Hardware Design of Intelligent Integrated Protector for Mine Low-voltage Vacuum Feeding Switch

The paper introduced hardware design of an intelligent integrated protector for mine low-voltage vacuum feeding switch based on digital signal processor and expounded technical innovations in process of hardware design of the intelligent integrated protector, including using dsPIC30F6014A digital signal processor, designing negative voltage producing circuit and standby power supply and adding LCD back-lighted control circuit and input part of gas frequency. The intelligent integrated protector adopts four-layer circuit-board structure to decrease size and improve anti-interference ability, and rowed wiring structure of out wiring terminal for convenient change underground. The testing result showed the feasibility of the intelligent integrated protector.