Product Description:

The MIV15-3-V3 inverter unit is manufactured by Okuma and belongs to the MIV Servo Drives series. As an inverter unit, it converts shared DC bus energy into variable-frequency three-phase power for a VAC motor that drives a single machine-tool axis. Within an automation cell, the module supplies torque regulation, regenerative braking, and fault reporting while communicating with the CNC. By translating digital motion commands into finely modulated current, it enables smooth interpolation and repeatable tool paths on lathes, mills, and grinders.

It is built to manage a single mechanical axis, as indicated by its 1-axis designation, meaning one independent servo channel is available for position and velocity loops. Control electronics remain active from an auxiliary 24 VDC supply, allowing parameter retention and alarm monitoring even when the main power is off. The switching stage draws from a stabilized link of 300 VDC; this voltage gives the IGBT bridge the headroom needed for field-oriented control across the full speed range. Continuous output capability reaches 15 kW (20 hp), so the drive can feed medium-frame spindles or feed motors without thermal derating under constant duty. Pulse generation, feedback conversion, and protective shutdowns are supervised by the ICB3 inverter control board installed in this model.

The enclosure weighs 11.2 kg (24.6 lb), which supports straightforward cabinet integration. Its footprint measures 150 mm in width and 325 mm in depth, while an overall height of 380 mm aligns with standard rack clearances. The First Generation version is compatible with the earliest MIV architecture, so bus bars, resolver feedback, and parameter files match existing installations. Xt1 M6 and Xt2 M8 screw terminals secure the DC link and motor leads, and VAC motor support allows the same resolver and thermal sensor wiring used across the series.