Modeling and Experimental Verification of a Tubular Actuator for 20-g Acceleration in a Pick-and-Place Application

Abstract

Abstract-This paper presents the modeling and the experimental verification of a tubular actuator for a pick and place application. To increase the throughput of a placement robot for printed circuit boards, very fast linear motion is required. A moving magnet tubular actuator with axially magnetized magnets is selected. Using a semi-analytical magnetic field description coupled to thermal models, a design is created that potentially could achieve a translator acceleration of 20 g. A prototype of the designed actuator is built and coupled with a Simulink dSpace system to perform extensive measurements to validate the models and investigate the achievable acceleration within a predetermined motion profile. The electro-motive force is measured, and the disturbance forces are identified. The position error is measured during the motion profile with an acceleration of 20 g and a stroke of 30 mm. Furthermore, thermal measurements are performed to check the achievable duty cycle. The built design shows good agreement with the models, and the specified acceleration of 20 g is achieved.

Dynamic Analysis of a Tubular Generator for Automotive Suspension Applications

“…The mechanical parameters correspond to the values described in [3], [8]. A window of the filtered data is selected in such a way that the first and the last time-step of the displacement profile are equal, indicating a periodic signal, as this guarantees better accuracy of the Fourier transform [9].…”

“…This paper quantifies the error of applying superposition of harmonics to a non-linear problem: the slotless tubular permanent magnet machine, as described in [8], is considered for vibration energy harvesting in automotive suspension applications. In the back-iron of the tubular permanent magnet generator (TPMG) a slit is located to connect the phase wires to the power electronic unit, hence, breaking the axisymmetry and leading to a non-linear problem.…”

High-precision and high-speed positioning of 100G linear synchronous motor

“…One commercially available single-sided, flat PM LSM has an acceleration of 30 G and a velocity of 4 m/s [11]. Iron-cored tubular-PM LSMs have produced accelerations above 20 G and velocities above 1.3 m/s [12,13]. One double-sided, flat PM LSM with iron-cored electromagnets showed an acceleration of 38 G and a velocity of 5 m/s [14].…”

Thrust Ripple Reduction in Ultrahigh-Acceleration Moving-Permanent-Magnet Linear Synchronous Motor

“…They have often been used in high-speed machine tools and wire bonders. Some core-PM LSMs have high thrust to mover mass ratios that can provide accelerations greater than 20 G (= 196 m/s 2 ) [8]- [11]. These high-acceleration linear motors are known as movingpermanent-magnet LSMs (MPM LSMs) because they have a lightweight and wireless mover.…”