Alternating Current AC Motor

Alternating Current AC Motor generate a rotating magnetic field through alternating current, driving the rotor to rotate and converting electrical energy into mechanical energy. Its core mechanism includes:

The principle of rotating magnetic field: When AC power is applied to the stator coil, the direction of the magnetic field rotates with the change of current, forming a dynamic magnetic field.

Principle of induction motor: The rotor induces current in a rotating magnetic field, interacts with the magnetic field to generate torque, and drives the motor to operate.

 

 

synchronous motor

The rotor speed is strictly synchronized with the power frequency, suitable for high-precision constant speed scenarios such as generators and elevators.

Asynchronous motor (induction motor)

The rotor speed is slightly lower than the rotating magnetic field, with a simple structure and low cost, making it the most commonly used type in industry.

Three phase asynchronous motor: with a wide power coverage (from a few watts to one million kilowatts), suitable for heavy-duty equipment such as cranes and fans.

 

 

• Simple structure: no carbon brush and commutator, low maintenance cost.
• Efficient and energy-saving: The efficiency of three-phase motors can reach over 90%, making them suitable for long-distance power transmission.
• Wide adaptability: High tolerance for voltage fluctuations (± 10%), suitable for harsh environments.
• Wide speed regulation range: Smooth speed regulation can be achieved through a frequency converter to meet different load requirements.
• Cost effectiveness: No need for complex control systems, simply connect to 220V single-phase power to operate.

 

 

(1) Ambient Temperature: -15℃≦θa≦40℃

(2) Rated Voltage: 220V AC

(3) Rated Frequency: 50Hz/60Hz

(4) Altitude: ≦1000m

 

 

 

The Alternating Current AC Motor with its ultra-high power, torque, and reliability, is designed for extreme heavy-duty, continuous high-intensity operations. It is widely used in industrial, energy, large-scale infrastructure, and heavy machinery sectors. Below are its core applications:

 

Industrial and Heavy Manufacturing

• Ultra-High-Pressure Fluid Systems: Petrochemical process pumps (transferring crude oil or high-temperature steam at ≥4.0MPa). Industrial air compressors (output ≥5m³/min at 1.3–1.6MPa).
• Reason: High torque (3× rated torque, ≥33N·m) suits extreme conditions.
• Heavy Processing Equipment: Large stamping machines (＞1000-ton force for automotive sheet metal forming). Metallurgical rolling mill drives (continuous operation >10 hours/day).
• Reason: Forced cooling (IC416 standard) prevents overheating.

 

Agriculture and Resource Extraction

• Ultra-Deep Wells and Long-Distance Irrigation: Submersible deep-well pumps (lift >150 meters, irrigating 1000+ acres). Mine dewatering pumps (24/7 groundwater extraction, flow >50m³/h).
• Reason: IP68 rating for underwater or dusty environments.
• Resource Processing Machinery: Large wood chippers (processing logs >30cm in diameter). Ore crushers (breaking rocks with hardness >7 Mohs).
• Reason: 200% overload capacity (1 minute) handles sudden resistance.

 

Commercial and Public Infrastructure

• Mega-Scale HVAC Systems: District heating circulation pumps (pipe diameter >300mm, high-temperature water). Data center liquid cooling systems (coolant circulation for >100kW heat dissipation).
• Reason: IE5 ultra-high efficiency (>95%) reduces long-term costs.
• Heavy Transport and Logistics: Port gantry crane drives (lifting 40-ton containers). High-speed warehouse sorting lines (throughput >5000 items/hour).
• Reason: VFD speed control (0–200Hz) ensures precision and energy savings.

 

Construction and Energy Infrastructure

• Mega Engineering Machinery: Tunnel boring machine main drives (excavating >10m diameter tunnels in hard rock). Wind turbine pitch/yaw systems (for 5MW+ turbines).
• Reason: Low-speed, high-torque design (e.g., 4-pole motor, 1480rpm).
• Critical Energy Plant Equipment: Nuclear plant cooling pumps (redundant design for safety). Gas turbine auxiliary systems (lubrication or fuel boost pumps).
• Reason: Explosion-proof certification (Ex d IIC T4) for hazardous areas.

 

 

Power Supply: Three-phase 380V (rated current ≈21A; use 32A breaker + thermal relay). Voltage fluctuation <±3% (recommend dynamic voltage regulators).

Load Management: Optimal load range: 90–110% (9.9–12.1 kW), peak efficiency >94%. Avoid prolonged overload >120% (add current monitoring modules).

Maintenance: Check bearing vibration every 250 hours (>4.5mm/s requires alignment). Replace cooling fan filters every 6 months (prevent dust clogging).

 

 

Medium/small-scale devices (e.g., small CNC machines): Severe overcapacity.

Millisecond start/stop cycles (e.g., high-frequency presses): Inertia delays response.

Single-phase/low-voltage power: Conversion efficiency loss >40%.

 

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