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一、概述电磁系仪表是一种广泛使用的电工测量仪表,在国外常被称做“动铁式仪表”或“软铁式仪表”。顾名思义,这种仪表的工作原理是建立在“电磁力”相互作用的基础上,并且在测量机构中具有可动的软磁元件。事实也是如此,早期的电磁系仪表就是利用放在带电线圈附近的软磁元件能被吸入其中的现象制成的。图1—1就是AEG公司1890年生产的电磁系电压表的测量机构。当线圈2接入待测量时便产
First, an overview of electromagnetic system instrument is a widely used electrician measuring instruments, often abroad is called “moving iron instrument” or “soft iron instrument.” As the name implies, the working principle of this instrument is based on the interaction of “electromagnetic force” and has a movable soft magnetic element in the measuring mechanism. The same is true, the early electromagnetic instrumentation is the use of soft magnetic components placed near the charged coil can be inhaled into the phenomenon made. Figure 1-1 is the AEG company 1890 production of electromagnetic voltmeter measuring mechanism. When coil 2 is to be measured, it is produced