Application of INVT GD350-19 Frequency Converter in Lifting Drilling Rigs

As a new environmentally and friendly pile driver, the multi-function drilling rig has the advantages of low noise, no soil squeezing, less mud discharge, and even mixing, and can be used to evaluate high-rise buildings, bridges and other projects. Compared with ordinary pipe piles, there will be no problems such as pile explosion, underfeeding, or partial piles. Compared with land-occupied piles, there will be no pillow holes, etc., which can effectively ensure the quality of pile sinking.

Customer Needs

Facing the harsh construction environment, multi-functional drilling rigs need to maintain good stability and efficiency. Through the drilling process, the soil is cut and stirred into a flow-plastic state, and the soil in the flow-plastic state relies on the gravity of the pile to sink into the hole. It overflows from the hole to overcome the pollution caused by mud without disturbing the surrounding soil.

This also requires that in the plan：
1. The inverter needs to have its own brake logic to simplify the development of customer equipment.
2. The frequency converter supports both synchronous and asynchronous motor control, which is energy-saving, environmentally friendly and has low electrical supporting costs.
3. The frequency converter can smoothly control impact loads, which requires the crane to have the ability to quickly start and stop lifting.

INVT Solution

In response to customer needs, INVT has launched the GD350-19 series high-performance lifting dedicated VFD solutions. The solution needs to have the characteristics of energy-saving and efficient synchronous motor control, and one-to-two motor switching to save electrical control costs.

In this plan, the crane piling motor works continuously, and the use of synchronous motors has a strong energy-saving effect; the hoisting control involves the built-in brake control function of the GD350-19 inverter, which greatly improves the reliability; the frequency of use of the auxiliary winch is not high, when it needs to move, it switches to walking motor control. It shares the same frequency converter with the walking motor. Through the VFD's multiple sets of motor parameter calls and control loop switching, one-to-two control is realized, saving the cost of the frequency converter.

Solution Value

The GD350-19 series high-performance hoisting-specific inverters have professional hoisting features such as professional position and speed brake control logic and hoisting. They have excellent control performance, rich safety protection functions, and strong expansion capabilities.

1. In terms of performance: a multi-functional drilling rig can sink piles more than 300 meters in a single day, and its performance has reached the international advanced level;
2. In terms of functions: multi-functional integration of pile driving, hoisting and winching, and translational walking, energy saving of about 15%-20%, and high economic efficiency.

Summarize

INVT's GD350-19 series  high-performance hoisting-specific inverters are suitable for heavy-duty multi-purpose drilling rigs and feature high reliability, safety and efficiency, as well as focus on working environment and humanization.

With the rapid development of national economic construction, the demand for high-quality and reliable construction machinery will increase day by day. INVT will continue to improve its intelligent manufacturing capabilities and help engineering construction develop more mechanized, informatized, intelligent and green.