Why Brushless motor is better?

Brushless motors is becoming increasingly popular in recent years for a good reason. Compared to traditional AC motors, brushless motors have several advantages that make them a better choice for a wide range of applications. In this article, we will explore the reasons from the following aspects.

Stable speed control

Brushless motors have the ability to maintain a stable speed, even under varying loads. This is achieved through the use of feedback control systems. The system continuously monitors the motor’s speed, and adjusts the voltage and current supplied to the motor as needed to maintain the desired speed.

In contrast, AC motors typically rely on mechanical systems to regulate speed, such as changing the number of poles in the motor or adjusting the frequency of the AC power supply. These methods are less precise and can result in speed fluctuations under varying loads.

As a result, brushless DC motors are recommended for applications that require stable speed control regardless of the load fluctuation.

Higher torque at low speeds

Brushless motors have a higher torque at low speeds, which makes them well-suited for applications that require high starting torque, such as robotics, electric vehicles, and industrial machinery.

 

Space-saving design

Brushless DC motors have a slim body and provide high power due to the use of permanent magnets in the rotor. This compact design makes them an excellent choice for applications where space is limited. For example, brushless motors are commonly used in drones, where weight is a crucial factor in determining flight time and maneuverability.

Saving Energy

Brushless DC motors use permanent magnets in the rotor, which reduces the secondary loss of the rotor. This results in a reduction in power consumption and increased energy efficiency compared to traditional AC motors.  According to research, brushless motors can reduce power consumption by up to 35% compared to frequency conversion control of three-phase induction motors. This makes brushless motors an excellent choice for applications where energy consumption is a significant concern, such as in electric vehicles.

AC and DC Power Supply

One of the unique advantages of brushless motors is that they can use both AC and DC power supplies. In contrast, AC motors can only use AC power. This versatility makes brushless motors an excellent choice for applications where power supply options are limited .

 

In conclusion, brushless motors offer several advantages over traditional AC motors, including stable speed control, higher torque at low speeds, space-saving design, energy efficiency, and versatility in power supply options. These advantages make brushless motors an excellent choice for a wide range of applications, from robotics and automation to electric vehicles and aerospace engineering.