Taking the logistics industry as an example, although foreign brands have mature technology and obvious first-mover advantages and brand effects. Nowadays, domestic inverters are expanding their market share in the logistics industry year by year, proving their competitive strength. Next, we take Xinshida inverter as an example to discuss how domestic inverter successfully occupies a place in the logistics market under the first-mover advantage of foreign brands.
The technical difficulties of inverters in the logistics industry
In the logistics industry, AC drives are used in a wide range of applications, from conveyor belts and sortation systems to stackers and cranes. These specific application stations have extremely high performance requirements for the frequency converter, so the technical difficulties that need to be overcome have become particularly clear.
Difficulty 1: Be able to accurately control the speed and location of cargo movements
STEP technology: double closed-loop control technology
At the same time, two feedback loops of speed and position are adopted, the speed loop is used to quickly collect the motor speed in real time, and the position loop collects the absolute positioning of the machinery, that is, double closed-loop control, and realizes the stable and balanced control of current torque under the maximization of motor efficiency through efficient algorithm control.
Difficulty 2: When the vertical warehouse hoist is applied, it can prevent the cargo-toe wheel caused by the position change caused by the goods entering and exiting the car
STEP technology: dynamic leveling function
On the basis of not changing the mechanical transmission and motor configuration, combined with the double closed-loop control technology of speed loop and position loop, and at the same time enabling the software function of dynamic leveling, relying on the powerful zero-speed hovering ability, to ensure the stability of the four-way vehicle-mounted cargo incoming/outgoing hoist.
Difficulty 3: On the premise of ensuring the smooth transportation of goods, arrive at the target location in the shortest time
STEP technology: direct docking algorithm
Dynamically plan the position curve to ensure that the target position is reached in the shortest time; The position curve is filtered by secondary FIR to generate smooth acceleration to ensure the smooth transportation of goods; After it is in place, it is calibrated with the leveling limit to ensure that the final leveling accuracy is ±1mm.
Difficulty 4: Prevent load swing and improve efficiency and safety
STEP Technology: Anti-Shake Function
Due to the pendulum system composed of the inertia of the lifting weight and the suspension cable, the lifting weight will swing during its operation, especially in the starting and deceleration phases. Load swing during crane movement is a very serious and common problem, which can affect the ability to work effectively. The anti-sway function triple suppresses oscillation, effectively preventing the load from swinging during the acceleration and deceleration of large and small vehicles.
Difficulty 5: Convenient debugging
STEP technology: host computer software + servo control block
The parameter setting of the frequency converter is essential for its proper functioning, and incorrect settings will not only cause the frequency converter to not work properly, but in some cases, it may also cause damage to the frequency converter. Host computer software: customized debugging wizard for the logistics industry to guide customers to debug on site; Dynamic self-learning, no need to input mechanical gear ratio and wheel diameter, automatic calculation of rated linear speed; Servo control block: According to the user's programming habits, the packaged servo control block is written for the customer's reference. To achieve time-saving debugging and labor-saving programming, users can control the position mode of ET6L inverter by simply dragging the variables of the original program to the pins of the control block and making simple program modifications.
The intelligent and flexible ET6L series of special inverters for the logistics industry is the latest generation of transmission products developed by Xinshida for the current market characteristics and needs of the logistics industry, and is an all-round transmission product suitable for industrial production transmission links, inheriting the latest generation of design concepts, comprehensively simplifying, and can effectively improve your production efficiency. The intelligent and flexible ET6L series of special inverters for the logistics industry have overcome the above five technical bottlenecks at the same time, combined with the actual application of the inverter, the walking waveform data shows that the technology has reached the advanced level of the industry.
The application of frequency converters in the logistics industry
Frequency converters play a vital role in a wide range of machinery and equipment in the logistics industry. The application in the following logistics equipment is particularly critical.
Hoist
The frequency converter can precisely control the speed and acceleration of the hoist, ensuring that the goods are lifted and lowered smoothly while avoiding mechanical shock and vibration caused by speed changes.
Stacker
The stacker crane is mainly used for automatic stacking and retrieval of goods in the warehouse. The use of frequency converters enables the stacker crane to operate at a precisely controlled low speed, which not only ensures the accuracy of the operation, but also reduces the wear and tear of the machinery and improves the overall operation efficiency.
crane
During material handling, cranes need to move heavy loads in different directions and speeds. By using the frequency converter, the starting, running and stopping speed of the crane can be adjusted steplessly to achieve smooth start and stop and avoid load swing and mechanical impact.
Conveyor lines
The frequency converter can precisely control the speed of the conveyor belt; Reduce the failure of conveyor belt equipment caused by overload, overheating and other problems, and improve the reliability and stability of the system; The inverter also reduces energy consumption by adjusting the voltage and frequency of the output power supply.