Synchronous motors are widely used in the papermaking industry due to their high efficiency, precise speed control, and power factor correction capabilities. They are particularly suitable for heavy-duty, continuous-operation applications such as paper machine drives, pumps, and fans.
Constant Speed Operation: Ensures stable production speed for uniform paper quality.
High Power Factor: Reduces reactive power consumption, improving energy efficiency.
Overload Capacity: Handles sudden load variations in paper machines.
Low Maintenance: Brushless designs reduce wear and downtime.
(1) Motor Sizing & Load Requirements
High Starting Torque: Needed for heavy rollers and pumps.
Variable Speed Needs: Some sections (e.g., drying, winding) may require adjustable speeds.
Environmental Factors: Resistance to humidity, dust, and chemical exposure.
(2) Excitation System
Brushless Excitation: Preferred for reduced maintenance.
Automatic Power Factor Control (APFC): Maintains optimal efficiency.
(3) Cooling & Protection
TEFC (Totally Enclosed Fan-Cooled) or IC 411: For dusty/moist environments.
IP55/IP56 Protection: Prevents ingress of water and particulates.
|
Application |
Motor Type |
Key Requirement |
|
Main Drive (Paper Machine) |
Precise speed synchronization |
|
|
Pumps (Pulp, Water) |
Synchronous motor with VFD |
Energy efficiency & reliability |
|
Fans & Blowers |
Synchronous motor (PFC mode) |
Power factor correction |
|
Winder/Unwinder |
Servo-synchronous motor |
Tension control & speed adjustment |
Soft Starting: Reduces mechanical stress on gears and belts.
Speed Matching: Ensures synchronization between different sections.
Energy Recovery: Some VFDs allow regenerative braking for energy savings.
Problem: A paper mill faced high energy costs due to inefficient induction motors.
Solution: Replaced with Permanent Magnet Synchronous Motors (PMSM) + VFDs.
Result:
• 15-20% energy savings (due to higher efficiency & power factor correction).
• Reduced downtime (brushless design lowered maintenance needs).
⇒ Permanent Magnet Synchronous Motors (PMSM): Higher efficiency, smaller footprint.
⇒ Smart Motor Control: IoT-enabled monitoring for predictive maintenance.
⇒ Hybrid Drives: Combining synchronous motors with energy storage systems.
Synchronous motors offer superior efficiency, reliability, and control in papermaking, making them ideal for main drives, pumps, and fans. Proper design (cooling, excitation, VFD integration) ensures optimal performance in harsh industrial environments.
Would you like a more detailed analysis on a specific application (e.g., paper machine sectional drives)? Please contact with us now.
