Closed permanent magnet synchronous motor

Abstract

The invention provides a safe and reliable closed permanent magnet synchronous motor with good radiation effect to solve the problem of difficult radiation of the closed permanent magnet synchronous motor used in the field of coal mine transportation and the like. In the motor, a frame is of a closed structure; the outer surface of the frame is provided with a water cooling structure; through blades arranged on the end surface of an end ring, air can enter a first ventilating hole of a rotor to cool the rotor through a first ventilating channel of the inner surface of the frame, a plurality of second ventilating channels arranged in the middle of a winding and a second ventilating hole in the middle of the rotor. The motor can reduce the axial length of the motor as much as possible undera condition that the heat radiation requirement of the rotor and the winding of the motor is met, thus ensuring that the motor can be used in places with narrow space, such as a coal conveying tunnel. The closed permanent magnet synchronous motor has excellent cooling effect, and can completely meet the requirement of long-term operation and free maintenance.

Description

technical field [0001] The invention relates to the technical field of electric motors, and more specifically relates to a sealed permanent magnet synchronous motor, especially a closed permanent magnet synchronous motor with low speed and high torque and explosion-proof requirements. Background technique [0002] In the field of coal mine transportation, due to the work needs and the requirements of the working environment, the motors driving the transportation equipment need to have low speed, high torque and explosion-proof functions. In this way, the permanent magnet synchronous motors with low speed and high torque are usually used to directly drive the transportation machinery and equipment. . Such permanent magnet synchronous motors usually have a speed of 150-300r / min. Due to the limited width of the coal tunnel, the installation size of the motor is strictly limited, especially in the axial direction of the motor, so the length of the iron core needs to be shortened...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of difficult heat dissipation of the sealed permanent magnet synchronous motor used in coal mine transportation and other fields, and to provide a safe and reliable sealed permanent magnet synchronous motor with good heat dissipation effect, so that the permanent magnet synchronous motor Can meet the requirements of long-term operation and maintenance-free

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