Brush DC servo motors can be classified into high-voltage and low-voltage categories based on their operating voltage. These two types of servo motors differ in terms of application scenarios, performance characteristics, and suitable industries.
A brushed DC motor is a type of electric motor powered by a direct current (DC) source. It uses a mechanical commutator to reverse the direction of current in the motor windings, enabling continuous rotation.
When DC power is applied, current flows through the brushes, commutator, and into the rotor windings, creating an electromagnetic field. The stator provides a fixed magnetic field for interaction with the rotors field. According to the Lorentz Force Law, a current-carrying conductor in a magnetic field experiences a force.
The interaction between the stator’s magnetic field and the electromagnetic field generated by the rotor windings creates torque that causes the rotor to spin.
Yes, brushed DC motors are very suitable for low-speed, high-torque applications. Brushed DC motors have high starting torque, and their simple structure and control make them effective for low-speed operations with significant torque output.
Typical Applications:
Power tools, automotive windshield wipers, and rolling shutters.
Not ideal for continuous long-term operation.
Prolonged operation can lead to excessive brush wear, commutator carbon buildup, and overheating.
They can be used, but additional control components are necessary.
Brushed DC motors are inherently easy to control in terms of speed, but they lack built-in feedback mechanisms for precision.
Attach an encoder or Hall sensor to enable closed-loop control.
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