Rotating electrical machine
A technology for rotating electrical machines and rotors, applied to electrical components, electromechanical devices, electric components, etc., which can solve problems such as the reduction of the mechanical strength of the rotor core, achieve the effect of improving torque performance and ensuring mechanical strength
Inactive Publication Date: 2019-10-08
HONDA MOTOR CO LTD
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Problems solved by technology
[0006] However, in the above-mentioned conventional technology, there is a problem that the mechanical strength of the rotor core decreases due to the openings formed in the electrical steel sheet.
Method used
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no. 6 approach
[0090] Therefore, according to the above-described sixth embodiment, the same effects as those of the above-described embodiment and the first to fifth modifications can be achieved. In addition, since the predetermined processing portion 60 is only formed on the rotor core 4 , sufficient mechanical strength of the rotor core 4 can be ensured. In addition, in order to make the predetermined processing portion 60 a non-magnetic material, at least one of carbonization, nitriding, and heat treatment is selected and applied to the portion where the predetermined processing portion 60 is formed. Therefore, the predetermined processing portion 60 can be easily made of a non-magnetic material.
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The invention provides a rotating electrical machine capable of sufficiently ensuring mechanical strength and improving torque performance. The rotating electrical machine is provided with a stator (20) around which a coil (24) is wound; and a rotor (2), the motor is provided with a rotor iron core (4) made of magnetic materials and arranged in a manner of freely rotating relative to a stator (20), and a permanent magnet (7) embedded in the rotor iron core (4). First to fifth pore groups (11 to 15) comprising a plurality of pores are provided around a permanent magnet (7) in a rotor core (4) for each pole, and the pore groups (11 to 15) are arranged in a row so as to protrude toward the rotational axis (P) of the rotor core (4). The pore groups (11 to 15) are aligned with each other.
Description
technical field [0001] This invention relates to rotating electric machines. Background technique [0002] Among the rotating electric machines, there is a rotating electric machine including a rotor having a rotor core made of a magnetic material rotatably provided with respect to the stator, and a permanent magnet embedded in the rotor core, and a stator around which coils are wound. Many permanent magnets have a plate shape in order to suppress manufacturing costs. In such a rotating electrical machine, the surface magnetic flux density formed in the rotor core by the permanent magnets greatly affects the torque performance of the rotating electrical machine. Therefore, it is desirable to guide the magnetic flux of the permanent magnets to the outer peripheral surface of the rotor core as much as possible. [0003] However, since the permanent magnets are embedded in the rotor core, a so-called leakage flux that is not guided to the outer peripheral surface of the rotor...
Claims
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IPC IPC(8): H02K1/27
CPCH02K1/274H02K2213/03
Inventor 大平健悟滨村刚
Owner HONDA MOTOR CO LTD