Pulverizer (Coal Mill) Motors

Pulverizer (Coal Mill) Motors

YSTM, YSHP, YSMPS Series Medium- and Low-Speed Three-Phase Asynchronous Motors for Coal Mills

Industry Background

In coal-fired power plant pulverizing systems, coal mills are critical equipment to ensure stable boiler combustion and safe operation of the generating unit. Their drive motors must withstand long-term heavy-duty starts, high rotational inertia, frequent impact loads, and continuous operation under severe working conditions.

The performance and reliability of coal mill motors directly affect the energy consumption of the pulverizing system and the overall operational economy of the power plant.

To meet the power industry’s requirements for high-reliability and high-efficiency coal mill drive motors, Shanghai Electric Group, Shanghai Electric Motor Factory Co., Ltd. has, based on long-term engineering experience, developed the YSTM, YSHP, and YSMPS series medium- and low-speed three-phase asynchronous motors for coal mills.

Product Overview

The YSTM, YSHP, YSMPS series coal mill motors are a mature product line developed with extensive reference to domestic and international coal mill drive technologies, based on JB/T 7127 – Technical Conditions for Three-Phase Asynchronous Motors for Coal Mills.

These motors are systematically optimized for heavy-load starting and long-term stable operation of coal mills, with outstanding features including:

• High starting torque

• High operational efficiency

• Low system energy consumption

• Strong reliability

This series has maintained a leading market share in China’s thermal power pulverizing sector for many years.

Technical Features

• High starting torque design: Optimized rotor structure and electromagnetic parameters ensure safe and reliable starting under heavy-load, high-inertia coal mill conditions.

• Low system energy consumption: High efficiency and low operational losses effectively reduce the overall energy consumption of the pulverizing system, contributing to power plant energy savings.

• Robust and reliable structure: The frame, shaft system, and bearings are designed for high strength, ensuring stable operation under continuous operation and frequent impact loads.

• Mature, stable, and field-proven: Extensive operational experience and technical maturity ensure long-term stable performance with low maintenance costs.

Product Coverage

• Capacity range: 220 kW – 4,000 kW

• Rated voltage: 6 kV, 10 kV

• Center height range: H450 – H800

• Number of poles: 6-pole, 8-pole

Industry Position

Shanghai Electric Group, Shanghai Electric Motor Factory Co., Ltd. is a pioneer and core manufacturer of domestically produced thermal power equipment in China. It maintains a leading market share in the domestic thermal power motor market and offers a full range of motors for the entire power plant process, including boilers, pulverizing systems, feedwater, circulating water, and auxiliary systems, providing integrated power solutions.

Typical Project References

1. Qingshuichuan Power Plant, Fugu, Shaanxi Province

   • Motor model: YHP710-6

   • Rated power: 1,150 kW

   • Rated voltage: 10 kV

   • Application result: Meets heavy-load starting requirements for coal mills, operating smoothly and reliably

2. Datang Yangcheng Power Plant

   • Motor model: YTM800-6

   • Rated power: 2,500 kW

   • Rated voltage: 10 kV

   • Project highlight: Long-term continuous operation, low system energy consumption, high stability

3. Guodian Taizhou Power Plant

   • Motor model: YMPS630-6

   • Rated power: 1,000 kW

   • Rated voltage: 6 kV

   • Application outcome: Excellent operational performance, recognized by the client

Application Value

The wide application of the YSTM, YSHP, and YSMPS series coal mill motors has effectively improved the operational reliability and energy efficiency of thermal power pulverizing systems. These motors provide a solid foundation for safe production, stable operation, and energy savings in power plants, demonstrating Shanghai Electric’s technological strength and industry leadership in coal mill motor solutions.