JESSICA部落格

1.Definition of AC gear motors
AC gear motors are a type of equipment that combines an AC motor and a gear reduction device. It drives a closed transmission gear reduction device (also known as a reduction motor or reduction motor) through a motor to reduce the speed and increase the torque to meet the needs of mechanical equipment. This type of motor product has the characteristics of small size, high torque and low noise. It is a key component in the field of automation and the first choice for transmission machinery companies. AC gear motors achieve the purpose of deceleration by transmitting the motor or other high-speed transmission equipment to the gear of the output shaft through a reducer. They are generally used for transmission equipment with low speed and high torque. This type of motor realizes the mutual conversion of mechanical energy and AC electric energy through an integrated and assembled reduction transmission mechanism, meeting the needs of modern industry for efficiency and convenience.

2.Working principle of AC gear motors
The working principle of AC gear motors mainly involves the working principle of AC motors and the function of gear reducers. The working principle of AC motors is to generate a rotating magnetic field in the stator winding through three-phase AC power. This rotating magnetic field cuts the rotor winding, thereby generating an induced current in the rotor winding. ‌For a three-phase AC motor, when the three-phase stator winding is connected to the three-phase AC, a rotating magnetic field is generated, which cuts the rotor winding and generates an induced current in the rotor winding. ‌This rotating magnetic field interacts with the induced current in the rotor to generate electromagnetic torque, which drives the motor to rotate. ‌AC motors are divided into synchronous motors and asynchronous motors, of which synchronous motors are mainly used as generators, while asynchronous motors are mainly used as motors. ‌

Gear reducers are a mechanical transmission device used to reduce speed and increase torque. ‌Gear motors achieve the purpose of deceleration by transmitting the motor or other high-speed transmission equipment to the gear of the output shaft through a reducer. ‌Gear reducers can be composed of a series of gears, and the effect of deceleration and torque increase is achieved through the meshing between gears of different sizes. ‌

Therefore, the working principle of AC gear motors is to reduce the rotational power of AC motors through gear reducers to provide greater torque. This combination not only takes advantage of the efficiency and high performance of the AC motor, but also achieves precise control of the speed and torque through the gear reducer

3.Advantages of AC gear motors
1.Low energy consumption and superior performance: The efficiency of the AC gear motor is as high as 95%. The gears are made of high-strength low-carbon alloy steel after carburizing and quenching. The tooth surface has high hardness, and the CNC gear grinding process is used, which has high precision and good contact, thus ensuring its superior performance1. ‌
2.Low vibration and low noise: Due to the selection of high-quality steel and rigid cast iron housing, and the high-frequency heat treatment of the gear surface, the AC gear motor has low vibration and low noise during operation, which is 10db lower than its peers1. ‌
3.Space saving, reliable and durable: The AC gear motor is designed with practical space saving in mind. It has a simple structure, is easy to disassemble and install, and has a high overload capacity. The power can reach more than 95KW1. ‌
4.Easy to maintain: The motor part of the AC gear motor has a relatively simple structure, without a steering gear and brushes, so it is easy to manufacture, relatively strong, and easy to maintain ‌
Widely used: AC gear motors have a wide range of adaptability in the industrial field, such as automated production lines, textiles, plastics, food processing and other industries, as well as special applications such as solar trackers and wind turbines3. ‌
5.High-precision processing: The AC gear motor is precision-processed to ensure positioning accuracy, form a mechatronics configuration, and ensure the quality of equipment use1. ‌
6.Energy saving and environmental protection: With the development of AC technology and the development of new materials, as well as the proposal and improvement of vector control technology, the control of AC motors can be equivalent to the control method of DC motors, eliminating a large number of harmonics and reducing torque pulsation, making AC gear motors also have significant advantages in energy saving and environmental protection4. ‌

4.Development direction of AC gear motors
1.Improve efficiency: An important goal of the AC motor industry is to improve efficiency and reduce energy consumption and temperature rise. The country has formulated energy efficiency rating standards for AC motors, setting IE3 as the minimum standard and IE5 as the super-high level. By adopting advanced design and manufacturing technologies, such as brushless DC motors, permanent magnet synchronous motors, and sensorless sensor control technology, the efficiency of AC motors can be improved, thereby saving a lot of electricity, reducing carbon emissions, and complying with the country's energy conservation and emission reduction policies. 
2.Enhanced reliability: Improving the life and stability of AC motors and reducing failures and repairs is another important goal. By adopting advanced design and manufacturing technologies, such as brushless DC motors, permanent magnet synchronous motors, and sensorless sensor control technology, the reliability of AC motors can be improved. High-reliability AC motors can improve production efficiency and safety and reduce operating costs and risks. 
3.Intelligent control: Realizing intelligent control and monitoring of AC motors and improving the performance and adaptability of AC motors are new development trends. Intelligent AC motors can realize functions such as automatic adjustment, fault diagnosis, and remote control to adapt to different working environments and needs. By utilizing emerging technologies such as the Internet of Things, cloud computing, big data, and artificial intelligence, we can make AC motors intelligent and improve their performance and adaptability.

Source：https://plaza.rakuten.co.jp/stepperonline/diary/202408160000/