The paper presents a SPWM frequency variable and velocity variable system with SCR as main switching devices. The proposed scheme has been verified through experiment.
介绍一种以SCR作主开关器件的SPWM控制方式的变频调速系统，并通过实验对提出的方案进行了验证。
In this issue, a device of variable velocity variable frequency on medium-high voltage three-level is developed to reduce energy consumption and improve the cost-effective for the previous problems.
针对这些问题，本课题研究开发了一种中高压三电平变频调速装置，降低电机的能耗、提高系统的性价比。
In this issue, a device of variable velocity variable frequency on medium-high voltage three-level is developed to reduce energy consumption and improve the cost-effective for the previous problems.
针对这些问题，本课题研究开发了一种中高压三电平变频调速装置，降低电机的能耗、提高系统的性价比。
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