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针对高耗、低效的矿井通风机节能改造问题，将晶闸管串级调速技术应用于矿井通风机的电控系统，使改造后的通风机年节电１００ 万ｋ Ｗ·ｈ 以上。
In order to solve the energy-saving problem of high-efficiency and low-efficiency mine ventilators, the thyristor cascade speed control technology is applied to the electric control system of mine ventilator, saving more than 1 million kilowatts of energy per year.