Motor Temperature Calculation System Using Thermal Equivalent Circuit

Abstract

The present application relates to a temperature calculation system of a motor using a thermal equivalent circuit, which includes: a yoke, a first tooth and a second tooth, and a coil member, the yoke is arranged along the inner circumferential surface, the first tooth part and the second tooth part are arranged on the inner peripheral surface of the yoke part while having an interval set in the circumferential direction, the coil member is formed between the first tooth part and the second tooth part and includes a plurality of coils, the system Form the thermal equivalent circuit of the coil member and calculate the temperature of the set portion of the coil member, wherein, by using the radial conduction resistance and the temperature T of the inner side of the coil member c To calculate the outer peripheral surface temperature and the inner peripheral surface temperature of the coil member, the average temperature, and the temperature of the end surface is calculated by using the axial conduction resistance and the average temperature.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit to Korean Patent Application No. 10-2016-0168905 filed in the Korean Intellectual Property Office on December 12, 2016, which is hereby incorporated by reference in its entirety. technical field [0003] The invention relates to a temperature calculation system of a motor using a thermal equivalent circuit. Background technique [0004] In electronic devices, an interior permanent magnet synchronous motor (IPMSM) will be described as an example and will be referred to as a motor. [0005] Since the IPMSM has both the magnetic torque component caused by the permanent magnet and the armature current and the reluctance torque component caused by the d-q axis inductance difference, it can obtain high torque per unit volume. [0006] However, depending on the driving characteristics of IPMSM, excessive iron loss occurs in the high-speed region, and copper loss occurs because a l...

AI Technical Summary

Problems solved by technology

[0010] However, thermal analysis using finite element method and finite difference method can take a long time to partition elements and calculate matrices to analyze complex regions

[0011] That is, there is a problem that it is difficult to apply to the entire shape area of ​​the motor

Images