An optimization scheme on hydrological RTU power stability
Saron Industrial · Electronics world · 2014
This article briefl y introduces the power system of hydrology RTU(Remote Terminal Unit).For the disadvantages of the power switching circuit,3.3V power supply circuit and fi eld instrumentation supply circuit of the traditional hydrological RTU system,we propose some optimization and improvements respectively.With regard to power switching circuit,we make use of the chip LTC4412 of Liner company to control the MOSFET,this can resolve the ripple when the voltage switches;For the 3.3V power supply circuit,the column inductance is replaced by the magnetic inductance with same value,this can make the magnetic fi eld line focus on magnetic inductance,so avoid the magnetic fl ux leakage;As to the fi eld instrumentation supply circuit,the electromagnetic relay is replaced by MOSFET to settle the false operation and short mechanical endurance of it.The RTU power supply system is optimized by the former three improvements to enhance the stability of it.