The DC gear motor is a special motor that combines a DC motor and a gear reducer to provide a lower speed and a larger torque. This motor is based on an ordinary DC motor and is equipped with a matching gear reducer. It uses the function of the gear reducer to provide a lower speed and a larger torque. The gear reducer achieves a speed reduction and a torque increase between the input shaft and the output shaft of the motor through the meshing of gears of different sizes. DC gear motors are usually used in transmission equipment that requires low speed and high torque, such as automated mechanical equipment. The purpose of deceleration is achieved by transmitting the motor or other high-speed transmission equipment to the gear of the output shaft through the reducer.

‌1.Fine transmission ratio grading, wide selection range, and wide speed spectrum, which means that the appropriate reduction ratio can be selected according to specific application requirements to achieve the required torque and speed.

‌2.Compact structure, small size, beautiful appearance, and strong overload resistance. These characteristics enable DC gear motors to save space while meeting certain load requirements.

‌3.Low energy consumption, low noise, energy saving and environmental protection, low vibration, these properties make the DC gear motor more efficient during operation and reduce noise pollution to the environment.

‌4.Strong versatility, easy maintenance, low maintenance cost, especially for production lines, only a few internal transmission parts need to be spared to ensure the normal production of the entire line, which greatly reduces the cost of maintenance.

5.Adopting modular design and sealing device, it has good protection performance and strong environmental adaptability, which enables the DC gear motor to operate stably in various environments.

‌1.Changing the excitation current: By adjusting the size of the excitation current, the magnetic flux inside the motor can be changed, thereby affecting the speed of the motor. Reducing the excitation current can reduce the magnetic flux, thereby increasing the speed of the motor. The advantages of this method are simplicity and low loss, and convenient control, which can achieve smooth speed regulation. However, it should be noted that the mechanical characteristics of the motor will become softer during weak magnetic speed regulation. If the load torque is still the rated value when the speed increases, the motor may be in an overloaded state, so the load torque should be appropriately reduced to maintain constant power speed regulation operation.

2.Change the armature voltage: By adjusting the voltage across the armature, the speed of the motor can be directly controlled. Reducing the armature voltage will cause the motor speed to decrease, while increasing the armature voltage will increase the motor speed. This method can achieve stepless speed regulation with a wide speed regulation range, and the hardness of the mechanical characteristics after speed regulation can remain unchanged. However, this method requires a set of dedicated DC power supply or DC voltage regulator, which is expensive.

3.Change the resistance in the armature circuit: The motor speed is adjusted by connecting a resistor in series or in parallel in the armature circuit. Adding additional resistance in the armature circuit can reduce the speed. This method is simple and the original system is not changed much, which is suitable for situations where power needs to be reduced. However, this method has high requirements for speed regulation accuracy and is not suitable for occasions with large load changes.

‌4.Application fields of DC gear motors

1.Industrial automation equipment: DC gear motors play an important role in industrial automation equipment, such as transmission devices, mixers, pumps, etc. on production lines, which realize the automatic operation of production lines by driving transmission belts or chains.

‌2.Power tools: In the field of power tools, DC gear motors are widely used in tools such as electric screwdrivers and electric grinders to drive tool heads for automatic operation.

‌3.Health care equipment: In health care equipment, DC gear motors are used to drive transmission mechanisms such as infusion pumps and syringes to achieve automatic operation.

‌4.Electric vehicles: In the field of electric vehicles, DC gear motors are used to drive electric vehicles, electric bicycles, etc. to drive wheels.

‌5.Household appliances: In household appliances, DC gear motors are also widely used, such as air conditioners, washing machines, refrigerators and other products, gradually replacing the original asynchronous motors to provide low-noise and high-efficiency solutions.

‌6.Computer industry‌: In the computer industry, DC gear motors are widely used in printers, scanners, hard disk drives, optical disk drives and other equipment to ensure the stable operation of the equipment.

‌7.Military equipment‌: In the field of military equipment, DC gear motors are also widely used, including missiles, artillery, satellites, spacecraft, radars, tanks and other occasions.

8‌.Daily life‌: In daily life, the application of DC gear motors is also ubiquitous, such as automatic doors, automatic curtains, towel machines and other equipment, as well as electric toothbrushes, etc.

Source:https://steppermotor1.livedoor.blog/archives/4498713.html