Aluminum Shell Three-Phase Induction Motor
Introduction to Aluminum Shell Three-Phase Induction Motor. Motor is an asynchronous motor with aluminum alloy as the shell and driven by three-phase AC power supply. It complies with the IEC 60034 international standard. Motor is widely used in industrial power systems.
1. Core advantages of Motor
Lightweight: Aluminum shell Motor is 30%-40% lighter than cast iron, which is convenient for equipment integration and maintenance
Heat dissipation efficiency: The thermal conductivity of aluminum alloy (237 W/m·K) is significantly better than that of cast iron (55 W/m·K)
Corrosion resistance: Motor anodizing treatment can withstand IP55 protection level (dustproof/water spray)
Electromagnetic performance: Motor low eddy current loss design (<3% rated power)
2. Motor working principle
Electromagnetic induction law: Motor three-phase AC (50Hz/60Hz) input stator winding → generate rotating magnetic field (synchronous speed n₁=120f/p)
Slip mechanism: Motor rotor speed n₂ always lags behind n₁ (typical slip s=2%-5%), achieving asynchronous torque output
Energy conversion efficiency: Motor typical energy efficiency level: IE3 (high efficiency) to IE5 (super high efficiency), full load efficiency ≥92%
3. Motor key performance parameters
Power range: 0.12kW~315kW (IEC 80~355 frame size)
Rated speed: 750/1000/1500/3000 rpm (pole number 4P/6P/2P)
Direct starting current: 5~7 times rated current
Recommended step-down starting conditions: Star-delta starting is used when power>15kW
Protection level: IP55 (dustproof and waterproof)/IP65 (optional)
Vibration level: in accordance with ISO 10816-3 standard
4. Typical application scenarios of induction motor
General industrial equipment of induction motor
Water pump/fan (need to be matched with inverter to achieve energy-saving control)
Air compressor (requires start-stop times <15 times/hour)
Production line integration
Conveyor belt system (torque requirement 1.2~1.5 times rated value)
Machine tool spindle drive (accuracy requirement ±1rpm)
5. Special application environment of induction motor
Food processing (requires stainless steel fasteners + food-grade grease)
Chemical plant (Ex d IIB T4 explosion-proof certified model)
6. Selection and maintenance recommendations of induction motor
Selection formula: Power P (kW) = Torque T (N·m) × Speed n (rpm)/9550 × Safety factor (1.1~1.3)
Maintenance cycle:
Every 500 hours: Check bearing noise (sound pressure level <70dB(A))
Every 2000 hours: Replace grease (SKF LGMT 3 recommended)
Annual inspection items: Winding insulation resistance test (≥100MΩ@500V DC)
7. Development trend of induction motor industry
Intelligent upgrade: Integrated IoT sensor (temperature/vibration monitoring), support PROFINET/EtherCAT industrial communication protocol
Material innovation: Nano-ceramic coating improves heat dissipation efficiency (test data: temperature drop 15℃)
Energy efficiency standard: EU 2023 new regulations: mandatory IE4 energy efficiency level
