Is my company with frequency converter for host and multi-functional controller supporting a fully automatic frequency control of motor speed system, power from 0.37 KW to 315 KW. The system can automatically control motor cycle soft start soft stop variable frequency variable speed, especially suitable for the following situations: 1, high precision stepless speed regulation; 2, energy saving system (especially the fan and pump class load); 3, to start and slow stop demanding situations, can according to load condition and reasonable choice of time. 4, special process requirements of the plant speed control system.