Motor Engineering
- Performance Parameters Efficiency: 85-96%. Power factor: 0.75-0.95. Service factor: 1.15-1.25. Starting torque: 150-250%. Breakdown torque: 200-300%.
- Operating Characteristics Speed regulation: 1-5%. Slip: 2-5%. Temperature rise: 40-80°C. Insulation class: F-H. Duty cycle: S1-S9.
- Load Factors Full load current: 0.8-1.0×FLA. Starting current: 6-8×FLA. No-load current: 20-35% FLA. Locked rotor code: A-L. Utilization factor: 0.65-0.85.
Electrical Design
- Power Requirements Voltage tolerance: ±10%. Current density: 3-6 A/mm². Frequency variation: ±3%. Phase imbalance: <2%. Harmonics: THD <5%.
- Protection Standards Overload capacity: 115-125%. Short circuit rating: 10-18 kA. Ground fault: 30-100 mA. Thermal protection: Class 10-30. IP rating: 23-65.
- Control Systems Starting method: DOL/Y-Δ/VFD. Acceleration time: 3-10s. Braking torque: 100-150%. Speed range: 10:1-1000:1. Response time: 50-200ms.
Mechanical Specifications
- Construction Parameters Frame size: IEC 71-355. Bearing life: L10 20,000hrs. Shaft runout: 0.02-0.05mm. Balance grade: G1.0-2.5. Noise level: 65-85 dBA.
- Cooling System Air flow: 3-5 m/s. Temperature rise: IC411-IC416. Fan efficiency: 60-75%. Heat dissipation: 15-25% rated power. Ambient range: -20 to +40°C.
- Mechanical Integration Coupling alignment: ±0.05mm. Mounting tolerance: IT7. Vibration level: 2.8-4.5 mm/s. Foundation rigidity: 5× motor mass. Belt tension: 2-4% span.
Maintenance Protocol
- Inspection Schedule Visual check: monthly. Vibration analysis: quarterly. Insulation test: semi-annual. Bearing inspection: 4000-8000 hrs. Alignment check: annual.
- Performance Monitoring Current monitoring: continuous. Temperature trending: hourly. Vibration trending: daily. Power quality: weekly. Efficiency tracking: monthly.
- Preventive Measures Bearing lubrication: 2000-4000 hrs. Air gap check: annual. Brush replacement: 8000-12000 hrs. Cleaning cycle: quarterly. Bolt torque: semi-annual.