Special frequency converter suppliers remind you that with the increasingly widespread application of frequency converters, their performance and technology are also developing rapidly, mainly reflected in the following aspects:
(l) Modularization. The modularization of new frequency converters has made great progress. The Integrated Power Module (ISPM) for general-purpose frequency converters integrates rectifier circuits, inverter circuits, logic control circuits, drive and protection circuits, and power circuits into one module, greatly improving reliability.
(2) Specialization. In order to better utilize its unique control technology and meet the needs of on-site control as much as possible, the new frequency converter has derived many specialized models, such as fan, water pump, air conditioning specialized models, injection molding machine specialized models, and elevator specialized models Specialized for textile machinery, intermediate frequency drive, locomotive traction, etc.
(3) Software based. The software based functionality of the new frequency converter has entered the practical stage, and the required functions can be achieved through built-in software programming. The frequency converter is equipped with various optional application software to meet the needs of on-site process control, such as PID control software, tension control software, synchronization control software, speed following software, frequency converter debugging software, communication software, etc.
(4) Networking. The new frequency converter is equipped with RS485 interface, which can provide multiple compatible communication interfaces and support different communication protocols. The frequency converter can be controlled and operated by a computer, and can communicate with various fieldbus networks such as Lonworks, Interbus, Device et, Modbus, Profibus, Ethernet, CAN, etc. through options. And it can support several or all types of fieldbus through the provided options.
(5) Low electromagnetic noise and quietness. The new frequency converter adopts high-frequency carrier SPWM method to achieve quietness. In the inverter circuit, current zero crossing switch control technology is used to improve the waveform, reduce harmonics, and comply with international standards in terms of electromagnetic compatibility (EMC), achieving clean energy conversion.
(6) A graphical user interface. In addition to the usual drop-down menu, the operation panel of the new frequency converter also provides monitoring and operation functions such as graphical tools and Chinese menus.
(7) Guided debugging steps. The new type of frequency converter has an internal solidification debugging guide and guides the operator's debugging steps, without the need to memorize parameters, fully reflecting its ease of operation. With the development of frequency converter technology, the self-adjusting of frequency converter parameters will become practical.
(8) Parameter trend graph. The parameter trend chart of the new frequency converter can display real-time operating status, and the operating parameters can be monitored and recorded at any time during the debugging process.
2. Future development direction of frequency converters
(l) Further improve control theory and develop control strategies. Although vector control and direct torque control have greatly improved the performance of AC speed regulation systems, there are still many areas that need further research. The future control technology of frequency converters will be further developed on the existing basis, incorporating model reference adaptive technology based on modern control theory, multivariable decoupling control technology, optimal control technology, fuzzy control based on intelligent control technology, neural networks, expert systems, process self optimization, fault self diagnosis technology, etc., making frequency converters "foolproof" and easier to use.
(2) High speed fully digital control. With the application of digital controllers based on 32-bit high-speed microprocessors, new power electronic device application technologies, Windows operating systems, various CAD software, and communication software have been introduced into frequency converter control technology, enabling various control algorithms, parameter self setting, freely designed control functions, graphic programming techniques, and other digital control technologies to be realized.
(3) Application technology of new power electronic devices. With the development of new power switching devices, turn off drive technology, dual PWM inverter technology, flexible PWM technology, fully digital automation control technology, static and dynamic current sharing technology Surge absorption technology, light control and electromagnetic triggering technology, as well as thermal conductivity and heat dissipation technology will be rapidly developed.
(4) Large capacity and small volume of frequency converters. With the development of new power electronic devices, the use of intelligent power modules for children and the increasing capacity and small volume of frequency converters will gradually be realized.
(5) More in line with environmental protection requirements, becoming a true 'green product'. The electromagnetic compatibility technology of frequency converters is receiving increasing attention. On the basis of solving the low-frequency noise of frequency converters, people are exploring solutions to the electromagnetic radiation and harmonic pollution problems of frequency converters, and have achieved positive results. I believe that in the near future, "green product" frequency converters will be showcased to people.
(6) The function of the frequency converter matching energy feedback device is to convert the mechanical energy (potential energy, kinetic energy) on the moving load into electrical energy (regenerated electrical energy) through the energy feedback device and send it back to the AC power grid for use by other nearby electrical equipment, so that the motor drive system can reduce the consumption of grid electrical energy in a single unit time, thereby achieving the goal of energy conservation.