The sea was very rough in the straits , full of eddies formed by the counter currents , and the chopping waves broke her course , whilst it became very difficult to stand on deck
2.
This paper presents a method that chopping wave is done by switch devices which consist of three - level resistance regulating module and intelligence power module ipm , and which realizes constant - current discharge of storage battery . to achieve the intelligence control of the drive protection and the discharge process of ipm , the paper designs circuit formed by igbt threshold drive pulse pwm signals . ipm fault - blocking protection circuit and microcomputer 80c196 . the devices can accurately control the 0 ~ 150a discharge current and the discharge time of the storage battery and calculate the releasing power
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