Overview of High Overload Motors

Beyond the standard rated operations, there exists a recognized exigency for electric motors possessing heightened overload capability, notably in contexts involving powerful electric propulsion of green transport, fast actuation of large robot systems, and durable electric drives of machining tools. Through preceding empirical studies and practices, motor designers and engineers have commonly acknowledged that modern electric motors with augmented overload tolerance for prolonged intervals not only benefit drive systems through decreased volume and costs but also contravene thresholds of reliability and safety. Developing motors with robust overload potential remains a timely topic, yet analyses exploring technical routines to address this subject are sparsely found. Revealing mechanisms between physical domains in the design stage, this comprehensive review article surveys four dominant approaching routes to construct high overload motors - in electrical, magnetic, mechanical, and thermal realms. Meanwhile, the paper summarizes pertinent emerging technologies that may actualize such routes. The observations provided herein should foster the efficient and dependable functioning of heavy industrial electrical machinery across a more extensive panoply of sectors.