Chongqing Great Wall Technology Co., Ltd. is one of the leading manufacturers and suppliers of u channel magnet linear motor in China, also supports customized service. Welcome to wholesale high quality u channel magnet linear motor for sale here from our factory.
In order to have a direct drive linear motor without some of the behaviors of the iron core type motors, U-Channel motors were created. The absence of iron from the motor's crucial areas is one of its primary characteristics. This gets rid of cogging and the non-linear force-current relationship brought on by magnetic saturation. A second set of permanent magnets in a double-sided arrangement has been added to the motor to improve the amount of force it can produce. Additionally, the non-ferrous forcer plate, which is normally constructed of aluminum, has electromagnetic coils affixed to it using epoxy.
The U-channel motor offers benefits and drawbacks that the designer must take into account when choosing a motor, just like the iron core motor. Depending on the available space, this motor type can be positioned either vertically or horizontally and normally has a rectangular shape. To fit in places with a restricted amount of height, the motor may have a low, flat design. The U-channel motor type's lack of cogging is another benefit. There are a few drawbacks to the U-channel motor, as there are with everything.
Two parallel magnet tracks with the force between the plates are facing each other in U-channel linear motors. A bearing system supports the forcer in the magnet track. Because the forcers are ironless, no attractive or disruptive forces are produced between the forcer and magnet track. Because the ironless coil assembly has a low mass, it may accelerate very quickly.
The coil winding is typically three-phase and uses brushless commutation. The engine can be given additional air cooling, and there are even water-cooled variants available, to increase performance. Because the magnets are arranged in a U-shaped channel and face one another, this design is better suited to minimizing magnetic flux leakage. Additionally, the layout reduces the possibility of harm from the strong magnetic attraction.
The length of the cable management system, the available encoder length, and the capacity to make large, flat structures are the only factors limiting the operational length of the magnet tracks, which can be combined to enhance the length of trip.
Advantages
- Lower inherent stiffness - Compared to the other two motor types, the motor's inherent stiffness is much lower when the coils are linked to the forcer via an epoxy molding. This is a result of the epoxy's material stiffness and the electromagnetic coils' form factor. The coils' orientation must present a weaker shape to the direction of force generation in order for them to engage with the permanent magnets. One of the factors contributing to the U-channel motors' lesser force output compared to iron core motors is their reduced rigidity.
- Reduced heat dissipation - By removing iron from the motor's magnetically active regions, a second row of magnets is installed, increasing the motor's force output. This second row of magnets is created using a U-channel construction. Air flow in the coils, where heat is produced, is reduced by the use of the U-channel and the coils that are housed inside during operation. Additionally, compared to iron, the epoxy mounting system has extremely little thermal conductivity. Reduced heat transport is the outcome of these two causes. To control the heat accumulation in the engine due to this limited heat transfer, a heat sink is frequently included.
- Lower operating temperature - The operational envelope of the motor is constrained by the low heat transfer of the motor from the areas that produce the heat. The coils' mounting is to blame for this. Epoxies and plastics are a class of materials with low operating temperatures. Even while they might not ignite at temperatures that are typical for other motors, they will lose a lot of their material's stiffness and strength at these high temperatures. U-channel motors operate at lower temperatures than other linear motor types in order to preserve motor integrity and performance.
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