Common Formulas and Applications of Micro Motors

A miniature geared motor is a small, lightweight electric motor. A small gearbox is installed in front of the output shaft of an AC motor to reduce speed and increase torque, thus meeting the working requirements of various products and equipment. For precise drive applications, the selection of a miniature motor should consider the following points:

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1. Calculate the torque requirements and installation space, and select the appropriate motor model based on the torque requirements and installation space.2. Torque = 9550 × Power ÷ Power Input RPM × Speed Ratio × Utilization Factor

3. Power = Torque ÷ 9550 × Power Input RPM ÷ Speed Ratio ÷ Utilization Factor

For example, a 0.75W micro motor with an input speed of 10,000 rpm can generate 9550 × 0.5 ÷ (10000 ÷ 15) = 10.7 Nm.

4. The selection of a miniature geared motor should match the motor mounting flange, because motors are classified according to their mounting flanges, and gearboxes are also modeled according to their mounting flanges.

5. Different application scenarios have different requirements for micro motors. For example, power tools require large torque and high speed, while electronic devices require small size and low energy consumption.

6. Determine the rated voltage and output speed, and calculate the required reduction ratio based on the output speed in order to select a suitable gearbox. Selecting the appropriate power is a basic factor for normal operation and an essential component for maximizing its performance.

Reduction ratio calculation:The reduction ratio of a micro motor, also known as the transmission ratio of a speed reducer, refers to the ratio of the instantaneous input speed to the output speed in the speed reduction mechanism. Assuming the input speed of the micro motor is 10,000 rpm and the output speed of the speed reducer is 100 rpm, then the reduction ratio is 100:1. The calculation method is: micro motor output speed ÷ speed reducer output speed.

Select the appropriate motor based on the load requirements of the equipment, including the required torque and power.

Formulas for calculating motor power and torque:That is, T = 9550*P/n

In the formula: P — power, kilowatts (kW); n — rated speed of the motor, revolutions per minute (r/min); T — torque, Newton-meters (N·m), 9550 is considered a constant.

Torque calculation plays a significant role in the lifespan of a speed reducer, so it is crucial to ensure that the maximum torque value of the acceleration does not exceed the maximum load torque of the speed reducer.

As mentioned above, selecting a micro motor is a complex process that requires comprehensive consideration of specific needs and conditions, such as choosing the appropriate micro motor model and specifications based on actual requirements.

II. Application scenarios

Miniature gear motors have advantages in many different applications. They can adjust the speed according to different working requirements to achieve the best results. Let’s take a look at the working conditions in which they are applied.

Industrial production

Miniature geared motors are widely used in industrial manufacturing to control the speed and operating status of mechanical equipment. By adjusting the motor speed, different production needs can be met. For example, in the food processing industry, the speed of the geared motor can be adjusted according to different food types and processing techniques to achieve the best results; in the textile industry, the speed of the geared motor can be adjusted according to different yarn types and spinning processes to achieve the best results; and in conveyor belt equipment, the speed can be adjusted according to the actual needs of the user, avoiding energy waste and effectively improving production efficiency and flexibility.

Electronic devices and home appliances

Gear motors are used in many electronic and household appliances, such as washing machines, electric fans, and soy milk makers. By adjusting the motor speed, different working needs can be met, providing better performance and energy-saving effects.

Adjustable transmission system

Miniature geared motors are widely used in adjustable transmission systems, such as gearboxes and variable transmission ratio mechanisms. These systems can adjust the transmission ratio according to changes in load and operating conditions to provide optimal performance and efficiency.

Automation systems and robots

Miniature geared motors enable precise positioning and operation of robots, controlling the movement of robotic arms and mobile platforms. By adjusting the motor’s speed and torque, the efficiency and precision of automated systems can be improved.

Agricultural sector

It plays an important role in feed processing equipment, irrigation systems and livestock breeding. By reasonably adjusting the motor speed and power output, the operation of equipment such as mixers and water pumps can be flexibly controlled according to the water and feed requirements of agricultural animals, so as to achieve energy saving and improve production efficiency.With the continuous development of technology, the application scenarios of micro motors will become more and more extensive. They have different applications in various fields, and their speed can be adjusted according to different working requirements to achieve the best results.

Post time: Jan-28-2026