The metallurgical industry, as a basic industry of the national economy, has been developing rapidly. After the development period of mainly quantitative expansion, the metallurgical industry has entered a new stage of accelerating structural adjustment and improving competitiveness. The excellent characteristics of frequency conversion technology have become a consensus, so this new technology has been widely used in the metallurgical industry.

Load characteristics of steel plant application inverter

1、Fans and pumps: the torque is proportional to the quadratic of the speed, the accuracy requirement is not high, and the speed regulation performance requirement is not high.

2、Bite-energy loads: lifting equipment with large lifting torque and strong overload capacity.

3, the main rolling mill of hot and cold rolling: high commissioning requirements, strong overload capacity, high control accuracy, and fast dynamic response.

Industry characteristics

High inertia, heavy load and shock

1) smooth and shock-free starting.

2) fast and smooth braking process required.

3) large starting torque.

4) no static difference in speed regulation, fast dynamic response, and strong anti-interference capability.

5) for high-speed or high-performance need vector closed-loop control. 

Metallurgical industry application introduction

Blast furnace system Feed winch, fan de-dusting, slag flushing pump

Converter system converter tilting, oxygen lance, de-dusting fan, slag discharge car

Casting system Vertical continuous casting machine roll system, continuous casting machine big bag cover

Metal drawing machine Water tank type wire drawing machine, copper wire thin stretching machine, direct feed type wire drawing machine

Rolling mills Cold rolling mills

Other metallurgical industry Medium plate round shear unit, cold rolling coiler, shelf cold bending equipment

ZFENG inverter solutions

Everest Electric's high-performance, multi-functional inverter ZF series is widely used in the metallurgical industry. Here is the solution of EM series in metallurgical industry. 

Application of Everest ZF series inverter on rolling mill and straight-in drawing machine

1、Unwinding machine: ZF3000 tension special inverter is used for constant tension unwinding (open-loop torque or PID control), magnetic powder function is used in unwinding mode, and constant tension mode is used for winding. The terminal is used to select the initial roll diameter when the rolling direction is changed. Unwinding mode adopts point-action function to feed material.

2. Transmission: ZF3000 open-loop vector frequency converter is used to control the speed of the whole machine. The length estimation of rolling direction change is realized by PLC.

3、Winding: ZF3000 tension special inverter is used for constant tension winding. The function is the same as uncoiling.

Application of Everest ZF3000 series inverter in feed winder

1, ZF3000 bit energy special inverter, using no speed sensor open-loop vector control mode. It has the following features: magnetic field directional current vector control, complete decoupling of motor variables, 150% torque holding at near zero speed, large low frequency torque, smooth acceleration, smooth and accurate stopping.

2、Energy consumption braking device

The optional heavy-duty energy consumption braking unit BR100 can ensure complete energy consumption during high-speed over-frequency operation.

3、Electromagnetic brake 

Using the unique brake output port of the inverter to control the DC brake system of the drive unit. Combined with the zero-speed torque servo function of the inverter to ensure no slippage in any accidental situation.

Everest ZF series inverter in the application of metal drawing

1、Double frequency conversion wire drawing machine: the wire drawing process uses ZF3000, the winding process uses ZF3000.

ZF3000 special inverter for wire drawing, including FDT control function, inching threading, the winding motor does not move; normal start, the wire drawing motor and winding motor synchronous operation; shutdown, the parameters can be set to wind the motor first shutdown. 

ZF3000 winding professional inverter, using the coil diameter calculation + PID control. Slave machine automatically adjusts the speed according to the change of winding diameter to ensure that the tension balance bar is basically maintained in the middle position, and the tension of the drawing and winding process is constant. Fast response, no matter empty, half or full reel, starting, accelerating and stopping without stopping, smooth and shock-free process. No matter low speed, medium speed or high speed, the tension is always constant. 

Zhufeng inverter solution features

China's metallurgical industry is flourishing, and the speed of technological progress and renewal of metallurgical equipment will become faster and faster. As a supporting part of metallurgical equipment, inverter will play an increasingly important role in improving metallurgical performance, improving metallurgical process and saving energy. In the face of the huge, fast-growing and fast-changing demand market for frequency converters, we will explore the latest demand for frequency converters in the metallurgical industry and develop new products in time to provide better and more applicable frequency converters for the metallurgical industry.

1. It can make the ordinary asynchronous motor realize stepless speed regulation.
   
2. Low starting current, reduce the capacity of power supply equipment.
   
3. Starting smoothly, eliminating the impact of machinery, protecting mechanical equipment.
   
4. The motor has a protective function, reducing the maintenance cost of the motor.
   
5. Have a significant power saving effect.