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从理论与实际相结合的角度论述了湖南黄沙坪铅锌矿55 kW 砂泵电动机变频器调速低限频率由6 Hz 提高到18 Hz 、同时又适当增大变频器输出电压最大整定值U m 的原因。介绍了采用变频器后取得的经济效益。
From the point of view of theory and practice, it discusses that the lower frequency limit of frequency control of 55 kW sand pump in Huangshaping lead-zinc mine in Hunan is increased from 6 Hz to 18 Hz, and the maximum output voltage U m s reason. Introduced the use of frequency converter obtained after the economic benefits.