Radially-magnetized double-ring magnetic steel permanent magnet motor

Abstract

The invention relates to a radially-magnetized double-ring magnetic steel permanent magnet motor, and the motor comprises a rotor, stators, thrust plates, nuts and a shaft. The rotor consists of a rotor ring, an external magnetic steel ring, an internal magnetic steel ring and a bearing ring. The internal surface of the external magnetic steel ring is a work surface, and the external surface of the internal magnetic steel ring is a work surface. The external and internal magnetic steel rings are installed on the rotor ring, and the rotor ring is installed on an outer ring of the bearing ring to form a rotor. The shaft is installed in a bearing hole of a rotor bearing ring, and the two thrust plates are installed at the left and right sides of the rotor bearing ring. The two stators are installed at two ends of the rotor, and are fixed on the shaft through the nuts. Moreover, the two stators are connected in series. The motor provided by the invention achieves the application of the radially-magnetized double-ring magnetic steel structure in a universal-type hydrodynamic gas-lubricated bearing three-phase permanent magnet motor, improves the efficiency, reduces the generated heat ofa winding, reduces the temperature gradient and mass center drift of a gyroscope, improves the instrument precision, is advanced in technology, and fills a gap of China in the technology.

Description

technical field [0001] The invention relates to the technical field of permanent magnet motors, in particular to a radially magnetized double-ring magnet steel permanent magnet motor. Background technique [0002] In general, permanent magnet motors use radially magnetized single-ring magnets to establish a permanent magnetic field. In order to reduce the power loss of the motor, they are often designed as a Dasonval structure, and the stator core structure is canceled to eliminate the loss of the stator core. , but this structure makes the working air gap of the motor very large. It is necessary to use high-performance magnetic steel or increase the size of the magnetic steel to establish the air gap magnetic field required for the operation of the motor. Therefore, the requirements for the magnetic properties of the magnetic steel are high, the demand is large, the product qualification rate is low, and the manufacturing cost is high. At the same time, the motor has a larg...

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Problems solved by technology

Therefore, the requirements for the magnetic properties of the magnetic steel are high, the demand is large, the product qualification rate is low, and the manufacturing cost is high. At the same time, the working current of the motor is large, the winding heat is high, and the efficiency is low.

In addition, the magnetic flux leakage of the above structure in the axial direction is relatively large

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