There are significant differences between permanent magnet motor and ordinary motor in many aspects，These differences are mainly reflected in the structure、efficiency、Energy conservation、Operating performance、Maintenance and life, etc。Heres a breakdown：

one、Structural difference

• Permanent magnet machine：Mainly by motor controller、The stator and rotor are composed。among，The stator is a permanent magnet，You can generate your own magnetic field without an external power source。This structure enables the permanent magnet motor to have higher energy density and efficiency。

• General electric machine：It is mainly composed of armature and magnetic pole。The armature is energized to produce a current，The current is subjected to a force in a magnetic field, resulting in a torque of rotation。An ordinary motor needs to be equipped with an exciting winding，There is also an inevitable excitation loss during operation。

two、Efficiency and energy saving

• Permanent magnet machine：Because the excitation loss is eliminated，Permanent magnet motors usually have high efficiency。At the same power，The operation efficiency of permanent magnet motors is often higher than that of ordinary motors，This gives it a significant advantage in terms of energy conservation and emission reduction。The energy conversion efficiency of permanent magnet motor is higher，Thus, the overall energy efficiency is improved。

• General electric machine：Electrical energy is consumed to generate a magnetic field，Therefore, its efficiency is relatively low。In terms of energy use，Ordinary motors are not as efficient as permanent magnet motors。

three、Operating performance

• Permanent magnet machine：More stable operation performance，Higher starting torque and higher overload capacity。meanwhile，The speed regulation performance of permanent magnet motor is also more superior，It can realize stepless speed regulation and precise control。These characteristics make permanent magnet motors in need of high precision、The application scenarios with high stability and high speed regulation performance are more advantageous。

• General electric machine：Quick response，Has a large starting torque，Rated torque performance from zero speed to rated speed。however，In terms of speed regulation performance and stability，Ordinary motors may not be as superior as permanent magnet motors。

four、Maintenance and life

• Permanent magnet machine：The maintenance period is relatively long，And the maintenance cost is low。Due to the permanent magnet motor structure and materials are more advanced，It also has a relatively longer lifespan。however，It is also necessary to pay attention to avoid the problem of degaussing permanent magnets in high temperatures or harsh environments。

• General electric machine：Regular maintenance and maintenance is required，Bearing replacement included、Motor cleaning。Maintenance costs can be relatively high，And its lifespan is relatively short。

five、Application scenario

• Permanent magnet machine：Due to its high efficiency、High energy density and good speed regulation performance，Permanent magnet motors have gradually replaced ordinary motors in many fields。Especially in new energy vehicles、Wind power generation、Machine tools and other fields，The application of permanent magnet motor is more and more extensive。In aerospace、Military and other fields，The performance requirements of the motor are higher，The advantages of permanent magnet motors are more obvious。

• General electric machine：Because of its simple structure、Lower cost，Ordinary motors are still the preferred solution in many situations。Especially in the case of large starting torque and low speed operation，Ordinary motors have obvious advantages。

To sum up，Permanent magnet motor and ordinary motor in the construction、efficiency、Energy conservation、Operating performance、There are significant differences in maintenance and life span。When choosing a motor，This topic requires comprehensive consideration based on specific application scenarios and requirements。