Novel gyro motor

Abstract

The invention belongs to the technology of aircraft instruments and relates to the improvement on performances of a gyro motor. The novel gyro motor comprises a rotor iron core and a mouse cage embedded into the rotor iron core. The novel gyro motor is mainly improved in that: firstly, the rotor iron core is made from an integral soft magnetic material, a slot opening part of a slot for embedding a mouse case guide bar is narrow, and the inner part of the slot for embedding the mouse case guide bar is wide and deep; secondly, the mouse case is made from pure copper, and the guide bar of the mouse cage is relatively narrow, the relatively narrow iron core slot opening can enter a relative wide and big slot, and the length of the mouse case guide bar is greater than the length of the iron core; thirdly, a ring-shaped slot for accommodating part of the mouse case end ring is formed in the part, corresponding to the mouse cage end ring, of the rotor iron core. According to the novel gyro motor disclosed by the invention, the slender guide bar enters the relatively wide and big slot from the narrow slot opening, and a technology of compression-shortening and thickening is adopted, so that a too great gap coefficient K sigma and rotor resistance R2 are remarkably improve. Moreover, the magnetizing current is reduced, the power factors are improved, and the rotor resistance is lowered. And therefore, the motor efficiency is improved, the operation current is lowered and radiation is reduced.

Description

technical field [0001] The invention belongs to aviation gyro instrument technology and relates to the improvement of the performance of gyro motors. Background technique [0002] Small gyro motors are mostly asynchronous AC motors with small size and high speed. The small size of the motor results in low efficiency and serious heat generation. Small volume and small heat capacity lead to high heat load density and high temperature rise. High temperature is the root cause of many failures, among which high temperature can deteriorate lubrication and cause failure, cause bearing damage, and cause motor to seize. The high-temperature thermal stress changes the dynamic balance, loosens the structure, and causes failures. In short, high temperature is the source of all evils that cause failures in all instruments. Before the present invention, it was a design imitating the Russian МГТУ-05 (such as Figure 1-2 and 5-6), the motor rotor adopts pure copper expansion squirrel ca...

AI Technical Summary

Problems solved by technology

[0003] According to many sources, at present, for gyro motor rotors that use expanded embedded squirrel cages and chemically deposited squirrel cages at home and abroad, the contradiction between the magnetic permeability area and the conductive cross-section, the result of the compromise is still the air gap coefficient K δ too large and the rotor resistance R 2 If they are too large, the efficiency of the gyro motor will be low, the heat will be large, the failure will be more, and the reliability will be low.

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