Spliced block type tangential magnetizing brushless motor rotor structure with built-in magnetic steel and method

Abstract

The invention provides a spliced block type tangential magnetizing brushless motor rotor structure with built-in magnetic steel. The spliced block type tangential magnetizing brushless motor rotor structure with the built-in magnetic steel comprises rotor sheet assemblies, a supporting frame 2, the magnetic steel 3, rivets 4, partition plates 5 and a rotating shaft 6. The rotor sheet assemblies are mutually independent, and the magnetic steel 3 conducts tangential magnetizing inside the brushless motor rotor structure. The rotor sheet assemblies are mainly formed by interspersing and stacking a plurality of rotor sheets 1 through the rivets 4, the rotor sheets 1 are arranged on the supporting frame 2 in a spliced mode under the effect of the rivets 4, and flanges are arranged on the rotor sheets 1. The partition plates 5 are arranged on the two sides of the magnetic steel 3 respectively, and the rotating shaft 6 is arranged in a center hole of the supporting frame 2. The invention further provides a corresponding assembly method and a corresponding motor. Rotor leakage can be effectively reduced, the performance of the motor is improved, and the parts are firmly matched, so that the magnetic steel cannot be thrown away; the magnetic steel is not over against air gaps, demagnetization resistance is effectively improved, a traditional narrow side magnetism separation bridge is omitted, and manufacturability of the motor is obviously improved.

Description

technical field [0001] The invention relates to a motor rotor structure, in particular to a permanent magnet brushless built-in magnetic steel tangentially magnetized motor rotor structure. Background technique [0002] The traditional brushless motor rotor structure adopts surface-mounted magnetic steel or built-in radial magnetization structure. In practical applications, under the limited motor volume, it is necessary to increase the rated output power of the motor. The radial magnetization structure is limited by the volume. However, tangential magnetization can realize the parallel connection of two magnetic steels to provide magnetic flux, which significantly improves the air gap flux and increases the rated output power of the motor, but the size of the magnetic isolation bridge of tangential magnetization is relatively small. Narrow, difficult to process, expensive to produce, and the existence of the magnetic isolation bridge will lead to magnetic flux leakage, whic...

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Problems solved by technology

[0002] The traditional brushless motor rotor structure adopts surface-mounted magnetic steel or built-in radial magnetization structure. In practical applications, under the limited motor volume, it is necessary to increase the rated output power of the motor. The radial magnetization structure is limited by the volume. However, tangential magnetization can realize the parallel connection of two magnetic steels to provide magnetic flux, which significantly improves the air gap flux and increases the rated output power of the motor, but the size of the magnetic isolation bridge of tangential magnetization is relatively small. Narrow, not easy to process, more expensive to produce, and the existence of the magnetic isolation bridge will lead to magnetic flux leakage, which will reduce the performance of the motor

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