The force-applying component of the ironless motor is placed between two tracks. They are also known as U-slot linear motors. There is no iron core in the coil of the force-applying part, which is called a coreless motor. Its copper winding is encapsulated and located in the air gap between the two rows of magnets. Since there is no iron core in the motor, no attraction or cogging force is generated between the force applying member and the magnetic track.
In addition, the mass of the urging member in the ironless motor is often smaller than that of the urging member in the iron core motor, so that the motor of this structure can generate a large acceleration, so that the overall dynamic performance of the motor is very good. The coreless structure has no cogging and attraction effects, so it can increase the service life of the bearing and, in some cases, even smaller bearings.
Because the ironless motor structure has excellent dynamic performance, it does not have cogging during motion, so it is very powerful, but their heat dissipation efficiency is not as good as that of a core motor because the contact area is small, from the winding base to The heat transfer path of the cooling plate is long, so the full load power of these motors is low. In addition, the double row magnet structure used to achieve the proper force and stroke also increases the overall cost of this motor.
Advantages and disadvantages of U-slot linear motor structure:
Advantages: 1, unattractive - balanced dual track, safe, easy to operate, no attractive problems in the assembly process.
2, no cogging effect - no iron core force parts have no cogging effect.
3, light force parts - because there is no iron core, so the acceleration and deceleration is greater, the mechanical bandwidth is also higher.
4. Air gap adjustment - easy to align and install.
Disadvantages: 1, heat dissipation - higher thermal resistance.
2. The power of the unit product package - the effective value power is lower than that of the iron core structure.
3, higher cost - the number of magnets used is twice that of iron core motors
4. There are two types of ironless motors available on the market, including component sets and prefabricated positioning systems.
Our U-type ironless linear motors (linear motors, linear motors) are used in servo systems to provide standard magnetic rails. The stroke can be extended indefinitely. It can be made into a platform system, multi-axis system, and customers can install directly into the equipment. . At the same time, it can also be customized according to customer needs. The U-channel linear motor of Tongmao motor standard series has a peak thrust of 2600N and a continuous thrust of 750N. Its positioning accuracy can reach 0.5UM, and it can be compatible with multi-brand motion controllers and drivers.
