Description

KOLLMORGEN PMA240‑1050B‑02 Platinum Frameless Brushless Servo Motor

Technical Specifications

• Part Number: PMA240‑1050B‑02
• Brand: Kollmorgen (Pacific Scientific)
• Warranty: One Year
• Type: Frameless permanent‑magnet synchronous brushless servo motor (stator + rotor kit, no housing / bearings)
• Stator Outer Diameter: 240 mm series
• Continuous Stall Torque: 68 Nm
• Peak Torque: 204 Nm
• Continuous RMS Current: 9.7 A
• Peak Current: 29.0 A
• Torque Constant Kt: 7.03 Nm/A (B‑02 winding variant)
• Voltage Constant Ke: 53.7 V/krpm (line‑line RMS)
• Rotor Inertia: 82 × 10⁻⁴ kg·m²
• Insulation Class: Class‑F (155 °C)
• Operating Temperature: 0 °C ~ +40 °C continuous; ‑20 °C ~ +70 °C storage
• Feedback: Matched resolver / high‑resolution encoder (customer mechanical integration)
• Protection: Winding thermal sensor embedded; no IP rating (frameless open‑construction, must be enclosed inside machine housing)
• Cooling: Forced air or liquid cooling dependent on machine assembly
• Dimensions: Stator OD 240 mm; weight approx 17‑20 kg

Product Overview

The PMA240‑1050B‑02 belongs to Kollmorgen Platinum PMA frameless servo‑motor series. It is a kit‑type frameless motor consisting of separate stator winding and permanent‑magnet rotor. The customer integrates stator and rotor directly into the machine mechanical structure, installing customer‑supplied bearings, housing and feedback devices. It delivers high‑torque compact direct‑drive performance for heavy‑duty closed‑loop position, speed and torque control.

This frameless motor addresses high‑torque direct‑drive challenges: compact mechanical integration into machine frames, elimination of gear‑box backlash, high torque density for heavy‑load axes, drop‑in spare compatibility for legacy PMA‑series retrofit‑maintenance projects. Motion‑control engineers, plant‑maintenance technicians and system‑retrofit integrators benefit most. Typical applications: heavy‑duty test‑benches, large‑format presses, rotary positioning tables, metallurgical machinery and special‑purpose industrial‑automation equipment.

Key Application Notes

• Frameless kit motor; cannot run standalone. Requires matched servo‑drive, customer‑provided mechanical housing, bearings, shaft‑system and feedback sensor assembly.
• Full part number defines winding configuration (‑B‑02); replacement spare must match full part number to avoid torque/current mismatch.
• Original OEM production is discontinued; widely‑used aftermarket surplus/refurbished spare part.
• Embedded thermal‑switch wiring must connect to servo‑drive thermal‑fault monitoring for winding over‑temperature protection.
• Mechanical installation demands precise air‑gap between stator and rotor; mis‑assembly will cause performance degradation or permanent magnet damage.
• Conformal‑coated winding variant available for high‑humidity, high‑contaminant cabinet‑enclosed environments.
• Commissioning must follow Kollmorgen PMA frameless‑motor manual for air‑gap tolerance, wiring and servo‑loop tuning.