Orbray DC Coreless Motor Series CMS10-18 Overview

This document provides detailed technical specifications and mechanical data for the Orbray DC Coreless Motor Series CMS10-18, which features precious metal commutation and sintered sleeve bearings. The series includes models CMS10-1805, CMS10-1818, and CMS10-1834, designed for different nominal voltages and performance requirements.

1. Motor Specifications

• Nominal Voltage: 3.7 V (CMS10-1805), 7.4 V (CMS10-1818), 12.0 V (CMS10-1834)
• No Load Speed: 12,200 rpm, 14,600 rpm, 18,000 rpm respectively
• No Load Current: 19 mA, 12 mA, 9 mA respectively
• Stall Torque: 1.89 mNm, 1.91 mNm, 2.16 mNm respectively
• Stall Current: 689 mA, 418 mA, 357 mA respectively
• Maximum Output Power: 0.6 W, 0.7 W, 1.0 W respectively
• Maximum Efficiency: 69%, 69%, 71% respectively
• Terminal Resistance: 5.37 Ω, 17.72 Ω, 33.66 Ω respectively
• Rated Torque: 0.271 mNm, 0.273 mNm, 0.293 mNm respectively
• Rated Speed: 10,400 rpm, 12,500 rpm, 15,500 rpm respectively
• Rated Current: 116 mA, 70 mA, 56 mA respectively
• Friction Torque: 0.05 mNm (all models)
• Back-EMF Constant: 0.295, 0.492, 0.651 mV/rpm respectively
• Torque Constant: 2.82, 4.70, 6.22 mNm/A respectively
• Slope of N-T Curve: 6444, 7659, 8316 rpm/mNm respectively
• Mechanical Time Constant: 7.0 ms, 7.3 ms, 7.5 ms respectively
• Rotor Inertia: 0.10, 0.09, 0.09 g·cm² respectively
• Maximum Allowable Torque: 0.63 mNm, 0.64 mNm, 0.72 mNm respectively

2. Mechanical and Environmental Data

• Maximum Shaft Axial Load at Standstill: 78 N
• Bearing Type: Sintered sleeve bearing
• Dimensions: Provided in millimeters; includes gear options SPG10/SSG10 and encoder options ETD10-2C/2D/2E (refer to pages 34 and 35 for details)

3. Performance Curves

The document includes speed versus torque and speed versus current curves for each motor model at different voltages, illustrating motor behavior under load conditions. These curves help in understanding the operational limits and efficiency characteristics.

4. Additional Notes and Recommendations

• Specifications are subject to change without notice.
• Contact information for Orbray Co., Ltd. is provided for technical support and sales inquiries.

Summary

The CMS10-18 series coreless motors are compact, efficient, and designed for precision applications requiring low inertia and high responsiveness. Key parameters such as torque, speed, current, and efficiency are optimized across three voltage variants. The use of precious metal commutation and sintered sleeve bearings ensures durability and smooth operation. Detailed mechanical dimensions and accessory options (gears and encoders) support integration into various electromechanical systems.