高速纺丝机用的可控硅变频电源对频率精度要求较高,而频率精度是由脉冲振荡器决定的。本文介绍的多谐振荡器具有结构简单、频率精度高和稳定性好等优点。实用表明已能满足高速纺丝机对电源频率精度的要求:当电网电压波动±10%,室温有±10℃变化(室温25℃)时,频率变化不超过0.3%。 High-speed spinning machine with SCR variable frequency power supply on the higher accuracy, and the frequency accuracy is determined by the pulse oscillator. This article describes the multivibrator has the advantages of simple structure, high frequency accuracy and good stability. Practical shows that it has been able to meet the high-speed spinning machine frequency accuracy of the power requirements: When the grid voltage fluctuations of ± 10%, room temperature ± 10 ℃ changes (room temperature 25 ℃), the frequency change does not exceed 0.3%.