A motor and drive system comprises the motor itself, the driver, the controller and the harness. It is an electromechanical assembly whose failure modes are partly purely electrical and partly mechanical-thermal coupled.
Typical products
- Window lift motor
- Seat adjustment motor
- Wiper motor
- Power tailgate motor
- EPS electric power steering
- Electric water pump
- Turbocharger actuator
Test scope by category
- Electrical and EMC: load dump, overvoltage, reverse polarity, radiated emission, immunity, ESD.
- Mechanical and motion: vibration, shock, locked rotor, abnormal operating conditions.
- Thermal: temperature rise, insulation system retention after temperature cycling, thermal ageing.
- Environmental: high and low temperature, damp heat, ageing.
Common failure modes
- Insulation burn-out after a locked rotor.
- Driver malfunction under electromagnetic interference.
- Output torque loss from brush wear.
- Grease performance dropping after temperature cycling, causing noise or sticking.
- Contact resistance and heating at connectors under high-current conditions.
Selection and test guidance
- Confirm the rated power and duty cycle; test conditions are set from these.
- Safety-related parts (steering, braking) must be validated to the applicable functional safety level.
- Vibration testing of motors has to account for the mounting method — rigid and suspended mounting differ widely.
Service notes
Our laboratory holds both CMA and CNAS accreditation, covers about 10,000 m2 and runs more than 500 sets of equipment. All testing is carried out in our own laboratories — nothing is subcontracted. Plant visits and on-site witnessed testing are welcome.
Scheduling follows the actual project pipeline. You can state your preferred lead time when you submit samples; we will confirm a feasible plan against current capacity and keep you updated at each milestone.
