MIV03-1-B5 Okuma
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The Okuma MIV03-1-B5 is an inverter unit from the MIV Servo Drives series. It supports a single axis and uses a 24 VDC control supply with a 300 VDC DC bus supply. The drive's L side capacity is 4 hp or 3.0 kW, and it weighs 5.7 kilograms with dimensions of 60 mm width, 380 mm height, and 325 mm depth.
Internal Product Review
The MIV03-1-B5 is an Okuma inverter unit designed for single-axis servo drive service with a 24 VDC control supply. A 300 VDC DC bus supply paired with 3.0 kW capacity supports stable power conversion and dependable machine response. The 1562 min-1/V speed monitor scale adds useful diagnostic precision, making the unit a strong fit for disciplined motion control.
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Product Description:
The MIV03-1-B5 is an Okuma inverter unit that belongs to the MIV Servo Drives series and is manufactured for single-axis motion control in machine-tool and general automation cells. As an inverter section, it converts the plant’s DC-link energy into regulated three-phase output for a connected servo motor while forwarding speed feedback to the CNC. Its 5-bit controller ID switch lets the drive be uniquely addressed on a multi-drive backplane. The 24 V auxiliary logic rail keeps internal control circuits active during emergency stop conditions so parameters and alarms remain available to the supervisory PLC.
This model governs exactly 1 axis and draws power for its control electronics from a dedicated 24 VDC supply. The power section is energized by a shared DC bus rated at 300 VDC, allowing energy exchange with neighboring inverters during regenerative braking. The left-hand power module supports a continuous output of 3.0 kW, which is equal to 4 hp, for medium-frame servo motors used on feed screws and rotary tables. A built-in tachometer interface scales the returned voltage at 1562 rpm/V, giving the CNC a direct correlation between analog feedback and motor speed. Vertical clearance inside the cabinet is influenced by a housing height of 380 mm. Forced-air passages run the entire length of the housing to move heat away from the IGBT stack without additional ductwork.
The front face measures only 60 mm wide, allowing efficient use of available rack space in a densely populated control cabinet. The enclosure has a depth of 325 mm to accommodate the DC-link capacitors and gate-drive boards. Installation weight is kept to 5.7 kg, so the unit can be mounted on light-gauge DIN rails or slide-out trays without reinforcing the frame. Its narrow face also leaves more horizontal space for neighboring drive modules, power connections, and control wiring within the same enclosure.
