Abstract: This article will introduce 10 cutting-edge frequency converter technologies currently available in domestically produced general-purpose frequency converters , covering low electromagnetic noise, quiet operation, specialization, systematization, networking, "easy-to-use" mode, parameter trend graphs, built-in application software, distributed application, parameter self-adjustment, and software-based function settings. These 10 cutting-edge frequency converter technologies will be explained in detail below.
(1) Low electromagnetic noise, quiet operation
In addition to employing high-frequency carrier-based sinusoidal SPWM modulation for noise reduction, domestically produced new general-purpose frequency converters also incorporate AC reactors or active power factor correction (APFC) circuits on the input side. Furthermore, they utilize Soft-PWM control technology in the inverter circuit to improve the input current waveform, reduce grid harmonics, and meet EMC international standards in terms of interference resistance and high-order harmonic suppression, thus achieving the so-called clean energy conversion. For example, the flexible PWM control technology used in domestic frequency converter brands like Anbangxin achieves even lower noise operation.
(2) Specialization
To better leverage the unique functions of variable frequency speed control technology and meet the needs of on-site control as much as possible, domestically produced new general-purpose frequency converters have spawned many specialized models. Taking Shenzhen Anbangxin System frequency converters as an example, specialized models have been developed for various professional application fields, such as those for fans, water pumps, and air conditioners; cranes; constant pressure water supply; CNC machine tools; textile machinery; synchronous conveyors; sand dredgers; wire drawing machines; and air compressors.
(3) Systematization
In addition to developing digital, intelligent, and multifunctional standalone inverters, domestically produced general-purpose inverters are also moving towards integration and systematization. The completion of these technologies allows for the integrated configuration of inverters, servo devices, controllers, and communication devices. Even automation and drive systems, communication and data management systems can be integrated, much like drive devices are typically embedded in "fully integrated automation" systems, with the aim of providing users with optimal system functionality.
(4) Networking
The domestically produced new general-purpose frequency converter can provide a variety of compatible communication interfaces, support a variety of different communication protocols, and has an internal RS485 interface, which allows personal computers to input running commands and setting function code data to the general-purpose frequency converter.
(5) "Easy to use" mode
The "Debugging Guide" embedded in the domestically produced new general-purpose frequency converter will guide you step by step to fill in the debugging form, without needing to remember any parameters, which fully reflects its ease of operation.
(6) Parameter trend graph
The parameter trend chart of the domestically produced new general-purpose frequency converter can display the current operating status of each signal in a timely manner, and users can monitor and record the operating parameters at any time during the commissioning process.
(7) Built-in application software
Domestically produced new general-purpose frequency converters can be equipped with a variety of application software. Some brands can provide more than 130 application software to meet the needs of on-site process control, such as PID control software, tension control software, speed chain, speed tracking, current balancing, frequency converter function setting software, communication software, etc.
(8) Distributed Applications
Modern automation engineering tends towards distributed solutions, which requires intelligent devices to be modular, distributed, and capable of integrating with modern machinery. This not only brings cost advantages in production, machinery commissioning, and maintenance, but also provides high flexibility for equipment expansion.
(9) Parameter self-adjustment
Users only need to set the data group code, instead of setting each item individually, and the general-purpose frequency converter will automatically adjust the operating parameters to the optimal state.
(10) Function settings are software-based
The functions of domestically produced general-purpose frequency converters can be set and downloaded under the WINDOWS95/98 environment, and they can also perform data communication.
