Can using a variable frequency drive save energy?Unikeyic debunks these common misconceptions!

Many devices nowadays are equipped with inverters, and many people's initial reaction to this is energy saving. However, the mere installation of an inverter does not necessarily guarantee energy efficiency. There are actually many misconceptions surrounding inverters. Whether it is purchasing or using such components, it is necessary to have a good understanding of relevant knowledge. Next, I will share a list of misconceptions about inverters from an online electronic componentstrading website.

Variable frequency drive may not necessarily save energy

In fact, whether any device is energy-efficient or not mainly depends on the speed control characteristics of the load. Whether a variable frequency drive can play a role in speed control depends on the specific equipment. In devices such as centrifugal pumps or blowers, the variable frequency drive can change the speed, thereby saving electricity when the device is not operating at full load. However, for transmission devices, even if the frequency is changed, speed control cannot be achieved, thus rendering the energy-saving function of the variable frequency drive ineffective.

Selecting variable frequency drive capacity based solely on power is not recommended

Although a variable frequency drive may not always lead to energy savings, it is an indispensable component in many devices. Therefore, common misconceptions when choosing a variable frequency drive should be understood, such as selecting the capacity of the variable frequency drive based only on the rated power of the motor. When choosing a variable frequency drive, cost must naturally be considered. Since the price of a variable frequency drive is not low for electric motors, after ensuring safe and reliable operation, efforts should be made to reduce capacity as much as possible. Considering that motors with the same capacity may have different pole numbers, the rated current also varies. As the pole number increases, the rated current will increase, so the selection of capacity should not be based solely on current; factors like load, safety margin, and motor specifications should also be taken into account.

Variable frequency drives cannot replace valve regulation

Due to the frequency-changing effect of variable frequency drives, some people mistakenly believe that they can act as valve regulators in practical use. This is not the case. The main function of a variable frequency drive is to save energy, so it cannot replace fan valves. This distinction should be clear during the design phase.

The above are the key points to understand about variable frequency drives. More knowledge about variable frequency drives and other components can be found on unikeyic. When purchasing components, it is advisable to first understand relevant knowledge and then utilize industry websites to improve selection and purchasing efficiency.