Miniature electromagnetic switch valve driving controller based on valve core displacement soft measurement

Abstract

The invention relates to a miniature electromagnetic switch valve driving controller based on valve core displacement soft measurement, which comprises a power supply module, a DSP control unit, a signal isolator, a driving circuit module, an electromagnetic switch valve, a current acquisition module, a pressure acquisition module and a temperature acquisition module, wherein the power supply module is connected with the DSP control unit, the signal isolator and the driving circuit module, the electromagnetic switch valve is connected with the driving circuit module, the current acquisition module, the pressure acquisition module and the temperature acquisition module, and the current acquisition module and the temperature acquisition module are connected with the DSP control unit. According to the invention, three-voltage driving is adopted, the duty ratio of a low-voltage high-frequency signal can adapt to changes of external supply pressure, the controllable range of the duty ratio can be widened, the precision of adapting to working condition changes is improved, the dynamic response characteristic of the electromagnetic switch valve is improved, the stability of a hydraulic system is improved, and energy loss is reduced.

Description

technical field [0001] The invention belongs to digital element drive control technology, in particular to a miniature electromagnetic switch valve drive controller based on valve core displacement soft measurement. Background technique [0002] The miniature electromagnetic switching valve has the advantages of simple structure, short response time, small pressure loss, insensitivity to oil pollution and reliable operation. It can not only reduce the throttling loss of the valve control system, but also improve the anti-pollution ability of the electro-hydraulic control system. It is widely used in aerospace, automotive engineering equipment and other fields. As the core control element of the electro-hydraulic digital control system, the miniature electromagnetic switch valve controls the speed and direction of the actuator and affects the dynamic and static performance of the valve control system. Therefore, improving the performance of the electromagnetic switching valv...

AI Technical Summary

Problems solved by technology

However, when the miniature electromagnetic switching valve is working, its dynamic characteristics will be affected by the main factors such as external pressure and temperature, and it is difficult to maintain the stability of the work; at the same time, the structure of the miniature electromagnetic switching valve is relatively compact, and the displacement of the valve core is difficult to measure directly and cannot be measured in real time. Feedback the state of the spool, using pressure to indirectly feedback the switching state of the spool has delay errors and poor real-time performance

The traditional driving method is not very adaptable to external pressure changes, and the energy loss needs to be further reduced

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