DELTA ECMA-E21315RS ECMA Series AC Servo Motor 1.5 kW

Product Overview

The ECMA-E21315RS (ECMAE21315RS) is a high-performance AC synchronous servo motor from Delta's premier ECMA series, engineered for precision motion control in heavy-duty industrial applications. Featuring a medium-high inertia design, this 1.5 kW motor is optimized for stability and control when driving loads with significant mass fluctuations, such as CNC milling heads, industrial robotic arms, and heavy-duty conveyor systems. Operating at a rated speed of 2000 r/min, the ECMA-E21315RS delivers consistent torque and rapid acceleration, significantly reducing cycle times and enhancing the overall throughput of automated production lines. Its robust construction and integrated oil seal make it an ideal choice for harsh manufacturing environments where reliability is a critical requirement.

Suffix Breakdown

The ECMA-E21315RS nomenclature dictates the specific hardware configuration as follows:

• ECM: Electrical Commutation Motor (Product Type).

• A: AC Servo Motor (Driving Type).

• E: Rated Voltage 220V / Rated Speed 2000 r/min.

• 2: Sensor Type (Standard incremental/absolute encoder configuration).

• 13: 130 mm Motor Frame Size.

• 15: 1.5 kW Rated Output Power.

• R: Standard configuration without brake, equipped with an oil seal and integrated screw holes for mounting.

• S: Standard Shaft Dimensions (consistent with the 130 mm frame series).

Technical Specifications

Technical FAQs

Is this motor suitable for applications requiring high-frequency start-stop cycles?

Yes. Due to its medium-high inertia rating (54.95 x 10-4 kg.m2), the motor provides excellent load-matching capabilities for high-inertia loads. This prevents overshoot and mechanical resonance during rapid deceleration and directional changes.

What is the purpose of the "R" suffix configuration (with oil seal)?

The integrated oil seal is designed to prevent the ingress of gear oil from an attached gearbox or cutting fluid from a machining center. This ensures the internal motor windings and encoder remain uncontaminated, extending the operational life of the unit in lubricated environments.

Can I use a 3.0 kW drive with this 1.5 kW motor?

The technical data specifies compatibility with a 3.0 kW servo drive. Using a higher-rated drive provides additional headroom for peak torque requirements during acceleration, provided the drive parameters are correctly calibrated to the motor's 1.5 kW thermal limits.

Engineering & Installation Guide

• Mechanical Alignment and Mounting: Ensure the 130 mm frame is mounted on a surface with high thermal conductivity to assist in heat dissipation. The shaft should be aligned with the load within a tolerance of 0.03 mm to prevent premature bearing wear and vibration. Use the integrated screw holes to secure the motor to the mounting bracket with the specified torque.

• Oil Seal Maintenance: While the "R" configuration includes an oil seal, avoid direct high-pressure jet cleaning of the shaft interface. Inspect the seal periodically for signs of leakage, especially when the motor is coupled with a liquid-lubricated planetary gearbox.

• Regenerative Braking Management: With a regenerative power (Eo) of 67.93 Joules, ensure the connected servo drive is equipped with a properly sized braking resistor if the application involves frequent deceleration from 3000 r/min to zero. This prevents DC bus overvoltage faults.