Recently, the professional book ‘motor control and transmission ‘ which is issued by mechanical industry publishing house (ISBN 978-7-11 135866-4) , edited by industry experts YangDeYin who is the expert in the motor control field. Powtran inverter and servo drive which is on the front page of this book , which will have good effect of the advertisement of Powtran products . At the same time, there is detailed explanations of Powtran inverter’s performance and technical parameters in the book.