Hitachi SJ700D AC Drives incorporate a three-drives-in-one design philosophy. The design provides Simple V/F (Volts-per Hertz) Constant Torque (CT) mode, Sensorless Vector (SLV) mode, and Closed-Loop Vector (CLV) mode. Switch to SLV control by simply changing a parameter value. SLV control offers 200% stating torque at 0.3 Hz and ±0.5% speed regulation.
Closed-Loop Vector (CLV) control is available by installing a low-cost encoder feedback card and changing a parameter value. Of course, the motor must be equipped with a suitable encoder. CLV control dramatically improves performance. CLV control offers full rated torque down to zero speed and 200% starting torque at 0.0 Hz.
SJ700D AC drives are available from ½ to 75 HP, 200-240V and from 1 to 550 HP, 380-480V. All SJ700D AC drives are suitable for 50 Hz or 60 Hz input.
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