Hitachi SJ300-EL is a variable speed drive specifically designed for elevator control requirements.

Features include:

Vector control with a pulse generator

Sigmoid acceleration/deceleration for each speed step

Gain adjustment for stopping/slow speed or high speed steady run means stable operation. The variable Automatic Speed Regulator is settable up to eight points.

Torque bias function provides a smooth ride.

Flexible brake control signal setting

Battery backup for power failure

Emergency control change from vector to SLV or V/f to continue operation