Unlock instant, AI-driven research and patent intelligence for your innovation.

Automatic inner-cooling rotor of high speed permanent magnet synchronous motor

A permanent magnet synchronous motor and rotor technology, applied in synchronous machine parts, magnetic circuit rotating parts, magnetic circuit shape/style/structure, etc., can solve problems such as low reliability and poor rotor cooling performance, and achieve extended motor Long life, lower rotor temperature, good cooling effect

Inactive Publication Date: 2010-07-14
HARBIN INST OF TECH
View PDF4 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of poor rotor cooling performance and low reliability in existing high-speed permanent magnet synchronous motors, the present invention proposes a self-internal cooling rotor of high-speed permanent magnet synchronous motors

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Automatic inner-cooling rotor of high speed permanent magnet synchronous motor
  • Automatic inner-cooling rotor of high speed permanent magnet synchronous motor
  • Automatic inner-cooling rotor of high speed permanent magnet synchronous motor

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Embodiment 1: The self-internal cooling rotor of the high-speed permanent magnet synchronous motor described in this embodiment is composed of a permanent magnet 2, a rotating shaft 1 and a permanent magnet sheath 3. The rotating shaft 1 is divided into shaft ends 1-1, The shaft shoulder 1-2 and the shaft body 1-3 are three parts, the shaft body 1-3 is located in the middle of the shaft, and the two ends of the shaft body 1-3 are respectively provided with two shaft shoulders 1-2, and the two shaft shoulders The two sides of 1-2 are two shaft ends 1-1; the diameter of the shaft shoulder 1-2 is greater than the diameter of the shaft end 1-1, and the diameter of the shaft shoulder 1-2 is greater than the diameter of the shaft body 1-3; the self The number of poles of the inner cooling rotor is 2P, the permanent magnet 2 is fixed on the outer surface of the shaft body 1-3, the pole arc coefficient of the main magnetic pole formed by the permanent magnet 2 is less than 82%, ...

specific Embodiment approach 2

[0013] Embodiment 2: The difference between this embodiment and the self-cooling rotor of the high-speed permanent magnet synchronous motor described in Embodiment 1 is that the shoulder ventilation holes 5 are axial ventilation holes.

[0014] see Figure 1-Figure 5 It is a structural schematic diagram of the rotor in this embodiment when the number of poles of the rotor is 2. in, figure 1 It is a structural schematic diagram when the permanent magnet sheath 3 is located outside the permanent magnet 2, figure 2 yes figure 1 right view of . image 3 It is a structural schematic diagram when the permanent magnet sheath 3 is located outside the permanent magnet 2 and the shoulder 1-2, Figure 4 yes image 3 right elevation. Figure 5 yes image 3 A-A cutaway view.

specific Embodiment approach 3

[0015] Embodiment 3: The difference between this embodiment and the self-cooling rotor of the high-speed permanent magnet synchronous motor described in Embodiment 1 is that one end of the shoulder ventilation hole 5 is located on the circumferential surface of the shaft shoulder, and The rotor communicates with the outside; one end of the shaft shoulder ventilation hole 5 is located on the inner surface of the shaft shoulder and communicates with the axial ventilation channel 4 .

[0016] see Figure 8-Figure 10 with Figure 12 is a schematic diagram of the rotor structure in this embodiment when the number of poles of the rotor is 2. Figure 8 It is the situation when 3 permanent magnet sheaths are set on the outside of the permanent magnet 2. The shoulder ventilation hole 5 in this figure is L-shaped. Figure 9 yes Figure 8 The D-D cross-sectional view, from Figure 9 It can be seen that the port where the shaft shoulder ventilation hole 5 communicates with the axial v...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses an automatic inner-cooling rotor of a high speed permanent magnet synchronous motor, relating to the technical field motors. The invention solves the problems of poor cooling performance, low reliability and the like of a rotor in a traditional high-speed permanent magnet synchronous motor. In the invention, the number of poles is 2P, a rotary shaft is axially divided into a shaft end, a shaft shoulder and a shaft body along the axial direction, the permanent magnet is fixed on the shaft body, a pole arc coefficient of a main pole formed by the permanent magnet is less than 82%, an axial wind channel is formed between the sides of the permanent magnet of two adjacent poles, the external surfaces of the shaft body between the two sides, and the internal surface of a protective sleeve 3 of the permanent magnet, each shaft shoulder is provided with 2P axial air holes communicated with the wind channel, the inclined directions of the axial air holes on the shaft shoulders at two sides are different, the direction of one side is against the rotation direction of the rotor, a wind shielding surface is formed by processing the external side of the air holes of the shaft shoulder; the direction of the other side is along the rotation direction of the rotor, and a downwind surface is formed by processing the external side of the air holes of the shaft shoulder. The rotor has simple structure and good cooling effect, and can be applied to the traditional high speed permanent magnet synchronous motor.

Description

technical field [0001] The invention belongs to the technical field of motors, and in particular relates to a rotor structure of a high-speed permanent magnet synchronous motor. Background technique [0002] Due to the high speed and high power density of high-speed motors, the geometric size of high-speed motors is much smaller than that of low- and medium-frequency motors of the same power, which has become a research hotspot in the field of motors. At present, the application fields of high-speed motors are becoming more and more extensive, such as high-speed grinding machines and other processing machine tools, high-speed flywheel energy storage systems, high-speed centrifugal compressors and blowers used in natural gas transmission and sewage treatment, etc. Recently, micro gas turbines driving high-speed generators for distributed power supply systems have received increasing attention. Due to its simple structure, high efficiency and power density, and no excitation ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H02K1/27H02K21/02H02K1/32
Inventor 寇宝泉何国忠李立毅张达
Owner HARBIN INST OF TECH