Introduction Construction hoists, essential equipment in modern high-rise construction, play a crucial role alongside large tower cranes. Particularly in the construction of high and super-high-rise buildings, they fulfill vital tasks ensuring construction schedules, safety, cost reduction, and alleviating labor intensity. Moreover, they serve as a significant indicator of the equipment level of construction teams. This article introduces the excellent performance and energy-saving effects brought by Ausenist variable frequency drives in construction hoists.

.

.

Overview of Ordinary Construction Hoists

.

.

Control System The control system is a critical part of construction hoists, determining the overall performance. Ordinary hoists achieve lifting, lowering, and stopping functions through contactor-relay control. However, they suffer from single-speed operation, significant start/stop shocks, leading to severe damage to structures and mechanisms. Electrical components are prone to damage, and the low operating speed not only affects construction speed but also the profitability of construction enterprises. Simply increasing speed results in excessive acceleration, causing significant impact on gears, racks, and brake discs, reducing operational reliability.

.

.

Starting and Braking Systems Ordinary hoists use direct starting or star-delta reduced voltage starting, causing significant shocks, severe damage to motors and electrical components, and potential safety hazards, especially with the presence of personnel in some construction site hoists. The braking system of ordinary hoists employs mechanical shoe brake, which, when the hoist rapidly decelerates to zero speed, causes damage to structures and mechanisms and poses safety risks with falling materials.

.

.

Advantages of Variable Frequency Systems

.

.

Soft Start Compared to the power frequency starting method, using variable frequency drives can reduce mechanical vibrations and shocks, saving maintenance costs and ensuring stable operation.