In the design and application of micro motors, performance stability is critical. However, even high-quality motors may encounter operational issues during assembly, shipping, or usage. As a professional micro motor manufacturer, we aim to provide basic technical knowledge for buyers and end users to help quickly identify and resolve common motor malfunctions.
Possible causes
Carbon brushes rubbing against the step on the commutator
Loose center plate structure
Lack of lubrication
Solutions
Check the brush-commutator contact for smooth movement
Secure the center plate to eliminate mechanical looseness
Apply the correct amount of motor-grade lubricant to reduce dry friction
Pro Tip
Vibration and noise testing before shipment is essential to detect potential problems early.
Possible causes
No axial clearance between rotor and stator, causing internal jamming
End cap too tight, restricting rotor rotation
Solutions
Readjust the axial clearance between rotor and stator per design specs
Review the assembly process and improve end cap tolerance control
Pro Tip
Abnormal current usually indicates excessive friction or internal structural issues and should be addressed promptly.
Possible causes
Deformed brushes or brush holder in the end cap
Brush not properly contacting the commutator
Improper installation or brush bending during assembly
Solutions
Replace deformed brushes
Adjust brush angle to ensure proper contact
Improve end cap design to prevent brush distortion
Pro Tip
Using high-elasticity and wear-resistant brush materials can improve motor reliability significantly.
Possible causes
Foreign objects inside the motor
Raw material defects or impurities
Rotor misalignment or assembly errors
Solutions
Disassemble and carefully inspect the motor interior
Remove any debris and replace damaged components if needed
Strengthen incoming quality inspection for raw materials
Pro Tip
Establishing a robust quality control process for key components helps minimize stall issues from the source.
With over 20 years of experience in micro motor R&D and manufacturing Lihua Motor offers a complete range of DC motors covering 1V to 36V voltage 0.05W to 100W output power and diameters from 5.4mm to 45mm. We not only supply standard motors but also provide OEM and ODM customization services based on your product structure power supply and functional requirements.
Backed by a team of experienced engineers an 80 percent automated production line and multiple international certifications including CE ISO9001 IATF16949 and ROHS Lihua Motor has successfully delivered customized motor solutions for over 20000 global projects.
Company Name Lihua Motor
Contact Person Jailyne Ms
Mobile WhatsApp Skype +86 136 3159 9864
Email sell02@hcsmotors.com
Website www.dcminimotors.com
Feel free to contact Ms Jailyne for a free evaluation and motor recommendation tailored to your product needs.
