Rod position measuring device of motor driving type control rod driving mechanism

• Main Authors: BAI YONGJUN, TONG HUI, LIN SHAOXUAN, SHI XIAOCHEN, LIU GANG, ZHANG DONGSHENG, KUANG HONGBO, LI CHENGWU, WENG ZHIMIN
• Format: Patent
• Language: Chinese; English
• Published: 19.07.2022
• Subjects: NUCLEAR ENGINEERING; NUCLEAR PHYSICS; NUCLEAR REACTORS; PHYSICS

The utility model belongs to the field of measurement and control technology of nuclear power station reactors, and particularly discloses a rod position measuring device of a motor-driven control rod driving mechanism, which adopts a rotary transformer to monitor closed-loop servo control of the rotation angle of a motor rotor, converts the angle of the motor rotor into the ascending/descending distance of a screw according to the screw pitch of a screw transmission pair, and measures the rod position of the motor-driven control rod driving mechanism. And obtaining the rod position of the control rod. And meanwhile, one rod position detector is adopted to realize zero position calibration of the rod position control system, and a plurality of rod position triggering elements on the core rod are identified during operation, so that the actual position of the control rod assembly can be directly obtained, and each actual position can calibrate the rod position measured by the rotation angle of the motor. The r