Abstract
This paper introduces and investigates a new design method that employs both teeth arrangement and pole–slot combination to reduce the detent force of permanent magnet linear synchronous motors (PMLSMs) for precision position control. The proposed topology is a 10-pole, 12-slot-based PMLSM comprising two sections that significantly reduce the detent force without implementing a skewing design. It was analytically and experimentally confirmed that the proposed design effectively reduces detent force with a negligible sacrifice of mover length. The general characteristics and servo performance of the proposed PMLSM were experimentally examined and then discussed.
Highlights
A combination of a servo motor and a rotary-to-linear conversion mechanism, such as ball-screw or rack–pinion, remains one of the most common choices in various industries to realize linear motion
Considering the nature of the detent force of a permanent magnet linear synchronous motors (PMLSMs), it can be intuitively understood that the implementation of a single design technique is not sufficient to reduce the detent force to a certain level
In this paper, a new design strategy is proposed that employs both teeth arrangement and pole–slot combination together
Summary
A combination of a servo motor and a rotary-to-linear conversion mechanism, such as ball-screw or rack–pinion, remains one of the most common choices in various industries to realize linear motion. Due to the intermediate mechanical transmission components, this indirect linear motion system has inherent issues with friction, wear, noise, vibration, conversion losses, backlash, and limitation of speed and travel distance Because of these limitations, direct-drive permanent magnet linear synchronous motors (PMLSMs) have been successfully employed in a wide variety of industrial applications. Results are presented from investigations of a viable design strategy by which to reduce detent force effectively This was completed by incorporating a teeth arrangement and pole–slot combination that does not require a skewing design, or other reduction technique, to reduce the cogging force. This is because a good selection of the pole–slot combination leads to a low cogging force component
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