60HZ motor is used on 50HZ power supply, what should you pay attention to?
This is because the current frequency of the motor is lower than the design frequency, and the no-load counter electromotive force generated in the rotation is reduced, the no-load current is increased, and the motor is damaged, so that the no-load voltage is required to be lowered.
In the variable frequency speed control technology, the frequency of the motor and the stator voltage are simultaneously changed. That is, the frequency is reduced, the voltage is also reduced at the same time, and the motor will not over-current, and the ideal operation effect will be obtained.
Why should the output reactor be added with an output reactor? What is its function?
The output reactor is added to the output of the inverter to increase the distance between the inverter and the motor. The output reactor can effectively suppress the instantaneous high voltage generated by the IGBT switch of the inverter and reduce the adverse effect of this voltage on the cable insulation and the motor.
The main function of the reactor is to limit the capacitive charging current of the motor connection cable and limit the voltage rise rate on the motor winding to 540V/μs. It is also used to passivate the inverter output voltage (switching frequency) steeply. Degree, reducing the disturbance and impact of power components (such as IGBT) in the inverter.
Can the AC servo motor be controlled by a frequency converter?
Because the inverter and servo are different in performance and function, the application is not the same, so it is not acceptable.
In the case of speed control and torque control, the general frequency converter is not very high, and the position feedback signal is added in the upper position to form a closed loop frequency conversion for position control, and the accuracy and response are not high. Some existing frequency conversions also accept the pulse sequence signal to control the speed, but it seems that the position cannot be directly controlled.
In the case of strict position control requirements, only servo can be used, and the servo response speed is much larger than the frequency conversion. Some speed control and high response requirements also use servo control, which can be controlled by frequency conversion. The occasion can almost be replaced by a servo.
The key is two points: First, the price servo is much higher than the frequency conversion, and the second is the reason of the power: the maximum frequency conversion can be several hundred KW, or even higher, and the servo is up to several tens of KW. The basic concept of servo is accurate, accurate and fast positioning. Frequency conversion is a necessary internal link of servo control, and there is also frequency conversion in the servo drive (to carry out stepless speed regulation).
