SHUAIRUI®: Brushless DC motor, multiple applications in automobiles

In the process of the automotive industry's continuous pursuit of high efficiency, energy saving and intelligence, brushless DC motors have been widely used in multiple key systems of automobiles with their many excellent characteristics, significantly improving automobile performance and user experience.

1. Automobile power system

1.1 Hub motor drive

The hub motor integrates the motor into the hub to achieve distributed drive. The brushless DC hub motor eliminates the drive shaft, differential, etc., simplifies the structure, reduces weight and improves efficiency; it can independently and accurately control the wheel torque, making the vehicle acceleration and deceleration, steering more sensitive, and greatly improving the handling and stability.

1.2 Hybrid vehicle auxiliary power

In hybrid vehicles, brushless DC motors assist the engine. It helps improve efficiency and reduce emissions during startup, low speed, and rapid acceleration, and generates electricity and stores energy during braking to improve energy utilization.

2. Automobile air conditioning system

2.1 Air conditioning compressor drive

Traditional automobile air conditioners use belt-driven fixed-displacement compressors with high energy consumption and poor regulation. The variable displacement compressor driven by the brushless DC motor can be cooled on demand with electronic speed control, which is energy-saving and efficient. It can also quickly control temperature, reduce noise and improve comfort.

2.2 Air conditioning blower

The brushless DC motor is used in the air conditioning blower, which can precisely control the air volume with infinite speed regulation. It can flexibly adjust the air speed according to the temperature feedback in the car to keep the temperature stable; its high efficiency makes the energy consumption lower under the same air volume, reduces the power burden of the whole vehicle and improves the vehicle's endurance.

3. Automobile auxiliary equipment

3.1 Electric power steering system (EPS)

In the EPS system, the brushless DC motor provides precise steering assistance based on the vehicle speed and steering wheel angle signal. Compared with traditional hydraulic power assistance, it has lower energy consumption, and the power assistance is dynamically adjusted with the vehicle speed. It is light at low speed and stable at high speed. In addition, the system structure is compact and easy to integrate and control, which is in line with the trend of automobile intelligence.

3.2 Automobile cooling fan

The engine and battery cooling fans are equipped with brushless DC motors, which can adjust the speed in real time according to the temperature. It rotates slowly or stops at low temperatures to save energy and reduce noise, and speeds up and dissipates heat at high temperatures, which can not only ensure the core components operate at a constant temperature, but also reduce consumption and improve the durability of the vehicle.