High power brushless DC motors are widely used in the automotive industry for applications such as wheel drives, air conditioning compressors, blowers, purifiers, vacuum pumps, etc. Let’s take a look at some of the major applications:

1. Electric Vehicle Wheel Drive Motors

Wheel drive motors for EVs can be classified into brushed DC motors, AC induction motors, brushless DC motors, and switched reluctance motors. Brushless DC motors have emerged as the superior choice due to advantages like high efficiency, high power density, low maintenance, and precise speed/torque control.

In EVs, each wheel is directly driven by an independent in-wheel brushless motor. Electronic commutation replaces the mechanical transmission and brushes, enabling high-speed operation. Wheel motors also simplify tire changes without affecting the motor.

2.Automotive HVAC Compressor Motors

Specially designed low voltage, high current brushless DC motors can eliminate issues with brushed motors like noise, shorter lifespan, and maintenance difficulties. Optimized for 12V automotive systems, they must overcome space constraints and high current densities through innovative winding and thermal management techniques.

The brushless design enhances reliability and efficiency. Together with electronic control, they can dynamically optimize operation for improved climate control and energy savings.

3.Automotive Air Purifier Motors

Centrifugal automotive air purifiers typically use a brushless DC motor to drive the impeller fan for removing pollutants. Compact outer-rotor motors with internal stators allow direct air flow through the core for efficient air movement.

Dedicated ICs provide seamless sensorless electronic commutation for simple, reliable operation. Protection features prevent damage from over-current, over-temperature, etc.

In summary

High power brushless DC motors are finding increasing use cases in modern vehicles. Please contact us if you need any assistance with selecting the optimal brushless DC motor solution for your automotive application.  

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