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What Are Difference of Integrated DC Brushless Motor and Brush Motor

Have already visited: 31004/12/2021  

First, the working principle is different

Integrated DC Brushless motor working principle: The rotor of the motor is glued with magnetized permanent magnets to detect the polarity of the motor rotor, while the driver controls the starting, stopping and braking of the motor; controls the on/off of the power tubes of the inverter bridge to produce continuous torque; controls and adjusts the rotational speed and provides protection and display, etc.

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

What Are Difference of Integrated Dc Brushless Motor and Brush Motor

Second, different structure composition

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

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

What Are Difference of Integrated Dc Brushless Motor and Brush Motor

Integrated DC Brushless motor development history

As early as the nineteenth century, when the electric motor was born, the practical motor produced was the brushless form, the AC squirrel-cage asynchronous motor, and this motor was widely used.

The transistor was born in the middle of last century, thus the Integrated DC Brushless motor with transistor commutation circuit instead of brush and commutator was born, and the defects of the first generation brushless motor were overcome.

DC brush motors have good starting and speed regulation performance, and are often used in applications with high requirements for starting and speed regulation.

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