Flat direct drive motor ▲▲▲
▲ Flat linear direct drive motors can have a coreless (top), slotted core (intermediate) or slotless core (bottom) construction.
The coreless flat direct drive motor has a flat magnet (secondary part) with a primary part or indenter consisting of a coil mounted on an aluminum plate. These motors have excellent speed control but produce less force than other types of motors. Another structural variant of a coreless motor uses two tracks (sometimes referred to as U-shaped channels or hollow core linear motors) with secondary components or rams located between the magnet tracks. Since these motors have no cogging, they can produce very high acceleration and deceleration.
A cored direct drive motor can be slotted or slotless, with a slotted core design being a more common variant. The secondary portion of the slotted core linear motor consists of a base and iron teeth or laminations around which the coils are wound. They have the greatest output capacity, but the cogging effect is more obvious.
The grooveless design is considered to be a mixture of ironless cores and traditional slotted core designs because their coils are wound without a core layer and are mounted on the back of the iron plate, and their secondary components are usually mounted in aluminum. In the outer casing. These motors have smaller cogging and lower inertia than slotted core designs, but their output forces are relatively small.
Another form of flat direct drive motor is a linear stepper motor.
Tubular linear direct drive motor ▲▲▲
Another structural change in direct drive linear motors is to house the magnets in a cylindrical tube and house the windings in a press or thrust block that surrounds the tubes. Like their flat counterparts,
Tubular linear motors can be constructed with or without a core in a secondary portion (ie, a core or an ironless core). The main advantage of a tubular linear motor is that its symmetrical design allows all magnetic flux to be used to generate thrust.
▲The tubular direct drive direct drive motor can be iron core or ironless core. They offer an alternative to pneumatic and ball screw actuators with high speed and high thrust capability
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