Motor Drive Repair

Renown Electric’s drive repair expertise spans the full spectrum of motor control technologies, from traditional DC drives to advanced variable frequency drive systems. Our technicians are factory-trained on major drive brands and equipped with specialized diagnostic tools to quickly identify problems and implement lasting solutions.

DC Drive Repair and Maintenance

Our DC drive repair services address the unique challenges of SCR-based motor control systems that remain critical in many industrial applications. DC drives provide precise speed and torque control for applications requiring high starting torque or four-quadrant operation. Common DC drive failures include SCR module degradation, armature and field control issues, and tachometer feedback problems that can cause erratic speed control or complete drive shutdown. Our technicians perform comprehensive diagnostics on DC drive circuits, replace failed semiconductors, and calibrate control systems to restore optimal performance. We service all major DC drive manufacturers and maintain extensive parts inventory for rapid repairs.

AC Drive and Variable Frequency Drive Repair

AC drives encompass a broad range of motor control technologies, with Variable Frequency Drives representing the most common and energy-efficient solution for three-phase motor applications. VFD repair requires specialized knowledge of power electronics, motor control algorithms, and industrial communication protocols. Our VFD repair services include diagnosis and repair of IGBT power modules, DC bus capacitor replacement, gate drive circuit troubleshooting, and parameter programming restoration. Whether you’re experiencing nuisance tripping, overcurrent faults, communication errors, or complete drive failure, our technicians have the expertise to restore your VFD systems to full operation. We work with all major VFD manufacturers and maintain current software versions for proper drive commissioning and parameter backup.

Servo Drive and Precision Motion Control Servo drives demand the highest levels of precision and reliability for positioning applications in manufacturing, packaging, and automation systems. Our servo drive repair services address both analog and digital servo systems, including feedback device replacement, amplifier module repair, and motion controller programming. Servo drive failures often manifest as positioning errors, excessive following error, or inability to maintain commanded position, requiring sophisticated diagnostic equipment and deep understanding of closed-loop control systems.

Comprehensive Motor Drive Repair Capabilities & Testing

Renown Electric combines advanced diagnostic technology with experienced technicians to provide complete drive repair solutions. Our facility houses specialized test equipment for load testing drives under actual operating conditions, ensuring repairs meet original performance specifications before equipment returns to service.

Our drive repair process begins with comprehensive diagnostics using oscilloscopes, power analyzers, and manufacturer-specific diagnostic software to identify root causes rather than just symptoms. For Variable Frequency Drive repairs, we perform complete power stage analysis, including IGBT testing, gate drive verification, and DC bus ripple analysis. DC drive repairs include SCR testing, field and armature circuit analysis, and feedback system calibration. Every repair includes thorough documentation of findings and corrective actions taken.

Preventative maintenance services help avoid costly emergency repairs through scheduled inspections, thermal imaging analysis, and predictive maintenance monitoring. Our infrared thermography services provide temperature analysis to detect internal drive problems before they force production shutdowns, while our motor and drive surveillance programs offer comprehensive predictive maintenance technology that provides early indication of equipment health issues.

Emergency drive repair services ensure minimal downtime when critical systems fail unexpectedly. Our 24/7 emergency service includes on-site diagnosis, temporary drive installation when available, and expedited repair services to get your operations back online quickly.

After every repair, we conduct both static and dynamic testing to verify that your drive system operates at full capacity. Load testing confirms proper operation under actual working conditions, while parameter verification ensures all drive settings match your application requirements.