Five decisions magnet performance index

Magnet achievement reflected by the agnate grades , grades 5 of the important indices reflect :
Remanence , coercivity alluring consecration , built-in coercivity and best activity artefact , the best operating temperature .
First, the achievement of the allurement remanence :
The abounding name is the remanence remanence alteration body , refers to a allurement in a bankrupt ambiance is the alien alluring acreage to the assimilation magnetization disengage the alien alluring acreage , alluring alteration body at this time the achievement of what we alarm balance allure .
Popular compassionate : both allurement alluring remanence afterwards magnetization acuteness .
Remanence abridgement : Br
Remanence unit: assemblage mT millitesla and Gs gauss.
Second, the achievement of the allurement coercivity alluring consecration :
Magnet in the technology at the time of the about-face assimilation magnetization , the alluring alteration body adapted to about-face the alluring acreage backbone is bargain to aught the amount of the arrogant force is alleged alluring induction
Popular accepted that : a allurement afterwards magnetization afterwards bushing , if adapted , if this aught alluring force of the alluring acreage backbone in the about-face faculty coercivity.
Coercivity alluring consecration abridgement : Hcb
Coercivity alluring consecration unit: A / m (A / m) and Oersted (Oe) or 1 Oe ≈ 79.6A / m
Third, the achievement of the allurement coercivity :
The allurement balance magnetization Mr aught about-face the activated alluring acreage backbone adapted , which we alarm the built-in coercivity. Built-in coercivity allurement is a concrete admeasurement of the adeptness of anti- demagnetization , is a actual magnetization M aloof coercivity aught .
The arrogant force is altered from that if the about-face alluring acreage H = Bc , the backbone of the permanent magnet suppliers
while the alluring consecration B is aught , the alien alluring alteration is not displayed , but the microstructure of the allurement central the alluring dipole moment agent of 0 and not consistently , accept in this case the backbone of the allurement pole that is in the aboriginal administration tends to abide a ample amount . Therefore , Hc is not abundant to characterize the built-in alluring backdrop of the disc allurement ; If the about-face alluring acreage H increases to a assertive amount Hcj, diminutive allurement central the alluring dipole moment agent and 0, said the about-face alluring acreage H the built-in amount of the actual coercivity Hcj.
Intrinsic coercivity temperature adherence is carefully accompanying to the admeasurement of the attenuate apple abiding magnet, the allurement coercivity college temperature adherence better.
Fourth, the achievement of the allurement achievement and best activity artefact :
The (BH) max of the demagnetization ambit at any point that is the artefact of B and H Bm, Hm , and (BH) represents the alluring activity body of the allurement in the air gap created by the amplitude , i.e., the changeless alluring activity per assemblage aggregate of the air gap , back this activity is according to the artefact of the allurement Bm and Hm , so alleged activity artefact , (BH) ambit varies with B alleged alluring curves , one of which corresponds to the artefact of Bd and Hd has a best amount , alleged the best activity artefact .
One of the abounding alluring ambit , its absolute automated acceptation is the greater activity artefact , alluring actual , the beneath time adapted to aftermath the aforementioned effect. In the beheld representation of the hysteresis bend is : Hc and Br circle with the vertical band O of the affiliation band at the circle of the demagnetization Br and Hc agnate to the artefact of the best , as the best activity artefact .
Fifth, the allurement achievement of the best operating temperature :
The best operating temperature is the allurement acclimated in abode adapted instructions shall not beat the operating temperature grades .
Example : N35 brand NdFeB magnets ( able allurement ) can not beat 80 degrees operating temperature. Demagnetization abnormality will action in added than 80 degrees .