The all-digital ac frequency conversion control system based on the common DC bus can meet the requirements of high speed and high reliable control performance of the high-speed paper machine.
这种基于公共直流母线的全数字交流变频控制系统适用于高速纸机的高速度、高可靠性控制性能的需要。
Through application of frequency converter in constant pressure water supply system, the paper describes the economic feature and advantages of adopting AC frequency conversion speed control method.
通过变频器在恒压供水系统中的应用，阐述了采用交流变频调速控制方案的经济性和优越性。
The AC servo system of FANUC 11 series is a AC-DC-AC conversion frequency speed adjusting system, which use PWM as the speed-adjusting control method.
FANUC一11型交一直一交频调速系统，调速的控制方法为脉冲宽度调制(pwm)法。
Based on the study of ac frequency conversion power system, research is made on how to control and reduce drilling accidents in working procedure. An effective new way to safe drilling is provided.
摘要在对钻机交流变频调速动力系统的研究基础上，对该动力系统在钻探过程中如何控制和减少钻探事故的发生方面做了些探索，为安全钻探提供了一条有效的新途径。
Based on the study of ac frequency conversion power system, research is made on how to control and reduce drilling accidents in working procedure. An effective new way to safe drilling is provided.
摘要在对钻机交流变频调速动力系统的研究基础上，对该动力系统在钻探过程中如何控制和减少钻探事故的发生方面做了些探索，为安全钻探提供了一条有效的新途径。
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