnet motor manufactured in the invention is used, a multi-polar structure can be realized easily, the structure of the invention can be widely applied to the new-energy industry, system configuration of the existing new-energy industry is changed, and development of the new-energy industry is promoted.

Description

Technical field [0001] The invention relates to a permanent magnet motor rotor structure, in particular to a multi-pole permanent magnet motor magnetic pole core structure, which belongs to the technical field of permanent magnet motors. Background technique [0002] There are two power grid frequency systems in the world, namely 50Hz frequency and 60Hz frequency system. Both generators and electrical equipment must meet the above two frequency requirements. According to the motor speed formula n=60f / p, it can be seen that the speed n of the generator is determined by the grid frequency f and the number of motor pole pairs p. Since the grid frequency is a constant value, the number of motor pole pairs is limited by the volume of the motor, and the number of motor poles cannot be set Too many, therefore, traditional motors usually run at a high speed of 750 to 3000 revolutions per minute. [0003] With the depletion of petrochemical energy and the pressure of environmental p...

AI Technical Summary

Problems solved by technology

For example, when the generator speed is 20 revolutions per minute, to generate 50HZ electric energy, the number of poles of the generator must be 300 poles. It is very difficult to distribute such a large number of permanent magnet poles on the motor rotor with a small diameter. The existing permanent magnet The rotor structure of the motor is almost difficult to realize

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