交流接触器接通过程时间特性的试验研究

发布时间：2018-04-30 18:03

本文选题：交流接触器 + 时间参数　；参考：《河北工业大学》2014年硕士论文

【摘要】：接触器作为低压电器中重要的控制器件之一，其可靠性和使用寿命一直备受关注，交流接触器在使用时不停的执行的接通与分断操作会给触头的磨损造成严重的影响，故触头是交流接触器可靠性最薄弱的环节。保证交流接触器能否可靠性工作的重要的参数是电气参数中的时间参数，它不仅会对接触器的操作频率有一定的影响，还会对接触器触点的寿命造成直接影响，而这些时间参数的获取均可从接触器接通与断开过程中触头的电压、电流波形中提取出来，研究交流接触器的电性能特征，获取交流接触器接通过程中触头和线圈的电压、电流波形并从中提取出吸合时间、回跳时间等表征触头性能的时间参数，对于提高交流接触器的整机性能、预知安全隐患具有重要的意义。首先，设计搭建了交流接触器时间参数测试系统的硬件部分。测试系统的硬件主要包括线圈驱动控制电路、数据采集电路以及触头电压、电流检测电路。线圈驱动控制电路采用固态继电器SSR作为控制开关器件，数据采集电路选用高速数据采集卡，触头电压、电流检测电路采用响应时间短、精度高、线性度好的传感器来构成。其次，设计了交流接触器时间参数测试系统的软件部分。测试系统的软件采用虚拟仪器Labview进行设计，主要包括线圈驱动控制程序、选相合闸程序以及数据采集和处理程序，由于试验系统数据量大、采样速度快，故采用TDMS数据流格式对相关数据进行保存。最后，应用交流接触器时间参数测试系统进行试验研究。在不同合闸相角下，进行交流接触器接通过程时间特性测试试验，监测了交流接触器触头电压、电流及线圈电压、电流波形，研究了吸合时间、弹跳时间与合闸相角的关系，发现最佳的合闸相角。交流接触器时间参数测试系统能实现合闸相角控制，，能实时监测交流接触器线圈及触点的动态电压电流波形，能实时获取吸合时间和弹跳时间参数，并有便捷的人机交互界面。
[Abstract]:As one of the most important control devices in low voltage electrical apparatus, the reliability and service life of contactor have been paid close attention to. The on-off and break operation of AC contactor will cause serious impact on the wear of contact. Therefore, the contact is the weakest link in the reliability of AC contactor. The important parameter to ensure the reliability of AC contactor is the time parameter of electrical parameter. It will not only have certain influence on the operating frequency of contactor, but also directly affect the contact life of contactor. These time parameters can be extracted from the voltage and current waveform of the contactor during the process of connection and disconnection. The electrical characteristics of the AC contactor are studied, and the voltage of the contact and the coil during the switching process of the AC contactor are obtained. The current waveform and extracting the time parameters such as suction time and rebound time to characterize the contact performance are of great significance for improving the performance of the AC contactor and predicting the hidden dangers of safety. Firstly, the hardware part of the time parameter testing system of AC contactor is designed and built. The hardware of the test system mainly includes coil drive control circuit, data acquisition circuit and contact voltage and current detection circuit. The coil drive and control circuit uses solid state relay SSR as the control switch device, and the data acquisition circuit uses high-speed data acquisition card. The detection circuit of contact voltage and current is composed of sensors with short response time, high precision and good linearity. Secondly, the software of time parameter testing system of AC contactor is designed. The software of the test system is designed with virtual instrument Labview, including coil drive control program, phase selection and closing program and data acquisition and processing program. Because of the large amount of data in the test system, the sampling speed is fast. Therefore, the TDMS data stream format is used to save the relevant data. Finally, the time parameter test system of AC contactor is used to test. Under different closing phase angles, the characteristics of AC contactor's on-on time were tested, the contact voltage, current, coil voltage and current waveform of AC contactor were monitored, and the relationship between the suction time, the bounce time and the closing phase angle was studied. The optimum closing phase angle is found. The time parameter testing system of AC contactor can realize the control of closing phase angle, monitor the dynamic voltage and current waveform of AC contactor coil and contact in real time, obtain the parameters of suction time and jump time in real time, and have a convenient man-machine interface.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM572.2

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