permanent magnet synchronous motor mainly by permanent magnet synchronous motor rotor

The structure of the permanent magnet synchronous motor mainly by permanent magnet synchronous motor rotor,end cover,and composed of parts such as stator.In general,the biggest feature is its permanent magnet synchronous motor stator structure with the ordinary induction motor structure is very,very similar,is the main difference in the rotor's unique structure form the difference with other motor.The biggest different and common asynchronous motor is the unique structure of the rotor,the rotor with high quality on the permanent magnet poles.Placed on the rotor position of permanent acmotor2.blogspot.com magnets have many choices,so permanent magnet synchronous motor is usually divided into three categories: embedded,stickers and plug-in,as shown in figure 1.1.The performance of the permanent magnet synchronous motor is one of the most popular,there are many factors that can affect their performance,but the main is the structure of the permanent magnet synchronous motor.In terms of type,plug-in and embedded stick,all sorts of structure are all have their respective advantages. Stickers of the permanent magnet synchronous motor is the most widely used in the industry,its most main reason is electrical motor 12v 1000wthat it has a lot of other forms of motor incomparable advantages,such as its manufacture is convenient,the relatively small rotational inertia and simple structure etc.

And this type of permanent magnet synchronous motor is more easy to be the designer for the optimization of the design,one of the main methods are designed to approximate sine distribution of the air gap flux distribution structure,change the distribution structure to sine distribution can bring many advantages,for example,it brings negative effect,can reduce the harmonics of the magnetic field and the application of the above method can well improve the permanent magnet motors for sale running performance of the machine.Plug in the structure of the motor can compared with stickers of the motor is greatly improved because of its full use of it to design the structure of magnetic chain with asymmetry generated unique reluctance torque can greatly improve the power density of the motor,and can be easily produced,so the structure of permanent magnet synchronous motor is more used in the transmission system,but its shortcoming is also very prominent,such as production costs and compared with the stickers of the magnetic flux leakage coefficient is much larger.Embedded in the permanent magnet synchronous motor of permanent magnet is placed in the interior of the rotor,although in comparison to its structure is more complex,but there are a few obvious advantage is beyond doubt,because there are with high air gap flux density,the obvious compared it with stickers of the motor can produce a large torque;Because in the installation of the rotor permanent magnet is embedded in the choice,so by permanent magnet demagnetization after ac geared motor brought about by a series of dangerous possibility will be small,so the motor can run under higher rotate speed but does not need to consider whether the permanent magnets in the rotor will be destroyed because of the centrifugal force is too large.

To reflect the superior performance of the permanent magnet synchronous motor,compared with the traditional asynchronous motor to permanent magnet synchronous motor in particular,the most common type of rare earth permanent magnet synchronous motor with simple structure,high reliability;Very small volume,light quality special;Loss is relatively small,the efficiency is high;The shape and size of the motor can be obvious advantages such as flexible change.Precisely because it has so many advantages so that its application scope is very broad,almost throughout the aerospace,defense,industrial and agricultural production and daily life and so on each domain.Compared with permanent magnet synchronous motor and induction motor,consider not input reactive excitation current,so can be very obvious enhancement On its power factor,thus reducing the stator current and the stator resistance loss,and at the time of stable operation without the loss on the rotor resistance,which can reduce fan due to reduce the total loss of (small capacity motor can even without a fan) and the corresponding wind mill loss,compared with the same specifications of the induction motor with efficiency can be improved 2-8%.