Motor Control Troubleshooting Guide
Common motor control issues and diagnostic procedures including start-up failures, instability, noise, and protection trips.
Key topics covered include Troubleshooting, Motor Control Debug, Fault Diagnosis. This section provides detailed technical information for engineers designing with linco products.
For specific application requirements and design assistance, contact linco's technical support team or refer to the official product documentation and reference designs.
💡 FAE Insights
⚠️ Common Pitfalls
- ✗ Debugging software when hardware has issues
- ✗ Ignoring current sensing accuracy
- ✗ Overlooking mechanical system problems
- ✗ Not documenting baseline measurements
📋 Customer Cases
Motor Control Manufacturer
Industrial Automation
Challenge
Implementing motor control solution with specific requirements
Solution
Used Linco MCU with recommended configuration
Results
Successfully achieved performance targets with reliable operation
Frequently Asked Questions
1. Why does my sensorless motor fail to start?
[Data Pending] Answer to be verified with manufacturer technical support team.
2. What causes motor current ripple and how do I reduce it?
Motor current ripple causes and solutions: (1) PWM ripple - inherent to switching, reduce by increasing PWM frequency or adding inductance; (2) Dead-time distortion - causes current distortion at zero-crossing, minimize dead-time or compensate in software; (3) Current sampling timing - sampling at wrong point in PWM cycle causes aliasing, synchronize ADC with PWM; (4) Sensor noise - inadequate filtering on current sensors, add RC filter; (5) Control instability - oscillating current loop, reduce PI gains. Measurement: use current probe to see actual ripple vs control reference. Solutions: (1) Increase PWM frequency to 15-20kHz; (2) Optimize dead-time; (3) Synchronize sampling; (4) Add output inductor if needed; (5) Tune current controller. Some ripple is normal - typically 10-20% of rated current.