Permanent magnet motor rotor structure and high-speed permanent magnet motor using same
A permanent magnet motor and rotor structure technology, applied in the direction of magnetic circuit shape/style/structure, motor, magnetic circuit rotating parts, etc., can solve the problem of providing better protection for the motor rotor shaft, and achieve low installation difficulty and economical efficiency High, not easily damaged effect
Pending Publication Date: 2022-07-08
SHANGHAI TECH UNIV +1
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] In view of the shortcomings of the prior art described above, the purpose of this application is to provide a permanent magnet motor rotor structure and a high-speed permanent magnet motor applied to it, which is used to solve the problem that the sheath of the permanent magnet motor in the prior art cannot operate at low speed and high speed respectively. The problem of providing better protection for the motor rotor shaft at the same time
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0020] The embodiments of the present application are described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other under the condition of no conflict.
[0021] It should be noted that, in the following description, reference is made to the accompanying drawings, which describe several embodiments of the present application. It is to be understood that other embodiments may be utilized and mechanical, structural, electrical, as well as o...
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
Login to View More Abstract
The invention provides a permanent magnet motor rotor structure and a high-speed permanent magnet motor using the same, and the permanent magnet motor rotor structure comprises a rotor core of which the inner peripheral surface is connected with a motor rotating shaft; the inner peripheral surface of the permanent magnet is connected with the outer peripheral surface of the rotor core; the inner ring of the inner sheath is connected with the peripheral surface of the permanent magnet; the inner peripheral surface of the outer sheath is connected with the outer peripheral surface of the inner sheath; a low-speed interference magnitude is preset between the inner-layer sheath and the permanent magnet; the thermal expansion coefficient of the inner sheath is larger than that of the outer sheath; when the motor rotor is in a high-speed thermal-state operation state, the inner sheath generates a larger thermal expansion degree than the outer sheath so as to extrude the permanent magnet, so that a high-speed interference magnitude greater than a low-speed interference magnitude is generated between the inner sheath and the permanent magnet. According to the invention, equivalent protection can be provided for the permanent magnet when the motor rotates in a low-speed cold state and a high-speed hot state; the rotor sheath is low in installation difficulty, and the permanent magnets are not easy to damage in the installation process; the eddy current loss generated by the rotor sheath is small, and the heat dissipation capability is good.
Description
technical field [0001] The present application relates to the technical field of permanent magnet motors, and in particular, to a permanent magnet motor rotor structure and a high-speed permanent magnet motor to which it is applied. Background technique [0002] High-speed permanent magnet motor generally means that the speed exceeds 10000rpm, or the difficulty value (the product of the square root of the power and the speed) is greater than 1×10 5 And a motor with a permanent magnet to provide a magnetic field. Compared with ordinary motors, high-speed permanent magnet motors have the advantages of high speed, high power density, small geometric size, and simple structure. Due to its various excellent properties, high-speed permanent magnet motors have now become one of the main research directions in the international electrical field. [0003] However, the permanent magnets inside the high-speed permanent magnet motor have low tensile strength. When the motor rotates a...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02K1/2781H02K1/28
CPCH02K1/278H02K1/28H02K2201/03H02K2213/03Y02T10/64
Inventor 张郇吴福仙
Owner SHANGHAI TECH UNIV