This paper induces the lowest limit of frequency for variable-frequency adjustable speed and soft starting, gets the best starting frequency for soft starting.
本文推导出了变频调速及软起动的频率最低限，发现了软起动的最佳起动频率。
This paper induces the lowest limit of frequency for variable-frequency adjustable speed and soft starting, gets the best starting frequency for soft starting.
本文推导出了变频调速及软起动的频率最低限，发现了软起动的最佳起动频率。
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