A water leakage alarm device for a deep-water permanent magnet synchronous motor driver

Abstract

The invention relates to a water leakage alarming device of a deepwater permanent magnet synchronous motor driver and belongs to the technical field of motor equipment safety. The square wave signal output end of a high-frequency square wave signal generator of the water leakage alarming device is connected with the signal input end of a power amplification circuit. The power driving output end of the power amplification circuit is connected with one end of a primary side winding of an isolation boosting transformer T, and the other end of the primary side winding of the isolation boosting transformer T is connected with one end of a resistor R1 and the simulation sampling signal input end of an absolute value and comparator circuit, and the other end of the resistor R1 is grounded. One end of a secondary side winding of the isolation boosting transformer T is connected with a water leakage detection probe through a resistor R2, and the digital signal output end of the absolute value and comparator circuit is connected with the signal input end of an opto-isolator circuit. According to the water leakage alarming device, the high-frequency boosting transformer is adopted to isolate the water leakage detection probe and the subsequent signal processing circuit, crosstalk between signals is avoided, finial digital signals are obtained through the opto-isolator circuit, and isolation of simulation signals and the digital signals is achieved.

Description

technical field [0001] The invention belongs to the technical field of motor equipment safety. Background technique [0002] Permanent magnet synchronous motors have the advantages of high reliability, good fault tolerance, high power density, small torque fluctuations, and low vibration and noise. They are widely used in deep-water servo systems. and other fields have broad application prospects. Generally, the permanent magnet synchronous motor servo system for deep water mostly adopts an integrated motor structure, and the rear of the motor body is designed to accommodate the driver's cylinder, which is fixed on its rear end cover. However, due to the high water pressure in the deep water environment, measures are taken to fill the motor body and the drive cylinder with hydraulic oil. [0003] In this special environment, water leakage is strictly prohibited. If there is water leakage in the drive, it will cause circuit failure and cannot guarantee the normal operation ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a water leakage alarm device for deep-water permanent magnet synchronous motor drivers. Secondly, the probe needs a higher voltage to break down the water and make it conductive when detecting water leakage, so a boost circuit should be designed in the circuit, and a certain power must be satisfied at the same time. Thirdly, the water leakage detection circuit is not isolated from the signal processing circuit , it is easy to introduce interference, causing malfunction of the drive

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