BL-MH201E-20T Okuma
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The Okuma BL-MH201E-20T is a 3-phase servo motor from the BL Servo Motors series with a rated output of 4.0 kW and a rated speed of 2000 RPM. It uses a natural cooling method, has a flange mount design, and operates at a rated voltage of 159 VAC. This motor features a rated current of 15.7 Arms and a current limit of 62.5 A, with a servo drive capacity of 75 A.
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Product Description:
The BL-MH201E-20T is an Okuma servo motor listed in the BL Servo Motors series. It converts electrical power into regulated torque and speed so that cutting heads, tables, or loaders follow programmed paths with micron-level repeatability. Integration with Okuma servo amplifiers allows the motor to receive real-time current commands while its feedback device reports position, creating a motion element suited for industrial automation lines that demand precise interpolation.
At continuous load, the unit provides 4.0 kW of mechanical power while maintaining a shaft velocity of 2000 rpm. This output requires a line current of 15.7 A RMS, and the controller limits fault energy by capping the instantaneous phase current at 62.5 A. Windings rated for 159 VAC ensure the electromagnetic field can be established without excessive insulation stress. Natural convection removes generated heat, so no external fans are fitted. A rigid flange interface positions the housing accurately against gearboxes or linear modules. The balanced three-phase design permits vector control that reduces torque ripple during low-speed contouring.
The electromagnetic assembly includes a 6-pole rotor, providing narrow electrical spacing between poles and enabling a rapid torque response. An electrical frequency of 100 Hz matches the winding layout, providing synchronous operation under field-oriented control. Copper resistance measured at 68 °F is 0.38 Ω; this modest impedance minimizes loss and accelerates current rise when the drive issues a step change. Okuma pairs this motor with a 75D amplifier stage capable of supplying up to 75 A, so reserve current is available for acceleration bursts, tap reversal, or rapid indexing moves in multi-axis equipment. The sealed stator supports installation in environments where airborne coolant mist or metallic dust may be present.
