Protective box type amorphous, microcrystal or nano-crystal alloy stator core for motor and preparation method thereof

Abstract

The invention belongs to the field of magnetic circuit parts of motors, and discloses a protective box type amorphous, microcrystal or nano-crystal alloy stator core for a motor and a preparation method thereof. The method comprises the following steps of: stamping a coiled alloy strip (3) to form a plurality of same annular stamped sheets, wherein the tooth ends of inner teeth (1) of the stampedsheets are positioned on the same circumference and the outer side of each stamped sheet is provided with at least one positioning groove (2); stacking the plurality of annular stamped sheets in a protective box with open upper end, putting the stamped sheets and the protective box into insulated coating solution together and performing insulated dip-coating treatment; taking out the stamped sheets and the protective box together, performing compactness treatment on the annular stamped sheets, fixing an upper end panel of the protective box and the inner center surface together, and forming the stator core; and performing integral annealing treatment on the stator core of the sealed protective box. By the method, the process problems that the stator core is easily damaged to drop residue and cracks among layers, the performance declines because the adhesive stress cannot be eliminated and the like are solved, and the performance of the stator core is greatly improved.

Description

technical field [0001] The invention belongs to the field of magnetic circuit components of motors, and in particular relates to a box-protected amorphous, microcrystalline or nanocrystalline alloy stator core for motors and a preparation method thereof. The stator core is especially suitable for high-frequency motors. Background technique [0002] With the advancement of science and technology, motors driven by 50Hz industrial frequency power supply can no longer meet people's needs in many application fields. In order to achieve high rotational speed, high power density or high torque density of the motor, it is often necessary to design the working frequency of the motor at 400-1000 Hz, or even higher. Today's three-phase synchronous or asynchronous motors equipped with three-phase AC variable frequency (VVVF) speed control systems are replacing traditional DC series excitation traction motors with mechanical commutators, and are used in electric vehicles, rail electric v...

AI Technical Summary

Problems solved by technology

Dip varnish curing will introduce a lot of bonding stress in the amorphous alloy core, and the soft magnetic properties of the amorphous alloy material are very sensitive to stress, which will inevitably lead to the saturation magnetic flux density and permeability of the amorphous stator core. Performances such as core loss and core loss are significantly lower than those of amorphous alloy materials

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