ABB DI831 3BSE013212R1模块励磁控制器

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 ct文件夹链接：OPA858版权所有©2018，Texas Instruments Incorporated Submit Documentation Feedback放大器的稳定性和相位裕度取决于放大器的环路增益，即AOL和放大器的反馈因子（β）的乘积。负反馈回路系统的β是反馈到输入端的输出信号的一部分，在放大器的情况下是噪声增益的倒数。如图60所示，可以通过添加输入电容器和反馈电容器来增加放大器在高频下的噪声增益。如果仔细操作，增加1/β可以改善相位裕度，就像任何放大器在高增益配置中比单位增益缓冲配置更稳定一样。添加了电容器的改进网络改变了高频噪声增益，但不改变信号增益。AN-1604去补偿运算放大器应用报告详细分析了去补偿放大器的噪声增益整形技术，并展示了如何选择外部电阻和电容值。图61显示了如图59所示配置的OPA858的未补偿频率响应。在没有任何附加噪声增益整形组件的情况下，OPA852的峰值约为13 dB。图62显示了如图60所示配置的OPA858的噪声增益补偿频率响应。噪声增益整形元件将峰值降低到小于1.5 dB。2.7-pF输入电容器、放大器的输入电容、增益电阻器和反馈ct Folder Links: OPA858 Copyright © 2018, Texas Instruments Incorporated Submit Documentation Feedback The stability and phase margin of the amplifier depend on the loop gain of the amplifier, which is the product of the AOL and the feedback factor (β) of the amplifier. The β of a negative-feedback loop system is the portion of the output signal that is fed back to the input, and in the case of an amplifier is the inverse of the noise gain. The noise gain of the amplifier at high frequencies can be increased by adding an input capacitor and a feedback capacitor as Figure 60 shows. If done carefully, increasing 1/β improves the phase margin just as any amplifier is more stable in a high gain configuration versus a unity-gain buffer configuration. The modified network with the added capacitors alters the high-frequency noise gain, but does not alter the signal gain. The AN-1604 Decompensated Operational Amplifiers application report provides a detailed analysis of noise gain-shaping techniques for decompensated amplifiers and shows how to choose external resistors and capacitor values. Figure 61 shows the uncompensated frequency response of the OPA858 configured as shown in Figure 59. Without any added noise gain shaping components, the OPA858 shows approximately 13 dB of peaking. Figure 62 shows the noise gain compensated frequency response of the OPA858 configured as shown in Figure 60. The noise gain shaping elements reduce the peaking to less than 1.5 dB. The 2.7-pF input capacitor, the input capacitance of the amplifier, the gain resistor, and the feedback 

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●使用前:

在操作和维护，安装设备之前，请阅读并严格遵守安全相关的信息。

Read and strictly follow safety-related information before operatingmaintainingand installing equipment.

●使用者要求:

必须从事安装，组装或维护设备等相关工控电气机械以及其他相关技术的人员。

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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应该由本品牌专业培训操作员来安装、操作和维修设备。专业人员具有技术能力强，熟悉安全信息和安全实施:

熟悉设备的安装加工、操作和维护:熟悉处理所有的潜在危险情况。

Equipment should be installed,operated and maintained by trained operators from the brand

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●除了产品特性以及功能，还需了解产品的使用寿命环境。

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Study the product instruction manual thoroughlyotherwise it may cause personal danger to non-professionals.

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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,