As urban infrastructure expands, safety regulations in industry backdrop are tightening. Changes in consumer attitudes demand that products we buy have positive attributes leading to growth of all electric aerial work platforms, and even more specifically electric scissor lifts. Electric scissor lifts have a simple structure, can be operated easily, and can be adjusted to operate in both indoor and outdoor applications such as warehouses, transit facilities, malls, entertainment venues, and shop maintenance areas. Sustainability and "green" design is becoming an important global issue and electric scissor lifts, replacing internal combustion and hydraulic-based equipment, are emerging through improvements in technology that is properly standing the test of time.
In electric scissor lifts, motors afford a level of propulsion for the unit and the hydraulic lift system. In comparison to other systems that rely on other sources of fuel or fully hydraulic units, electric drive systems--often in conjunction with other ancillary systems can vastly improve efficiency, reduce preventative maintenance and improve control over speed and load. Given that scissor lifts operate in a stop and go manner, the electric motors used must have a high starting torque capability, wide speed control, provide thermal stability, and long life.
Motor technology today is often characterized--by two distinct methods such as AC Induction Motors and Permanent Magnet
Synchronous Motors (PMSMs). AC motors are well-established and low-cost. AC motors typically and presently dominate entry-level and middle ground equipment applications. PMSMs have much higher power density, typically have a faster response time, and are a more energy efficient source of motive power. Current applications for electric scissor lifts typically use PMSM electric motors in more premium equipment applications where stability, lift accuracy, and predictable runtime is paramount.
Electric scissor lifts typically operate under conditions of frequent load change and variable work environment conditions. For this reason, typically accompanied with motors are intelligent controllers, for example: overcurrent protection, soft start and stop, anti-rollback on incline, and dynamic braking. The trends also show electric motor manufacturers are deploying integrated motor and pump units; this has identified more compact layouts for stacks of hydraulic systems in an area of application, and has also improved serviceability.
The outlook for electric drive development combines technologies such as IoT and AI and are preparing the way for the next generation of scissor lifts that are emission free, smart and autonomous. As the key energy conversion system of the vehicle that affects the lifting purpose, the electric motor, would have an overwhelming influence on efficiency, safety and reliability. Through ongoing improvements in electromagnetic design and thermal management, and digital design in control methods, electric scissor lifts can further develop to electric aerial work platforms that are safer, cleaner and smarter.
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