Frequency control is to change the frequency of the motor stator power, thereby changing the synchronous speed speed control method. The main equipment of frequency conversion speed regulation system is to provide frequency conversion power inverter , inverter can be divided into AC - DC - AC inverter and AC - AC inverter two categories, most of the current use of AC - DC - AC inverter. Its features: High efficiency, speed control process without additional loss; Wide range of applications, can be used for cage induction motor; Speed ​​range, features hard, high precision; Complex technology, high cost, maintenance and repair difficulties; This method is suitable for demanding high-precision, high speed performance occasions. Automatic Paired Slitting Machine Automatic Paired Slitting Machine,Paper Slitting Machine,Sheet Metal Slitter,Slitter Rewinder Machine HESHAN CITY HONGFA COMPLETE SOLUTIONS MACHINE LTD. , https://www.hshongfamachine.com