Product Description:

The MIV0404-1-B3 is an inverter module produced by Okuma for the MIV Servo Drives series. It converts fixed DC bus energy inside a machining center control cabinet into variable three-phase output for two servo axes. The device works with BL and PREX brushless motors, letting the controller command precise speed and position changes without mechanical delays. By combining gate drivers, protection, and diagnostic circuits in one enclosure, the unit supports reliable motion in lathes, mills, and gantry robots.

The inverter operates from a shared link rated at 300 VDC, and its dual outputs are each sized for 4.0 kW × 4.0 kW thermal capacity. Pulse-width switching is handled by the ICB1 control board, which mounts directly on the power stage to maintain tight current loops for smooth torque. Low-power interfaces are isolated and powered by 24 VDC, keeping control electronics separate from the main bus. Because the hardware is arranged as a 2-axis package, the cabinet can drive paired linear or rotary slides while minimizing footprint. The power level suits mid-range machining applications where rapid acceleration and deceleration cycles dominate the duty profile.

Front-panel diagnostics rely on a 2 × 7-segment LED display that indicates alarm codes, operating states, and basic parameter values at startup. In customary units, each channel can deliver 5.3 hp × 5.3 hp, matching the kilowatt rating shown earlier. The aluminum housing stands 380 mm tall, extends 325 mm deep, and presents a narrow 100 mm front face so multiple drives can be stacked side by side. With a mass of 7.8 kg, the module remains compact while still providing enough material to help dissipate heat from the insulated-gate power devices.