New Normal Mode dv/dt Filter With a Built-In Resistor Failure Detection Circuit
New Normal Mode dv/dt Filter With a Built-In Resistor Failure Detection Circuit
复制标题
具有内置电阻故障检测电路的新型常模 dv/dt 滤波器
DOI：
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发表时间：
2017
影响因子：
4.4
通讯作者：
Mark A. Baumgardner
中科院分区：
文献类型：
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作者：
M. Swamy;Mark A. Baumgardner
绝缘栅双极晶体管（IGBT）将很快被宽带隙器件（SiC和GaN）取代，成为电压源逆变器中功率半导体开关的选择。与IGBT器件相比，这些器件具有极快的上升时间和下降时间。脉宽调制输出的高dv/dt会在交流电机的绝缘系统中产生过大的电压应力，这是由于与驱动器相距较远的电机相关的电压反射问题。在许多油田应用中，电机和变频驱动器之间的距离接近300米。在步行钻机应用中，通常每相使用多个较小尺寸的导体，将其聚在一起，以实现所需的载流量。这种做法导致电缆寄生电容的值高于通常值。已经发现用于减轻电动机端子处的过电压的传统dv/dt滤波器不足以降低这种油田设施中的电动机端子处的过电压。阻尼电阻器经常经受高电压而损坏。本文提出了一种新的dv/dt滤波器，它适用于距离接近300 m的大功率交流电动机，并带有一个内置的电阻故障检测电路。给出了测试结果来证明其有效性。
Insulated gate bipolar transistors (IGBTs) will soon be replaced by wide band gap devices (SiC and GaN) as the choice for power semiconductor switch in voltage source inverters. These devices have extremely fast rise time and fall time compared with IGBT devices. The high dv/dt of pulse-width modulation outputs create excessive voltage stress in the insulation system of ac motors due to voltage reflection issues associated with motors at large distances from the drive. In many oil field applications, the distance between the motor and the variable frequency drive approaches 300 m. In walking rig applications, it is common to use multiple smaller sized conductors per phase, bunched together, to achieve the desired ampacity. This practice results in higher than usual value of the cable parasitic capacitance. Traditional dv/dt filters used for mitigating over-voltage at motor terminals have been found to be inadequate in reducing the over voltage at the motor terminals in such oil field installations. The damping resistor often experiences high voltage and gets damaged. A new dv/dt filter suitable for use with high power ac motors at distances nearing 300 m with a built-in resistor failure detection circuit is proposed here. Test results are given to demonstrate its efficacy.