Product Description:

The MIV0202-1-B5 inverter unit is produced by Okuma and is part of the MIV Servo Drives series. Within an Okuma CNC cabinet, it occupies a drive rack slot and connects to the shared rectifier section through a DC link. The module transforms that link into controlled three-phase output for two independent servo channels, making it a central power interface for motion axes that require precise velocity, position, and torque regulation. Integration with encoder feedback and the system control board allows coordinated multi-axis motion without separate external drives. Because both servo channels are housed in one module, the rack can support paired axes while keeping power conversion and control functions centralized.

At the heart of the module is the inverter control board type ICB1, which handles pulse-width modulation, phase current detection, and fault management. Each channel is rated at 2.67 hp or 2.0 kW under nominal coolant flow and ambient temperature. When operated within those limits, a connected BL motor can reach its rated acceleration without triggering overcurrent trips. The control board also manages regenerative braking, so kinetic energy from decelerating axes is returned to the DC bus instead of being dissipated as heat. This arrangement lets the unit supervise output behavior on both channels and respond quickly to abnormal load conditions.

In two-axis machining centers, the separate DC bus sections isolate transient loads, letting a PREX motor on one half draw regenerative current without causing voltage sag at the companion channel. This arrangement preserves stiffness across the cabinet's dual-axis frame and helps minimize following error during rapid infeed changes. Vector tables are assigned individually for the L side, allowing proportional and integral gains on that path to be adjusted without affecting M-side dynamics. Independent parameter handling is useful when the two connected axes have different inertia or motion profiles. The split-channel layout also helps the cabinet maintain stable axis response during simultaneous motion.