BLDC Motors, efficiency at its best

Though a BLDC motor is fairly efficient by nature, designers today face mounting pressure to further enhance their design’s efficiency and stand out on the competitive market. This can be achieved, for example, by reducing overall energy consumption and optimizing thermal management. Reducing the system size and decreasing maintenance can also help produce desirable results.

In Automotive we find BLDC-Motors mainly in applications which are basically permanently in use or where extreme high dynamical behavior is required:

• Fans ( e. g. HVAC-Fan)
• Pumps (e. g. Fuel-Pump or Water-Pumps)
• Engine-Cooling
• Active suspension and eTurbo (mainly 48V applications)
• and even for Oil-Pumps where ambient Temperatures of up to 150°C are reached

Block diagram of BLDC motor control with Infineon® Embedded Power IC

Depending on specific circumstances and boundary conditions, customers choose their optimal system-design. Most relevant are:

• Power-Requirements
• Voltage-Supply
• Space-Constrains
• Dynamic/Control requirements