DELTA ECMA-E21320SS AC Servo Motor E Series

Product Overview

The ECMA-E21320SS (ECMAE21320SS) is a high-torque AC servo motor from the Delta E series, engineered for high-precision industrial motion control. Delivering a rated power of 2.0 kW and a substantial rated torque of 9.55 N-m, this motor is specifically designed for applications where high inertia and precise speed regulation are mandatory. Typical use cases include heavy-duty pick-and-place robotics, industrial machinery, and precision manufacturing systems. Its robust design minimizes mechanical latency—featuring a mechanical time constant of just 0.96 ms—ensuring rapid response times and superior performance in high-frequency duty cycles, which helps maintain maximum production uptime.

Technical Configuration

The ECMA-E21320SS architecture is built for sustained reliability under demanding electrical loads. With a rated speed of 2000 r/min and a maximum peak speed of 3000 r/min, it offers an excellent balance between high-speed performance and torque stability. The unit is designed with an insulation resistance exceeding 100 M-ohm at 500 VDC, ensuring long-term operational integrity even in environments subject to thermal fluctuations. The high rated current of 33.03 A is managed through optimized winding geometry, allowing for efficient energy conversion and a peak torque output of 28.65 N-m for short-duration acceleration tasks.

Technical Specifications

Frequently Asked Questions

What is the significance of the mechanical time constant in this motor?

The mechanical time constant of 0.96 ms indicates how quickly the motor reaches 63.2% of its rated speed from a standstill. A lower value, such as this, confirms the motor's high dynamic response capability, which is critical for systems requiring rapid acceleration and short settling times.

Is the ECMA-E21320SS suitable for high-humidity environments?

While the motor is built for general industrial use, it is not fully sealed against liquid immersion. It should be operated within a standard industrial climate-controlled environment (humidity <90%, non-condensing). If the environment exceeds these limits, additional external protective shrouding is required.

How does the peak torque of 28.65 N-m affect duty cycle planning?

The peak torque is available only for transient operations (acceleration/deceleration). Continuous operation at peak torque will lead to thermal overload and potential winding damage. Ensure that your application's RMS torque requirement remains within the rated 9.55 N-m for long-term reliability.

Engineering and Installation Guidelines

• Mounting Precision: Due to the high torque rating of 9.55 N-m, ensure the motor is mounted to a vibration-dampened, rigid baseplate. Any mechanical misalignment between the motor shaft and the load will result in increased bearing stress and reduced encoder accuracy.
• Thermal Dissipation: Even with efficient internal design, the motor relies on ambient air circulation. Ensure a minimum clearance of 100 mm from other heat-generating equipment. Do not paint the motor housing or cover the cooling fins, as this inhibits the heat transfer necessary to maintain the insulation integrity.
• Electrical Interfacing: Use high-quality, braided shielded cables for power and encoder feedback. The 33.03 A rated current requires a cable cross-section sufficient to prevent voltage drops; verify that the impedance of the power lines is as low as possible to maintain full torque control stability.