Major Fan Motors

Major Fan Motors

YX, YS Series Three-Phase Asynchronous Motors for Induced Draft, Primary Air, and Forced Draft Fans

Industry Background

In coal-fired power plant boiler systems, the induced draft fan, primary air fan, and forced draft fan—collectively known as the “Three Major Fans”—are critical equipment to ensure safe and stable operation of combustion, ventilation, and flue gas exhaust systems.

The Three Major Fans operate continuously under high-load conditions, placing extremely high demands on the drive motors in terms of reliability, efficiency, vibration control, and service life. Their performance directly affects the safety, economy, and environmental compliance of the power unit.

As an essential component of thermal power plant equipment, fan motors have long been a core product and key business area for Shanghai Electric Group, Shanghai Electric Motor Factory Co., Ltd.

Product Overview

The YX and YS series three-phase asynchronous motors are high-efficiency, energy-saving motors developed specifically for major fan applications in coal-fired power plants.

Key features of the design include:

• Mature and reliable low-resin VPI vacuum pressure insulation system

• Systematic optimization through advanced electromagnetic, structural strength, and thermal analysis

• Stable operation under long-term continuous operation and complex working conditions

Through years of engineering practice and large-scale operational verification, the YX and YS series fan motors have been successfully applied in numerous large domestic and international thermal power units, forming a mature, reliable, and widely adopted product system.

Technical Features

• High efficiency and energy-saving: Optimized electromagnetic design and low-loss materials reduce fan system energy consumption.

• Advanced and reliable insulation: Mature low-resin VPI process ensures good overall integrity, high anti-aging capability, and suitability for high-temperature, dust-laden environments.

• Stable operation and low vibration: Reasonable structural design and high rotor dynamic balance precision support long-term continuous operation of high-power fans.

• Adaptable to various operating conditions: Can reliably handle different load characteristics of induced draft, primary air, and forced draft fans.

Product Coverage

• Capacity range: 200 kW – 13,000 kW

• Rated voltage: 6 kV, 10 kV

• Center height range: H355 – H1250

• Number of poles: 4 – 12 poles

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.

The company has established a complete motor product system covering boiler auxiliary systems, with the Three Major Fan Motors forming an important part. These motors have long served mainstream thermal power units both domestically and internationally, building significant brand advantages and technical barriers.

Typical Project References

1. Shenhua Ningdong Power Plant, Ningxia — Induced Draft Fan Motor

   • Motor model: YKK1250-8

   • Rated power: 13,000 kW

   • Rated voltage: 10 kV

   • Project highlight: Long-term stable operation of high-power induced draft fan, meeting high-load continuous operation requirements

2. Baima Power Plant, Sichuan — Primary Air Fan Motor

   • Motor model: YKK900-4

   • Rated power: 6,200 kW

   • Rated voltage: 10 kV

   • Application result: Reliable operation with high efficiency, effectively supporting stable boiler combustion

3. Guodian Jianbi Power Plant, Jiangsu — Forced Draft Fan Motor

   • Motor model: YKK800-6

   • Rated power: 3,500 kW

   • Rated voltage: 6 kV

   • Project result: Long-term continuous operation with low vibration and noise, highly praised by the client

The widespread application of YX and YS series Three Major Fan Motors has significantly improved the safety and economic performance of coal-fired power plant ventilation and combustion systems.

These motors provide reliable power support for stable operation, energy savings, and environmental compliance, fully demonstrating Shanghai Electric’s technological strength and industry leadership in thermal power auxiliary motors.