Long-range Planar Conveyance Device Based On A Digital Electromagnetic Actuator Array

Smart surfaces for micro-conveyance are planar motion devices that transport objects between specific positions. The solutions in this research topic have mainly used analog/continuous actuators with distributed sensors and feedback control schemes to accomplish high precision. Examples of these analog actuators are pneumatic (non-contact) and electrostatic (contact) conveyance systems, but their drawbacks are: complex modeling, control and air feeding logistics for the pneumatic solutions; and pull-in failures and high voltages for the electrostatic solutions. As an alternative, digital electromagnetic actuators offer sensor-less operation, simple control schemes and high precision but require precisely fabricated designs. In this article, we analyze the long-range capability of a digital electromagnetic actuator array prototype. We present the array’s operation principle and electromagnetic model, from which we derive the positives of expanding its active area. We perform experimental tests to demonstrate the long-range capability of the prototype and, based on the model and experimental results, we present and fabricate a modular and scalable design of the array for large active area applications.