MIV0105A-1-B5 Okuma
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The Okuma MIV0105A-1-B5 is an inverter unit from the MIV Servo Drives series designed to control two axes. It has a control power of 24 VDC and a DC bus supply of 300 VDC, with an L side capacity of 1.33 hp. The unit measures 380 mm in height, 100 mm in width, 295 mm in depth, and weighs 6.5 kg.
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Product Description:
The MIV0105A-1-B5 is an inverter unit supplied by Okuma under the MIV Servo Drives series. It occupies the power-conversion slot in an Okuma CNC rack, processing DC-link energy and generating a modulated three-phase output for servo motors connected to cutting, feed, or spindle axes. By translating numerical control commands into precise current vectors and monitoring resolver or encoder feedback, the drive supports closed-loop positioning, velocity regulation, and fault protection in automated machining cells. Integrated gate drivers and regenerative circuitry are housed in a single chassis, keeping cabinet wiring straightforward and consistent across identical machine builds.
Internal logic is energized by a control supply of 24 VDC, which keeps signal processing active when the main bus is de-energized for maintenance. The drive can coordinate 2 independent motor channels, allowing simultaneous interpolation of two axes from a single unit. Traction energy is drawn from a shared bus maintained at 300 VDC, giving the IGBT stage the voltage headroom needed to achieve rated motor speeds under load. Power on the left output connector is rated at 1.0 kW (1.33 hp). This rating indicates the maximum continuous mechanical power available to an individual axis without exceeding the thermal limits of the module or motor windings.
The chassis has a depth of 295 mm, a height of 380 mm, and a width of 100 mm, supporting high-density cabinet layouts. Multiple inverter units can be mounted side by side on a standard backplate without obstructing the airflow channels needed for cooling. The assembled package weighs 6.5 kg, keeping the mounting load manageable while providing sufficient mass for effective heat dissipation. A ventilated front panel provides access to status LEDs and fuses, allowing routine service without disturbing adjacent motion modules. The narrow enclosure also preserves space for cable routing and other rack components within the control cabinet.
