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Relationship between motor power size and magnets

The power size of the motor depends on the magnet? Many people want to know the answer, today permanent magnet manufacturers courage magnet small Fu to introduce you to the relationship between the power of the motor and the magnet.

For example, the power of the electric car motor is determined by three parts, one is the magnetic induction strength and area of the magnetic field of the outer ring. The second is the size of the gap between the stator and rotor (reluctance). The third is the magnitude of the power of the current in the stator coil. In the case of the first two factors are the same, the greater the power of the current in the coil the greater the power of the motor ah. So it's not just the size of the magnets, but the effective area and the strength of the magnetism of the magnets and so on.

In a permanent magnet motor, the strength of the magnetic field determines the torque of the motor.

The same size motor, winding data, the magnet steel strength affects the rotation speed low high, out of the power size.

Since the motor is electrical energy rotating energy, the power is determined by the coil, but the strength of the permanent magnet determines the distribution of electrical power into kinetic and thermal energy. The stronger the permanent magnets' magnetism, the more part of the electrical energy is converted into kinetic energy, and the opposite is weaker.

The picture shows a sintered rare earth arc segmented neodymium magnets


There is a relationship between the amount of power in a motor and the magnets, but this is not the only factor that affects motor performance. The size of the motor power is usually determined by the following factors:

1, the strength of the magnetic field (magnetic steel magnetism): the strength of the magnetic field directly affects the performance of the motor. A stronger magnetic field can generate a greater force, which enables the motor to withstand greater loads and provide greater power output. Therefore, the use of high-performance magnets can increase the power of the motor.

2, coil design: the motor's coil design is also an important factor affecting power. The coil size, shape, winding method and material selection will affect the power output of the motor. Reasonable coil design can improve the efficiency and power of the motor.

3, current and voltage: the current and voltage of the motor directly affects the size of the power. Usually, the motor power can be increased by increasing the current or voltage, but at the same time, the rated capacity of the motor and heat dissipation capacity need to be considered in order to avoid overload and damage.

4, mechanical structure: the mechanical structure of the motor also has an impact on the power. For example, the motor's bearings, cooling system and mechanical transmission can all affect power output.

5. Speed: There is an inverse relationship between motor speed and power. Typically, a more powerful motor will provide more torque at a given RPM.

In conclusion, the relationship between motor power level and magnets is complex and involves the interaction of several factors. To increase the power of the motor, it is necessary to comprehensively consider several factors such as the performance of the magnets, coil design, current and voltage, mechanical structure, etc., and make reasonable optimization and adjustment. At the same time, it is also necessary to pay attention to the thermal management of the motor to ensure that the motor will not be overheated and damaged when the power is increased.

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