Intelligent sweeping robots need to be driven by micro DC motors to achieve various functions, such as sweeping, mopping, vacuuming, sensing, etc. Different functions have different requirements for micromotors. For example, the vacuuming function requires a high-speed motor, and the sweeping function requires a high-speed motor. Mopping the floor requires a high-torque motor, so how to choose a sweeping robot motor ? The following is a brief description from Xinda Motor.

  In addition to the vacuum cleaner motor, the driving motor of the intelligent sweeping robot needs to have a deceleration function to increase the torque for better driving. The driving motor is generally a brush DC motor, a brushless DC motor, a coreless motor, a stepper motor, etc., and a gear Most of the reduction structures are parallel gearboxes or planetary gear reduction boxes to increase output torque. The requirements for the micromotor of the sweeping robot are low noise, high torque, prevention of hair and other entanglements from entering the motor, and service life requirements.

  The following are the advantages and disadvantages of several common sweeping robot motors

  1) Brushed DC motor

  At least 3 to 5 brushed DC motors are used in sweeping robots. The brushed DC motor is a type of DC motor. Its structure is that the main magnetic pole and brush are installed and fixed on the stator, and the armature winding and commutator are installed on the rotor. Directional device. The electric energy of the DC current enters the armature winding through the brush and commutator, generating armature current. The magnetic field generated by the armature current interacts with the main magnetic field to generate electromagnetic torque, which causes the micromotor to rotate and drive the load. The common voltage of sweeping robots is 12V. For brushed DC motors, the advantages are low price, simple and convenient control, and large starting torque. The disadvantage is short service life. Generally, the continuous operation time is only about a few hundred hours. Secondly, it is too noisy. The higher the speed, the louder the noise will be, but it will not exceed 50dB.

  2) Brushless DC motor

  The difference between brushless DC motors and brushed DC motors is that there are no brushes and commutators in the structure. Since there is no brush or commutator friction, the continuous operation life can reach thousands of hours and the noise will be relatively low. However, due to Without brushes and commutators, electronic commutation is required to rotate the motor, which results in more complex speed control and high cost, which is generally 1 to 3 times that of a brushed DC motor.

 3) Coreless DC motor

  The structure of the coreless DC motor is very different from other DC motors. It cancels the iron core rotor structure of ordinary DC and has outstanding energy-saving characteristics, convenient and sensitive control and operational stability. This structure completely eliminates It eliminates various mechanical energy losses caused by the eddy current formed by the iron core rotor of ordinary micro DC motors, and at the same time reduces the size and weight of the micro motor. Coreless DC motors are also divided into brushed and brushless structures.

  The above are the micro DC motors commonly used in sweeping robots. For more information about micro DC motors, please continue to pay attention to Xinda Motor.