参数资料
型号: US2881LUA-AAA-000-BU
厂商: Melexis Technologies NV
文件页数: 13/46页
文件大小: 498K
描述: IC LATCH CMOS H-S TO-92UA
产品目录绘图: UA-92 Series Side
标准包装: 1,000
传感范围: 4.5mT 跳闸,-4.5mT 释放
类型: 双极卡锁
电源电压: 3.5 V ~ 24 V
电流 - 电源: 5mA
电流 - 输出(最大): 50mA
输出类型: 数字式,开漏极
工作温度: -40°C ~ 150°C
封装/外壳: TO-226-3,TO-92-3 短体
供应商设备封装: TO-92UA
包装: 散装
产品目录页面: 2792 (CN2011-ZH PDF)
其它名称: US2881LUA
US2881LUA-ND
This brings us once again to Br or the residual flux value, the pole orientation is now opposite the first satura-
tion state. Finally reversing the current back to its original direction we can exercise the sample through the curve
once more and pass through the +HC value to arrive once again at the Br value. We have now completed the hys-
teresis loop for the material and can draw a curve relating B to H as shown in figure "y".
Figure 10, Hysteresis Loop
This curve is fundamental to characterizing and comparing classes and grades of magnetic materials.
An important aspect of magnetic materials behavior is dependent on the physical arrangement of the magnet in
the application. In a motor the permanent magnet is operating in a magnetic circuit with mostly low reluctance
paths for the field to circulate through. In many sensor applications however the magnet operates with little or
no magnetic circuit. This operating condition is known as open loop operation.
B
H
Before magnetic force is applied (current),
domains are randomly oriented and no
energy is created.
B
S
0
When magnetic force is applied, domains
become oriented in the direction of the
applied field.
A
B
S
0
When magnetic force (current) is removed,
domains don't completely randomize,
therefor retaining some of the energy.
A
B
r
B+
0
When magnetic force (current) is reversed,
and released, the inverse of the above
occurs, creating the complete hysteresis
loop.
The hysteresis loop is unique to all magnetic
materials. This diagram does not illustrate
any specific material or magnetic circuit
A
B
r
B-
H+
H-
B
r
H
c
H
c
B
r
 = residual inductance
H
c
 = coercive force
 
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