Motor control and multi-function protection circuit for vibration testing

Abstract

The invention relates to a motor control and multifunctional protection circuit for vibration tests. The motor control and multifunctional protection circuit for vibration tests comprises a direct-current motor operation control circuit, a short circuit protection circuit and an open circuit detection and open circuit point judgment circuit and particularly comprises a light-operated MOS tube 1, an inductor L1, a current sensor CS1, a motor M, a short circuit comparator IC1, an open circuit comparator IC2, an optocoupler IC3, a driving audion Q1, a short circuit audion Q2, an open circuit audion Q3, a current-limiting resistor R1, a base electrode resistor R2, a blocking voltage-regulator tube DW1, an input resistor R3, a thyristor VT1 and the like. By means of the optocoupler serially connected into a main circuit and cooperative relationships of circuit parameters, short circuit protection can be performed reliably. By combining a motor operation control signal and an actual current signal, whether the main circuit is disconnected can be judged reliably, and whether the inside of the main circuit is disconnected or the motor on the site or a connected wire of the motor is disconnected can be distinguished reliably. The motor control and multifunctional protection circuit for vibration tests is high in accuracy, strong in real-time performance, low in cost, good in universality and high in reliability.

Description

technical field [0001] The invention belongs to the field of industrial measurement and control, and relates to a circuit, in particular to a motor control and multifunctional protection circuit for vibration testing, which is suitable for monitoring and calibrating loose parts in nuclear power production equipment. Background technique [0002] In nuclear power plant reactor equipment and other production equipment, it is often necessary to monitor the looseness of mechanical parts in the production equipment to ensure the safe operation of the production equipment. At present, the commonly used solution is to install an acceleration sensor on the production equipment that needs to be monitored, and connect the output signal of the acceleration sensor to the charge amplifier installed near it, and then transmit the output signal of the charge amplifier to the control room. At the same time, The monitoring channel needs to be calibrated regularly. For this reason, a test imp...

AI Technical Summary

Problems solved by technology

The disadvantage of the existing scheme is that the motor used for the impact is installed on the reactor equipment of the nuclear power plant, and the working environment is harsh, while the motor controller is installed in the control room, and the two are far apart. Therefore, when the motor device or the circuit breaks down , it is difficult to diagnose the type and location of the fault in time, and it is difficult to maintain

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