Waveshare DDSM115 Direct Drive Servo Motor All-In-One Design is a high-reliability Servo Motor that integrates an outer rotor brushless motor, encoder, and driver into a compact unit. By adopting advanced direct drive technology, the DDSM115 Servo Motor eliminates the need for a reducer, reducing noise, cost, and mechanical inefficiency. With low-speed, high-torque performance, IP54 protection, and multiple feedback modes, the Waveshare DDSM115 is ideal for robotics, automation, and industrial applications requiring precision and durability. Features Direct Drive Servo Motor – No reducer, zero backlash, and near 100% drive efficiency. All-in-One Design – Integrated motor, encoder, and driver for compact structure and high reliability. Ultra-low noise – Noise level ≤50dB, suitable for quiet environments. High precision feedback – Position, speed, current, and error codes available via RS485 communication. Fast response – Direct drive ensures smooth torque and accurate positioning. Multiple operating modes – Current loop, position loop, and velocity loop supported. Safety features – Hall position detection, over-current protection, and electric brake support. IP54 protection – Dustproof and water-resistant for longer service life. Closed-loop control – Real-time feedback including temperature, velocity, and current. Specifications Specification Details Rated Voltage 18V DC (5S LiPo) Rated Speed 115 rpm No-load Speed 200 ±10 rpm Rated Torque 0.96 Nm Locked-rotor Torque 2.0 Nm Rated Current 1.25 ±0.05 A Locked-rotor Current ≤2.7 A No-load Current ≤0.25 A Encoder Resolution 4096 Rotor Inertia 1.67 kg·m² Torque Constant 0.75 Nm/A Speed Constant 11.1 rpm/V Phase Resistance 2.15 Ω Phase Inductance 3.6 mH Number of Pole Pairs 10 Noise Level ≤50 dB Mechanical Time Constant 30 ms Operating Temperature -20 ~ 45°C Protection Level IP54 Weight 765 ±15 g Application Home Robots – Quiet operation and precise control for domestic robotics. Industrial Robots – High torque and reliability for automation systems. Fitness Equipment – Smooth motion and durability for smart exercise machines. Food Delivery Robots – Compact design and IP54 protection for service robotics. Commercial Robotics – All-in-one integration reduces complexity and improves efficiency. Part List Dimensions Resources & Services WIKI: www.waveshare.com/wiki/DDSM115 More Detail Multiple Operating Modes The Waveshare DDSM115 Direct Drive Servo Motor All-In-One Design supports multiple operating modes including current loop, position loop, and velocity loop. This makes the DDSM115 Servo Motor highly versatile for robotics and automation projects. RS485 Communication Support Only one RS485 bus is required to achieve centralized control of multiple Waveshare DDSM115 Servo Motors, simplifying system design and ensuring reliable communication. Closed-loop Control with Multiple Feedback The Waveshare DDSM115 Servo Motor provides closed-loop control and multiple feedback options including temperature, position, velocity, and current. This ensures precise monitoring and stable performance. Temperature Feedback Position Feedback Speed Feedback Current Feedback Integrated Direct Drive Design The Waveshare DDSM115 Servo Motor features an integrated direct drive design, delivering smooth torque, steady speed, and accurate positioning without the need for an external reducer. This compact and highly integrated structure improves efficiency and reliability. Excellent Low-Speed Performance The DDSM115 Servo Motor achieves speeds as low as 1 RPM with torque up to 2.0Nm, making it suitable for precise robotics and automation tasks. Waterproof & Dustproof Protection With an IP54 protection rating, the Waveshare DDSM115 Servo Motor is safeguarded against dust and water jets, ensuring longer service life and reliable performance in demanding environments.
