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Brushless vs. Brushless Motors: Which is right for your project?

Classification:
Professional Information
Author:
Ruinuo Tech.
Source:
2021/05/27
[Abstract]:
Brushless vs. Brushless Motors: Which is right for your project?

Brushless vs brushed motor: which is right for your project?

When everyone talks about brush motors and brushless motors, people who know a little about motors are more inclined to choose brushed motors, because of the advantages of digital control and low noise of brushed motors. But the truth is that these options are not the best options for the project.
The choice between brushed or brushless motors depends entirely on the project you take. Brushed and brushless motors are ideal for different projects, respectively.
The above section is a complex difference between brushed and brushless motors and guides you in choosing the right motor for your current project.

The main difference between brushed and brushless motors

Ordinary people can't tell the difference between the two, and although both produce similar results—electrical energy is converted into mechanical energy, producing axial rotation—their respective functional design points are very different.

The function of a brushed motor

 
As you might have guessed, the name of the brushed motor comes from the brushes installed in the internal structure. The motor rotor rotates by connecting the brushes to the commutator, and the brushes are the only energy provider that directly causes the rotor to rotate.

The function of brushless motors

 
Brushless motors do not have the brushes mentioned above. Hall-effect sensors inside the motor detect the position of the magnetic poles inside the device, thereby driving current to the dedicated phase of the winding coil, which rotates under the action of the magnetic poles according to Fleming's left-hand rule.

Which is better?

The difference between them is neither good nor bad. The nature of the project will determine which one is best for you. In a project, it may be because you need exactly one of their features and not others, so the right choice is more important.
Yes, brushed motors are cheaper than brushless motors, which is a significant advantage of brushed motors, so brushed motors still play an important role in today's technology field.

Projects that are beneficial for brushed motors

Due to certain design features of brushed DC motors, they may be preferred in some aspects. Keep the following in mind:
  1. Brushed motors are more prone to wear
  2. They are cheaper than brushless motors
  3. They need more energy to run
  4. They are noisier than brushless motors
  5. Brushed motors will save you money on the following items

1. Temporary projects

The brush wear of brushed motors is relatively high. They need regular maintenance and brushes need to be replaced. If your ongoing project may end in a few years, then it is better not to spend more money on DC motors.
Many mechanical projects are temporary, which is why brushed motors are still widely used. Choosing a brush motor that is more economical and can meet the needs is an ideal choice.

2. Items that do not require high noise

Because the noise of brushed motors is greater than that of brushless motors, they are more commonly used in occasions where noise requirements are not high. For example, most factory machinery can use brushed motors, and the noise generated by mechanical operation is much greater than the noise of the motor, and it is not necessary to use a relatively expensive brushed motor.

3. Projects with tight budgets

Needless to say, if your project budget is under, using a brushed motor is your best choice. For large projects, the decision to choose a brushed motor can greatly reduce the expenditure of the entire project.
 
Projects that benefit brushless motors
Brushless motors, due to their unique construction without brushes, do not have a commutator to transmit current to the rotor. Instead, the rotor is triggered by an electronic drive to generate a rotational motion.

Projects that benefit brushless motors

Brushless motors, due to their unique construction without brushes, do not have a commutator to transmit current to the rotor. Instead, the rotor is triggered by an electronic drive to generate a rotational motion.
 
In short, you need to understand brushless motors:
  1. Because there is less wear, the service life is longer than that of brushed motors
  2. The price of brush motors is much higher than that of brushed motors
  3. Runs make quieter sounds because they require less power

The following are the types of projects that are very suitable for brushless DC motors.

Long-term investment projects

The initial investment of the project is relatively large. However, choosing a brushed motor means continuing to replace the motor or parts halfway, which means more maintenance. Choosing a brushed motor means a one-time investment, less failure rate and maintenance. If your project is long-term, it is recommended to choose a brushless motor, and the maintenance will become easier.

Projects that require a quiet environment

In many cases, noise from mechanical movements causes disturbances to the working environment. Brushless motors offer a solution for labs, workshops, and factories that need to be quiet while working. Since it can be energized without brushes and commutators, there is less movement noise during operation. Medical research centers, laboratories and universities often choose brushless motor equipment to minimize noise interference.

Projects that require high precision

Some projects require extreme precision and reliability. Although brushed motors can barely meet the requirements for repetitive projects, brushless motors are used in conjunction with the electrical drive controller to digitally control motion seamlessly.

Corresponding time-sensitive and efficient projects

It is true that brushless motors have the ability to work more efficiently in a shorter period of time, and this is because the electronic control technology behind brushless motors allows them to use less power while increasing energy output. Due to this aspect, brushless motors are more efficient and can therefore withstand faster movements.

Your choice –

Make an informed choice based on your budget, time frame, and the nature of your project. Take advantage of the characteristics of brushed or brushless motors to make the right choice for you.