Alternative Linear Motion Systems University （替代线性运动系统大学）.pdf

Alternative Linear Motion Systems ME EN 7960 – Precision Machine Design Topic 5 ME EN 7960 – Precision Machine Design – Alternative Linear Motion Systems 5-1 Iron Core Linear Motors • Provide actuation forces from 30 N (7 lbf) continuous to over 11,000 N (2,500 lbf) peak • Two-part construction features a 3-phase laminated coil and a single sided magnet track consisting of rare-earth magnets mounted on a rigid steel base plate • These linear motors deliver excellent performance in rapid point-to-point positioning applications while virtually eliminating the efficiency- robbing effects of friction, inertia, backlash and wear associated with rotary-to-linear Source: Anorad drive mechanisms ME EN 7960 – Precision Machine Design – Alternative Linear Motion Systems 5-2 1 Iron Less Linear Motors • Provide actuation forces from 8 N (2 lbf) continuous to nearly 2,000 N (450 lbf) peak • Their two-piece assembly features a 3-phase ironless coil and a balanced dual-sided “U” shaped magnet channel • Their ironless coil design eliminates cogging (magnetic détente) and makes them the optimal choice for extremely consistent velocity control in scanning-type applications and allows them to achieve the Source: Anorad highest levels of positioning accuracy, repeatability and resolution ME EN 7960 – Precision Machine Design – Alternative Linear Motion Systems 5-3 Linear Motors • Pros – Direct drive minimizes the