Voice coil motor structure of what? Before we and we introduced the classification of voice coil motor, with Mao voice coil motors are cylindrical voice coil motor, flat voice coil motor / rectangular voice coil motor, swing voice coil motor and several different forms of voice coil motor Today we take a look at the structure of the voice coil motor which can be divided into several?
1. Traditional structure of the voice coil motor:
In the conventional structure, the voice coil motor is a cylindrical coil with an air gap formed by a cylindrical center rod and a permanent magnet surrounding the center rod, and a soft iron case is covered outside the magnet and the center rod. The coil moves along the cylinder axis in the air gap. Cylindrical center rod and surrounded by a permanent magnet around the center of the air gap formed in the magnet and the central rod cover a soft iron shell. The coil moves along the cylinder axis in the air gap. Cylindrical center rod and surrounded by a permanent magnet around the center of the air gap formed in the magnet and the central rod cover a soft iron shell. The coil moves along the cylinder axis in the air gap.
In the traditional voice coil motor according to the coil stroke can be divided into long voice coil structure and short voice coil structure, that is the axial length of the coil can exceed the axial length of the magnet, that is, long voice coil structure. And sometimes according to the trip, the magnet can be longer than the coil, that is, short voice coil structure.
2. Centralized flux structure voice coil motor:
In motion control, sometimes the force required than the traditional mobile voice coil motor can provide greater force, the traditional structure of the voice coil motor can not meet the requirements. In order to solve this problem, the working efficiency of the voice coil motor needs to be improved. Therefore, the structure of the voice coil motor should be designed reasonably to minimize the magnetic flux leakage. When designing the voice coil motor, it is always hoped that the magnetic lines of the magnet will pass the air gap as much as possible so as to increase the air gap flux density and thus generate the maximum possible magnetic force. The use of a concentrated flux technique enables the manufactured motor air-gap flux density to be equal to or greater than the residual amount in the magnet.
3. Magnetic cross-access structure of the voice coil motor:
If you want to get the highest output force with the smallest possible diameter, use proprietary interleaved magnetic circuit technology. Compared with the traditional structure and the concentrated magnetic flux structure, the performance characteristics of the same, but the axial dimension longer, but the diameter size decreases, the magnet quality is smaller, but the coil tends to be heavier. The salient advantage of interleaved magnetic circuit voice coil is that the coil leakage inductance is small and the electrical time delay is very short.
Voice coil motor material selection is also very important, select voice coil motor materials need to consider the system performance, working environment, processing and cost and other factors. The coil is generally wrapped with copper or aluminum wire on a non-ferrous bobbin, the outer coated with a thin layer of polymer film to be insulated. The conductivity of aluminum wire is half the copper wire, but the weight is one-third of the copper wire. According to the specific heat and choose to use. Most of the permanent magnet materials are hard magnets, neodymium iron boron and cobalt samarium. The magnet air gap used to accommodate the coil must be large enough that the magnet must work on a lower load line, usually B / H = 1.0-2.0. In addition, the magnetic material should have a high anti-magnetic force and a very good demagnetization curve to improve the work efficiency of the magnetic circuit.
Through the above detailed description, I do not know you manufacturers have no clear understanding of our voice coil motor? Of course, specific to the practical process in order to know what the existence of the problem, we can feel free to call us: 400-007-7724 our technical engineers will explain one by one, welcome to experience and look at the real Oh!
This article originates from Kunshan Tongmao Electronics Co., Ltd. (www.tmmotion.com) original company, please indicate the source.
Linear motor