55kW Motor

What is a 55kW Motor? 

The 55kW three-phase asynchronous motor is a core power unit designed for medium-to-large-scale industrial heavy-duty applications. Engineered and manufactured in strict compliance with the GB/T 755 national standard for rotating electrical machines, IEC 60034 international electrical specifications, and GB 18613 energy-efficiency regulations, it is a high-efficiency, totally enclosed, three-phase AC motor meeting national industrial standards. Specifically designed for the continuous, high-load operation typical of heavy-duty equipment, the motor features ample rated torque, stable overload margins, and excellent tolerance for shock loads. It is widely used in applications such as powering heavy industrial machinery, upgrading production line drive systems, and optimizing the performance of legacy equipment, serving as a versatile and reliable workhorse in the heavy industry sector.
This series of 55kW three-phase motors incorporates high-purity oxygen-free copper windings, high-permeability/low-loss silicon steel laminations, reinforced cast-aluminum rotors, and thickened, high-strength cast-iron housings. These features are specifically optimized to enhance the core performance of high-power, heavy-duty motors, effectively addressing common industry challenges such as insufficient torque output under heavy loads, excessive temperature rise during prolonged operation, tripping due to load fluctuations, and high energy consumption. The product supports S1 continuous duty cycles; its protection, insulation, and heat dissipation systems have been specially optimized for heavy-duty industrial use, making it suitable for demanding, high-intensity operating environments found in mining, heavy industry, large-scale building materials production, and large fluid-handling equipment.

B3 Foot-mounted

B5 flange-mounted

B14 Small flange mounted

B34 Foot and small flange mounted

B35 Foot flange mounted

• Delivering ultra-high torque for heavy-duty output, the motor features comprehensively upgraded impact resistance. The 55kW model utilizes an optimized high-torque magnetic circuit design, with precisely matched stator-rotor slot/pole configurations and air-gap tolerances. This significantly boosts starting and peak torque while ensuring exceptional tolerance for load shocks, making it ideally suited for high-impact applications such as heavy-duty crushers, large-scale mills, and heavy-load conveyors. The motor offers rapid startup response and robust power during full-load operation, effectively preventing issues like sluggish starts, speed drops under load, and instantaneous overload trips; it maintains stable, consistent power output without significant degradation, even under high-load and fluctuating industrial operating conditions.

• A dedicated cooling system for heavy-duty operation effectively resolves the issue of heat accumulation. High-power motors operating at full load over extended periods are prone to overheating; to address this industry challenge, this model features upgraded, widened, and thickened integrated cooling fins and a larger-diameter, quiet cooling fan. The cooling airflow path has been re-engineered for comprehensive circulation, significantly increasing the heat dissipation surface area. Combined with an F-class high-temperature insulation system and a fully enclosed cooling structure, the unit maintains temperature rise within national safety standards-even in high-temperature summer workshops, confined operating environments, or during 24-hour full-load operation. This prevents winding degradation and short-circuit failures caused by overheating, thereby substantially extending the equipment's service life.

• The machine features a high-strength, reinforced cast-iron base that offers superior rigidity, vibration resistance, and compressive strength compared to standard models, effectively withstanding the high-frequency vibrations, material impacts, and mechanical wear associated with heavy-duty operations. The core rotor undergoes multiple precision dynamic balancing corrections to eliminate eccentricity and jitter during high-speed operation; it is equipped with specialized, high-precision, heavy-duty bearings that are wear- and fatigue-resistant, ensuring reliability during prolonged, intensive use. Additionally, the sealing system has been upgraded to an IP55 protection rating, effectively blocking the ingress of dust, moisture, and debris, making it perfectly suited for harsh, dusty, and humid environments such as those found in mining, cement production, and the chemical industry.

Products Description

 

Model	Y2 Series 55kW Motor
Frame	250
Power	55kW
Speed	3000rpm, 1500rpm, 1000rpm
Voltage	380/660V, 400/690V, or customization
Frequency	50HZ/60HZ
Efficiency	IE1, IE2, IE3, IE4
Motor shaft diameter	Φ60/65
Cooling	Fan
Protection	IP44/IP54/IP55
Housing	Aluminum/Cast Iron
Ambient temperature	-15℃≤0℃≤40℃
Altitude	No exceeding 1000 meters
Duty	S1

 

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Application

 

The 55kW three-phase motor is a specialized power unit designed for medium-to-large, heavy-duty industrial applications. Engineered for high-load, high-torque, and continuous heavy-industry operations, it offers ample load redundancy and excellent adaptability to diverse working conditions. It is widely utilized across major industrial sectors-including mining, construction materials, chemicals, metallurgy, and large-scale fluid handling-in applications such as:
- Mining, Sand, and Aggregate Industries: Primary drive for large jaw crushers, impact sand-making machines, heavy-duty drum screens, long-distance belt conveyors, and ore washing/beneficiation equipment.
- Construction Materials and Cement Industries: Cement ball mills, vertical grinding mills, large mixing units, drying line equipment, high-temperature induced draft fans, and heavy-duty brick-making machinery.
- Fluid Handling and Environmental Protection Industries: Large industrial centrifugal water pumps, high-pressure sewage pumps, cooling tower fans, main dust-extraction induced draft fans, and high-power sewage treatment systems.
- Chemical, Rubber, and Plastics Industries: Large plastic extruders, internal mixers (Banbury mixers), heavy-duty agitators for chemical reactors, corrosion-resistant conveyor systems, and auxiliary power units for petrochemical facilities.
- Metallurgy, Grain Processing, and Heavy Industry: Metallurgical material hoists, large-scale grain drying equipment, heavy-duty assembly line drive systems, and core power units for integrated heavy industrial machinery. 

 

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