A Stator Permanent Magnet Hybrid Magnetic Circuit Moving Iron Core Linear Oscillating Motor
A stator core and hybrid magnetic circuit technology, applied in the direction of electromechanical devices, electrical components, etc., can solve the problems of reducing the robustness and safety of the motor, deteriorating the working environment of the permanent magnet, and losing the main performance of the motor, so as to save resources, Compact structure, saving manufacturing and maintenance
Active Publication Date: 2019-09-27
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
Their common defect is that the permanent magnet, as a vulnerable part, participates in linear oscillation in the air gap, which increases the difficulty of processing technology and reduces the robustness and safety of the motor. Especially under high-frequency oscillation and harsh working conditions, its reliability lower sex
In addition, the permanent magnet is located in the alternating electromagnetic field, and the heat generated by the eddy current loss is difficult to dissipate during the movement, which deteriorates the working environment of the permanent magnet, resulting in the loss of the main performance of the motor and the shortening of the service life.
Moreover, the amount of rare earth permanent magnets in the motor is relatively large, and there is still room for further reducing the amount of rare earth materials
Method used
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[0039] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific implementation examples described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0040] The technical principle of the motor of the present invention is the principle of magnetic flux reversal: when the stator winding of the motor is fed with current, the armature magnetic field of one of the stators demagnetizes the permanent magnet magnetic field, while the armature magnetic field of the other stator increases the magnetization of the permanent magnetic field, t...
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The invention provides a stator permanent-magnet hybrid magnetic path dynamic iron core type linear oscillation motor which comprises a stator core, stator back iron, a rotor core, a shaft, permanent magnets, an armature winding, a housing and a resonance spring. A plurality of rectangular permanent magnets are uniformly embedded into a stator yoke along the circumference. The stator back iron which is composed of an annular stator core is arranged outside the stator core. A plurality of arc-shaped permanent magnets are uniformly embedded into a radial clearance between the stator core and the stator back iron. A plurality of coils are wound on the stator core. Random adjacent coil are serially connected in reverse directions. The rotor core is mounted on the central part of the shaft. The resonance spring sleeves between the rotor core on the shaft and an end cover. The permanent magnets in the motor according to the invention do not participate in reciprocating vibration, thereby greatly improving safety, reliability and robustness of the motor. Through reasonably introducing a permanent magnet additional magnetic path, a purpose of cost reduction is realized. Furthermore reliability, safety and maintainability of the motor are improved. Additionally motor power density is improved.
Description
technical field [0001] The invention belongs to the field of linear oscillating motors, and more specifically relates to a linear oscillating motor in which two types of permanent magnets are used for parallel excitation, and the permanent magnets are embedded in the stator, and the moving and force-bearing parts are mover iron cores. motor. Background technique [0002] For a long time, linear reciprocating motion has been mainly realized by traditional rotating motor + crank and other transmission mechanisms. This method has been criticized for its low efficiency and power factor, complex structure, and bulky volume. The use of permanent magnet linear oscillating motors to achieve linear reciprocating motion can not only save intermediate transmission mechanisms such as cranks, but also significantly improve efficiency and power factor, so it has received widespread attention. [0003] Permanent magnet linear oscillating motors can be divided into moving coil type, moving...
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IPC IPC(8): H02K16/04H02K33/12
Inventor徐伟李想叶才勇
OwnerHUAZHONG UNIV OF SCI & TECH