Built-in permanent-magnet motor based on I-shaped rotor structure
A rotor structure, permanent magnet motor technology, applied in the direction of magnetic circuit shape/style/structure, magnetic circuit, electric components, etc., can solve the problem of high cogging torque amplitude, reduce torque ripple and increase rotor complexity , the effect of cogging torque reduction
Inactive Publication Date: 2017-01-04
湖北立锐机电有限公司
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Problems solved by technology
European patent EP 2779386 A2 discloses a design of rotating rotor laminations. An auxiliary cavity is set near the magnetic barrier, and the two rotors in the axial direction use rotating laminations respectively. The cogging torques generated cancel each other out, but the cogging torque amplitude value is still high
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[0021] refer to Figure 1-8 , the specific embodiment adopts the following technical solutions: the built-in permanent magnet motor based on the I-type rotor structure includes a rotor core 1 and a permanent magnet 2, and the rotor core 1 is an I-type rotor structure, and the I-type rotor structure is asymmetric structure( image 3 , Figure 5 Depend on image 3 Obtained from the mirror image of the front view), the permanent magnets 2 are symmetrically distributed on both sides of the center line OD, the shapes of the two magnetic isolation bridges of the first permanent magnet slot 3 are different, and the specific features are: the offset of the second magnetic isolation bridge 5 It is larger than the first magnetic isolation bridge 4, and the specific parameters of its shape are obtained by numerical analysis and calculation.
[0022] The rotor core 1 is divided into two parts, the first part rotor 6 and the second part rotor 7. The same rotor is punched. The first part...
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The invention discloses a built-in permanent-magnet motor based on an I-shaped rotor structure, and relates to a rotation motor with a permanent magnet. The built-in permanent-magnet motor comprises rotor cores and permanent magnets, wherein each rotor core is of an I-shaped rotor structure and is divided into a first part rotor and a second part rotor, the first part rotor and the second part rotor adopt the same rotor punching sheet, the first part rotor is formed by upwards laminating a front surface of a core lamination sheet, the second part rotor is formed by upwards laminating a back surface of the core lamination sheet, the axial lengths of the first part rotor and the second part rotor are adjustable, the permanent magnets are symmetrically arranged at two sides of a central line OD, two magnetic isolation bridges of a first permanent-magnet groove are not consistent in shapes, and the offset quantity of a second magnetic isolation bridge is larger than that of a first isolation bridge. By the built-in permanent-magnet motor, the cogging torque, the torque ripple and the axial electromagnetic force can be effectively reduced on the premise that the rotor complexity is not increased and the other performance indexes of the motor are not affected.
Description
technical field [0001] The present invention relates to a rotating electric machine with permanent magnets, in particular to an interior permanent magnet electric machine with an asymmetrical I-type rotor structure. Background technique [0002] Due to high torque density and high efficiency, permanent magnet motors have been widely used in aerospace, CNC machine tools, robots, electric vehicles, etc. According to the position of permanent magnets in the rotor, permanent magnet motors are divided into surface-mounted permanent magnet motors (SPM ) and interior permanent magnet motors (IPM). The torque of the built-in permanent magnet motor includes permanent magnet torque and reluctance torque. The permanent magnet torque is generated by the interaction between the rotor permanent magnet magnetic field and the stator magnetic field; produced by the rotor. Therefore, interior permanent magnet motors have higher power density and efficiency, other things being equal. It is ...
Claims
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IPC IPC(8): H02K1/27H02K29/03
CPCH02K1/2766H02K29/03
Inventor 任武叶攀许强钟运平
Owner 湖北立锐机电有限公司