Modeling method of motor in electromagnetic field-flow field-temperature field coupling calculation

Abstract

The invention relates to a modeling method of a motor in electromagnetic field-flow field-temperature field coupling calculation. The method comprises the following steps that (1) a finite element calculation model of the motor is established, and an electromagnetic field value is calculated; a rotor calculation domain is set into a multi-component fluid calculation domain, and a model calculation domain of air, a rotor conductor and a rotor iron core is established; (3) the value is calculated in the corresponding model calculation domain, and the velocity of movement is worked out; (4) a result which is worked out from the calculation of the electromagnetic field value and the calculation domain of each part of the multi-component fluid serves as load and is loaded into a temperature field to solve and calculate, and a temperature result is worked out. The method is adopted to set the rotor calculation domain into multi-component fluid; in such a manner, after a rotor part which is originally slid is equivalent into liquid, the rotor part can be processed and solved quickly and conveniently through a fluid control equation, so that not only is the heat loss of all parts in the motor calculated comprehensively and precisely, but also the calculation time and calculation complexity can be greatly reduced.

Description

technical field [0001] The invention belongs to a modeling method, in particular to a modeling method of a motor in electromagnetic field-flow field-temperature field coupling calculation. Background technique [0002] The motor will generate losses during operation, and these losses will be converted into heat energy to increase the temperature of each part. For a long time, the operating temperature rise of the motor has been an important indicator to measure the operating state, and it occupies an important position in the research of the comprehensive performance of the motor. [0003] However, in the numerical calculation of electromagnetic field-flow field-temperature field coupling of a motor with moving parts such as a rotor, due to the no-slip boundary condition in fluid mechanics theory, that is, the velocity of the fluid at the fluid-solid interface is 0, when When there is a moving solid in the fluid calculation domain (there is both an air part and a rotor part ...

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention is to provide a motor modeling method in the coupling calculation of electromagnetic field-flow field-temperature field, which can solve the problem that the rotating speed load cannot be directly applied to the motor. At the interface between the rotor and the air gap, it is difficult to calculate the temperature value of the rotor part, which makes it difficult to quickly and accurately obtain the temperature rise data in the motor