In order to solve the problem that Boost transducers right-half-plane zero negative voltage cannot be accurately measured,a mathematical model of negative voltage was established.The effects of regulating energy storage inductors,input voltage,duty,duty cycle changes on the negative voltage was analyzed.The results showed that the input voltage and the duty ratio variation affect only the negative voltage；energy storage inductor,duty ratio,load,filter capacitor affects not only the negative influence of the size,at the same time,the peak time of negative voltage.Modeling results provided a theoretical basis to reduce the negative voltage and improved the response speed of the non minimum phase system.
