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Lightweight high-power permanent magnet brushless DC motor rotor for airborne equipment

A permanent magnet brushless DC and motor rotor technology, which is applied in the direction of electromechanical devices, magnetic circuit rotating parts, electrical components, etc., can solve the problems of late start of research and application, small size and weight, and high technical difficulty. Vibration ability, high efficiency, high reliability, high power density, and good application prospects

Active Publication Date: 2014-10-01
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high coercive force of rare earth permanent magnets, especially the high intrinsic coercive force and high magnetic energy product can make rare earth permanent magnet motors have smaller volume and weight under the same conditions, which is suitable for the technology of high power density motors in the aerospace field demand, the domestic research and application in this field started relatively late, the research and development tasks are tight, the technology is difficult, and foreign countries impose a technical blockade on my country

Method used

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  • Lightweight high-power permanent magnet brushless DC motor rotor for airborne equipment
  • Lightweight high-power permanent magnet brushless DC motor rotor for airborne equipment
  • Lightweight high-power permanent magnet brushless DC motor rotor for airborne equipment

Examples

Experimental program
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specific Embodiment

[0033] Concrete embodiment: [embodiment one] the rotor structure on the 2kW permanent magnet brushless DC motor of aircraft fan:

[0034] The aircraft operates at an altitude of about 10,000, and the external atmospheric pressure is about 1 / 4 of the ground pressure. Fans need to be used to ensure the air pressure in the cabin while maintaining the circulation of the air in the cabin. This project designs a 2kW permanent magnet brushless DC motor as the power source of the environmental control fan.

[0035] Aircraft have strict requirements on volume, weight and reliability. Compared with brushed DC motors, permanent magnet brushless DC motors use electronic commutation instead of mechanical commutation, which solves the problems of brushed DC motors such as commutation sparks, easy wear of commutator segments, and maintenance of commutator segments; The magnetic brushless DC motor is excited by rare earth permanent magnets. Compared with asynchronous motors, it has the chara...

Embodiment 2

[0041] [Example 2] The 18kW permanent magnet brushless DC motor project is now combined with the aircraft fan:

[0042] Such as image 3 Shown is the appearance and size of the rotor of the permanent magnet brushless DC motor, including 1. the magnetic steel of the permanent magnet; 2. the rotor core; 3. the rotating shaft; 4. the first slot.

[0043] Such as image 3 Shown is the appearance and size of the rotor of the permanent magnet brushless DC motor. The rotor magnetic pole is surface-mounted tile type, and six permanent magnets are evenly distributed to form a six-pole motor. This rotor magnetic circuit structure is relatively simple, easy to process and manufacture, and easy to achieve optimal design. It is suitable for permanent magnet brushless DC The motor and the rotor tighten the ring to prevent the magnetic steel from being thrown out at high speed. The rotor core 2 is made of laminated cold-rolled silicon steel sheets, and the weight reduction is optimized wh...

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Abstract

The invention relates to a lightweight high-power permanent magnet brushless DC motor rotor for airborne equipment. The permanent magnet brushless DC motor rotor is characterized in that a rotating shaft is a solid shaft, thermal interference fit is adopted for the circumference where the rotating shaft is connected with a rotor iron core in an end-to-end mode, and the circumference located on one side of the rotor iron core is provided with a plurality of semicircular air grooves; a plurality of circular first hole grooves are evenly formed in the central circumference of the outer diameter and the inner diameter of a rotor yoke part, the number of the first hole grooves is equal to that of permanent magnet magnetic steel, and the circle center of each first hole groove is located on the central axis of the corresponding magnetic steel. As the permanent magnet brushless DC motor rotor is quite beneficial to weight reduction for aircraft power plants such as an airplane and a guided missile, the application prospects of the permanent magnet brushless DC motor rotor in the aerospace field are excellent, and the weight reduction of the optimized scheme can reach 40 percent compared with an original scheme.

Description

technical field [0001] The invention belongs to the technical field of motors, and designs a lightweight high-power permanent-magnet brushless DC motor, in particular to a lightweight high-power permanent-magnet brushless DC motor rotor for aviation airborne equipment. Background technique [0002] In recent years, rare earth permanent magnet motors and their control technology have been successfully extended to the aerospace field. Aerospace airborne equipment has strict requirements on volume, weight, and reliability. Small volume, light weight, and large output per unit volume are the basic requirements for various types of motors in the aerospace field. The high coercive force of rare earth permanent magnets, especially the high intrinsic coercive force and high magnetic energy product can make rare earth permanent magnet motors have smaller volume and weight under the same conditions, which is suitable for the technology of high power density motors in the aerospace fie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K29/00H02K1/27
Inventor 贺梦颖窦满峰李全武庞基
Owner NORTHWESTERN POLYTECHNICAL UNIV
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