Orbray DC Brushless Motor Series for RC and Robotics (BRS/BRT 12-15)

Overview

This document provides detailed specifications and mechanical data for Orbray's BRS/BRT 12-15 series brushless DC motors, designed primarily for remote control (RC) and robotic applications. The motors include built-in Hall sensors and use sintered sleeve bearings.

Key Specifications

• Nominal Voltage: 7.4 V
• No Load Speed: Approximately 35,500 to 40,000 rpm depending on model
• No Load Current: Ranges from 143 mA to 178 mA
• Stall Torque: Between 2.82 mNm and 7.68 mNm
• Stall Current: 4.32 A to 7.4 A
• Maximum Output Power: 4.7 W to 7.4 W
• Maximum Efficiency: Around 60% to 63%
• Terminal Resistance: Approximately 1.71 to 2.62 ohms
• Friction Torque: 0.27 to 0.33 mNm
• Back-EMF Constant: ~0.198 mV/rpm
• Torque Constant: ~0.194 mNm/A
• Slope of Speed-Torque Curve: ~1.85 to 1.89 rpm/mNm
• Mechanical Time Constant: 4759 to 6990 ms

Mechanical Data

• Shaft Axial Play: 0.03 to 0.3 mm
• Shaft Runout: 0.05 mm
• Operating Temperature Range: -10°C to +50°C
• Maximum Coil Temperature: 80°C
• Bearing Type: Sintered sleeve bearing
• Weight: Approximately 10 grams

Additional Notes

• Reduction gears cannot be attached to these motor models.
• Pin configuration includes Hall sensor outputs (U, V, W), motor windings (U, V, W), power supply (Vdd), and ground (Gnd).
• Hall sensor input signal voltage range: 3.0 V to 5.0 V.
• Specifications are subject to change without notice.

Contact Information

Orbray Co., Ltd.
3-8-22 Shinden, Adachi-ku, Tokyo 123-8511, Japan
Tel: +81-3-5390-7620
Website: https://orbray.com/en/
Email: [email protected]