An Equivalent Method of Stator Winding in Temperature Field Analysis of Flat Wire Motor

Abstract

The invention discloses an equivalent method for stator windings in temperature field analysis of a flat wire motor, including a stator winding modeling method and a stator winding equivalent thermal conductivity calculation method; the stator winding modeling method includes stator flat wire modeling The method and the stator insulation modeling method; the calculation method of the equivalent thermal conductivity of the stator winding includes the calculation method of the stator flat wire thermal conductivity, the stator coil insulation thermal conductivity and the calculation method of the equivalent insulation thickness. The method of the invention enhances the accuracy of the analysis results of the stator temperature field of the flat wire motor.

Description

technical field [0001] The invention belongs to the technical field of motor temperature field simulation, and in particular relates to a stator winding equivalent method in the temperature field analysis of a flat wire motor. Background technique [0002] The motor is an important bridge that converts electrical energy from the original energy form, and is a device that converts most of the electrical energy into mechanical energy. With the improvement of the motor design level and the development of the motor manufacturing industry, the cooling methods, materials and processes of the motor have been greatly improved. The loss per unit volume of the motor is constantly increasing, which makes the motor seriously heated. Excessive temperature rise will reduce the insulation life and even destroy the insulation, affecting the output torque capability of the motor. For permanent magnet motors, it will cause irreversible demagnetization of the permanent magnets, directly threat...

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Problems solved by technology

[0004] In the current analysis of the temperature field of the flat wire motor, there are many processing methods for the treatment of the stator winding. The relatively simple processing method is to concentrate each layer of flat wire into a single copper conductor, straighten the end winding, etc. The advantage of this method is that the model is relatively simple and the calculation speed is fast, but the calculation accuracy is not high, especially the distortion of the end winding is large, and it is difficult to simulate the highest temperature rise point of the end winding; The flat wire model and insulation model of the inner and the end, because the insulation size of the end winding is extremely small, most of which are on the order of millimeters, and the shape of the end winding is complex, the grid division and calculation workload are huge, so it is more important in the electrical engineering design. use less

[0005] At present, the problems existing in the analysis of the temperature field of flat wire motors are: when analyzing the temperature field of the stator, there is a lack of a stator winding that can not only meet the requirements of engineering design, but also greatly reduce the demand for computing power and computing resources. Equivalent method

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