A brushless DC electric motor, or BLDC motor, is also called an electronically commutated motor (ECM). These motors are

synchronous and run on a DC electric source. They use an integrated inverter or switching power supply. This setup creates

an AC electric signal to power the motor.

Efficiency is a primary selling feature for BLDC motors. The rotor holds the magnets, so it needs no power. This means there

are no connections, commutators, or brushes.

A brushed DC motor is an internally commutated electric motor designed to be run from a direct current power source.

Brushed motors were the first important use of electric power for driving machines. DC distribution systems ran these

motors in commercial and industrial buildings for over 100 years.

The brushes charge the commutator inversely in polarity to the permanent magnet, in turn causing the armature to rotate.

The rotation’s direction, clockwise and/or counterclockwise, can be reversed easily by reversing the polarity of the brushes,

i.e., reversing the leads on the battery.

The difference between BLDC and brush motor

1. Application:

Brushless motor: it is widely used in the machine which requires high rotation speed and control power.

Brush motor: it is widely used in the motors with carbon brush, like fan motor, power tools etc.

2.Life span

Brushless motor: the life span is more than 1 thousand hours

Brush motor: the life span is within 1 thousand hours.

3.Energy saving:

Brushless motors is far more efficiency and energy saving than the brush motors. For brush motor, it has to change carbon

brush timely, otherwise, the motor might get damaged. 

The Difference Between Brushed DC and Brushless DC Motors

Brushless DC motors (BLDC motors) are advanced, electronically commutated motors. They use a DC power source linked to

an inverter. This inverter creates an AC signal to power the motor.

A key advantage of BLDC motors is their efficiency. The rotor, which holds the magnets, requires no electrical connections,

commutators, or brushes, reducing maintenance needs.

On the other hand, brushed DC motors are some of the earliest electric motors used in commercial applications. They use direct

current power.

Brushes charge the commutator. This interacts with the permanent magnet to rotate the armature. The motor's direction can

easily be changed by reversing the brush leads.

In terms of application, engineers prefer BLDC motors for machines that demand high rotation speeds and precise control. You

typically find brushed motors in devices like fans and power tools.

The lifespan of a brushless motor exceeds 1,000 hours, while brushed motors often last less than that due to wear on the brushes.

Moreover, BLDC motors are more energy-efficient, offering significant energy savings over their brushed counterparts. Brushed

motors require regular maintenance to replace worn-out brushes to avoid damage.