Multipole magnets have extensive and important applications in many fields:
Industrial field
- Motor manufacturing
Multipole magnets are widely used in the drive motors of modern electric vehicles. For example, Tesla’s high-performance motors use multipole permanent magnets. By precisely controlling the distribution and changes of the multipole magnetic field, efficient conversion of electrical energy and mechanical energy is achieved, which improves the power performance and driving range of the car.
Multipole magnets are also often used in the joint motors of industrial robots, which can provide precise torque output and ensure the accuracy and stability of the robot’s movements when performing complex tasks. - Magnetic separation technology
In mining, multipole magnetic separators use the uneven magnetic field generated by multipole magnets to effectively separate magnetic minerals such as iron ore and manganese ore from gangue minerals. For example, in the beneficiation plant of a large iron ore mine, multipole magnetic separation equipment can greatly improve the grade and recovery rate of iron concentrate.
In the scrap metal recycling industry, multipole magnets are used to separate ferromagnetic metals from urban garbage, realize resource recovery and reuse, and reduce dependence on primary resources. - Nondestructive testing
Multipolar magnetic particle flaw detectors use the magnetic field generated by multipolar magnets to detect cracks, pores and other defects on the surface and near the surface of metal materials. For example, in the aerospace field, regular magnetic particle flaw detection is performed on key components such as aircraft engine blades and landing gear to ensure flight safety.
Medical field
- Magnetic resonance imaging (MRI)
MRI equipment is a commonly used imaging technology in medical diagnosis, and multipolar magnets are one of its core components. Through the precisely designed multipolar magnetic field, a uniform and stable magnetic field environment can be generated to perform high-resolution imaging of tissues and organs inside the human body. For example, in the diagnosis of diseases in the brain, abdomen and other parts, MRI can provide clear images to help doctors accurately judge the condition. - Magnetic therapy equipment
Some magnetic therapy equipment uses the weak magnetic field generated by multipolar magnets to perform physical therapy on the human body. For example, products such as magnetic therapy mattresses and magnetic therapy bracelets claim to promote blood circulation and relieve pain. Although their efficacy is controversial, they still have certain applications in the market.
Scientific research field
- Particle accelerator
In large particle accelerators, such as the Large Hadron Collider (LHC) at CERN, multipole magnets are used to control and guide the trajectory of charged particles. By precisely adjusting the strength and direction of the multipole magnetic field, particles can be moved at speeds close to the speed of light in the accelerator, and particle collisions can be achieved, thereby exploring the mysteries of the microscopic world and studying the basic structure and interaction of matter. - Plasma physics research
In nuclear fusion experimental devices, multipole magnets are used to confine and control high-temperature plasma. For example, the Tokamak device uses a multipole magnetic field to confine plasma in a specific area, so that it reaches the high temperature and density conditions required for nuclear fusion, which makes it possible to achieve controlled nuclear fusion, which is of great significance for solving global energy problems.
Transportation field
- Magnetic levitation train
Magnetic levitation trains rely on the magnetic field force generated by multipole magnets to achieve the suspension and propulsion of the train. By installing multipole magnets on the train and the track, the interaction of the magnetic field is used to enable the train to travel at high speed without contact, greatly reducing friction and energy loss. For example, Shanghai’s maglev train demonstration line, with a maximum speed of 430 kilometers per hour, provides an efficient solution for rapid transportation between cities.