Motor stator and engine base positioning structure and fault diagnosis method thereof

Abstract

The invention discloses a motor stator and engine base positioning structure and a fault diagnosis method thereof. The motor stator and engine base positioning structure comprises a rotor, a stator punching plates and an engine base; positioning protrusions are arranged on the outer circumference of the stator punching plates and are used for positioning; positioning grooves arranged in the engine base are capable of being mutually matched with the positioning protrusions, and circumferential positioning with the stator is achieved; the shape of the positioning protrusions and the positioning grooves is one of semicircular shape, trapezoid shape and rectangular shape. A protrusion structure is arranged on the outer circumference of the stator punching plates, the stator punching plates are pressed in an overlaying manner to form the stator with the positioning protrusions, the stator is matched with the positioning grooves in the inner wall of the engine base, and circumferential positioning of the stator is achieved; noise reduction signals are decomposed by adopting an EMD decomposition method, the neighboring signals are combined by adopting a CMF method, and the vibrating signals which are more smooth, stable and complete can be acquired; motor fault diagnosis is performed through a wavelet packet decomposition and BP neural network method, motor fault can be detected timely and accurately, and loss brought by the motor fault is prevented.

Description

technical field [0001] The invention relates to a positioning structure of a motor stator and a frame and a fault diagnosis method thereof, belonging to the field of motor manufacturing. Background technique [0002] With the advancement of modern science and technology and the continuous development of social economy, motors are playing an increasingly important role in production and daily life. It is the most widely used driving machine in modern social production. With the development of computer and electronic technology, production equipment is constantly developing towards large-scale, high-speed, continuous and automatic. Therefore, there is a large demand for electrical equipment and high quality requirements. [0003] In the existing motor, in order to reduce the weight of the electric vehicle, the driving motor is made of an aluminum alloy casing. Since the expansion coefficient of aluminum is greater than that of iron, the temperature of the motor often increases...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing methods use top screw holes on the machine base and positioning through the top screws. This method not only increases the parts and processing, assembly procedures and difficulty, wastes time, but also increases production costs. After a long period of use, it is easy to appear that the top wire is loose, but it still cannot fundamentally solve the problem

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