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Publication Date: 09/1/2011
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Bosch: New Ironless Linear Motors
Ironless linear motor.
Charlotte, NC — New ironless linear motors by Rexroth position small masses with superior precision and maximum synchronization. Not only are the motors in the MCL ironless product line extremely dynamic, they are also easy to integrate into machines. Typical areas of application include assembly and handling technology as well as semiconductor and solar technology.

The MCL product line is comprised of four sizes with graded lengths and a maximum force range from 20 to 1,700 newtons. This enables an acceleration of up to 300 m/s2 and a maximum speed of up to 1,200 m/min. To increase performance even more, several primary components can be set up in a sequence or parallel to each other. The compact design provides different mounting planes for mounting primary and secondary parts, providing the highest flexibility in construction design.

Optionally, the linear motors also come with a Hall sensor unit to detect the position for the initial commutation.

Compared to ironcore motors, the MCL product line of linear motors distinguish themselves with the ironless design of the primary part, which contains the three-phase winding. The three-phase copper winding is completely compound-filled and not inserted into an iron core. The primary part carrier is made of aluminum and is used to mount the primary component and for heat removal. The U-shaped secondary part contains permanent magnets and encloses the primary component. This design means that slots cannot cause an attraction or cogging force between the primary and secondary part. The force constant is linear due to the eliminated saturation effect. This makes it possible to use compact, cost-effective rail systems.

Typical areas in which ironless linear motors can be used are applications where it is important to move small masses at the maximum possible cycle speed with extremely high precision. That includes pick-and-place machines used in the semiconductor segment as well as those used in general automation processes. The exceptionally high synchronization of the MCL motors also makes them suitable for use in measuring or laser structuring machines for solar technology.

Contact: Bosch Rexroth Corporation, 14001 South Lakes Drive, Charlotte, NC 28273 800-322-6724 fax: 704-583-7294 Web:

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