What are the parameters of the frequency converter? Thank you
Some are called bias frequency or frequency offset settings. Its purpose is that when the frequency of external analog signals (voltage or current) to set, you can use this function to adjust the frequency setting signal, minimum output frequency, as shown in figure 1. Some of the inverter when the frequency setting signal is 0%, the error values in the range of 0 ~ Fmax, some converter (such as electricity forhomes Sanken) can also bias polarity settings. For example, in debugging, when the frequency setting signal is 0%, the output frequency of the inverter is not 0Hz, and xHz, then the bias frequency is set to negative xHz, so that the output frequency of the inverter is 0HzI
That is to say, the upper and lower amplitudes of the output frequency of the inverter. Frequency * * is to prevent misoperation or external frequency set signal source failure, resulting in the output frequency is too high or too low, in order to prevent damage to a device protection function. In the application, according to the actual situation can be set. This function can also be used as a speed limit, if the conveyor belt, the conveying material is not too much, to reduce the mechanical and wear belts, be driven by inverter, and the inverter upper frequency settings for a particular frequency, so it can make the belt conveyor running on a fixed low speed work
This function is to protect the motor overheating and set up, it is the frequency converter CPU, according to the operation current value and frequency to calculate the temperature rise of the motor, so as to overheat protection. This function is only suitable for "one on one" occasion, and when the "one is more than one", hot relays should be installed on each motor.Electronic thermal protection settings (%) n (A) / motor rated current rated inverter output current (A)] x 100%.
Also called torque compensation, in order to compensate for the motor stator winding resistance caused by low-speed torque reduction, and the low frequency range f/V increased method. When the utility model is set as an automatic, the voltage in the acceleration can be automatically raised to compensate the starting torque, and the motor can be accelerated smoothly. If manual compensation is adopted, according to the load characteristics, especially the starting characteristics of the load, the better curve can be selected through the test. For variable torque load, such as improper selection, the output voltage is too high at low speed, while the phenomenon of waste of electricity, and even the emergence of motor load with a large current, while the speed does not go.
Inverter function parameters are many, generally have ten, or even hundreds of parameters for users to choose. In practical applications, it is not necessary to set and debug each parameter, most of which can only be used as factory settings. But some parameters have great relationship with the actual use, and some are related to each other, so they should be set and debugged according to the actual situation.Because of the type of converter function are different, but the same function parameter name is not consistent, but the type of converter is almost always some basic parameters, can be done completely by analogy. The following parameters are basically used:
