DC Brushless Fans (BLDC) are designed to convert electrical energy to mechanical motion by inducing air movement powered by a DC power source. They operate through an integrated brushless motor with a cross pattern configuration of four permanent magnets mounted on the rotor sides. These fans do not require any brushes to operate and are highly reliable, durable, and energy efficient. Furthermore, they efficiently reach their full potential and operate noiselessly. In addition, the fan’s speed is controlled merely by fluctuating the voltage input.
What are brushless motors?
A brushless motor is devoid of carbon brushes, armatures, ring magnets, and commutators designed to convert electric current into rotational motion. These brushless motors, also known as BLDC motors, offer various advantages, including a higher power-to-weight ratio, higher speed potential, and electronic control. In addition, due to the lack of integrated mechanical devices, they are durable, smooth-performing, and lightweight fans, contributing to reduced cost and potential weight problems.
Types of DC Brushless Fans (BLDC):
Brushless DC fans are grouped into two categories: BLDC fans with sensor motors and BLDC fans with Sensor-less motors.
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BLDC Fan with Sensor Motor:
These fans are provided with a sensor known as a half effect sensor, which helps in sensing the magnet’s position.
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BLDC Fan with Sensor-less Motor:
These fans are equipped with back EMF, ideal for detecting the magnet’s position.
Specifications and Advantages of DC Brushless Fans (BLDC):
BLDC fans have various unique features and advantages, including:
- Low acoustic noise,
- Variable speed control
- High reliability
- Long lifetime
- Reduce power consumption by up to 65%, contrary to ordinary induction motors.
- Low power consumption
- Lack of mechanical wear of sparking, commutator brushes, and electromagnetic interference (EMI) produced by its rotation.
- Protection features
- Easy to maintain
- Communication interface capability
Applications of DC Brushless Fans (BLDC):
They are widely used in:
- Refrigerators
- Washing Machines
- Vacuum Cleaners
- Air Conditioners
- Fans
- Generators
- UPS
