Pacific Scientific P70360-SDN Brushless AC Servo Motor

The Pacific Scientific P70360-SDN is a high-performance brushless AC servo motor from the renowned Pacific Scientific P700 and N700 series, now part of OMNI by MOOG through corporate acquisitions. This motor is engineered for demanding industrial motion control applications that require precise speed and torque regulation, high dynamic response, and exceptional reliability. As part of the SDN product line, it incorporates an integrated non-contact feedback device, most commonly a high-resolution sin/cos encoder or a digital encoder such as EnDat or Hiperface, directly embedded within the motor housing.

Technical Specifications

The P70360-SDN features a frame size likely corresponding to NEMA 34, approximately 86mm square flange, or a metric 90mm frame equivalent. The 360 designation indicates a specific stack length variant that influences continuous torque output. Continuous torque is dependent on the exact variant and winding configuration, with peak torque typically reaching 2 to 3 times the continuous torque value. Rated speed is standard high-speed design, often 3000 RPM or 5000 RPM at rated voltage. The voltage constant, representing back-EMF, is typically in the range of 30 to 50 V per kRPM, critical for drive sizing. The torque constant typically ranges from 0.5 to 1.2 Nm per amp, defining torque output per ampere of current. Rotor inertia is low, enabling high acceleration and deceleration rates.

Motor Design Features

The P70360-SDN is characterized by its specific electromechanical design, where 70 likely denotes the motor frame size and 360 indicates the stack length or a key performance variant. This brushless design eliminates the wear and maintenance associated with brushed motors, while the rare-earth permanent magnet rotor delivers high torque density and efficiency. The integrated feedback device provides the servo drive with accurate rotor position and velocity information for closed-loop control, enabling precise motion profiles and positioning accuracy.

System Integration

When paired with a compatible Pacific Scientific or OMNI servo drive such as the PC or SC7 series and properly tuned, this motor forms the heart of high-performance motion systems. The SDN designation within the product line indicates the specific feedback device type and connector configuration. The motor is designed for industrial environments with resistance to dust, vibration, and temperature fluctuations, ensuring reliable operation in demanding factory automation settings.

Applications

The Pacific Scientific P70360-SDN brushless servo motor is deployed in precision motion control applications requiring high dynamic response and reliability. Typical applications include precision manufacturing equipment for CNC machining and milling, packaging machinery requiring precise indexing and registration, robotics for articulated arm and Cartesian gantry systems, and semiconductor fabrication equipment where positioning accuracy is critical. The motor is also used in medical device manufacturing, printing and converting equipment, and any application where brushless servo technology provides the precision, torque density, and maintenance-free operation required for demanding industrial automation.