Therefore, it is impossible VVVF unrestricted speed.
因此，变频调速不可能无限制调速。
VVVF system controlled by 16-bit single chip is introduced.
介绍了一种基于16位单片机的变压变频VVVF系统。
In addition, the VVVF elevator is 40% more power saving than the traditional one.
另外，本设计采用交流调压调频调速与同规格的传统电梯相比，可节能40%。
NC machine speed adjustment, and more and more application of the VVVF technology to achieve.
数控机床的转速调整，目前越来越多地应用了变压变频技术来实现。
NC machine speed adjustment, and more and more application of the VVVF technology to achieve.
数控机床的转速调整，目前越来越多地应用了变压变频技术来实现。
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