This paper makes up a higher power factor controlling system of speed close loop, which is based on the SPWM techniques.
在变频调速的基础上，增加功率因数控制，形成一转速闭环的高功率因数异步电动机变频调速系统。
参考来源 - 高功率因数异步电动机变频调速系统·2,447,543篇论文数据，部分数据来源于NoteExpress
提出了模型跟踪2自由度转速闭环控制策略和基于观测器的车速估算方法。
The closed loop control strategy by model tracking2-freedom rotation speed and the sight-based velocity estimation method are introduced.
同时利用霍尔传感器将电机速度转换成脉冲频率反馈到单片机中，实现转速闭环控制，达到转速检测目的。
At the same time using Holzer sensors will be converted into pulse frequency motor speed feedback to the MCU, realize the speed closed-loop control, to achieve speed detection.
采用数字信号处理器（DSP）控制器，设计了具有电压前馈和电流截止负反馈的转速闭环弱磁调速系统。
The speed adjusting system with field weakening with voltage feedforward, current closed negative feedback and speed closed loop was designed by adopting digital signal processor (DSP).
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