复合桥路双参量自动择一变换电路原理
The Principle of Electric Circuit for Bivariable Automatic Alternative Trans-Formation of Compound Bridge
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摘要: 本文提出由传感器和四臂桥式电路组成的复合桥路.讨论了双参量自动择一变换原理, 并在附录中给出了推导过程.复合桥路采用双对角线复合输出,可以自动选择被测参量中较 大和较小者.文中介绍了一个三相交流电动机过载-不平衡保护的热敏复合电桥的实例,已在 工业中应用.Abstract: In this paper, the compound bridge consisting of sensors and some electrical elements is proposed. The principle for bivariable alternative transformation of the compound bridge is discussed and its deduction is given in the appendix. The diagonal current sum or difference of compound bridge has been regarded as output, its quantity can be selected as the larger or the smaller measured variable automatically. An example of electrical circuit of the thermosensitive compound bridge relay for overload and non-balance protection of three-phase A.C. motor is introduced. It has been used in industry.
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