DO890 3BSC690074R1价格不实模块励磁控制器ABB

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 至通孔电感。APD封装可以非常大，这通常要求APD放置得比理想的更远离放大器。如图65所示，两个器件之间增加的距离导致APD和运放反馈网络之间的电感增加。增加的电感对去补偿放大器的稳定性不利，因为它将APD电容与噪声增益传递函数隔离。噪声增益由等式4给出。反馈网络之间增加的PCB迹线电感增加了等式4中的分母，从而降低了噪声增益和相位裕度。在TO罐中使用带引线APD的情况下，应通过尽可能短地切断TO罐的引线来进一步减小电感。图65所示的布局可以通过遵循图66所示的一些指导原则来改进。需要遵循的两个关键规则是：•尽可能靠近放大器的反相输入端添加隔离电阻器RISO。选择RISO值，使其介于10Ω和20Ω之间。电阻器抑制了由迹线电感和放大器内部电容引起的潜在谐振。•关闭反馈元件（RF和CF）和RISO之间的环路，尽可能靠近APD引脚。这确保了更平衡的布局并减少了APD和反馈网络之间的电感隔离。其中•ZF是反馈网络的总阻抗。to via inductance. APD packaging can be quite large which often requires the APD to be placed further away from the amplifier than ideal. The added distance between the two device results in increased inductance between the APD and op amp feedback network as shown in Figure 65. The added inductance is detrimental to a decompensated amplifiers stability since it isolates the APD capacitance from the noise gain transfer function. The noise gain is given by Equation 4. The added PCB trace inductance between the feedback network increases the denominator in Equation 4 thereby reducing the noise gain and the phase margin. In cases where a leaded APD in a TO can is used inductance should be further minimized by cutting the leads of the TO can as short as possible. The layout shown in Figure 65 can be improved by following some of the guidelines shown in Figure 66. The two key rules to follow are: • Add an isolation resistor RISO as close as possible to the inverting input of the amplifier. Select the value of RISO to be between 10 Ω and 20 Ω. The resistor dampens the potential resonance caused by the trace inductance and the amplifiers internal capacitance. • Close the loop between the feedback elements (RF and CF) and RISO as close to the APD pins as possible. This ensures a more balanced layout and reduces the inductive isolation between the APD and the feedback network. where • ZF is the total impedance of the feedback network. 

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Must be engaged in the installation,assembly or maintenance of equipment and other related industriacontroeectrica machinery and other related technica personne.应用范围:

应用于品牌本系列工业以及生产生活自动化设备产品。

Used in the brand of this series of industriaand production automation eauipment products

适用于场景:系统集成，非标定制，产线升级改造，原设备电气替换等等。

Suitable for scenarios:system integration,non-standard customizationproduction line upgrading and transformation,electrical replacement of original equipment,etc.

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适用水泥，木业，石业，橡胶，石油，化工，发电，环保，水处理，制冷，交通，钢铁，食品，饮料，船舶，制冷等行业

Applicable to cementwood,stone,rubber,petroleumchemical, power generation,