Low-speed big-diameter high-torque asynchronous motor

Abstract

The invention discloses a low-speed large-diameter high-torque asynchronous motor, which comprises the following parts: frame, stator iron core, stator assembly of stator winding and rotor assembly with shaft, rotor iron core, wherein the rotor rack is fixed on the shaft, which adopts sector lamination; the entire circle is fixed on the rotor rack, which is composed of copper conductive bar, two ends of copper conductive bar and copper end ring welded by copper conductive bar; the flute is opened on one side of sector lamination and the other side contains projected gear; the projected gear on the butt side of sector locks flute mutually; the motor is fit for electric driving driller, hinger domains or other similar operating working conditions.

Description

technical field [0001] The invention relates to a motor, in particular to a low-speed, large-diameter and high-torque asynchronous motor. Background technique [0002] In some specific application fields, such as electric drive drilling rigs, AC variable frequency winches, etc., the load needs to be driven at low speed and high torque. The prior art adopts the motor to drive the load after being decelerated by a gear reducer (box). However, the gear reducer needs to occupy a certain space, which is not conducive to the overall layout of related equipment. At the same time, the mechanical transmission efficiency of the gear reducer is also low. Using low-speed, large-diameter, high-torque asynchronous motors to directly drive corresponding loads is an inevitable choice for technological development. At present, there are almost no literature reports on the structure of direct-driven low-speed, large-diameter, and high-torque asynchronous motors. However, there are many def...

AI Technical Summary

Problems solved by technology

However, during operation, due to the influence of magnetic flux, the pulling screw will generate heat, and at the same time, due to the weight of the punch itself and the impact of vibration, the stator core is prone to tabs, that is, some fan-shaped punches protrude from the core, and in severe cases, it will be scratched Stator winding insulation, causing motor grounding or short-turn faults

Or due to the magnetic flux, the weight of the punch itself and the influence of vibration, the pulling screw will have deflection, resulting in deformation of the iron core. Generally, a fixing plate is welded or installed in the middle of the pulling screw to solve the deformation problem, but the process is complicated and the reliability requirements are high.

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