A DC geared motor is a common power transmission device that converts the output of a high-speed, low-torque DC motor to a low-speed, high-torque output. DC geared motors work on a relatively simple principle, and the following is the basic principle.
A DC geared motor consists of two parts: a DC motor and a speed reducer. The DC motor part generates a magnetic field between electromagnets by means of an electric current, so that the current in the wire is rotated by the Lorentz force. The reducer part, on the other hand, realizes the deceleration effect through gears, chains and other transmission devices.
The specific working principle is as follows:
1. DC motor part: when the DC motor works, the current passes through the armature coil and generates a magnetic field between the electromagnets. After energized, because the direction of the current is different from the direction of the magnetic field, the armature coil starts to rotate according to the action of Lorentz force. DC motors usually use permanent magnet DC motors with permanent magnets as the magnetic field source or excitation DC motors with induced magnetic field.
2. Reducer section: The reducer converts the high speed, low torque output of the DC motor to the desired low speed, high torque output through a transmission device. Common transmission devices include gears, chains, pulleys and so on. When the DC motor rotates, the gears or chains in the reducer will transfer the power to the output shaft, thus realizing the deceleration effect.
It should be noted that different reduction ratios and torque outputs can be realized by reasonably selecting and configuring the size and number of gears in the reducer. The reduction ratio is the ratio of the rotational speeds of the drive shaft and the output shaft. The larger the reduction ratio, the lower the rotational speed of the output shaft, while the torque increases accordingly.
DC geared motors are characterized by easy control, large starting torque, and a wide range of speeds, so they are widely used in various fields. For example, they are commonly used in machine tools, conveyors, automated production lines, household appliances and other applications. Through deceleration, DC geared motors can meet the different needs of various mechanical equipment and provide stable and reliable power transmission.
