050 Micro DC Motor 3V-7V High Speed for Shaver & Smart Home

Design & Integration Guide: 050SAV Series DC Motor

When integrating the 050SAV precious metal-brush motor into your system design—such as personal care devices, security locks, or beauty equipment—please refer to the following technical parameters to ensure system reliability and peak efficiency.

1. Power Management & Start-up Load

The 050SAV series exhibits a start-up (stall) current significantly higher than its steady-state operating current.

• Peak Current Management: Design your power stage to handle "Stall Current" requirements. For instance, the 2.5V model (1479) requires 0.93A, while the 7.0V model (11115) reaches 1.13A.

• Voltage Range Compliance: Ensure the power supply remains within the "Operating Range" (e.g., 2.0V–4.0V for the 2.5V nominal model) to avoid start-up failure or winding damage.

• Design Tip: To mitigate voltage sag during start-up, place a bulk capacitor near the motor driver and select MOSFETs capable of sustaining at least 1.5A of instantaneous current.

2. Mechanical Transmission & Torque Optimization

These motors are high-speed, low-torque components typically requiring a gear reduction system.

• Maximum Efficiency Point: For optimal lifespan, aim to operate the motor near its "Maximum Efficiency" torque. For the 1479 model, the target load should be approximately 0.66 mN.m.

• Stall Prevention: The "Stall Torque" represents the physical limit of the motor (e.g., 4.9 mN.m for the 11115 model). Continuous operation at or near stall conditions will cause rapid degradation of the precious metal brushes and windings due to thermal overload.

3. Structural Integration & Mounting Specifications

Precise physical integration is critical for compact devices like beauty rollers or electronic locks.

• Physical Dimensions: The motor body length is 26.3mm with a cross-section of 15.5mm x 12.0mm.

• Mounting Interface: Use the two M2.0 x 0.4 threaded holes located at the front, spaced 12.0mm apart for secure positioning.

• Shaft Handling: The output shaft diameter is 1.5mm with a length of 5.6mm. Engineering Warning: Never apply excessive axial force (e.g., hammering) when press-fitting gears, as this can damage the delicate internal brush structure.

4. Thermal Management & EMI Suppression

As a "Precious Metal-Brush" motor, its duty cycle and electrical noise must be managed.

• Duty Cycle: While output power ranges from 0.2W to 1.5W, the small form factor limits heat dissipation. It is recommended for intermittent use (e.g., short pulses for locks or timed sessions for beauty tools).

• Electrical Noise: High-speed rotation (up to 14,300 r/min) can generate electromagnetic interference. For audio-visual or camera applications, soldering a 0.1μF (104) ceramic capacitor across the terminals is advised to suppress EMI.