Many people lack a clear understanding of the specific differences and applications between frequency converters and energy-saving devices. Energy-saving devices are generally divided into lighting fixture energy-saving devices and various power energy-saving devices. They employ high-voltage filtering and energy absorption technology to automatically absorb the energy from the reverse electromotive force of high-voltage power equipment and continuously feed it back to the load, saving the electrical energy that the equipment draws from the high-voltage power grid. Below is a brief introduction to the differences between them, mainly covering six aspects.
Energy savers differ from frequency converters mainly because:
First, frequency conversion technology is only one of many energy-saving technologies. Energy-saving technologies include many technologies such as voltage regulation and current limiting, power factor compensation, phase control power regulation, frequency conversion, chopping, filtering, energy feedback, etc. Even for energy-saving devices that use the frequency conversion principle, the frequency converter is only one unit of the energy-saving device.
Secondly, the research and development of energy-saving devices takes into account various control requirements of the application site and has various control functions that are easy to operate on site, such as temperature and pressure closed-loop control.
Third, in many industrial sites, directly wiring and installing frequency converters does not comply with electrical specifications and can easily lead to various safety accidents. Installing a complete set of energy-saving devices can reduce the occurrence of accidents.
Fourth, the energy-saving device's research and development design fully considers the safety protection of the built-in frequency converter, setting up lightning protection circuits, overvoltage protection circuits, and fault alarm functions to minimize the risk of accidental damage to the frequency converter itself.
Fifth, based on the actual needs of the production site, the energy-saving device is generally equipped with a high-performance bypass system, which can still ensure the smooth operation of on-site production in the event of an unexpected failure of the speed control unit.
Sixth, as we all know, frequency converters generate certain harmonics during operation. In many production sites, a large amount of harmonic interference often causes equipment malfunctions or even damage. When developing and designing energy-saving devices, large energy-saving companies usually install harmonic filtering devices inside the energy-saving devices to filter out most of the harmonics on-site, which is crucial for the safe production of customers.
