What is the three-phase inverter power supply? How to choose the three-phase inverter power supply? What are the characteristics of three-phase inverter power supply?

What is the three-phase inverter power supply: 380V three-phase input three-phase inverter 380V output double AC-DC-AC transform after called three-phase inverter power supply. It is different from that used for variable frequency speed controller used to control the motor speed, but also different from the ordinary AC regulated power supply. The main function of the power inverter is to transform the existing AC power current into the desired frequency stability of the pure sine wave power. The characteristics of the ideal AC power frequency stability, voltage stability, resistance equal to zero, the voltage waveform is a pure sine wave (distortion free). Variable frequency power supply is very close to the ideal AC power supply. Therefore, more and more advanced and developed countries will frequency power as a standard power supply, to appliances provide most excellent power supply environment, to facilitate an objective assessment by the technical performance of electrical appliances.

How to choose the correct selection of three-phase inverter power: three-phase inverter power supply is essential for the normal operation of electric control system of mechanical equipment. Selection of three-phase inverter power supply, first of all to according to the type of machinery and equipment, load torque characteristics, speed range, the accuracy of the static speed, starting torque and the use of environmental requirements, and decide how to choose control ways and protective structure of variable frequency power supply the most appropriate. The combination is in the production of machinery and equipment meet the requirement of practical process and applications of the premise, to achieve the best cost-effective application of variable frequency power supply.

According to the load characteristics to select the appropriate control of three-phase inverter power supply, now on the market sell a wide variety of three-phase inverter power supply, function is powerful, the performance of variable frequency power supply is increasingly becoming the determinants of speed control performance of the pros and cons of, in addition to the three-phase inverter power supply itself of manufacturing process of the "innate" conditions, the three-phase inverter power supply using what kind of control method is also very important. The following table summarizes the characteristics of all kinds of variable frequency power supply control mode in recent years.

What are the characteristics of three-phase inverter power: three-phase inverter power supply characteristics:

1 high frequency MPWM design, IGBT power drive, small size, high reliability, low noise.

2 the efficiency of more than 85%

The 3 reaction is fast, and the reaction time is less than 2ms, and the reaction time is less than.

4 overload ability, instantaneous current can withstand the rated current of 300%

5 wave crest factor ratio (FACTOR RATIO CREST) is higher than 3:1.

6 overvoltage, over current, over temperature, multiple protection and alarm device