Application Case:
1. Ball mill:
Load characteristics:it is required to have enough starting torque to meet the requirement of large load of ball mill,and ensure that the equipment can make the motor run smoothly under the condition of frequency conversion,and ensure the motor has constant power characteristic.
The variable frequency speed control system is used to transform the original ball mill drive system,which can meet the normal operation of the ball mill at low speed,ensure the normal process control quality,prolong the service life of the ball mill and motor,and reduce the maintenance.
After the modification,the equipment can realize automatic control,manual/power frequency and fault self-switching functions,and can overcome the high intertia caused by the ball mill voltage rise,effectively ensure the normal operation of the equipment.
2. Dust removal fan
PI500 series inverter of General Transmission Technology can avoid the impat of starting current,which not only has no impact on the power grid,but also can start or stop at any time.Adjust air volume as needed to avoid waste.After the conversion transformation,the air supply volume of the fan no longer needs to be adjusted by the torottle,and the impeller Angle is not needed to be adjusted,but by the frequency converter to adjust the speed of the fan,the adjustment range can be from 0% to 100%:Therefore,the air volume can be adjusted at will according to the production needs to reduce unnecessary waste;A lot of energy was saved.The energy saving rate is as high as 20%~65%,because the fan is no longer working at full load all the time after the conversion.
Reduce the working strength of the fan and extend the service life of the equipment.After the conversion transformation,most of the working time of the fan is operated at a lower speed,which greatly reduces the mechanical strength and electrical impact of the fan,greatly extends the fan’s service life and reduces the maintenance cost.
Motor and fan running speed decreased,lubrication conditions improved,transmission fault decreased;Reduce the system perssure,relieve the pressure and sealing of the pipeline,and extend the service life;Hgh reliability improves work efficiency and reduces the workload of overhaul and maintenance.
3. Geothermal drilling rig
With green,intelligent,environmental protection,energy saving as the design concept,using ac frequency conversion electric transmission as the main transmission mode,compared with the previous drilling equipment,with safety,energy saving,high efficiency,and other advantages.
4. Electromagnetic stirring
With the help of electromagnetic force generated by induction in the liquid cavity of the casting billet,the electromagnetic stirrer enhances the movement of molten steel,which is mainly rotational motion.The alternating magnetic field excited by the agitator penetrates into the molten steel of the casting billet,where and induced current is generated.This induced current interacts with the coil magnetic field to generate an electromagnetic force,thus driving the molten steel to move.
Powtran technology with strong R&D power,developed continuous casting billet,continuous casting slab electromagnetic stirring power supply.Can be used for forward stirring,reverse stirring,two-way stirring and so on.So as to improve the quality of billet,improve the economic benefits of products.The power supply is easy to install and can be installed at the mold end and secondary cooling zone.
5. Heating and heat exchange station pump
The main applications of heat exchange stations are circulating pumps and filling pumps,which can automatically adjust the speed of the pumps according to the pressure and temperature on the pipelines to ensure that the temperature and pressure of the heating network are constant and meet the requirements of heating.General transmission inverter builti-in PID control function,can be convenient according to the equipment operation requirements for PID control,high control accuracy,according to the requirements of heating to flexibly adjust the running speed of the pump motor,achieve good energy saving effect.
6. Constant pressure water supply
The water pressure is detected by the upper pressure sensor installed in the pipe network,which is converted into 4~20mA current signal and fed back to the frequency converter.According to the set value and the actual feedback value,the inverter USES the PID control automatic adjustment,changes the frequency output value to adjust the controlled pump speed,in order to ensure the pipe network pressure constant requirements.
7. Central air-conditioning system
1) The inverter operation interface is LED display with abundant monitoring parameters;The keyboard layout is simple and easy to operate.
2) The inverter has a variety of electronic protection devices,such as overcurrent,overload,overvoltage,overheat,undervoltage and shortage,and has fault alarm output function,which can effectively protect the normal operation of the water supply system;
3) After installing the frequency converter,the motor has the functions of soft start and stepless speed regulation,which can greatly reduce the mechanical wear of the water pump and motor,and extend the service life of the tube set;
4) The inverter is equipped with a large capacity filter capacitor,which can effectively improve the powerfactor of the electrical equipment;
5) The system realizes the PID closed-loop adjustment of temperature,the indoor temperature changes smoothly,and the human body feels more comfortable.
