Dust environment-oriented permanent magnet motor protection and heat dissipation parameter calculation method and system

By collaboratively determining the structural parameters for protection and heat dissipation in dusty environments, the contradiction between protection and heat dissipation performance of permanent magnet motors in dusty environments is resolved, improving the motor's operational reliability and heat dissipation performance. This method is applicable to permanent magnet motors with different structures and power levels.

CN121663877AActive Publication Date: 2026-03-13NORTHWESTERN POLYTECHNICAL UNIV
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Patent Information

Application Number
CN202610178558.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-09
Publication Date
2026-03-13
Estimated Expiration
2046-02-09

AI Technical Summary

Technical Problem

In dusty environments, there is a mutually restrictive relationship between the protective structure and heat dissipation performance of permanent magnet motors. Existing technologies make it difficult to effectively assess the impact of changes in protective structure parameters on heat dissipation performance during the design phase, resulting in a difficulty in balancing the reliability and heat dissipation performance of the motor in dusty environments.

Method used

By acquiring the dust mass concentration, particle size characteristics, and ventilation parameters in the motor operating environment, the dust intrusion amount and deposition mass are calculated. The influence of dust deposition on the equivalent thermal resistance and temperature rise of the motor is introduced, and the parameters of the protective structure and heat dissipation structure are determined collaboratively to establish a unified optimization method for protection and heat dissipation performance.

Benefits of technology

It achieves the simultaneous fulfillment of protection and heat dissipation requirements in dusty environments, improves the reliability and environmental adaptability of motor operation, reduces the risk of heat dissipation performance degradation, and has good engineering feasibility and versatility.

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Abstract

The invention discloses a dust environment-oriented permanent magnet motor protection and heat dissipation parameter calculation method and system. The method comprises the following steps of obtaining dust mass concentration and dust particle size range in a permanent magnet motor operation environment, operation time and rotation speed of a permanent magnet motor and ventilation flow corresponding to a ventilation structure; calculating the minimum heat dissipation area of the permanent magnet motor based on the acquired data and a preset maximum temperature rise threshold value of the motor; based on the dust mass concentration, the operation time of the permanent magnet motor and a preset maximum dust intrusion threshold value, corresponding protection parameters of the permanent magnet motor are calculated; wherein the protection parameters comprise the sealing gap size and the protection grade of the protection structure. According to the method, the dust environment parameters and the motor operation parameters are obtained, and the protection structure parameters and the heat dissipation structure parameters are cooperatively determined under the dual conditions of the protection constraint and the temperature rise constraint, so that unified optimization of the protection performance and the heat dissipation performance of the permanent magnet motor in the dust environment is realized.
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