Direct-driven permanent-magnet motor

Abstract

The invention discloses a direct-driven permanent-magnet motor. The direct-driven permanent-magnet motor comprises a stator and a rotor, wherein the stator comprises a water jacket engine base and a stator iron core, the stator iron core is fixed on the water jacket engine base, a plurality of annular opening grooves are formed in a surface of the stator iron core according to a rule, stator windings are arranged in the opening grooves, the rotor comprises a rotor body with a support and a rotor fan, the rotor body comprises a rotation shaft and a rotor iron core, the rotor iron core is arranged on the rotation shaft and is formed by laminating a plurality of fan-shaped rotor punching sheets in a staggered way, a plurality tapered grooves are formed in the outer circumference of each fan-shaped rotor punching sheet, and T-shaped magnetic steel with a tapered cross section is arranged in each tapered groove. In the direct-driven permanent-magnet motor, the stator windings uniformly generate heat, the magnetic steel is simple and reliable in fixing, a glass fiber or a jacket sleeve is not needed to be bonded, the rotor body and the magnetic steel are low in heat generation, and the reliability and the safety of the magnetic steel are improved; and meanwhile, the motor process is further simplified, the motor cost is reduced, and the market competiveness of a product is improved.

Description

technical field [0001] The invention belongs to the technical field of motor manufacturing, in particular to a radial surface-mounted inner rotor direct-drive permanent magnet motor, which is mainly used in mine conveying machinery. Background technique [0002] Mining machinery such as scraper conveyors, belt conveyors, elevators, ball mills, etc. are all low-speed high-torque transmission systems. At present, the system is generally composed of high-power asynchronous motors, reducers and hydraulic couplings. Due to the existence of reducers and hydraulic couplings and the phenomenon of large horses and small carts often appearing in the driving motor, the transmission system has disadvantages such as low efficiency, high power consumption, unstable starting, difficult starting with heavy loads, and heavy maintenance workload. cumbersome. In addition, the use of a multi-stage transmission system results in a large weight of the entire system and low torque and power densi...

AI Technical Summary

Problems solved by technology

The application of low-power and low-dissipation windings is more common. Generally, a view is that the rotor and stator of permanent magnet synchronous motors rotate synchronously, and the loss in the rotor is often ignored, especially the loss of the rotor magnet. However, in the large-torque forming winding, the actual The situation is due to the cogging effect of the concentrated fractional slot, the mutual influence of the winding harmonic magnetic potential and the harmonic current, especially the low-order harmonic influence will cause eddy current loss on the rotor, and there are upper and lower layers and left and right layers of the winding in the stator slot The phenomenon of uneven loss, although the eddy current loss of the rotor is smaller than the copper loss and iron loss, but if no measures are taken, even such a small loss may cause a high temperature rise, which will cause local demagnetization of the permanent magnet, and reduce the performance of the motor. damage, and the uneven loss of conductors in the stator slot will also lead to serious local heating

[0008] At the same time, the fixing method of the radial surface-mounted inner rotor magnet, whether it is as mentioned in the above patent, uses fixing screws, anaerobic adhesive, insulating layer, high-density glass fiber cloth and epoxy resin adhesive layer to surround and seal the entire outer surface of the rotor. The composite fixing method is still the jacket sleeve method. The former is not conducive to the heat dissipation of the rotor, and the latter generates heat itself, which increases the heat dissipation burden of the rotor. There are certain problems.

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