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How to consider the specifications and types of magnets

When choosing NdFeB magnets, customers should choose the magnet trademark suitable for them according to their working temperature. If the working temperature is higher than the...

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How does the physical quantity inside the DC motor change during weak magnetic speed regulation?

1. During weak magnetic speed regulation, the physical quantity inside the motor changes as follows: the armature voltage decreases because the armature electromotive force decreases at this time; At this point, if the load remains constant, the current will increase. Because it is necessary to maintain the load torque unchanged.2. For constant excitation DC motor speed regulation, the higher the armature voltage, the higher the motor speed. It is a proportional relationship. For constant torque speed regulation, no further increase is allowed after the armature voltage reaches the rated value. At this point, if you want to increase the speed again, you need to weaken the magnetic field. At this time, it is a constant power speed regulation. Namely, power=speed X torque. As the speed increases, the torque decreases.The relationship between torque, current, and magnetic flux (excitation): Motor torque=armature current X magnetic flux. If the magnetic field is weak and the armature volta

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2023-09

Introduction to the Function and Material of Magnets in Automotive Gear Position Sensors

A gear sensor, also known as a gear switch sensor, is generally equipped in an automatic transmission and is mainly used to detect gear signals. It is usually assembled from the rotor and housing, and the rotor includes a magnet part. So what role does the magnet play in it? What is the material of the magnet?Magnets mainly serve to provide a magnetic field and are mostly made of injection molded magnetic (plastic magnetic) materials. The sensor is installed on the gearbox housing, and the matched shift shaft drives the magnet to rotate together. The sensor outputs different signals through the magnetic field changes emitted by the magnet, which are fed back to the TCU.The above is an introduction to the functions and materials of magnets in automotive gear sensors. Our company is a professional supplier of motor magnets, providing processing and manufacturing of various sensors and encoder magnets. We can produce multipole magnets with various performance and materials according to cu

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2023-09

Application of Neodymium Iron Boron Permanent Magnets in New Energy Vehicles

New energy vehicles mainly include hybrid electric vehicles and pure electric vehicles. High performance iron iron boron permanent magnet materials are mainly used in driving motors of new energy vehicles. The driving motors suitable for new energy vehicles mainly include permanent magnet synchronous motors, AC asynchronous motors, and switched reluctance motors. Among them, permanent magnet synchronous motors have become mainstream motors due to their wide speed range, high power density, small size, and high efficiency. Neodymium iron boron permanent magnets have the characteristics of high magnetic energy product, high intrinsic coercivity, and high remanence, effectively improving the power density and torque density of motors, and are widely used in permanent magnet motor rotors.EPS (Electric Power Assisted Steering System) is the component that uses the most permanent magnets besides the driving motor (0.25kg/vehicle). The micro motor used in EPS is a permanent magnet motor, whic

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2023-09

The demand for high-performance neodymium iron boron magnetic materials in traditional automobiles

The main application of high-performance neodymium iron boron magnetic materials in traditional cars is electric power steering (EPS), which plays a crucial role in vehicle stability, comfort, and safety. Automotive power steering systems can be basically divided into three categories, namely mechanical hydraulic power steering system (HPS), electronic hydraulic power steering system (EHPS), and electric power steering system.The development of EPS steering system in China's automotive industry is slightly later than that of developed countries in Europe and America. In recent years, the penetration rate of EPS in China's passenger car market has rapidly increased, reaching 96.2% by 2020. However, the commercial vehicle steering system is still mainly composed of HPS and EHPS. Although HPS and EHPS have lower costs, they consume a lot of energy and are prone to damage. Therefore, with the increasingly strict requirements for energy conservation and emission redu

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2023-09

New magnetic materials that can simultaneously replace some neodymium iron boron and ferrite

Significantly reducing production costs, the current price of praseodymium neodymium metal is about 1 million yuan/ton, reaching a maximum of 1.4 million yuan in the first quarter, while the price of cerium metal is only 27000 yuan/ton.The content of cerium in the crust is about 0.0046%, which is the highest abundance among rare earth elements.The new cerium magnet can fill the performance gap between high-performance magnets and ferrite in permanent magnet materials. Its performance is lower than that of neodymium iron boron, but its cost advantage is prominent. Its price is higher than that of ferrite, but its performance advantage is obvious. It can replace some neodymium iron boron and ferrite markets at the same time.We have developed a series of high abundance rare earth magnet brand products, breaking through the limitations of high abundance rare earth magnets concentrated in fields such as magnetic adsorption, magnetic separation, electric bicycles, luggage buckles, door buckl

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2023-09

All you want to know about cutting ferrite magnets is here

1、 How is a ferrite magnet cut?Ferrite cutting and processingFerrite cutting magnets are made from block shaped rough embryos, mainly made of strontium based (Sr) ferrite (Fe2O3). The forming time is longer, but the density is higher. In theory, the larger the block material rough embryo, the better. However, due to the pressure limitations and yield improvement of the machinery itself, the largest material specification is L220xW150x25.4mmT. The ferrite permanent magnet itself can only be processed for its outer diameter and thickness, but cannot be divided. If it is divided, its original performance will change and weak magnetic phenomenon will occur. The outer diameter and thickness are mostly processed by water grinding, and the appearance will change after processing, but the original shape will not change.2、 What is the minimum size of a ferrite cutting magnet that can be machined into?With the improvement of cutting ability, the minimum size that ferrite cutting magnets can cut

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2023-09
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