How to choose the frequency converter
1. Study the type specifications and main parameters of the frequency converter
A. inverter is the maximum power when the inverter runs, and sometimes the number of converters is increased according to the load and the use environment.
B. rated current: the maximum working current when the inverter runs, and the current of the inverter must be greater than the rated current of the motor.
C. inverter rated voltage: 220V, 380V, 660V, 690V, etc.
D. inverter overload capacity: fan, water pump inverter overload 120%, universal overload 150%;
2. reasonable selection of load types according to load power
Generally speaking, the fountain is used by the fan and the pump, for the most common load, the demand for the frequency converter is the most simple, as long as the capacity of the frequency converter is equal to the capacity of the motor (the fast changing music fountain needs to increase the capacity).
3. reasonable selection according to the use environment
The cause of the bad frequency converter has a great relationship with the use environment. Other environment is not narrated. According to the fountain and swimming pool industry, it is mainly dew, moisture and dampness.
A. causes discoloration due to humidity and leads to poor contact.
B. causes fire strike between PCB and PCB due to moisture.
C. triggers the internal resistance of the inverter to cause electrical corrosion.
4. other factors
Do not just look at the price. Some inverters are low in price, but poor in quality and performance, cheat in work and cut down on materials, short life, few accessories and hard maintenance. If your frequency converter is a large amount, it is better to prepare more than two sets spare; if your inverter is used in simple speed control, please choose a cheaper economy type.
Finally to say, if you want to make your controller yourself but you dont have enough skills and experience, the better you can ask us to choose the suitable model and ask the lience electrical man to help you.
