Characteristics of three-phase high-power variable frequency power supply
　　Description of three-phase output characteristics of variable frequency power supply:
　　1.The variable frequency power supply can output a three-phase four wire symmetrical power supply or a single-phase power supply.
　　2.The output characteristics of a variable frequency power supply should not be affected by the inductive or capacitive nature of the supplied load.
　　3.When the variable frequency power supply outputs at non power frequency frequencies,it is necessary to ensure that the external power supply load can output voltage and current signals at non power frequency frequencies normally when reverse current is 50HZ/20A per phase to the output end of the power supply.Do you know why we always require customers to reserve margin when choosing a variable frequency power supply,whether it is high-power or single-phase?
　　Because variable frequency power supplies have to withstand the surge impact of mains power and the starting impact of inductive loads in practical work(such as equipment such as refrigerators,air conditioners,and electric motors).When using variable frequency power supplies in inductive loads,due to the large instantaneous starting current of inductive loads,which is generally about 3-5 times the rated current,it often exceeds 9 times the operating current(such as refrigerators,air conditioners,washing machines,fans,large air conditioners,elevators,etc.).Therefore,as long as it is equipped with inductive loads such as electric motors,compressors,and electrical appliances,our engineers at Zhonggang Yangsheng always remind customers to consider power reserves and leave a margin to avoid the impact current generated when the load starts causing immediate damage to the variable frequency power supply.If the entire factory uses a variable frequency power supply and needs to be started simultaneously,there should be 1.5 times the reserved capacity,and the reserved capacity for single machine matching should be 3 times.