.5 Kw Three-phase Inverter Main Circuit Design

There are many years from the power inverter have already appeared to the development. Its applications now are much more than only met the emergency equipment. It is used in many areas such as energy saving, VWF, the improvement of power supply quality and so on. With the development of power electronic devices, the trend of the power inverter is higher voltage, big power and lower loss. For some R & D staff, there task is to design excellent power supply with the power module. The abroad compared us to lead almost a decade in this aspect. If we want to catch up with, first we have to know well its design way of thinking, the principle of the circuit. Then we have the possibility to improve the circuit in order to attain a creative purpose.This article analyzed each component in detail of the main circuit of power supply. The hardware making and test were finished in Infineon Company. The whole design will be recommend to the customer as the evaluate board. It could help customers to design the project in less time, less cost but high effective.The article introduced the physical structure and electric properties of the power module. Then in consideration of cost, compatibility and actual factor of etc., the design was born. Several waveforms such as soft start, gate drive signal and so on. Especially, more focuses were taken on the gate signal because the switch loss is one of the main losses for the power inverter. So, it is necessary to study the switch exhaust of the main electric circuit. In the document, there raised a method for choosing the equal resistance.This text provided more system and more complete way of thinking for those who want to make the main electric circuit of power inverter. More discussion and research about how to reduce the loss should be made in the future.