Application of NdFeB permanent magnet in new energy vehicles

Many applications of neodymium iron boron have been introduced before, such as the application of high-performance neodymium iron boron permanent magnetic materials in the robot field, the application of neodymium magnets in electrical appliances, and the application of neodymium magnets in headphones. Today, we will introduce the application of neodymium 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 drive motors of new energy vehicles. Drive 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 because of their wide speed range, high power density, small size and high efficiency. NdFeB permanent magnet has the characteristics of high magnetic energy product, high intrinsic coercivity and high remanence, which can effectively improve the power density and torque density of the motor, and is widely used in the rotor of permanent magnet motor.

EPS (electric power steering system) is a component (0.25kg/vehicle) that uses the most permanent magnets except for the drive motor. The power micro motor in EPS is a permanent magnet motor, which has high requirements on performance, weight and volume. Therefore, the permanent magnet materials in EPS are mainly high-performance sintered or hot pressed iron iron boron magnets.

In addition to the driving motor, the motors on the new energy vehicles are all micro motors. Micro motors have low requirements for magnetism. At present, they are mainly made of ferrite. However, the efficiency of the motor using NdFeB is increased by 8~50%, the power consumption is reduced by 10%, and the weight is reduced by more than 50%, which has become the future trend of the development of micro motors.

The car speaker is also a scene where the  neodymium magnet is applied to new energy vehicles. The performance of the permanent magnet has a direct impact on the sound quality of the speaker. The higher the magnetic flux density of the permanent magnet, the higher the sensitivity of the speaker, and the better the transient state. Generally speaking, the speaker is easy to make noise, and the sound is not muddy. The speaker permanent magnets on the market mainly include aluminum nickel cobalt, ferrite, and ferroboron, The magnetic properties of ferroboron are far better than those of aluminum nickel drill and ferrite, especially for high-end speakers.

All kinds of sensors on the vehicle are also a scene where Ndfeb permanent magnets are applied to new energy vehicles. The sensors using permanent magnets mainly include distance sensors, brake sensors, safety belt sensors, etc. They mainly use Hall sensors. In Hall sensors, permanent magnets are used to generate magnetic fields to make Hall elements generate offset currents, thus generating electromotive force. With the development of Hall sensors, they are miniaturized and integrated. The selection of permanent magnets tends to select ferromagnetic boron permanent magnets with good magnetic properties and small size.

The above is a full introduction to the application of NdFeB permanent magnets in new energy vehicles. It was compiled by the Chinese magnet manufacturer, Courage Xiaofu. Please contact the online customer service website for the quotations and samples of motor NdFeB arc magnets, multi pole magnetic rings.

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