The substrate of power electronics devices has been converted from Si (silicon) to SiC (silicon carbide), so that the new power electronic components have the advantages of high voltage resistance, low power consumption and high temperature resistance; And manufacture a drive device with small size and large capacity; Permanent magnet motors are also being developed. With the rapid popularization of IT technology, inverter-related technology has developed rapidly, and the future will mainly develop in the following aspects:
Network intelligence
The intelligent inverter does not need to set many parameters when used, and it has the function of fault self-diagnosis, which has high stability, high reliability and practicality.
At present, the new frequency converters on the market have built-in interfaces, while providing a variety of compatible communication interfaces, supporting a variety of communication protocols, and at the same time can be connected to the computer, by the computer keyboard to control and operate the inverter, and can be networked with a variety of fieldbus communication, can realize multiple inverter linkage, and even the integrated management and control system of the inverter based on the factory.
Specialization and integration
The manufacturing specialization of the frequency converter can make the performance of the frequency converter stronger in a certain field, such as the frequency converter for fans, water pumps, elevator special frequency converters, lifting machinery special frequency converters, tension control special frequency converters, etc. In addition, the frequency converter has a tendency to integrate with the motor, making the frequency converter a part of the motor, which can make the volume smaller and the control more convenient.
High performance
With the development of control theory such as vector control and torque control and the application of high-speed digital signal processors, the performance of frequency converters will become higher and higher. The development of speedless sensor vector control technology is mature, so that the frequency conversion system is free from the shackles of hardware detection motor speed, and the system size is smaller.
Increased digitalization
Benefiting from the advancement of computer technology, the frequency conversion control system will realize the close integration of AC speed regulation system and information system, and at the same time improve the overall performance of the system. In addition, with the increasingly rich AC motor control theory, the related control strategies and control algorithms are becoming more and more complex, requiring more computing and storage space, and DSP chips are widely used in the current fully digital high-performance AC speed regulation system.
Energy saving, environmental protection and pollution-free
The electromagnetic compatibility, harmonic suppression, motor noise suppression and other technologies of the inverter are the focus of attention at present, and the environmental protection of the inverter is becoming more and more important. Many countries have developed regulations and standards for limiting harmonics. Finding a way to solve the noise and electromagnetic pollution of the inverter has also become the focus of many research personnel.
Adapt to new energy
Fuel cells that now use solar and wind power as energy sources are emerging at a low price, and there is a tendency to come later. The biggest feature of these power generation equipment is that the capacity is small and scattered, and the future inverter must adapt to such new energy, which must be efficient and low consumption. Now power electronics technology, microelectronics technology and modern control technology at an amazing speed forward, frequency conversion speed control transmission technology has also made rapid progress, this progress is concentrated in the large capacity of AC speed control device, high performance and multi-function of frequency converter, structure miniaturization and other aspects.