Steam turbine valve position control board card driving current generation loop

• Main Authors: WU JIABING, ZHOU FENG, YAN YANBIN, YUAN AIDONG, XU LEI, TANG CHENDONG, ZHANG DONGLIANG
• Format: Patent
• Language: Chinese; English
• Published: 24.11.2020
• Subjects: BLASTING; ENGINE PLANTS IN GENERAL; HEATING; LIGHTING; MACHINES OR ENGINES IN GENERAL; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; MECHANICAL ENGINEERING; NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAMTURBINES; PHYSICS; STEAM ENGINES; TESTING; WEAPONS

The utility model discloses a drive current generation loop of a valve position control board card of a steam turbine in the technical field of steam turbines. The circuit comprises a current generation loop and a sampling resistor R1. One end of the sampling resistor R1 is connected with the positive electrode of the amplifier U1; the output end of the current generation loop is connected with the other end of the sampling resistor R1 and the negative electrode of the amplifier U1, the output end of the amplifier U1 is connected with the positive electrode of the comparator U2 and the input voltage measuring end of the analog-to-digital converter U3, the output end of the comparator U2 is connected with the polarity detection unit, and the negative electrode of the comparator U2 is grounded; the structure can realize measurement of the driving current. 本实用新型公开了汽轮机技术领域内的一种汽轮机阀位控制板卡驱动电流生成回路，包括电流生成回路和采样电阻R1，采样电阻R1的一端与放大器U1的正极连接，电流生成回路的输出端与采样电阻R1的另一端和放大器U1的负极连接，放大器U1的输出端与比较器U2的正极和模数转换器U3的输入电压测量端连接，比较器U2的输出端与极性检测