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Current position£ºHome > News How to design a linear motor structure

How to design a linear motor structure

time£º2017-10-17  click£º1977


¡¡¡¡A linear motor is a transmission that converts electrical energy directly into linear motion mechanical energy without the need for any intermediate switching mechanism. It can be seen as a rotating motor by radial cut open, and developed into a plane made. Linear motors are mainly used in three aspects: one is used in automatic control systems, such applications are more; followed by long-term continuous operation as a driving motor; third is needed in a short time, short distance to provide a huge linear motion Can be in the device. How to design and optimize the structure of linear motor research, has been the rectiline motor manufacturers to explore the issue, the following with Mao straight motor to teach you to optimize the linear motor design.
¡¡¡¡Linear motors include primary and secondary magnetic circuit structures and mechanical structures such as support, sensing, cooling, dust, and protection. The most important task of magnetic circuit design is to make the thrust and thrust of the motor to meet the design requirements. The calculation of the magnetic field distribution in the motor is the basis of the magnetic circuit design. Due to the particularity of the structure, the linear motor has the effect of end effect, causing the magnetic field distortion, and the use of soft magnetic materials such as silicon steel sheet to polymerize the magnetic circuit, the media boundary tortuous, magnetic circuit is complex and nonlinear. At present, numerical solution is widely used. The finite element method (FEM) is used to calculate the magnetic field distribution of the linear motor, so as to further calculate the thrust and its fluctuation and vertical force. At present, there are many excellent electromagnetic field FEM software available on the market, so the key point to calculate the electromagnetic field of linear motor with FEM lies in the establishment of accurate finite element model.
¡¡¡¡Reducing the thrust fluctuation is a key and difficult point of the magnetic circuit design. Thrust fluctuations occur due to: primary current and back-EMF there is a high-order harmonics, air-gap magnetic waveform non-sinusoidal, cogging, end effects. Thrust fluctuation can be reduced by optimizing the shape and arrangement of permanent magnets, reducing permanent magnet excitation flux density, primary use of coreless and multipole structures, increasing slot number, increasing air gap, etc. However, certain measures may result in other properties Of the weakening, so the design should take into account the design requirements, to achieve the desired effect.

¡¡¡¡The mechanical structure of the linear motor problem involves many, here we only emphasize the study of the cooling system, because the problem is easily overlooked. In fact, the thermal characteristics of the linear motor is an important feature, the same type of motor cooling when the peak thrust is not cool when the double, so the motor cooling system has a great impact on the performance of the motor from the cooling system Optimizing the design is a shortcut to improving motor performance. The thermal characteristics of the motor are generally analyzed by finite element method, and the cooling is optimized on the basis of the calculated results.
¡¡¡¡With Tongmao straight motor to provide the standard track, travel can be extended. infinitely, can be made of uniaxial platform system, multi-axis system, the customer can be directly installed into the device. But also can be customized according to customer needs. Our linear motor through professional staff development and design, will be able to meet your professional needs. More with Tongmao straight line motor consultation, welcome to visit with the official website to understand:www.tmmotion.com/english/index.asp