Ideal abnormity magnet magnetic circuit calculation method
Ideal abnormity magnet magnetic circuit calculation method for the so-called ideal magnetic circuit is no leakage, no steep resistance within, no working point spread popularity, all flux of permanent magnet gap.
At this point, the Bd for the working point of permanent magnet magnetic flux density;
Am for permanent magnet pole area;
Bg for the air gap flux density;
Ag is air gap size.
At the same time, according to the second law of magnetic circuit, HD to obtain permanent magnet Bd corresponding magnetic field strength of the river.
LM to the length of magnet magnetization direction in water;
Hg as the air gap magnetic field strength;
Lg for air gap length.
Force coefficient curve, the speaker said magnetic gap force coefficient curve is available.
Ideally, we want to BI (
Best is a constant, and the curve is a straight line, but it is almost impossible.
This curve: after leaving the magnetic gap center, to the outside introversion is a downward trend, and is not symmetrical.
Force coefficient changes, the speaker by electric power also produces change, is not constant.
Lack of true is accompanying.
Distribution of asymmetric knife I speaker of even order harmonic distortion and intermodulation distortion.
And tong (
Curve of the uneven will cause the speaker's harmonic and intermodulation distortion.
When we in the design of magnetic circuit, to try to do it to shave (
Even, in order to pass the case (
Curve on the judgment.
The blow force coefficient (
Blade with displacement x with the distribution of the magnetic field strength with the displacement distribution of x, in most cases are not consistent, voice coil width of suppression and the positions of the voice coil in the magnetic gap lili.
Only a short circle design, both are consistent.
Influence factors on the quality of the products: rolling deformed magnet material in rolling forming rollers and the roller speed, heat part is needed for the roller, the other part from material and roller friction between Jane and material itself, the heat generated by the shearing action.
In addition to the size of the friction heat and roller speed, also associated with the plasticizing degree of material, also related to its viscosity.
Therefore, different materials, under the condition of phase this authorization together with your completed roll speed, the temperature control is different.
Once again, the same formula but different rotating speed, the control temperature is also different.
Calender, the materials often stick on the high temperature or high speed roll Jane, in order to make the material can, in turn, stick on the roller, avoid to take the air, temperature of each roller is generally increase one, but three roller, four roller temperature is close to, so easy to film on the three roll away from it.
Each roll for 5 ~ 10 ℃ temperature difference magnet company is the specialized production (
Abnormity of magnet company in dongguan city based wangniudun town pier has production factories.
Magnet products used in toys, jewelry, crafts gifts, handmade gift box, leather handbags invisible magnetic button, plastic hardware products, audio equipment and other industries.
Our company is located in dongguan city based wangniudun block cao beijiao town five chung village industrial zone, the company can provide customers 24 hours delivery, 36 hours to the customers specifications template.
Magnet experts to find and package your satisfaction, more magnets can view our company website WWW information.
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