PWM AC drive MVVFD

vector controlfor the cement industryindustry

STEP, a Chinese famous brand of MV VFD manufacture, has more than 25 years experience in this VFD field, provide the high quality products for different applications. With the advanced technology and strong R&D team, STEP have a very good reputation in the automation industry. STEP VFD ‘s high efficiency, energy saving, fast response, high reliability help customers realized their value in the automation of the variety of industries. Features and Advantages 1.Flexible terminal expansion without the need of PLC The flexible terminal configuration and expansion and the digial/agalog input/output terminal functions may be flexibly expanded as required by the user without the need of PLC programming. Only corresponding parameter functions shall be set. 2.Vector control Calculate the motor speed and achieve the AC motor decoupling control accordin to the motor speed detected by the encoder and combines with the software vector control algorithm. The control performance may be comparable with DC speed regulation system. Support constant power operation and support operation above base frequency (fluxweakening function). 3.High quality drive of motor Multi-level PWM control mode and sinusoidal current output. Common mode voltage and du/dt, no special requirement for motor and cable, frequency conversion renovation of old equipment without the need for motor replacement. 4.Low harmonic content  No additional output filtering device is required and the motor may not be subject to derating use to harmonics. Hamonic content <5%. No pulsating torque caused by harmonics. Prolong the service life of the motor and mechnical equipment