Frequency inverters are widely used in tower crane hoisting, slewing and luffing mechanisms, replacing traditional speed control methods like wound-rotor resistance control and multi-speed motors to enhance safety, control precision and reliability.

Conventional systems cause severe start-stop shocks, load swinging and accelerated wear of gears, wire ropes and slewing bearings, with risks of hook slipping under heavy loads.

Lifting-specific vector inverters provide stepless smooth speed regulation. With brake sequence and closed-loop control, they supply sufficient low-speed torque to avoid hook slipping.

Flexible acceleration and deceleration reduce jib swinging, enabling steady trolley movement and accurate load positioning.

Equipped with overcurrent, overload, overvoltage and phase-loss protection, inverters lower failure risks.

The potential energy from descending loads can be processed by braking units or recycled via common DC bus feedback to save energy.

For new tower cranes or renovation of old equipment, variable-frequency drives reduce mechanical loss and maintenance costs, optimizing operating experience. They have become the mainstream drive solution for construction tower cranes.