New Product: Large-Capacity Ac Drives

    Feb. 21, 2008
    The SJ700 Series ac drives handle 250, 400, and 500-hp ranges. An improved Sensorless Vector control algorithm lets the drives develop 150% starting torque at 0.3 Hz.

    For verticallift applications, the SJ700’s 0 Hz Domain open-loop control mode develops 130% torque at 0 Hz. Additional features include Micro Surge Voltage suppression (protects motor-winding insulation), advance trip-avoidance functions, configurable sink/ source logic on I/O, built-in RS-485 Modbus/RTU communication, and options for other communications networks. The SJ700 can be configured using a front-mounted keypad.

    Hitachi America Ltd., Industrial Systems Div.,
    50 Prospect Ave., Tarrytown, NY 10591,
    (914) 631-0600,
    hitachi.us

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    A look into the latest improvements in motion control through high-performance drives, AI enhancements, and faster communication protocols.

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