When it comes to magnets, many people may think of strong magnets, such as NdFeB magnets. But in fact, in the industrial field, there is another classic magnet – AlNiCo magnet. Although it is not as “amazingly attractive” as NdFeB, it has irreplaceable advantages in certain specific fields. 오늘, let’s talk about the application of AlNiCo magnets in motors, sensors and instruments.
What is AlNiCo magnet?
AlNiCo magnets, as the name suggests, are mainly composed of aluminum, nickel, and cobalt, and iron and a small amount of copper or titanium are also added. This kind of magnet is characterized by high temperature resistance, corrosion resistance, strong stability, and can maintain good magnetic properties even in extreme environments. Compared with NdFeB magnets, although it has a slightly weaker magnetic force, it has higher stability, so it is widely used in some equipment with high requirements for magnetic stability.
Application of AlNiCo magnets in motors
Motors are essential equipment in daily life and industrial production. Many precision motors use AlNiCo magnets, such as:
High temperature motors: AlNiCo magnets can withstand temperatures up to **500℃**, while NdFeB magnets usually lose their magnetic properties when they exceed 150℃. 그러므로, motors operating in high temperature environments, such as aerospace, military equipment, power generators, 등., tend to use AlNiCo magnets.
DC motors: The magnetic properties of AlNiCo magnets are very stable and are not easily attenuated by changes in temperature or time. 그러므로, they are suitable for some high-precision DC motors, such as medical equipment motors, precision instrument motors, 등.
Servo motors: In some servo systems that require precise control, AlNiCo magnets are used in certain types of servo motors due to their good magnetic stability.
Application of AlNiCo magnets in sensors
The function of sensors is to convert various physical quantities (such as temperature, pressure, and magnetic field) into electronic signals to help machines “sense” the outside world. Alnico magnets are very common in the following types of sensors:
Magnetic position sensors: used to detect the position and movement of objects, such as steering angle sensors for cars, magnetic switches for access control systems, 등. Alnico magnets have good stability and are not easily invalidated by external interference, so they play an important role in these devices.
Hall effect sensors: Hall sensors can detect changes in magnetic fields to determine speed, position and other information. The stable magnetic field characteristics of Alnico magnets make them an important magnetic source for Hall sensors, such as automotive speed sensors, flow meters, tachometers, 등.
Contactless sensors: In some industrial testing equipment with extremely high precision requirements, Alnico magnets are often used in contactless sensors to ensure that the sensors can work stably.
Application of Alnico magnets in instruments
Alnico magnets can also be found in many scientific instruments and measuring equipment, such as:
Electronic measuring instruments: Equipment such as fluxgates and magnetometers that need to maintain a stable magnetic field for a long time will use Alnico magnets.
Precision laboratory balances: Some high-end electronic balances use Alnico magnets to maintain a precise magnetic field to ensure the accuracy of the measurement data.
Audio equipment: 예를 들어, in some advanced microphones and speakers, AlNiCo magnets can provide a stable magnetic field to ensure the restoration and clarity of sound.
Summary
Although NdFeB magnets now dominate many fields due to their strong magnetism, AlNiCo magnets still have a place in motors, sensors and instruments due to their advantages such as high temperature resistance, stable magnetism and corrosion resistance. Especially in high temperature environments, precision measurements, and long-term stable working equipment, its advantages are irreplaceable.
If you are interested in AlNiCo magnets, please visit the JLMAG website to browse more. We focus on the research and development of new materials. Our main businesses include magnetic materials and magnet components, 자기 생산 장비, motor and waste magnet recycling, overseas rare earth mining and trade, 등.
