Cooling structure for permanent magnet motor

Abstract

The invention discloses a cooling structure for a permanent magnet motor. The invention relates to the technical field of permanent-magnet motor cooling. The cooling structure comprises a shell, bearings are arranged in the inner walls of the two sides of the shell, and an output shaft transversely penetrates through the interiors of the bearings. A fixing frame is installed on one side of the shell, and a filtering sponge net is fixed to one side of the fixing frame. The output shaft penetrates through the interior of the fixing frame, and fan blades are inlaid in the outer wall of one end ofthe output shaft. An air inlet pipe is connected to one side of the upper end of the output shaft, and the air inlet pipe is located in the fixing frame. In the present invention, when the output shaft drives the fan blades to rotate, certain wind can be generated, the wind enters the output shaft from the air inlet pipe and then is exhausted from an air outlet hole in the other side, so that airin the output shaft flows, a rotor and permanent magnets can be cooled from the right middle part, the conventional mode of only cooling from a gap between the rotor and the stator is replaced, the cooling speed of the rotor and the permanent magnets is increased, and the cooling effect is improved.

Description

technical field [0001] The invention relates to the technical field of cooling of permanent magnet motors, in particular to a cooling structure for permanent magnet motors. Background technique [0002] Like DC motors, induction motors, etc., permanent magnet motors are also composed of three parts: stator, rotor and auxiliary devices. There are three-phase AC windings on the stator and excitation windings on the rotor. After the DC current is applied, it can generate a magnetic field. During the working process of the magneto, it is necessary to adopt forced heat dissipation measures to take away the heat inside the permanent magnet synchronous motor, so as to avoid the demagnetization phenomenon caused by the permanent magnet inside the rotor due to long-term high temperature working environment, so it is necessary to provide a cooling mechanism in the permanent magnet motor . [0003] Part of the existing cooling structure for permanent magnet motors is provided with two...

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Problems solved by technology

[0003] Part of the existing cooling structure for permanent magnet motors is provided with two holes on the stator, one hole inputs the cooling medium, and the other hole outputs the cooling medium, so that the permanent magnets in the rotor are cooled by heat exchange. It is cumbersome to install before use and requires extra energy, and the other part is to install a fan on the inner and rear side of the motor, but the bearing housing covers the rotor and stator, so that the fan can only dissipate heat from the outer wall, so that the cooling effect cannot be improved

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