Difference and difference between DC brushless motor and DC brush motor

Many friends can’t tell the difference between brushless DC motors and brushed motors, but they are curious to know what the difference is

What is the difference between DC brushless motors and DC brushed motors can be analyzed from these two aspects.

1. Different working principle

The working principle of brushless DC motor: attaching magnetized permanent magnets to the rotor of the motor, detecting the polarity of the motor rotor, controlling the starting, stopping and braking of the motor by the driver; controlling the switching of each power tube of the inverter bridge to generate continuous torque; and controlling and regulating the rotational speed, providing protection and display, etc.

The working principle of DC brush motor:When the motor rotates, the carbon brushes slide on the commutator to produce a rotating magnetic field, which is attracted by the static magnetic field of the stator. The current in the armature and stator windings is supplied by a battery or other DC power source to provide a constant DC voltage to the battery (or DC power source).

2. Different structural composition

Brushless DC motor consists of motor body and driver, the motor stator winding is mostly made into three symmetrical star connection, and the driver is composed of power electronics and integrated circuits.

The basic components of brush DC motor include stator, rotor, brush and commutator. The stator and rotor magnetic fields interact to drive the motor rotation.

DC brushless motor and DC brush motor differences and differences, here from the working principle and structural composition to analyze, I hope it can help you!

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