Based on the demand of ripple and intrinsically safe, for mine intrinsically safety power supply Buck converter, the working principle under continuous conduction mode(CCM) and discontinuous conduction mode(DCM), and of load voltage- the load of the four work area is analyzed,and the influence factors of the output ripple is also analyzed. According to the requirement of the minimum of maximum output ripple voltage and from the perspective of safety criterion of minimum output short-circuit release energy, it is concluded that the scope of parameter of the Buck circuit inductance and capacitance is given for mine safety power supply design methods and steps of the Buck converter. According to the practical application, structure the system test platform, the experimental results verify the correctness and effectiveness of the theoretical analysis.

提出粗糙集(RS)和模糊支持向量机(FSVM)相结合的电动机故障诊断方法.先利用粗糙集对属性进行约简,然后将约简属性作为FSVM的输入,再对其进行训练,实现多分类,并使结果可视化.实际诊断结果验证了此方法的可行性与有效性.

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