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一般电机的组合是在60Hz以上也要求转矩一定?
通常情况下时不可以的。在60Hz以上(也有50Hz以上的模式)电压不变，大体为恒功率特性，在高速下要求相同转矩时11、所谓开环是什么意思?
Usually not. When the voltage is constant above 60Hz (there are also modes above 50Hz), it is generally a constant power characteristic. When the same torque is required at high speed, what does the so-called open-loop mean?
给所使用的电机装置设速度检出器(PG)，将实际转速反馈给控制装置进行控制的，称为“闭环 ”，不用PG运转的就叫作“开环”。通用变频器多为开环方式，也有的机种利用选件可进行PG反馈.无速度传感器闭环控制方式是根据建立的数学模型根据磁通推算电机的实际速度，相当于用一个虚拟的速度传感器形成闭环控制。
A speed detector (PG) is set for the motor device to be used. If the actual speed is fed back to the control device for control, it is called "closed loop". If the PG is not used, it is called "open loop". Most of the general frequency converters are open-loop, and some models can use options for PG feedback. The speed sensorless closed-loop control mode is to calculate the actual speed of the motor according to the established mathematical model, which is equivalent to using a virtual speed sensor to form a closed-loop control.
Usually not. When the voltage is constant above 60Hz (there are also modes above 50Hz), it is generally a constant power characteristic. When the same torque is required at high speed, what does the so-called open-loop mean?
给所使用的电机装置设速度检出器(PG)，将实际转速反馈给控制装置进行控制的，称为“闭环 ”，不用PG运转的就叫作“开环”。通用变频器多为开环方式，也有的机种利用选件可进行PG反馈.无速度传感器闭环控制方式是根据建立的数学模型根据磁通推算电机的实际速度，相当于用一个虚拟的速度传感器形成闭环控制。
A speed detector (PG) is set for the motor device to be used. If the actual speed is fed back to the control device for control, it is called "closed loop". If the PG is not used, it is called "open loop". Most of the general frequency converters are open-loop, and some models can use options for PG feedback. The speed sensorless closed-loop control mode is to calculate the actual speed of the motor according to the established mathematical model, which is equivalent to using a virtual speed sensor to form a closed-loop control.
